brooks road pump station improvements bl038-20 add4.pdf · brooks road pump station improvements...

April 28, 2020

Addendum #4

Brooks Road Pump Station Improvements

BL038-20

1. Instructions to Bidders

Delete Article 9 in its entirety.

2. Supplementary Conditions

Delete Paragraph SC-4.06 in its entirety and insert the following:

SC-4.06 Delete Paragraphs 4.06.A, 4.06.B, and 4.06.F in their entirety and insert the following:

A. No reports or drawings related to Hazardous Environmental Conditions at the Site are known to the Owner.

B. Not Used. F. If after receipt of such written notice Contractor does not agree to resume such Work based

on a reasonable belief it is unsafe, or does not agree to resume such Work under such special conditions, then Owner may issue a Work Change Directive or Change Order as appropriate. The Work Change Directive or Change Order will, with the Contractor’s concurrence for determining that it is safe to return to work, or determining conditions under which work may resume, provide direction for either deleting the portion of the Work that is in the area affected by the condition, or taking other action as directed by the Owner and Engineer. Contractor may be entitled to an adjustment in Contract Price or Contract Times for impacts to the Work in the affected area, if any, if Work is resumed after the site has been cleared. Owner will be entitled to a adjustment in Contract Price or Contract Times if Work is deleted. If Owner and Contractor cannot agree as to entitlement to or on the amount or extent, if any, of an adjustment in Contract Price or Contract Times as a result of deleting such portion of the Work, then either party may make a Claim therefor as provided in Paragraph 10.05. Owner may have such deleted portion of the Work performed by Owner’s own forces or others in accordance with Article 7.

3. Questions

Q1. Regarding Note 2 on drawing C-104, is there anything specific that needs to be coordinated? A1. There is no specific coordination item. The laydown area is limited, and the Contractor needs to

coordinate with GCDWR to make sure the final area does not interfere with normal operations. Q2. Is there any clearing & grubbing required for the construction staging and laydown area? A2. There is minimal clearing and grubbing required.

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Q3. Section 01 52 13 does not mention a field office for the engineer. Is the contractor required to furnish a

field office for the engineer? A3. There will be no field office required for the engineer. However, engineer may use contractor’s field

office occasionally. Q4. Can you confirm that the peak flow and head conditions listed in Section 33 01 30.74 Part 2.1 A. 1 are

correct? A4. The Peak Flow and Head Conditions listed are correct. Q5. To make this head and flow you will have to have a feeder pump going into a booster pump as a system

and you will have two systems each capable of 2500gpm (4 pumps) to make the 5000gpm. If it were decided to use an electric pump system as primary and a diesel system as lag to make the 5000gpm will it be necessary to have 2 complete diesel systems (2 feeders and 2 boosters)as backup to make the 100% redundant or will one diesel backup system be good enough (one electric and 2 diesel systems total)?

A5. The contractor will need a completely redundant diesel system. If electric pumps are used, the contractor shall establish how to supply power to the pumps. This shall be the contractor’s responsibility. The design condition for bypass pumping will need primary and backup system capable of meeting this condition.

Q6. To further question Q5, if we ran two electric systems would it require 2 diesel systems as backup to

meet the 100% redundancy? A6. Yes. The backup system will require 2 diesel systems. Q7. The main bypassing manhole will be the manhole outside the fence. This manhole is an offset doghouse

that the pipe is just cracked enough to allow water to flow into the main 48” line. It would be best to have this crack opened up so you can get a suction line into the 48” pipe to be able to keep the pipe from being full and give us some storage. Will it be ok to alter this manhole?

A7. The manhole has already been modified as described. If required, the contractor may submit additional proposed manhole modifications for GCDWR’s review and acceptance during construction.

Q8. It was stated to have the necessary hoisting equipment for each pump onsite during the bypass. The

pumps weigh 24,000lbs and will take a crane to move them will we need to supply a crane to be onsite 24/7 during the bypass because there is no room. Will a lift that can remove suction tubes in case of a clog and can lift pipe for replacement if needed suffice?

A8. A lift capable of moving pipes and servicing pumps as needed during bypass would be acceptable. Q9. Section 32 31 13 Part 2.1 A., says “Match style, finish and color of each fence component with that of

other fence components.” Does that mean that the proposed fence needs to match the existing fence or are we to provide the fence specified?

A9. Add Note 7. to C-502 “CONTRACTOR SHALL MATCH EXISTING FENCE HEIGHT OF 8’ FOR ALL INSTALLED FENCING ON SITE.”

Q10. A note and leader on E-103 says, “Saw cut and remove concrete portion of flume. Provide concrete and

match flume contours.” Is there any as-built information available on the flume? A10. Contractor shall return the flume to the pre-existing condition. Q11. Drawing C-104 defines an area on site to be used for bypass pumping. Is there any information available

on temporary suction and discharge points for the bypass pumping operation? A11. Sheet C-101 provides information for the sanitary sewer manholes and the existing 12” DIP bypass line

that are located within the defined by-pass pumping area. Q12. Can you get clarification on how these doors are to be hinged? The drawings appear to show the 5 X 5's

as single leaf and all others as triple leaf doors and the spec is calling out single and double leaf. Also there is no mention of lift assist in the spec but these size doors will require SS gas shocks for lift assist

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A12. Provide stainless steel Pneumatic Lift Assist for Aluminum Access Hatches. Q13. On sheet S-103, Note #4 indicates a Thern Davit crane, the supplier is asking about the material of

construction, is the unit 316 stainless steel or powder coat finished? (updated model #’s are 5PT10-M1 for powder coat or 5PT10-M3 for 316SS)

A13. Revise Note #4 on sheet S-103 to the following: “4. Provide Thern Commander 1000 Davit Crane with side mount model 5BW10 or engineer approved equal at each service platform. Crane shall be rated for 500 lbs. Provide SST 316 fasteners and base and a powder coat finish for crane.”

Q14. On sheet S-101 for the hatches, Note #2 says to sawcut to remove the hatches, however detail F shown

on Sheet S-301 indicates that we are not to remove rebar in these areas. It appears this detail requires us to “jack-hammer” out the concrete to save the existing rebar, is this the intent versus sawcutting the whole depth around the existing hatches?

A14. Only the reinforcement to be removed is the reinforcing bars in conflict with the new hatch. Q15. The Bypass Pumping specification, section 3.1K, indicates that hoisting equipment for each pump be on-

site during bypassing. We expect these pumps to be heavy, which would require a crane to lift. The bypassing plan requires us to have back-up pumps installed for all pumps which would give us time to mobilize a crane to service the pumps. Will this be acceptable, or are you requiring us to have a crane on site at all time?

A15. See A8. Q16. The current project completion time is only 270/300 calendar days. The specified pump vendor, Flygt,

provided the following list of manufacturing and delivery times of the pumps. If we add at least 8 weeks of submittal and approval time. The pumps don’t arrive until week 31 of a 38 week project. The pump installation, electrical work and start-up/testing/commissioning of the pump station will take at least 3-4 months after this. This project is at a minimum a 12 month duration, if not 14 months. Please consider adding completion time to the project.

• 8-10 weeks to manufacture • 1-2 weeks testing and approval. • 2 weeks for Anti Spark Face on submersible pumps. • 5 weeks Ocean • 4 weeks delay in shipping so far due to Pandemic (worst case so far) • 21-23 weeks to site (worst case) from approved drawings or sooner at this time

A16. Due to current conditions, the contract time is changed from 270 days to 390 days for Substantial completion and 300 days to 420 days for Final completion.

Q17. Are the design points intended to be the test points? A17. Yes, at a minimum the test shall include the specified design points. Q18. The current pumps run on the pump curve at the flows listed in the specification which allows for a

negative tolerance. The specification does not:

If you use the current design flows under this specification then the pumps would have to be able to pump up to 10% more and still meet the non-overloading requirement. The current pumps which are the

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Addendum #4

basis of design would not meet this spec. I propose adding a test spec based on the design points to include HI 1U Guarantee Points of:

Individual HI IU no negative tolerance Guarantee test points: 1. Test to HI 1U Q&H 4484@180, Non Overloading at 385HP to Runout. 2. Test to HI 1U Q&H 6502@154, Non Overloading at 385HP to Runout. 3. Test to HI 1U Q&H 7890@135, Non Overloading at 385HP to Runout.

I also propose adding the series design point since the pumps will have to be designed to withstand the pressure of two of them in series. They may want them to be interchangeable as well. The existing pumps have 250lb flanges for example. For example: If you use the test points you would double the head (but the pumps won’t be tested in series so you could use the design points For the current pumps I would use:

4780 @ 359ft design 6780 @ 305ft design 8190 @ 267ft design

This is based on the pumps that are installed now and I attached a curve. The second curve has duty points that double the head of the HI 1U test points. Using these duty points will allow both the new and existing pumps to meet the specification.

A18. See revised specification Section 43 21 39. Q19. Article 9 of the Instructions to Bidders states “The Engineer does not make any representations as to the

soil conditions to be encountered or as to foundation materials. The Contractor must assume all risk as to the nature and behavior of the soil which may be encountered or of soil or water which underlies the Work or is adjacent thereto, including any difficulties that may be due to quicksand or other unfavorable conditions that may be encountered in the Work, whether apparent upon surface inspection or disclosed only in the process of carrying forward the Work”. Are you denying the Contractor the right to a Different Site Condition under GC 4.03? What is the intent of this Article? General Conditions 4.06.F. implies the Owner may unilaterally direct the Contractor to resume work in an area the Contractor considers unsafe due to the discovery of undisclosed Hazardous Environmental Conditions. Is this the Owner’s intent?

A19. Article 9 of the Instructions to Bidders has been deleted, see #1 above. Indicating a Work Change Directive or Change Order as a vehicle to amend the contract is not intended to imply that the Owner would direct the Contractor to proceed with work in an unsafe manner. The paragraph has been revised to clarify this intent, see #2 above.

Q20. On the bid form Part 1 Item 1.9 it calls for wet well coating. On page 16 of the drawings attachment on

the coatings schedule it calls for wet well 301,302,303, distribution chamber DC 200 and inlet chamber IC 200 to be coated. Can you clear this up please as to what exactly needs to be coated?

A20. Item 2.17 on the bid form has been updated with language and designations found on the plans for clarity. The bid form has been revised as part of this addendum.

Q21. Plan sheet G-001, General note 19 states all disturbed areas shall be sodded unless noted otherwise in

the contract documents. Specification section 32 92 00 provides information for both seeding and sodding. Please clarify whether seeding or sod is required.

A21. Add Note 3 to C-104 “3. CONTRACTOR SHALL RESTORE ALL DISTURBED AREAS TO MATCH THE PRE-EXISTING CONDITIONS OF THE SITE.”

Q22. Are any of the existing pumps, valves, gear, etc. to be salvaged and turned over to the Owner? A22. The Contractor shall salvage and turn the two wet well pumps and their cables. They should be

delivered to DWR Central. The GCDWR staff will unload this equipment. The pumps and the pump cables should not be damaged during transport.

Q23. Section 01 45 23.13 Part 3.3. lists test procedures for concrete structures. Please confirm that the

Contractor does not need to leak test the existing inlet chamber, distribution chamber and wet wells.

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A23. The contractor does not have to leak test the existing inlet chamber, distribution chamber, and wet

wells. Q24. Section 01 50 00 Part 1.9 list requirements for temporary heating until permanent heating equipment has

been installed. No heating equipment is being installed under this contract. Please confirm whether temporary heating is necessary.

A24. Temporary heating is not required for this project. Q25. Section 01 00 00 Part 3.4 A indicates that the Owner will pay for all water required to execute the work.

Section 01 50 00 Part 1.3 E indicates that the Contractor shall pay for construction water. Please clarify. A25. Remove the existing section 01 50 00 Part 1.3E and replace with the following: “the Owner will not

charge the contractor for all water used to execute the work. However, hydrant meter issued by the County must be used to track the usage volume.

Q26. Can you provide an email address for Mike Clark (Georgia Power)? A26. Revise Note 10 on sheet E-101 to the following: “CONTACT: MIKE CLARK 770-995-4789” Q27. Are there any specific requirements for the Contractor Quality Control Officer listed in 01 45 00 Part 1.4? A27. The only requirement is that the CQC Officer shall have a minimum 15 years of experience in Industrial

Pump Station construction. Q28. Drawing E-101: Specific Note # 5 references a detail # 7 on sheet E-504. The drawing I have only as 6

details. A28. Specific Note #5 shown on Drawing E-101 shall be modified to reference Detail 3 on Sheet E-502. Q29. Drawing E-101: Specific Note # 10 states that the contractor is to pick up the 2 new concrete pads at

Georgia Power’s facility. Will Georgia Power load these pads on the contractor’s truck when they pick them up or does the contractor need to have a way to load them?

A29. Georgia Power to load Pads. The Contractor shall coordinate with Georgia Power for pick-up. Q30. The phone number for Mike Clark on that same drawing and note is incorrect. A30. See A26. Q31. Please clarify scope of arc detection system for SWGR 1&2. Does the entire SWGR 1&2 need to include

light sensors to detect an arc flash event or just the main breaker structure? A31. Contractor shall provide on main and branch breakers. Q32. For FS1 & FS2 is the motorized function for opening and closing the switch or just opening/tripping the

switch? A32. The motorized operation is for opening and closing. Q33. Can FS1 and FS2 be specified as an electrically-operator breaker instead if remote opening and closing

are required? A33. Provide Short Circuit/Arc Flash Study to indicate what can be used with an incident level to be 40

(cal/cm2) or less. Q34. For MB1 through MB4, will a digital power meter be an acceptable substitute for the analog meters

specified on drawings? A34. Digital power meter is acceptable. Q35. Regarding the coatings, I don't see any measurements of the wet wells, inlet chamber or distribution

chamber either. I can somewhat make out the depths but I don't see anything on the lengths and widths. A35. The contractor is responsible to perform quantity takeoffs for coatings of these areas.

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Q36. Was the electrical re-feed of Brooks Rd a past project out for bid that might have been cancelled and/or

delayed? A36 The electrical re-feed of the pump station was not a previous project for GCDWR. Q37. According to one of the three named generator vendors, the combined lead time for submittals and

delivery (after approval) is currently in the 34-36 week range. The specifications say to allow 30 days for the engineer to approve submittals. We have not heard from the other two generator vendors yet, but at this point, delivery of the generator appears to exceed the 270 day duration for substantial completion. Will you consider extending both substantial and final completion by an appropriate amount?

A37. See A16. Q38. Please advise if the 12-Sequencing Constraints listed in Paragraph 1.6 of Spec Section 01 14 00 are in

chronological order as they should occur during construction. A38. The sequencing constraints listed are not necessarily in chronological order. Q39. Paragraph 1.6.A.4 states the Contractor shall “provide and install 15kv conduit and manhole as indicated

on the drawings.” Please advise where the manhole is located. A39. These are shown in sheet E-101 East and West of new generator. Q40. Drawing E-101 indicates Georgia Power will furnish and install:

a. Conduit and underground 15KV conductors shown as P-103, P-104 & P-105 b. 2 each 15 KV Splice Boxes c. HDPE 15KV conduit near the force main at the end of new generator “G2” d. 2 each pre-cast concrete transformer pads for “T1” & T2” (picked up and set by contractor) e. Transformers “T1” & “T3”

Please confirm the only 15kv conduit and conductors that are furnished and installed by the Contractor is “P-102”. This item cannot be completed until the pump station is being by-passed.

A40. P-102 is correct.

Q41. Is temporary by-pass pumping required for the Brooks Road PS while Georgia Power installs new power service for the Booster Pump Station? Georgia Power’s scope of work is shown on Drawing E-101.

A41. Yes, Bypass pumping of the Brooks Road PS is required as specified in section 33 01 30.74. See also the response to Q42 regarding the operation of the Booster Station.

Q42. Will the Booster Station be taken out of service while Georgia Power performs their work or will the

Owner operate the Booster Station utilizing an existing Generator? A42. The Booster Station will remain in service and the County will operate the Booster Station utilizing the

existing generator on site. Q43. Can the Contractor utilize Transformers T1 and T3 to provide power to temporary by-pass pumps while

the Brooks Road Pump Station is being by-passed? A43. No, the bypass requirements are specified in section 33 01 30.74. Q44. Will the Booster Pump Station be utilized while the Brooks Road Pump Station is being by-passed? A44. The Booster Pump Station will be online during the by-pass pumping of the Brooks Road Pump Station. Q45. Will the Owner require all equipment (Pumps, Valves, Electrical Switchgear, etc.) to be onsite prior to by-

passing the Brooks Road Pump Station? A45. Yes, due to uncertainty of lead times for major equipment, the major equipment will need to be onsite. Q46. Can the contract time for substantial completion be extended to 18-months? It is our understanding the

pumps currently have a lead time of 25-29 weeks after approval (plus 6-weeks for submittal preparation and 2-weeks for Engineer/Owner Review).

A46. See A16.

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Q47. Will Tetra Tech be the Construction Manager for this project or will the Owner utilize a 3rd party for these

services? A47. Tetra Tech will be the Construction Manager for this project. Q48. Please confirm the Contractor may use the existing Overhead Bridge Crane to transport material during

construction. A48. Yes the Contractor will be allowed to use this equipment. GCDWR will have crane inspected before

contractor starts work and require inspection after they are complete. The contractor will be responsible ensure the crane is returned to the same or better condition we project is complete.

Q49. Will the Owner want to salvage any existing pumps or electrical equipment? If so, please advise where

the material should be delivered and if the Owner will off-load the material. A49. See A22. Q50. Specification Section 01 14 00 requires substantial completion within 270 calendar days. We have been

advised that the pumps and starters will take approximately 29 weeks for delivery after approval. Assuming submittal preparation and approval takes 12 weeks this puts the delivery of the equipment at 10-11 months. We are requesting the construction schedule be extended to 450 days to allow for procurement and delivery of the equipment.

A50. See A16. Q51. Based on the information we are receiving from our pump supplier (see conversation below) we request

the contract time to complete this project 270/300 days to 420/460 days. A51. See A16. Q52. Bid Item 2.1 is a unit price item for bypass pumping. This item has a substantial cost for mobilization

that will only be paid with the first week’s rent. There is no bid item for the mobilization so those costs must be included in bid item 2.1. Do you want to add a bid item for mobilization of the bypass system in case it is used for multiple consecutive weeks?

A52. A bid item is not going to be added. The contractor can provide an item in the proposed schedule of values to be reviewed by the County.

Q53. There are two (2) JWC Environmental Channel Monsters (Model CDD-5020 and each rated at 28.9 MGD)

in operation at the Brooks Road P.S. Please confirm that an identical grinder is to be supplied under Section 46 24 33, Open-Channel Grinder. Also, please change the specified flow per grinder to 28.9 MGD in subsection 2.1.B.1 of the Open-Channel Grinder specification.

A53. Item 2.1.B.1. in Specification Section 46 24 33 has been revised to match the 28.9 MGD flow rate. Q54. In reviewing the major equipment fabrication and delivery, this project will have a large amount of lost

time, prior to having any actual work start on site. Under normal economic condition we are looking at least 6 to 7-months fabrication time on the pumps and gear after approved shop drawing. If you add in the review time for the submittal, you would be at 8 to 9-months which is all we have for duration under the present contract. Under normal condition this project would need another 6 or 7-months duration to complete work once the equipment was on site. Approximately another 210 calendar days need on Substantial Completion. Please provide the appropriate time into the contract.

A54. See A16. Q55. Under Spec Section 01 14 00 1.6 A 4 – states the contractor to provide and install all 15kv conduit and

manhole as indicated on the drawings. Please indicate where this manhole and conduit are located on the drawing.

A55. See A39. Q56. It appears the drawing E-101 that the only 15kv conduit & conductors that are F&I by the Electrical

Subcontractor is P-102. If this is correct, then you cannot complete this work until after the pump station is being temporary by-pass pumped. Please confirm or clarify.

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A56. See A40. Q57. For Flygt pumps, from release to production to delivery on job site is 25 – 29 weeks. Square D products

are similar – 24 weeks approximately. On top of this you should consider 6 weeks for submittals, the pump submittal can be done right away but the Reduced Voltage Soft Start Cabinets will take longer. In addition to those numbers you should consider delays for review. So for submittals and delivery 31-35 weeks not including review time. Basically production time has doubled in the last 2 months, if things improve the delivery is likely to go down. This is based on what we think conditions might be in the first week of June (Receiving a PO). Please consider an extension to the contract time.

A57. See A16. Q58. In the switchgear specification section 26 23 00 and others, the section details General Electric as an

approved manufacturer. The division of GE (GE Industrial Solutions) that manufactures electrical distribution equipment was sold to ABB in 2018. ABB still manufactures equipment as GE branded, could we please have confirmation that GE branded products by ABB will be acceptable on the project?

A58. ABB is acceptable. Regardless of equipment manufacturer selected by contractor for basis of proposal, all gear, panels, starters, contactors, drives, etc., shall be supported by the manufacturer for a period of not less than 18 years after installation. This shall include availability of replacement parts, software, firmware, breakers, rebuild kits, etc.

Q59. The painting schedule on D-103 shows estimated quantities in SF of items to be painted. Since there are

no unit prices for painting, how will over-runs in quantity be handled? A59. Owner Directed Unit Prices for the specified painting/coating applications have been added to the

Measurement and Payment specification (Section 01 22 15) and the Bid Form. See attached revised Bid Form.

Q60. Regarding the painting schedule on D-103, in which bid item should ID 3, 7, 8 and 9 be carried? A60. Contractor to carry these costs in bid item #6 Installing New Pumps. Q61. The drawings do not show any exposed outdoor piping, so can the contractor assume that all of the

existing exposed piping to be painted (2,600 SF) is inside the pump station? A61. Exposed piping also includes DIP vents, transducer stubs, or DIP blind flanges above the wet well. Q62. My question has to do with the conduit specification section 26 05 33.In Para. 2.1 (Products) they list

Aluminum Rigid Conduit (ARC) and PVC Coated Aluminum conduit as types used. In Para. 3.1 (Execution) they only list (A)- Outdoor Locations for conduit types to use. There doesn’t seem to be a listing for the type of conduit you would use for exposed indoor areas. IE: The electrical room. It seems very expensive to use PVC Coated Aluminum for the electrical room. Perhaps it is there but I can’t find it.

A62. Electrical room is to be threaded aluminum conduit. Q63. Paragraph 2.2-A.2 of Spec Section 33 34 16 states that 3-New Plug Valves shall be installed on the

discharge side of Pumps 302B, 303B, and 305B. Drawing D-104 shows 1-New Plug Valve on the discharge side of Pump 303B and it also shows the Plug Valves on the discharge side of Pumps P301B and P302B are existing and will remain. Please ask the Engineer to clarify the number of New Plug Valves required on the discharge side Pumps 301B, 302B, and 303B.

A63. There is 1 new 24” plug valve on the discharge side of pump P303B and 2 new chainwheel operators for the existing 24” plug valves on the discharge side of pumps 301B and 302B. See revised specification Section 33 34 16.

Q64. Please clarify Valve Size and Tag Numbers referenced in Paragraph 2.2-A.2 of Specification Section 33 34

16. Is Pump 305B applicable for this project? A64. See revised specification Section 33 34 16. Q65. Please clarify which Plug Valve(s) are required to have Class 250 Extra Heavy Flanges as noted in

Paragraph 2.2-A.2.c of Spec Section 33 34 16.

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A65. The proposed plug valve EPV-303B is required to have Class 250 Extra Heavy Flanges. Q66. Please advise if all Flanges on the Discharge Side of Pumps 301B, 302B, and 303B are to be Class 250

Extra Heavy Flanges (including pipe, fittings, and check valves) A66. All Flanges on the Discharge Side of Pumps 301B, 302B, and 303B are to be Class 250 Extra Heavy

Flanges (including pipe, fittings, and check valves). Attachments:

Section 01 22 15

Section 33 34 16

Section 43 21 39

Section 46 24 33

Revised Bid Form

Sincerely,

Dana Garland Dana Garland, CPPB

Purchasing Associate III

Please read the following regarding the bid due date on May 5, 2020 at 2:50 PM:

The County’s mail room has reduced their hours in response to COVID-19. Any mail received after 12:00 P.M. may not be processed until the following business day.

Any bidders mailing in their bids must ensure that it arrives prior to 12:00 P.M. on May 4, 2020, or it may not be delivered to Purchasing’s Office in time for the 2:50 P.M., May 5, 2020 deadline and will not be accepted. It is the responsibility of the bidder to ensure bids are delivered on time. It is recommended that all bids be mailed in rather than be hand delivered.

The Department of Financial Services lobby/front desk area is currently closed. At this time on bid opening days, the door will be open for a brief time prior to the 2:50 P.M. deadline to allow hand-delivered bids. Deputies will measure the temperature of each person who enters the building using a no-touch infrared thermometer. If the temperature measures 100.4 degrees Fahrenheit or above, the person will not be permitted to enter the building. Any bidders that choose to hand deliver bids and wish to attend the opening will be required to stand six (6) feet away from other attendees to remain in compliance with CDC recommendations. The number of people permitted to be in the room will be limited to space available and shall not exceed ten (10) people.

As always, responses will be posted that afternoon or the following business day on the County’s website, www.gwinnettcounty.com.

Gwinnett County Department of Water Resources Measurement and Payment

Brooks Road Pump Station Improvements 01 22 15-1

SECTION 01 22 15

MEASUREMENT AND PAYMENT

PART 1 GENERAL

SUMMARY

A. Section Includes

Paragraph Title

1.2 Descriptions

1.3 Nonpayment for Rejected or Unused Products

1.4 Partial Payment for Stored Materials and Equipment

1.5 Bid Items

B. Scope

The Bid lists each item of the Project for which payment will be made. No payment

will be made for any items other than those listed in the Bid.

Required items of work and incidentals necessary for the satisfactory completion of the

work which are not specifically listed in the Bid, and which are not specified in this

Section to be measured or to be included in one of the items listed in the Bid, shall be

considered as incidental to the work. All costs thereof, including Contractor's overhead

costs and profit, shall be considered as included in the lump sum or unit prices bid for

the various Bid items. The Contractor shall prepare the Bid accordingly.

Work includes furnishing all plant, labor, equipment, tools and materials, which are not

furnished by the Owner and performing all operations required to complete the Work

satisfactorily, in place, as specified and as indicated on the Drawings.

DESCRIPTIONS

A. Measurement of an item of work will be by the unit indicated in the Bid.

B. Final payment quantities shall be determined from the record drawings. The record

drawing lengths, dimensions, quantities, etc. shall be determined by a survey after the

completion of all required work. Said survey shall conform to Section 01 71 23.16. The

precision of final payment quantities shall match the precision shown for that item in the

Bid.

C. Payment will include all necessary and incidental related work not specified to be

included in any other item of work listed in the Bid.

D. Unless otherwise stated in individual sections of the Specifications or in the Bid, no

separate payment will be made for any item of work, materials, parts, equipment,

supplies or related items required to perform and complete the work. The costs for all

such items required shall be included in the price bid for item of which it is a part.

E. Payment will be made by extending unit prices multiplied by quantities provided and

then summing the extended prices to reflect actual work. Such price and payment shall

constitute full compensation to the Contractor for furnishing all plant, labor, equipment,

tools and materials not furnished by the Owner and for performing all operations required

to provide to the Owner the entire Project, complete in place, as specified and as

indicated on the Drawings.

Measurement and Payment Gwinnett County Department of Water Resources


NONPAYMENT FOR REJECTED OR UNUSED PRODUCTS

A. Payment will not be made for the following:

Loading, hauling, and disposing of rejected material.

Quantities of material wasted or disposed of in manner not called for under Contract

Documents.

Rejected loads of material, including material rejected after it has been placed by

reason of failure of Contractor to conform to provisions of Contract Documents.

Material not unloaded from transporting vehicle.

Material and equipment not properly stored.

Defective Work not accepted by Owner.

Material remaining on hand after completion of Work.

PARTIAL PAYMENT OF STORED MATERIALS AND EQUIPMENT

A. Partial Payment: No partial payments will be made for materials and equipment

delivered or stored unless Shop Drawings or preliminary operation and maintenance

manuals are acceptable to Engineer.

B. Final Payment: Will be made only for products incorporated in Work; remaining

products, for which partial payments have been made, shall revert to Contractor unless

otherwise agreed, and partial payments made for those items will be deducted from final

payment.

BID ITEMS

A. Bid Prices included on the Bid Form shall be full compensation for all materials, labor,

equipment, tools, construction equipment and machinery, heat, utilities, transportation,

taxes, overhead, markup, incidentals and services necessary for the execution and

completion of the Work in the Contract Documents to be performed under this Contract.

For the Work described, the allowance and unit price, actual used and installed quantities

of each bid item shall be measured in the field and certified by the Engineer and/or

Owner upon completion of construction in the manner set forth for each item in this and

other sections of the Specifications. Payment for all items listed on the Bid Form will

constitute full compensation for all Work shown and specified to be performed.

B. The following Items 1.1 through 1.18 comprise the Base Bid Total as listed on the Bid

Form.

Item No. 1.1 – Mobilization/Demobilization (5% Maximum)

Description: Preconstruction costs of preparatory work and operations and removal

of equipment and surplus materials from the project site. Includes premiums for

bonds and insurance, preconstruction photos, mobilizing and demobilizing

equipment and materials to and from the project site, as-built records,

Unit of Measurement: Lump Sum where total amount bid shall be no greater than

five (5) percent of the sum of all other bid items of all schedules.

Payment: Per Section 01 71 13, Mobilization.



Item No. 1.2 – Site Improvements

Description: Cost for site improvements as indicated in the drawings and

specifications. Includes asphalt repaving, curb and gutter restoration, site drainage

improvements, erosion & control measures, and permanent seeding.

Unit of Measurement: Lump Sum

Item No. 1.3 – Civil/Mechanical Demolition

Description: Cost for demolition, removal, and proper disposal of all items shown

in the civil/mechanical sheets. Includes four (4) existing submersible wastewater

pumps (2 wet well and 2 dry pit) and associated piping, valves, and supports;

existing pump pedestals, existing hatches, and old chemical storage system

currently not in use.

Unit of Measurement: Lump Sum.

Item No. 1.4 – Bypass Pumping

Description: Cost for providing bypass pumping of the Brooks Road station.

Includes pumps, piping, appurtenances, 24hr monitoring, and all other items

needed to bypass and monitor the bypass system during the bypass duration as

outlined in Specification 33 01 30.74.


Item No. 1.5 – Furnishing New Pumps

Description: Cost for supply of six (6) new submersible wastewater pumps and

appurtenances as specified in Section 43 21 39.


Item No. 1.6 – Installing New Pumps

Description: Cost for installation of six (6) new submersible wastewater pumps and

appurtenances. Includes three (3) wet well pumps and three (3) dry pit with

associated piping, valves, and supports. Cost to include start-up & testing as

specified.


Item No. 1.7 – Furnishing New Channel Grinder

Description: Cost for supply of one (1) new channel grinder and appurtenances as

specified in Section 46 24 33.


Item No. 1.8 – Installing New Channel Grinder

Description: Cost for installation of one (1) new channel grinder and

appurtenances. Cost to include start-up & testing as specified.


Item No. 1.9 – Access Hatches

Description: Cost for supply and replacement of access hatches over the wet well

and dry well. Includes three (3) Type A hatches, six (6) Type B hatches, six (6)

Type C hatches, and six (6) Type D hatches as shown in the structural drawings.

Unit of Measurement: per each hatch, type.

Item No. 1.10 – Roof Extension Over Monorail Hoist

Description: Cost for supply and installation of roof over the monorail hoist area,

including coating of monorail.




Item No. 1.11 – Pumps Service Platforms

Description: Cost for supply of material and installation of three (3) new pump

service platforms in the dry well. Includes platform structural system, ladders,

railings, and davit hoists.


Item No. 1.12 – New Emergency Generator

Description: Cost for supply and installation of a new emergency generator.

Includes emergency generator, secondary containment area, and associated access

platforms and grading.


Item No. 1.13 – Electrical Demolition

Description: Cost for demolition and removal of all items shown in the electrical

sheets. Includes existing MCCs, switchgears, transformers, control panels,

grounding system, and conduits.


Item No. 1.14 – Electrical improvements

Description: Cost for supply and installation of all items covered in the electrical

sheets and specifications. Includes new MCCs, switchgears, transformers, control

panels, grounding system, and conduits.


Item No. 1.15 – Instrumentation & Control improvements

Description: Cost for supply and installation of all items covered in the

Instrumentation & Controls sheets and specifications. Includes supply of new

control panel, modifications to the existing control panels, system integration,

required PLC & HMI programming, and instruments replacement.


Item No. 1.16 – Service Power - Georgia Power Cost

Description: Cost for Utility Company to relocate the existing service power.

Includes Installation of new service power lines, two (2) 2500 kVA transformers,

connecting switchgear to two new transformers and existing transformer at Booster

Pump Station, and removal of decommissioned existing overhead lines and poles.


Item No. 1.17 – Service Power - Contractor Administration Cost

Description: Cost for Contractor administration, support and coordination, with

Georgia Power for relocation of service power at the pump station site.


C. The following Items 2.1 through 2.13 comprise the Owner Directed Unit Price Items as

listed on the Bid Form.

Unit Price Item No. 2.1 – Additional Bypass Pumping

Description: Cost for providing additional bypass pumping of the Brooks Road

station as directed by the Owner/Engineer. Includes pumps, piping, appurtenances,



24hr monitoring, and all other items needed to bypass and monitor the bypass

system during the bypass duration as outlined in Specification 33 01 30.74.

Unit of Measurement: Cost per week of bypass pumping.

Unit Price Item No. 2.2 – Non-Structural Concrete Repair

Description: Cost for non-structural concrete repairs including repair of wet well

concrete surface prior to recoating as directed by the Owner/Engineer.

Unit of Measurement: per Square feet of surface repaired.

Unit Price Item No. 2.3 – Pressure Injection, Concrete Cracks

Description: Cost for concrete cracks repair via pressure injection as directed by the

owner.

Unit of Measurement: Per Linear Feet of crack injected.

Unit Price Item No. 2.4 – Earthwork

Description: Cost for excavation, compaction, and removal of excess soil as

directed by the owner.

Unit of Measurement: Per Cubic Yard of earth moved.

Unit Price Item No. 2.5 – Flowable Fill

Description: Procurement and installation of flowable fill, where used as backfill or

other purposes as approved by the Owner. Work includes flowable fill material,

equipment, installation, and all required testing.

Unit of Measurement: per Cubic Yard installed.

Unit Price Item No. 2.6 – Cast-in-Place Concrete

Description: Cost for installation of a concrete wall footing and a retaining wall

less than 10ft high. Includes concrete, reinforcing, and forming needed for

complete installation.

Unit of Measurement: per Cubic Yard installed.

Unit Price Item No. 2.7 – Asphalt Pavement Milling and Repaving

Description: Cost for providing additional asphalt pavement milling and repaving

as directed by the Owner/Engineer.

Unit of Measurement: per Tons removal & installation.

Unit Price Item No. 2.8 – 3/4” Conduit and Wire Controls

Description: Cost for providing additional 3/4” conduit and wire for controls as

directed by the Owner/Engineer.

Unit of Measurement: Per Linear Feet of wire installed.

Unit Price Item No. 2.9 – 3/4” Conduit and 3#12 Wire

Description: Cost for providing additional 3/4” conduit and 3#12 wire as directed

by the Owner/Engineer.


Unit Price Item No. 2.10 – 3” RGS Conduit Exposed

Description: Cost for providing additional 3” RGS exposed conduit as directed by

the Owner/Engineer.

Unit of Measurement: Per Linear Feet of conduit installed.

Unit Price Item No. 2.11 – 4” RGS Conduit Exposed



Description: Cost for providing additional 4” RGS exposed conduit as directed by

the Owner/Engineer.

Unit of Measurement: Per Linear Feet of conduit installed.

Unit Price Item No. 2.12 – Emergency Lights Installed

Description: Cost for providing and installing additional emergency lights as

directed by the Owner/Engineer.

Unit of Measurement: Per Each light installed.

Unit Price Item No. 2.13 – Replace #16AWG 300 volt control wire

Description: Cost for providing and replacing additional Replace #16AWG 300

volt control wire as directed by the Owner/Engineer.


Unit Price Item No. 2.14 – Painting/coating exposed piping and steel surfaces

Description: Cost for providing and applying of paints/coatings to all existing and

proposed piping, valves and appurtenances, and steel surfaces as outlined in the

specifications and directed by the Owner/Engineer.

Unit of Measurement: Per Square Feet of paint/coating applied.

Unit Price Item No. 2.15 – Painting/coating of dry well concrete flooring

Description: Cost for providing and applying of paints/coatings to all concrete

flooring located in the dry well as outlined in the specifications and directed by the

Owner/Engineer.


Unit Price Item No. 2.16 – Painting/coating of electrical room concrete flooring


flooring located in the electrical room as outlined in the specifications and directed

by the Owner/Engineer.


Unit Price Item No. 2.17 – Painting/coating of concrete surfaces in the wet wells,

distribution chamber, and inlet chamber


surfaces located in the wet wells (WW-301, WW-302, WW-303), distribution

chamber (DC-200), and inlet chamber (IC-200) as outlined in the specifications

and directed by the Owner/Engineer.


PART 2 PRODUCTS (NOT USED)

PART 3 EXECUTION (NOT USED)

END OF SECTION

Gwinnett County Department of Water Resources Sanitary Utility Sewerage Valves


SECTION 33 34 16

SANITARY UTILITY SEWERAGE VALVES

PART 1 GENERAL

SUMMARY

A. Section Includes

Paragraph Title

1.2 Submittals

1.3 Quality Assurance

1.4 Delivery, Storage, and Handling

1.5 Warranty

2.1 General

2.2 Plug Valves

2.3 Ball Valves

2.4 Swing Check Valves

2.5 Sewage Air Release Valves

2.6 Extension Stems

2.7 Floor Stands

2.8 Valve Boxes

2.9 Manual Valve Operators

2.10 Electric Valve Actuators

2.11 Painting

2.12 Shop Testing

3.1 Installation

3.2 Shop and Field Testing

3.3 Valve Schedule

B. Scope

The work covered by this section includes furnishing all labor, materials, and

equipment required to install, test, and place into satisfactory operation all sewerage

valves and valve appurtenances as shown on the Drawings and/or specified herein.

SUBMITTALS

A. Action Submittals/Informational Submittals

Product Data

Product data sheets for each make and model. Indicate valve type number,

applicable tag number, and facility name/number or service where used.

Complete catalog information, descriptive literature, specifications, and

identification of materials of construction.

For each power actuator provided, manufacturer’s standard data sheet, with



application specific features and options clearly identified.

Sizing calculations for open-close/throttling and modulating valves.

Shop Drawings

Power and control wiring diagrams, including terminals and numbers.

Certificates

Manufacturer’s certificate of compliance.

Test and Evaluation Reports

Shop testing reports.

B. Closeout Submittals

Operation and Maintenance Data

Complete operation and maintenance manuals in accordance with Section 01 78 23

– Operating and Maintenance Data.

Warranty Documentation

Copy of manufacturer’s warranty on company letter specifically indicating

Owner’s warranty coverage.

QUALITY ASSURANCE

A. Qualifications

Manufacturers

Valves and equipment furnished under this section shall be the product of firms

regularly engaged in the design and manufacture of such equipment for a minimum

of five (5) years.

Installers/Applicators/Erectors

Have installation, calibration and testing of valves and equipment furnished under

this section performed by qualified, skilled technicians who are regularly engaged

in such activities involving systems of similar complexity, and who possess all

licenses and certificates required to perform such work.

B. Certifications

Furnish a written certification to the Engineer that all valves comply with all applicable

requirements of the governing AWWA standards specified herein.

DELIVERY, STORAGE, AND HANDLING

A. Delivery and Acceptance Requirements

Complete drain valves prior to delivery.

Protect ends of flanged and mechanical joint valves with full size wooden baffles

securely bolted to the valve ends. Make the baffle size at least equal to the outside

diameter of the flange.

B. Storage and Handling Requirements

Secure valves sized 24-inch and larger to wooden skids to facilitate handling and

storage.



WARRANTY

A. Manufacturer Warranty

Provide a warranty against defective or deficient equipment, workmanship and

materials for a period of five (5) years under normal use, operation and service.

Provide the warranty in printed form and apply to all similar units.

PART 2 PRODUCTS

GENERAL

A. Note that all valves, especially in the smaller sizes, are not necessarily shown completely

on the drawings, which are more or less schematic. However, Furnish and install all valves

indicated or required for proper operation of the equipment or services requiring such

valves.

B. Coordinate the location and position of valve operators. Clearly show the operator position

for each valve in the shop drawings.

C. Cast the word “OPEN”, an arrow indicating the direction to open, and flow direction

arrows on each valve body.

PLUG VALVES

A. General

Provide plug valves of the non-lubricated, resilient-seated, eccentric valve design,

conforming to the latest revision of ANSI/AWWA C517-05. Only use new materials.

Compose plug valve body and cover of cast iron in conformance with either ASTM

A126, Class B or ASTM A48, Grade 40. Provide mechanical joint ends conforming to

ANSI/AWWA C111/A21.11 on all buried valves, and Class 125 flat face flanged ends,

at a minimum, conforming to ANSI B16.1 or ANSI/AWWA C110/A21.10 on all

exposed valves measuring 4 inches in diameter and larger.

Minimum Valve Body Pressure Rating:

Valves measuring 3 inches to 12 inches in diameter: 175 psig.

Valves measuring 14 inches and greater in diameter: 150 psig.

For specific installation locations where the Total Dynamic Head (TDH) plus the

surge pressure exceeds the minimum pressure ratings above, provide Class 250 flat

face flanged ends and a 400 psi (for 3-inch to 12-inch valves) or 300 psi (for 14-

inch and larger valves) valve body. This shall include the following eccentric plug

valves:

EPV-303B, 24”, P-303B Discharge Plug Valve

For plug valves with 175 psi bodies and class 125 flat face flanges provide valve with

the following face to face dimensions.

Nominal Valve

Diameter (inches)

Lay Length

(inches)

3 8.0

4 9.0

6 10.5

8 11.5

10 13.0

12 14.0

B. Provide a solid one-piece casting plug composed of cast iron covered with a resilient



elastomer; two-piece plugs or plugs with internal cavities are NOT acceptable. Cover the

plug face with either EPDM or Neoprene; plug facings composed of natural rubber, Viton,

or Nitrile are NOT acceptable. Compose seats of either 95 percent nickel alloy or Type

316 stainless steel; seats composed of thermosetting epoxy or fusion bonded nylon are

NOT acceptable. Screwed-in seats are NOT acceptable.

C. Provide plug valves with a minimum % port area of 67% using the nominal pipe diameter

as the basis of measurement. Port area is the minimum cross-sectional area within the

valve perpendicular to the flow, expressed in square inches. Provide valves with a port

area exceeding the following minimum requirements:

Nominal Valve

Diameter (inches)

Minimum Port Area

(inches2)

3 5.75

4 11.00

6 24.50

8 42.50

10 64.50

12 89.50

14 118.50

16 158.50

18 193.50

20 238.50

24 309.50

30 494.50

36 712.50

D. Provide permanently lubricated, sleeve-type, sintered, oil-impregnated radial shaft bearings

composed of either Type 316 stainless steel in accordance with ASTM A743, Grade CF-

8M, or oil impregnated bronze in accordance with ASTM B127. Non-metallic radial thrust

bearings are NOT acceptable. Compose thrust bearing/washers of Type 316 stainless steel,

Teflon, Nylon 11, or Nylatron. Provide either the U-cup type or multiple V-ring type shaft

seals composed of either EPDM or Neoprene. Provide shaft seals that are self-adjusting

and repackable without removing the bonnet or actuator from the valve or removing the

valve from the line. Plug valve and connecting pipe shall have the capability to be pigged

without the use of special equipment.

E. Install plug valves and operators according to the manufacturer’s recommendations for

conveying fluids with high solids concentrations. For horizontal installations, install plug

valves so that the plug face is pointing upwards when the valve is open and so that the plug

face is facing the pump when the valve is closed. For vertical installations, install plug

valves so the plug face is pointing to the side when the valve is open and so that the plug

face is pointing upwards when the valve is closed. For plug valves installed in vaults or

below grade, install all plug valves horizontally with right angle operators pointing up to

allow operation from grade.

F. Provide manual lever operators on above-ground valves 6 inches in diameter and smaller,

unless otherwise specified or noted on the Drawings. Provide manual hand wheel operated,

through totally enclosed worm gear actuators on above ground valves 8-inches in diameter

and larger, unless otherwise specified or shown on the Drawings. Equip manual operators

for plug valves mounted above 6 feet from the operating floor with worm gear actuators,

chain wheel, and operating chain. Provide all buried valves with totally enclosed worm

gear actuators, 2-inch square AWWA operating nuts, and valve boxes. Provide all valves

with mechanical travel stops for the open and closed positions, which provide 90 degree

rotation from fully open to fully shut. Design gear actuators to produce the required



operating torque with a maximum rim pull of 80 pounds on a hand wheel/chain wheel and

with a maximum input of 150 foot-pounds on 2-inch operating nuts. Design actuator

components between the input and the open and closed position stops to withstand, without

damage, a rim pull of 200 pounds for hand wheels/chain wheels and an input torque of 300

foot-pounds for 2-inch operating nuts.

G. Directly cast or provide valves with corrosion-resistant nameplate stating, at a minimum,

the valve serial number, manufacturer, size, maximum shutoff pressure, and design

pressure rating. Clearly indicate the seat end on the valve exterior relative to half of the

body containing the plug/seat interface.

H. Submit certified Shop Drawings showing the principal dimensions, construction, and

materials used for all parts of the valve and actuator; clearly indicate the minimum

dimensions encountered within the valve port when the plug valve is fully open. Certify

that the plug valve(s) furnished are capable of operating in continuous duty service under

the pressure and flow conditions at each installation location. Prior to valve shipment,

provide written affidavit to the Engineer and Owner attesting the plug valve(s) furnished

comply with the requirements of the Contract Documents, comply with the applicable

portions of ANSI/AWWA C517-05, and match what is shown on the Shop Drawings.

Hydrostatically test each valve and test for bubble tightness at the factory after the operator

has been mounted and adjusted. Provided written certification of test conformance to

Engineer and Owner prior to valve shipment.

I. Shop paint all internal and external ferrous components and surfaces of the valves, with the

exception of stainless steel and finished or bearing surfaces, with two (2) coats (10 mils

minimum dry film thickness) of the manufacturer’s premium epoxy for corrosion

resistance. Repair damaged surfaces in accordance with the manufacturer’s

recommendations.

J. Manufactures

DeZurik.

Val-Matic.

Henry Pratt.

Approved equal.

BALL VALVES

A. Small Ball Valves (3” and Smaller)

General

Unless otherwise specified, provide quarter-turn type small ball valves with full

pipe size opening through the valve. Provide valves suitable for a differential

working pressure in either direction of not less than 400 PSI.

Manufacturers

Apollo 70-100 Series.

Approved equal.

Construction

Unless otherwise specified or required, small ball valves shall have brass body,

self-aligning Type 316 stainless steel ball, blow-out proof Type 316 stainless steel

stem, reinforced Teflon seats and seals, plastic-coated Type 304 stainless steel

handle, and threaded ends per ANSI B2.1.

B. Large Ball Valves (4” and Larger)



General

Provide metal to metal seated ball valves with flanged ends, drilled to the

applicable ANSI B16.1 standard Class 125/150, as required. Valve shall have a

clear unobstructed waterway, which will result in no significant head loss, when

the valve is in the full open position.

The valve shall be drop tight and meet or exceed the AWWA C-507-99 inspection

and testing standard. The valve shall be single seated, as required and rated at 150

psi.

Manufactures

Henry Pratt Company.

APCO Willamette.

Approved equal.

Elements

Body

Construct body of ductile iron ASTM A536 GR 65-45-12 having an inlet and

outlet flanged waterway equal to the required valve size. Use flat-faced

flanges machined parallel to each other to within .005 inch. Provide valve

body with both a drain and vent hole drilled and tapped.

Bearings: Bronze, installed in each half of the valve body accurately located in

the center of the housing to receive the trunnion bearings on the ball and place

the ball in the central position.

Bearing Load: Maximum of 2000 lb/sq. inch at 250 psi differential pressure.

Body Seat: Monel, electronically fused to the base metal, then accurately

machined to form the seating seal, or other C507-99 approved materials. The

body seat shall not protrude into the waterway.

Ball

Provide a ductile iron ASTM A536 GR 65-45-12 ball with integrally cast

trunnions which will be bronze-bushed. One trunnion holds the operating shaft

which passes through a packing seal area and connects to the actuator. To

prevent leakage around the shaft, the chevron packing is installed to form a

seal.

Ball Seat: Type 300 series stainless steel. Pressure assisted design. Fully

adjustable and replaceable in the field without removing the valve from the

line. Use an offset on the body and ball so that the seats will only be in contact

at the actual point of closing. Connect the seat to the ball by means of a

stainless steel mounting ring that is securely attached and pinned into position

after the correct setting has been attained. Do not use seats threaded directly

on to the ball.

The ball seat shall be located at the top, when the valve is in the open position.

Actuator

Provide valve actuators conforming to the operating requirements of AWWA

Standard C507-99. Design actuators to hold the valve in any intermediate

position between full open and fully closed without creeping or fluttering.

Where indicated, provide electric valve actuators meeting the requirements of

this specification.



Materials

Ball and Body Trunnion Bearings: Bronze of dissimilar hardness as per AWWA

C507-99 standard to prevent galling or binding. Self-lubricating teflon reinforced

are also acceptable.

Shafts: ASTM A564 Type 630, H1150 (17-4PH) stainless steel.

Valve Testing: Subject all ball valves to hydrostatic, shop leakage and

performance tests as specified in AWWA Standard C507-99. Maximum seat

leakage allowance of 1fl. oz. per diameter inch per hour as per AWWA C507-99 at

the operating pressures indicated in the Valve Schedule.

Internal Valve Painting: Shop paint all internal ductile iron surfaces, except

finished or bearing surfaces, with two coats of asphalt varnish conforming to

Federal Specification TT-C-494, and AWWA C550.

External Valve Painting: Shop paint all exterior steel or cast or ductile iron

surfaces of each valve, except finished or bearing surfaces, with one or more coats

of Alkyd primer. For buried service valves, two coats of asphalt varnish per

Federal Specification TT-C-494.

Service

Provide ball valves suitable for low pressure service while maintaining AWWA

leakage limits. Available seating pressure may range as shown in the Valve

Schedule at the end of this section depending on the operating status of the

associated pump station and the valve must remain leak tight. On initial pump

start-up and shut down, the valve may experience pressures up to the high

pressures indicated in the schedule prior to opening and closing and shall maintain

AWWA leakage standards.

Certification

Conduct factory testing to certify the valve meets the AWWA leakage standards at

the design operating pressures listed in the Valve Schedule. Video tape the testing

with a copy provided to the Engineer and Owner. Prior to the valve being shipped

to the project site, provide a signed certification from the manufacturer stating the

valve meets the AWWA leakage requirements.

SWING CHECK VALVES

A. Provide bottom mounted buffer, swing check valves in sanitary piping that are tight seating,

cushioned in operation, suitable for operation in either horizontal or vertical piping, and

conform to AWWA C508.

B. Provide flush and drain holes in the body.

C. Provide a bronze seat that is locked in place with stainless steel lock screws. Make the seat

field replaceable without the use of special tools.

D. Provide a one-piece stainless steel shaft that extends through both sides of the body with a

lever and weight mounted on each side.

E. Provide a ductile iron disc, utilizing a double clevis connected to a ductile iron disc arm.

Provide a replaceable Buna-N disc seat for water tight shut-off. Suspend the disc arm

assembly from the stainless steel shaft.

F. Provide an oil controlled bottom mounted buffer to permit free open and positive non-slam

control closure of the disc. The oil hydraulic buffer shall make contact with the disc during

the last 10% of closure to instantly control the valve disc until shut-off in a manner to

prevent slam and water hammer. Provide external adjustment on the buffer so the last 10%

of closure can be controlled to suit operating conditions.



G. Materials of Construction

Body/Cover: ASTM A126, Grade B, cast iron or ASTM A536, ductile iron.

Disc arm/Disc: ASTM A536, ductile iron.

Seat: ASTM B148 aluminum bronze.

Shaft: ASTM A582, T303 stainless steel.

Disc Seat: Buna-N.

Buffer Cylinder: Steel, per NFPA Standards.

Buffer Rod: ASTM A582, T303 stainless steel.

H. Manufacturers

DeZurik (APCO).

GA Industries.

Crispin.

Approved equal.

SEWAGE AIR RELEASE VALVES

A. Manufacturers

Vent-O-Mat Series RGX.

Vent-Tech.

A.R.I.

Approved equal.

B. Materials

Provide Air Release and Vacuum Relief Valves consisting of a compact tubular all

stainless steel fabricated body, hollow direct acting float, and solid large orifice float in

H.D.P.E.- stainless steel nozzle and woven dirt inhibitor screen, nitrile rubber seals and

natural rubber seat.

Include an integral anti-surge orifice mechanism, which operates automatically to limit

surge pressure rise or shock induced by closure to less than 2 times the valve rated

working pressure. Provide an intake orifice area equal to the nominal size of the valve

(i.e., a 6” valve shall have a 6” intake orifice).

Provide large orifice sealing with the flat face of the control float seating against a

nitrile rubber “O” ring housed in a dovetail groove circumferentially surrounding the

orifice. Control discharge of pressurized air by the seating and unseating of a small

orifice nozzle on a natural rubber seal affixed into the control float. Prevent damage to

the rubber seal using a flat seating land surrounding the orifice.

The valve construction shall be proportioned with regard to material strength

characteristics, so that deformation, leaking or damage of any kind does not occur by

submission to twice the designed working pressure. Provide flanged ends conforming

ANSI Class 250 or ANSI Class 300 Standards for the valve inlet connection. Fasten

flanged ends with ASTM A193, Grade B8M, 316 stainless steel, heavy hex bolts and

ASTM A194, Grade 8M, 316 stainless steel, heavy hex nuts inserted for alignment to

the specified size of, nuts, washers, and gaskets.

C. Operation



Prior to the ingress of liquid into the valve chamber, as when the pipeline is being

filled, and when sewage/effluent approach velocities are relative to a transient pressure

rise, on valve closure, of < 2-times valve rated pressure, vent air through the large

orifice.

At higher sewage/effluent velocities, which have a potential to induce transient

pressure rises greater than 2-times valve rated pressure on valve closure the

automatically discharge air/gas through the anti-shock orifice and reduce

sewage/effluent approach velocity, so that on closure a maximum transient pressure

rise of less than 2-times valve rated pressure is realized.

Valves shall not exhibit leaks or weeping of liquid past the large orifice seal at

operating pressures of 7.3 psi to twice (2) the rated working pressure.

When the valve is closed, discharge accumulated air/gas through the small orifice at

any pressures within a specified design range, 7.3 psi to 250 psi. No leakage is allowed

in the absence of air.

Valves shall react immediately to pipeline drainage or liquid column separation by the

full opening of the large orifice so as to allow unobstructed air intake at the lowest

possible negative internal pipeline pressure.

EXTENSION STEMS

A. Provide solid steel extension stems not smaller than the stem of the valve. Connect

extension stems to the valve by a flexible socket coupling. All couplings shall be pinned,

keyed, or socket type.

B. Extend extension stems for buried service valves to within 6” of the top of the valve box or

floor box. Provide spacers which will center the stem in the valve box. Provide a standard

2” nut on the top of the extension stem.

C. Provide stem guides that are bronze-bushed, cast iron construction adjustable in two

directions. Install stem guides so the unsupported length of the extension stem does not

exceed 10 feet or an L/r of 200.

FLOOR STANDS

A. Provide heavy-pattern type floorstands constructed of cast iron or steel with a height of

approximately 36 inches. Provide an integral bottom flange suitable for bolting to a

concrete floor.

B. Furnish floorstands for manually operated non-rising stem valves with a slot-type position

indicator in the floorstand body. Provide a removable stem cover with slot type position

indicator for floorstands for rising stem valves. Stem covers shall consist of a galvanized,

slotted steel pipe attached to the top of the floorstand with a pointer riding up and down in

the slot. Mark the open and closed points on the pipe cover.

C. Provide a bronze operating nut supported by tapered, grease-lubricated roller or ball

bearings on floorstands for rising stem valves. Provide positive mechanical seals on the

operating nut where it passes through the floorstand housing to retain lubricant and exclude

dirt. Provide a lubricating fitting for lubricating bearings.

D. Provide handwheels with a minimum diameter of 14 inches and shall be designed to seat or

unseat the valve at the maximum differential with not greater than a 40-pound tangential

pull on the handwheel rim. Cast an arrow and the word "OPEN" on the handwheel in

raised letters.

E. Provide a conspicuous, permanently attached nameplate showing the valve manufacturer's

name, valve size, model designation, serial number, and any other pertinent information on

the floorstand. Fabricate the nameplate of corrosion resisting metal with raised or stamped



lettering and contrasting background.

F. Set floorstands vertical and plumb with the valve operating stem for free operation without

binding or distortion. Shim and grout floorstand in place as required for proper installation.

G. Following manufacture, interior and exterior, non-machined, nonbearing ferrous floorstand

surfaces shall be blast-cleaned and painted at the factory with 1 coat of zinc chromate

primer conforming to Federal Specification TT-P-645 and 1 coat of compatible alkyd

enamel. Protect interior surfaces of floorstands for the life of the unit with a minimum of 3

coats of an approved paint.

VALVE BOXES

A. Provide all buried valves with 3-piece, cast iron, extension sleeve type valve boxes suitable

for the depth of cover as shown on the Drawings.

B. Material Characteristics

Minimum Diameter: 5 inches.

Minimum Wall Thickness: 3/16” at any point.

C. Cast thereon an appropriate name designating the service for which the valve is intended on

the cover (“W” for water, “S” for sanitary).

D. When installed within a roadway, provide deep locking type covers.

E. Heavily coat all parts of valve boxes, bases, and covers with a suitable bituminous finish.

F. Set valves and valve boxes plumb. Place each valve box directly over the valve it serves

with the top of the box flush with the finished grade.

MANUAL VALVE OPERATORS

A. Unless otherwise shown or specified, furnish plug valves with manual operators as follows:

Plug valves 8” and smaller that are installed above grade and less than 7 feet above the

working surface: Lever operator.

Plug valves greater than 8” that are installed above grade and less than 7 feet above the

working surface: Rotary operator with handwheel.

Plug valves located more than 7 feet above the working surface: Rotary operator with

chainwheel.

Plug valves 8” and smaller that are installed for buried service: 2” operating nut,

extension stem, and valve box.

Plug valves greater than 8” that are installed for buried service: Rotary operator with

extension stem, 2” operating nut, and valve box.

B. Operating Nuts for Buried Valves: Standard 2” square nuts conforming to AWWA C500.

Furnish extension stems, valve boxes, and stem guides where shown, specified, or required

for proper operation.

C. Hand Lever Operators: Heavy-duty cast iron bracket, cast iron latching lever, and self-

lubricating bushings, capable of securing the valve in any position. Install lever operators

so that the lever is parallel with the axis of the pipe in which the valve is installed when the

valve is fully open.

D. Rotary Manual Operators for Aboveground Service: Worm gear or traveling nut type with

a heavy-duty, weatherproof cast iron or steel housing with gasketed, removable cover.

Equip with a mechanical dial or slot type position indicator and suitable hand wheel.



Provide totally enclosed and sealed manual operators to prevent the entrance of rain, dirt,

and corrosive atmospheres. Provide traveling nut operators with a grease lubricated alloy

steel screw stem, brass nut, and self-lubricating bronze bushings. Provide worm gear

operators with hardened, grease-lubricated alloy steel worms and bronze worm gears.

Provide bronze or stainless steel exterior bolts and fasteners for corrosion resistance. The

valve shall open with counterclockwise rotation of the handwheel.

E. Rotary Manual Operators for Buried Service: Conform with the paragraph above except,

provide totally enclosed and completely sealed operator to prevent the entrance of water

and dirt. Coat buried operators with a bituminous coating. Capable of withstanding 300

foot-pounds of torque on the operating nut or hand wheel. Provide a corrosion resistant,

dial type valve position indicator at the operating nut on the extension stem of the buried

operators to provide a remote indication of valve position.

F. Chain Wheel Operators: Heavy cast iron construction equipped with chain guide and

looped, flexible, operating chain. Provide galvanized or cadmium plated chain that extends

to with 48-inches of the floor.

G. Provide manual rotary and lever operators capable of seating or unseating the valve disc

under the most adverse conditions in the particular application with no more than an 80-

pound pull on the handwheel or lever. Provide valve operators capable of holding the valve

in any position between fully open and fully closed without creeping or fluttering. Provide

operators with adjustable, mechanical, stop-limiting devices to prevent over-travel of the

valve disc in the open and closed positions. Comply with all applicable requirements of

AWWA C504.

H. Coordinate the location of valve operators. Clearly show operator locations for each valve

on the shop drawings.

PAINTING

A. Shop paint all internal cast or ductile iron surfaces, except finished or bearing surfaces,

with two coats of asphalt varnish conforming to Federal Specification TT-C-494.

B. Shop paint all exterior steel or cast or ductile iron surfaces of each valve, except finished or

bearing surfaces, in accordance with Section 09 91 00 – Painting.

C. Field prime and paint all exposed valves in accordance with the requirements of Section 09

91 00 – Painting.

SHOP TESTING

A. Subject all ball valves to hydrostatic, shop leakage and performance tests as specified in

AWWA Standard C507.

B. Subject plug valves and all other valves to hydrostatic, shop leakage and performance tests

at two times the rated pressure of the valve. During the hydrostatic test, there shall be no

leakage through the metal, the end joints, or the shaft stem seal, nor shall any part be

permanently deformed. Leakage shall not exceed that permitted by ANSI B16.104, Class

IV, for metal-seated valves and Class VI for resiliently seated valves.

PART 3 EXECUTION

INSTALLATION

A. Install all valves and appurtenances in strict conformance with the drawings and

manufacturer’s instructions.

B. Install valves in such a way that operators and packing are easily accessible. Install valves

with field replaceable seats with sufficient clearance to permit removal of valve bonnet and



stem without removing valve from the line.

SHOP AND FIELD TESTING

A. Provide certified factory testing for all components of the valve and operator system. Shop

test valves and operators in accordance with the requirements in the latest revision of

AWWA C500, including performance tests, leakage test, hydrostatic tests, and proof-of-

design tests. Submit certified copies of the reports covering the test for acceptance by the

Engineer.

B. Provide shop testing for the operators consisting of a complete functional check of each

unit. Correct any deficiencies found in shop testing prior to shipment. Submit written

certification that shop tests for the electrical system and all controls were successfully

conducted and that these components provide the functions specified and required for

proper operation of the valve operator system.

C. Conduct field tests to check and adjust system components, and to test and adjust operation

of the overall system. Conduct preliminary field tests prior to start-up with final field tests

conducted during start-up. Have the factory service representative assist during all field

testing and prepare a written report describing test methods, and changes made during the

testing, and summarizing test results. Have the service representative certify proper

operation of the valve operator system upon successful completion of the final acceptance

field testing.

D. Following installation, test all valves under the anticipated operating conditions.

Demonstrate the ability of the valves to operate properly without leakage, binding, sticking,

fluttering, or excessive operating torque to the satisfaction of the Engineer. Adjust and/or

replace any valve as necessary to assure satisfactory operation.

E. Conduct preliminary and final field tests at a time approved by the Engineer and Owner.

The Engineer and/or Owner shall witness all field testing.

F. Pay all costs in connection with field testing of equipment such as energy, light, lubricants,

water, instruments, labor, equipment, temporary facilities for test purposes, etc. The

Contractor shall be fully responsible for the proper operation of equipment during tests and

instruction periods and shall neither have nor make any claim for damage which may occur

to equipment prior to the time when the Owner formally takes over the operation thereof.

G. Conduct preliminary field tests prior to start-up and shall include a functional check of the

entire valve operator system and all system components. Demonstrate that the valve

operator system performs according to specifications and that all equipment, valves,

controls, alarms, interlocks, etc., function properly during the preliminary field tests. The

preliminary field test report must be approved by the Engineer prior to conducting final

field acceptance tests. Based on results of preliminary field tests, make any adjustments

required to settings, etc., to achieve the required valve closing time and operation specified

or otherwise directed by the Engineer.

H. Conduct final field acceptance tests simultaneously with the start-up and field testing of the

pumps, air compressors, process air blowers, etc. Conduct field tests for the full range of

operating modes and conditions specified and as directed by the Engineer. Test each of the

valves at minimum, maximum, and normal head/flow conditions, and under all specified

conditions of opening and closing. Check performance of pneumatic valves and

compressed air system under normal operating conditions and during simulated power

failures.

I. Include optimization of opening and closing times of the valves during field testing.

Provide the means for accurate measurement of pipeline pressures as directed by the

Engineer. Adjust valve opening and closing times based on process requirements to



optimize operation of the valves. Final valve opening and closing times as determined by

field tests shall be approved by the Engineer prior to final acceptance of the system.

VALVE SCHEDULE

A. See Construction plan set sheet G-003 for project valve schedule.

END OF SECTION



THIS PAGE INTENTIONALLY LEFT BLANK

Gwinnett County Department of Water Resources Submersible Pumps


SECTION 43 21 39

SUBMERSIBLE PUMPS

PART 1 GENERAL

SUMMARY

A. Section Includes

Paragraph Title

1.2 Administrative Requirements

1.3 Submittals



1.6 Field Conditions

1.7 Warranty

2.1 Equipment

2.2 Electrical and Control Requirements

2.3 Accessories

2.4 Source Quality Control

3.1 Installation

3.2 Field Quality Control

3.3 Adjusting

B. Scope

Furnish, install, test, and place in satisfactory operation heavy-duty, electric,

submersible, non-clog, centrifugal pumps at the locations shown on the Drawings in

compliance with the Specifications.

ADMINISTRATIVE REQUIREMENTS

A. Coordination

The Contract Documents are intended to describe a pump installation for the specified

purpose, complete and ready to be placed into service at the levels of performance

indicated in the Drawings and outlined herein. By offering this service to the Owner,

Contractor affirms that they are fully knowledgeable regarding the required methods

and materials, and are capable of performing such installation. The omission of

specific details and / or steps from the Drawings or Specifications, required to perform

this installation shall not relieve the Contractor of their sole responsibility for this end

result, nor shall such omissions be grounds for requests for additional compensation.

Coordinate with other manufacturers and suppliers to provide all details and

appurtenances necessary to properly install, adjust, and place in satisfactory operation a

complete working unit.



SUBMITTALS


Shop Drawings

Submit the following items with the Shop Drawings in accordance with, or in

addition to, the requirements specified in Section 01 33 23 – Shop Drawings,

Product Data, and Samples and Section 01 60 00 – General Equipment

Stipulations:

Pump performance curves at rated speed and reduced speed (if reduced speeds

are specified).

Indicate flow, head, efficiency, brake horsepower, NPSHr, and minimum

submergence.

Include limits (minimum and maximum flows) for stable operation without

cavitation, overheating, recirculation, or excessive vibration.

General cutaway sections, materials, dimension of shaft projections, shaft and

keyway dimensions, shaft diameter, dimension between bearings, general

dimensions of pump, suction head bolt orientation, and anchor bolt locations

and forces.

Dimensioned installation drawings.

Detailed description of construction, including a parts list with materials of

construction and metallurgy with ASTM designations.

Details of shaft sealing system.

AISI grades of stainless steel for casing and impeller wear rings.

Details of guide rail system, including pump manufacturer’s recommended

locations for intermediate and upper guide rail supports and mounting

requirements.

Functional description of internal and external instrumentation and controls,

including a list of parameters monitored, controlled, or alarmed.

Control panel elevation drawings showing fabrication and placement of

operator interface devices and associated elements.

Motor performance chart showing curves for torque, current, power factor,

input/output power, and efficiency and data on starting and no-load

characteristics.

Product data sheets for power and control cables, including length of cables.

Manufacturer Reports

Submit a certified report prepared by the manufacturer’s technical representative

certifying satisfactory installation, operation, and in-service placement of pumps.



Submit Operating and Maintenance Manuals in accordance with Section 01 78 23 –

Operating and Maintenance Data.




Include the manufacturer’s warranty in the compiled warranty submittal of all

manufacturers’ warranties in accordance with Section 01 78 33 – Warranties and

Bonds.

C. Maintenance Material Submittals

Spare Parts

Include manufacturer’s information for the spare parts specified herein with the

Shop Drawing submittal.

Tools

Include manufacturer’s information for the special tools and supplies specified

herein with the Shop Drawing submittal.

QUALITY ASSURANCE

A. Qualifications

Manufacturers

Furnish all pumps from a single manufacturer.



Ship components containing bearings with lubricant on all bearings.

Deliver all components to site in manufacturer’s shipping crates or boxes.

Deliver to site undamaged.


Store above ground, covered, and on platforms, skids, or other supports.

Protect from corrosion and mechanical damage.

Protect electrical components from condensation.

Ship power and control cables with securely-attached caps on cable ends to prevent

moisture wicking into cable during storage.

Store with lubricant on all bearings.

Handle all components in such a manner to prevent damage during unloading and

installation.

Follow manufacturer’s instructions regarding lifting and setting.

FIELD CONDITIONS

A. Ambient Conditions

Equipment Installation Location: A wet well (Stage 1 pumps) and a below-grade vault

that is subject to flooding (Stage 2 pumps).

Atmospheric condensing conditions are common throughout the year.



PART 2 PRODUCTS

EQUIPMENT

A. Manufacturers

Manufacturer List

Flygt by Xylem, Inc.

Approved Equal.

Substitution Limitations

The naming of a manufacturer in this Section is not an indication that the

manufacturer’s standard equipment is acceptable in lieu of the specified component

features. Naming is only an indication that the manufacturer may have the

capability of engineering and supplying a system as specified.

B. Performance/Design Criteria

Pump Schedule:

Number of Units 6

Designation/Tag Numbers P-301A, P-301B,

P-302A, P-302B,

P-303A, P-303B

Minimum Suction Diameter (inches) 14

Minimum Discharge Diameter (inches) 12

Liquid Pumped Municipal Raw Sewage

Temperature of Liquid Pumped Ambient

Suction Condition Flooded

Drive Type Constant Speed

Maximum Size of Solids

(Spherical Diameter) (inches) 3

Minimum Stable Continuous Flow

(gallons/minute) 3,750

Design Condition #1 #2 #3

Pump Capacity (gallons/minute) 4,900 7,000 8,400

Total Dynamic Head (TDH) (feet) 180 154 135

Best Efficiency Point (percent) 80.4

NPSHr (feet) 22

Operators

Operate each pump using the pump HAND-OFF-AUTO (H-O-A) selector switch

at the local control panel.



Controls

Pump H-O-A Selector Switch in HAND Position: Pump continuously operates

unless automatically stopped by the machine protection devices (high temperature,

seal failure, etc.).

Pump H-O-A Selector Switch in OFF Position: Pump does not operate.

Pump H-O-A Selector Switch in AUTO Position: Pump is controlled

automatically by the Main Control Panel (MCP) as described in Division 40 –

Process Integration.

C. Materials

General

Provide the most efficient pump available at the desired design point as

recommended by the manufacturer.

Capable of handling raw, unscreened sewage and wastewater and fully-guaranteed

for this use.

Suitable for continuous or intermittent operation.

Bottom suction, centerline discharge construction.

Stage 1 pumps shall be supplied with a foot-mounted discharge connection elbow

and integral sliding rail removal system as designed by the pump manufacturer to

match the pumps being furnished for wet well installation.

Stage 2 pumps shall be supplied with a support frame and suction elbow as

designed by the pump manufacturer to match the pumps being furnished for dry pit

installation. Suction elbow shall include an integral cleanout port (hand hole) to

allow the removal of any foreign material blocking or impeding pump

performance.

Protect all non-stainless steel metal surfaces coming in contact with the pumped

media, including the impeller and the interior of the casing, with a factory-applied

spray coating of pump manufacturer’s recommended modified acrylic primer and

finish that is guaranteed to protect the pump from the pumped media.

Volute Casing

Close-grained cast iron conforming to ASTM A48, Class 30, 35, or 40.

Lifting Cover and Stator Housing: Same materials of construction as volute

casing.

Furnish ductile iron volute casing if recommended by pump manufacturer for

specified pressure rating.

A smooth surface devoid of blowholes, pits, burrs, and other casting irregularities.

Single-piece, non-concentric design.

Smooth fluid passages large enough at all points to pass any size solids which can

pass through the impeller.

Provide a cleanout port (hand hole) to allow the removal of any foreign material

blocking or impeding pump performance.

O-Rings

Machine all pump/motor unit mating surfaces where watertight sealing is required.

After machining, fit mating surfaces with round O-rings composed of Viton.

Fit O-rings so joint sealing is accomplished by metal-to-metal contact between

machined surfaces, resulting in controlled compression of the rubber O-rings in



two planes and O-ring contact on four sides without the requirement of a specific

bolt torque limit.

Not Acceptable nor Equal O-Ring Types include but are not limited to:

Rectangular cross-sectioned rubber or paper gaskets.

Gaskets that require specific torque limits to achieve compression.

Joint seals that require secondary sealing compounds, elliptical O-rings, grease,

or other devices.

Impeller

Abrasion resistant cast iron conforming to ASTM A532 IIIA.

Dynamically-balanced, single-vaned (smaller pumps) or multiple-vaned (larger

pumps), enclosed or semi-open, non-clog design.

Long throughlets without acute turns.

Capable of handling solids, fibrous materials, heavy sludge, and other matter found

in normal wastewater applications.

Capable of passing the maximum diameter of spherical solid previously

specified at a minimum.

Mechanically secured/keyed to the motor shaft and retained per manufacturer’s

recommendations utilizing machined stainless steel components.

Not Acceptable: Adhesive or friction-type fits.

Casing and Impeller Wear Ring System

Provide efficient sealing between the volute and suction inlet of the impeller.

Fit each pump with a stainless steel, Buna-N-coated steel or brass ring insert that is

drive-fitted to the volute inlet.

Fit each pump with a stainless steel impeller wear ring that is heat-shrink fitted

onto the suction inlet of the impeller.

Pump/Motor Shaft

AISI Type 329 or 400 Series stainless steel.

Solid and continuous

Pump Shaft: Extension of the motor shaft.

Not Acceptable: Using couplings to join the pump shaft and motor shaft.

Capable of safely transmitting the maximum torque developed by the drive unit.

Designed to provide a rigid support for the impeller and prevent excessive

vibration.

Suitably heat-treated, turned, ground, and polished over its entire length.

Shaft Seals

Provide each pump with a tandem mechanical shaft seal system consisting of two

totally independent seal assemblies.

Provide seals in an oil lubricant reservoir that hydrodynamically lubricates the

lapped seal faces at a constant rate during operation.

Design lubricant chamber to prevent overfilling and to provide lubricant

expansion capacity.



Provide drain and inspection plugs, with positive anti-leak seals, that are

easily accessible from the outside of the pump.

Seal Lubricant: FDA-approved and non-toxic.

Not Acceptable: Relying upon the pumped media to lubricate the seal

system

Lower (Primary) Seal Unit

Located between the pump and the lubricant chamber.

Contains one stationary ring and one positively-driven, rotating, industrial

duty, corrosion-resistant ring.

Stationary Seal Ring: Tungsten carbide.

Rotating Seal Ring: Tungsten carbide or silicon carbide.

Capable of resisting the pump shutoff head.

Independent of the impeller hub.

Upper (Secondary) Seal Unit

Located between the lubricant chamber and the motor housing.

Contains one stationary ring and one positively-driven, rotating, industrial

duty, corrosion-resistant ring.

Stationary Seal Ring: Ceramic or carbon.

Rotating Seal Ring: Carbon or Ni-resist.

Provide each seal interface with its own spring system to hold it in contact.

Capable of operating in either a clockwise or counterclockwise direction of rotation

without damage or loss of seal.

Capable of running dry without damage.

If Both Seals Fail: Provide a port to immediately direct any fluid that enters the

stator housing to the float switch installed in the seal leakage chamber.

Not Acceptable: Intruding fluid coming into contact with the lower bearings.

Not Acceptable nor Equal Seal Types

Shaft seals without positively-driven rotating members.

Conventional double mechanical seals containing either a common single or

double spring acting between the upper and lower seal faces.

Cartridge-type systems.

Systems requiring a pressure differential to offset pressure and effect sealing.

Seals requiring either maintenance or adjustment.

Seals requiring an external source of cooling or lubrication water.

Bearings

A minimum of two (2) heavy-duty, sealed bearings on which pump shaft rotates.

Permanently-lubricated using high temperature grease.

Designed to carry all radial and axial thrust loads.

A minimum ABMA L10 life of 100,000 hours at all points along the usable portion

of the pump curve at maximum pump speed.



Motor Cooling Jacket

If specified herein or if recommended by manufacturer, provide each pump with an

integral, self-supplying cooling system that surrounds/encircles the stator housing

and is adequately designed to cool the motor without an external cooling source.

Cast iron

Circulate the cooling liquid, a portion of the pumpage, as needed through the

cooling system using the impeller back vanes.

Pass cooling liquid through a classifying labyrinth prior to entering the cooling

jacket.

Provide two cooling liquid supply pipes, one discharging low and one discharging

high within the jacket, to direct the cooling liquid to the jacket.

Provide an air evacuation tube to facilitate air removal from within the jacket.

Shield any piping internal to the cooling system from the cooling media flow to

allow for unobstructed circular flow within the jacket about the stator housing.

Provide two cooling liquid return ports.

Cooling System Internals: Non-clog by virtue of their dimensions.

Provide drilled and threaded provisions for external cooling and seal flushing or air

relief.

Equip cooling jacket with two flanged, gasketed, and bolted inspection ports,

minimum 4-inch diameter, located 180 degrees apart.

Capable of providing for continuous submerged or completely non-submerged

pump operation in liquid or in air having a temperature of up to 40 degrees Celsius

(104 degrees Fahrenheit) in accordance with NEMA standards. Restrictions

limiting the liquid or ambient temperatures to levels less than 40 degrees Celsius

(104 degrees Fahrenheit) are not acceptable.

Slide Rail Mounting System

Furnish and install a slide rail mounting system for the Stage 1 pumps in

compliance with the Specifications and as shown on the Drawings.

Meets or exceeds UL requirements for operation in a NEC Class I, Division 1,

Group D hazardous location.

Not Acceptable: Rail systems that require either personnel to enter the wet

well or piping disconnection to remove the pump from the wet well for

inspection or service.

Designed to allow for easy removal and reinstallation of pump for inspection or

service without needing to remove bolts, nuts, or other fasteners.

Provide each pump with a foot-mounted discharge connection elbow permanently

installed in the wet well along with the discharge piping.

Cast iron conforming to ASTM A48, Class 30 or 35.

Construct discharge connection elbow with a 125-pound ANSI standard flat-

faced flange in accordance with ANSI B16.1 or ANSI B16.5 dimensions.

Designed to automatically and firmly connect to pump when pump is lowered

into place in a simple downward motion.

Designed to tightly press against and bear the entire weight of the

pump/motor unit to provide positive sealing under all conditions.



Seal pump to discharge connection using a machined metal-to-metal

watertight contact.

Provide lower guide rail supports as integral parts of the discharge connection

elbow.

Intermediate and Upper Guide Rail Supports

AISI Type 316 stainless steel.

Located as recommended by the pump manufacturer.

Provide a sliding guide bracket as an integral part of the pump unit.

Design the entire sliding rail system to safely withstand all stresses imposed

thereon by vibration, torque, shock, and all possible direct and eccentric loads.

Not Acceptable: Sliding rail systems, including the discharge elbows, that

allow any portion of the pump/motor unit to directly bear on the wet well floor

or on a wet well floor-mounted stand.

Guide Rails

A minimum of two parallel guide rails that extend from the top of the pump

station to the wet well-mounted discharge connection.

Standard weight Type 316 stainless steel pipe at a minimum.

Adequately and conservatively sized by the pump manufacturer for their

intended use.

Capable of guiding the entire weight of the pump furnished.

Not Acceptable: Guide rails that support any portion of the pump weight.

All Metal-to-Metal Interfaces where Movement Might Occur: Non-sparking.

Anchoring and Lifting Components

Provide all anchor bolts, lifting bolts, eye lugs, lifting cable, etc. necessary for

complete installation and maintenance of each pump.

Type 316 stainless steel.

Adequately design components for their intended use(s).

Pump Nameplate

In addition to the requirements of Section 01 60 00 – General Equipment

Stipulations, include capacity (gallons/minute), rated TDH, speed, and efficiency at

the rated design point.

Hardware

All Exposed Nuts, Bolts, Washers, and Other Fastening Devices: AISI Type 316

stainless steel.

D. Finishes

Primer Materials

Clean and apply manufacturer’s recommended primer material to steel and cast

iron surfaces of pump in factory that is compatible with the finish material

specified in Section 09 91 00 – Painting for submerged wastewater service.

Shop Finishing Methods

Perform shop finishing methods on steel and cast iron surfaces of pump in

accordance with Section 09 91 00 – Painting for submerged wastewater service.



Finish Materials

Prepare and apply finish material to steel and cast iron surfaces of pump in field in


Field touch-up any damaged paint or coatings with compatible paint/coating

system in accordance with Section 09 91 00 – Painting.

ELECTRICAL AND CONTROL REQUIREMENTS

A. Provide all electrical components, wiring, and control devices necessary for a complete,

functional system in accordance with the appropriate Sections of Division 26 – Electrical

and Division 40 – Process Integration.

B. All Manufacturer-Furnished Electrical Appurtenances: Rated for installation in a NEC

Class I, Division 1, Group D hazardous location where such classified areas are indicated

on the Drawings or specified herein.

C. Power and Control Cables

Provided by the pump manufacturer in the required length based on their review of the

Electrical Drawings.

Provide cables with enough slack to be able to route and secure them out of the

way of any equipment in the wet well.

Located between the pump and the local disconnect switch, junction box, or control

panel terminal block as shown on the Drawings.

Provide silver-plated copper cable suitable for submersible pump applications.

Provide oil-resistant chloroprene rubber jacket around outside of cable.

Size according to NEC and ICEA standards.

Mine Safety and Health Administration-approved.

Not Allowable: Splicing cables unless specifically indicated on the Drawings.

Provide stainless steel strain relief connectors for all cables.

Wires for Thermal Switches and Moisture Sensor.

Option #1: Part of a composite motor cable.

Option #2: Separate from motor cable.

Provide adequate wire length to reach the control panel without splicing.

D. Cable Entry Water Seal

Designed to ensure a watertight and submersible seal without specific torque

requirements.

Provide either Type 1 or Type 2 cable entry water seal as follows:

Type 1

A single cylindrical elastomer grommet, flanked by stainless steel washers all

having a close tolerance fit against the cable outside diameter and the entry

inside diameter and compressed by the entry body containing a strain relief

function separate from the function of sealing the cable.

Designed to bear against a shoulder in the pump top.

Use a stator lead sealing gland or terminal board to separate the cable entry

junction chamber and the motor.



Use an elastomer compression O-ring to seal the motor from the junction

chamber containing the terminal board.

Connect the cable conductors to the stator leads using threaded, compressed-

type binding posts permanently affixed to the terminal board, resulting in a

leak-proof connection.

Equip each pump with a separate terminal board that totally isolates the

incoming power supply from the pump motor.

Type 2

A rubber grommet followed by epoxy.

For all power and control lead wires, provide a double seal where the wires

enter the top of the motor in such a manner to prevent cable-wicking from

occurring.

Accomplish the cable-to-motor connection in the field without soldering.

Remove a small section of insulation from each conductor to establish a

window area of bare wire.

Wire: Untwisted and surrounded by epoxy potting material.

Provide a cable strain relief mechanism as an integral part of the sealing

system.

Capable of withstanding an external pressure test of 1,200 psi and a cable

assembly pull test as required by UL.

Terminate power and control leads on a sealed terminal board.

Provide O-rings to seal the terminal board and its bronze lugs.

E. Electrical Requirements

Motors

Rating 460V, 3 phase, 60 Hz

Maximum Horsepower (hp) 385

Maximum Speed (revolutions/minute) 1,190

Insulation Class F

Explosion Proof Yes

Inverter Duty No

Service Factor 1.15

Resistance Temperature Detectors Yes

Cooling Jacket Yes

F. Motor

Provide each pump with a motor in conformance with the most recent versions of

applicable NEMA, IEEE, and ANSI standards for submersible service.

NEMA Design B.

Squirrel-cage induction-type.

Housed in an air-filled, watertight enclosure specifically designed for submersible

pump applications.

Housing: Close-grained cast iron conforming to ASTM A48, Class 30, 35, or 40.

Provided with moisture-resistant stator winding and stator leads.



Guaranteed for continuous operation without damage while non-submerged and

pumping media of up to 40 degrees Celsius (104 degrees Fahrenheit) with an even 80

degrees Celsius (176 degrees Fahrenheit) temperature rise.

Capable of continuous submergence without loss of watertight integrity to a depth of

65 feet.

Motors Greater than 25 hp: Capable of sustaining a minimum of fifteen (15) starts per

hour without overheating.

Rotor Bars and Short Circuit Rings: Cast aluminum.

Provided with pre-lubricated radial and thrust bearings which are designed to carry the

entire load which may be imposed upon the motor under all operating conditions.

Manufactured by pump manufacturer.

Provide adequate motor horsepower so that the pump is non-overloading throughout

the entire pump performance curve from shut-off through run-out.

Motor Stator-Embedded Temperature Switches

Equip each motor with three (3) normally-closed thermal switches in series, one

per phase, that are embedded in the stator end coils to monitor the temperature of

each phase winding.

Upon High Temperature: Switches open, activate an alarm, and stop the motor.

Use switches in conjunction with and supplemental to external motor overload

protection.

Connect switches to control panel.

Seal off junction chamber from stator housing for connection of power and control

cables.

Not Acceptable: Using wire nuts or crimping-type connectors.

Not Acceptable: Using bolts, pins, or other fastening devices that require penetration

of the stator housing.

G. Motor Protection Devices

Provide moisture detector probes in the oil seal chamber as required to validate

warranty. Provide manufacturer’s moisture detection relay compatible with the probes.

Install relay in location shown on the Drawings.

ACCESSORIES

A. Cable Grips

Provide cable grips for the submersible power and control cables for the pump motor.

Stainless steel wire braid sleeves with attachment loops or tails that connect to the cable

holders on the underside of the access hatch frame.

Hubbell Wiring Device-Kellems or approved equal.

B. Level Control System

Provide level control system in accordance with the requirements of Division 40 –

Process Integration.

If installed in a Classified Area: Intrinsically safe and suitable for use in a NEC Class

I, Division 1 or 2 hazardous location, as applicable.



C. Spare Parts

Furnish the following spare parts for each series of pumps in accordance with Section

01 60 00 – General Equipment Stipulations.

One (1) casing wear ring (if applicable).

One (1) impeller wear ring (if applicable).

One (1) set of bearings.

One (1) complete mechanical seal assembly (upper and lower).

Two (2) complete sets of gaskets and O-ring seals.

Properly pack in containers suitable for long-term storage.

Attach labels that clearly designate the contents and the piece(s) of equipment for

which they are intended.

Store all materials in a location as directed by the Owner.

Provide spare parts of the same type and quality as the original components in the

furnished pump package(s).

D. Special Tools and Supplies

Furnish all special tools necessary to operate, disassemble, service, repair, and adjust

the pump.

Furnish a one-year supply of all lubricating oils and greases as recommended by the

manufacturer.

SOURCE QUALITY CONTROL

A. Tests and Inspections

Perform shop testing in accordance with Section 01 60 00 – General Equipment

Stipulations, all applicable methods and standards of the American National Standard

for Centrifugal Pump Tests by the Hydraulic Institute, and the following additional

requirements:

Perform shop testing and inspection with Engineer or Owner present as witness.

Cost for the Engineer or Owner to witness the test will be covered by the Owner.

Submit testing procedure to Engineer/Owner for review and approval before

scheduling shop test.

Provide Engineer/Owner with a minimum of two weeks advance notice of the

scheduled test date.

Perform a natural frequency test.

Check impeller, motor rating, and electrical connections.

Conduct a motor and cable insulation test for moisture content or defective

insulation.

Prior to submergence, run pump dry to establish correct rotation and mechanical

integrity.

Run pump for 30 minutes submerged a minimum of six feet under water.

After the 30-minute submergence test, perform the insulation test again.

After the second insulation test, perform a certification test as follows:

Perform on each of the actual assembled pumps to be furnished.



Test pumps in the manufacturer’s facility in accordance with the latest test

code of the Hydraulic Institute Pump Test Acceptance Grade 1U to determine

head vs. capacity and power draw required.

Test Range: Shut-off to a minimum of 20 percent beyond the specified design

performance capacity

Tolerances: As specified by the Hydraulic Institute Standards Pump Test

Acceptance Grade 1U.

Generate a pump curve that shows actual flow, head, brake hp, and hydraulic

efficiency for each pump furnished.

Submit pump curves, each certified by a registered Professional Engineer, to

the Owner.

PART 3 EXECUTION

INSTALLATION

A. Special Techniques

Install the pump and accessories in accordance with the approved Shop Drawings and

the manufacturer’s printed instructions and recommendations.

Install guide rails plumb and parallel.

Prior to being cast into concrete, coat aluminum frames of access hatches in contact

with concrete with bituminous paint.

Install cable grips on the submersible cables and attach them to a stainless steel eyebolt

installed in the vertical face of the concrete under the access hatch. Loop the

submersible cable from the grips, under the roof, and up through the conduit to the

local control panel.

FIELD QUALITY CONTROL

A. Field Tests and Inspections

Perform field testing in accordance with Section 01 60 00 – General Equipment

Stipulations and the following additional requirements:

Removal and Reinstallation Test

Perform the removal and reinstallation test three (3) times for each pump

provided.

Completely remove the pump from the discharge elbow and through the access

hatch above.

Ensure adequate clearance and alignment of access hatch.

Ensure adequate installation and alignment of slide rail mounting system.

Reinstall the pump through the access hatch and onto the discharge elbow.

Ensure proper seating of the pump on the discharge elbow.

Final Acceptance Test

Demonstrate pumps are properly installed and are in proper alignment.



Demonstrate the pumps operate without overheating or overloading of any

parts and without objectionable vibration.

Vibration: Within the limits of the Hydraulic Institute Standards or the

pump manufacturer’s limits, if more stringent.

Demonstrate the pumps meet the specified Design Conditions.

Check each pump at maximum speed for a minimum of four (4) points on

the pump curve for capacity, TDH, and amperage.

Not Acceptable: Exceeding the rated current on the motor nameplate

at any point.

Motors Rated Less than 5 hp: Only test pump for overcurrent when

overheating or other malfunction is evident during general testing.

Furnish all labor, materials, and test apparatus necessary for conducting the field

tests at no additional cost to the Owner.

B. Manufacturer Services

Furnish the field services of a qualified, trained, and competent manufacturer’s

technical representative who has knowledge of the proper installation, operation, and

maintenance of the pumps in accordance with Section 01 43 33 – Manufacturer’s

Services. Include the following site visits for each series of pumps:

Service Number of Trips Number of Days/Trip

Installation and Testing 2 1

Startup and Training 1 2

Services After Startup 1 1

Manufacturer’s Technical Representative’s Minimum Responsibilities

Inspect the completed installation of each pump for conformance with

manufacturer’s recommended installation requirements. At a minimum, include

the following:

Check seal chamber oil level and lubrication of seals.

Check proper rotation.

Check power supply voltage.

Megger for insulation breaks or moisture.

Measure motor no-load current.

Manually trip sensors and check complete cycle of control operation.

Supervise field test of each pump.

Supervise initial startup and operation of each pump.

Instruct Owner’s personnel in proper operation and maintenance of pump.

Prepare and certify field inspection report.

ADJUSTING

A. After installation, align and adjust the pump and accessories as required for proper

operation and proper alignment.

END OF SECTION

Gwinnett County Department of Water Resources Open-Channel Grinders


SECTION 46 24 33

OPEN-CHANNEL GRINDERS

PART 1 GENERAL

SUMMARY

A. Section Includes

Paragraph Title

1.2 Administrative Requirements

1.3 Submittals



1.6 Field Conditions

1.7 Warranty

2.1 Equipment

2.2 Electrical and Control Requirements

2.3 Accessories

2.4 Source Quality Control

3.1 Installation

3.2 Field Quality Control

3.3 Adjusting

B. Scope

Furnish, install, test, and place in satisfactory operation open-channel grinders capable

of grinding plastics, rags, scum, screenings, and other matter commonly found in raw

wastewater in compliance with the Specifications and as shown on the Drawings.

Furnish open-channel grinders with all necessary accessories.

ADMINISTRATIVE REQUIREMENTS

A. Coordination

The Contract Documents are intended to describe a grinder installation for the specified

purpose, complete and ready to be placed into service at the levels of performance

indicated in the Drawings and outlined herein. By offering this service to the Owner,

Contractor affirms that they are fully knowledgeable regarding the required methods

and materials, and are capable of performing such installation. The omission of

specific details and / or steps from the Drawings or Specifications, required to perform

this installation shall not relieve the Contractor of their sole responsibility for this end

result, nor shall such omissions be grounds for requests for additional compensation.

Coordinate and provide all details, accessories, special tools, spare parts, mountings,

anchor bolts, and other appurtenances as specified and as required to properly install,

adjust, test, and place in satisfactory operation a complete and operating grinder.



SUBMITTALS


Shop Drawings

Submit the following items with the Shop Drawings in accordance with, or in

addition to, the requirements specified in Section 01 33 23 – Shop Drawings,

product Data, and Samples and Section 01 60 00 – General Equipment

Stipulations:

Dimensioned installation drawings

Detailed description of construction, including a parts list with materials of

construction and metallurgy with ASTM designations

Functional description of internal and external instrumentation and controls,

including a list of parameters monitored, controlled, or alarmed

Control panel elevation drawings showing fabrication and placement of

operator interface devices and associated elements

A motor performance chart showing curves for torque, current, power factor,

input/output power, and efficiency and data on starting and no-load

characteristics

Manufacturer Reports

Submit a certified report prepared by the manufacturer’s technical representative

certifying satisfactory installation, operation, and in-service placement of grinders.



Submit Operating and Maintenance Manuals in accordance with Section 01 78 23 –

Operating and Maintenance Data.


Include the grinder manufacturer’s warranty in the compiled warranty submittal of

all manufacturers’ warranties in accordance with Section 01 78 33 – Warranties

and Bonds.

C. Maintenance Material Submittals

Spare Parts

Include manufacturer’s information for the spare parts specified herein with the

Shop Drawing submittal.

Tools

Include manufacturer’s information for the special tools and supplies specified

herein with the Shop Drawing submittal.

QUALITY ASSURANCE

A. Qualifications

Manufacturers

Furnish all grinders from a single manufacturer.





Ship components containing bearings with lubricant on all bearings.

Deliver all components to site in manufacturer’s shipping crates or boxes.

Deliver to site undamaged.


Store above ground, covered, and on platforms, skids, or other supports.

Protect from corrosion and mechanical damage.

Protect electrical components from condensation.

Ship power and control cables with securely-attached caps on cable ends to prevent

moisture wicking into cable during storage.

Store with lubricant on all bearings.

Handle all components in such a manner to prevent damage during unloading and

installation.

Follow manufacturer’s instructions regarding lifting and setting.

FIELD CONDITIONS

A. Ambient Conditions

Equipment Installation Location: A below-grade vault that is subject to flooding.

Atmospheric condensing conditions are common throughout the year.

PART 2 PRODUCTS

EQUIPMENT

A. Manufacturers

Manufacturer List

Channel Monster by JWC Environmental

Approved equal

Substitution Limitations

The naming of a manufacturer in this Section is not an indication that the

manufacturer’s standard equipment is acceptable in lieu of the specified component

features. Naming is only an indication that the manufacturer may have the

capability of engineering and supplying a system as specified.

B. Performance/Design Criteria

Grinder Schedule:

Number of Units 1

Designation/Tag Numbers CG-201

Design Flow Rate per Grinder

(million gallons/day) 28.9



Top of Channel Slab Elevation (feet) 830.00*

Bottom of Channel Elevation (feet) 796.00*

Channel Depth (feet) 32.67*

Channel Width (feet) 8.00’*

Channel Length (feet)Grinder Wall Opening

Invert Elevation (feet)

802.00*

Grinder Wall Opening Width (feet) 2.50’*

Grinder Wall Opening Height (feet) 4.00’*

* Field-verify the criteria listed herein.

C. Operation

Operators

Operate each grinder using the grinder HAND-OFF-AUTO (H-O-A) selector

switch at each local control panel and the E-stop button located by the grinder.

Controls

Grinder H-O-A Selector Switch and Screen Drum H-O-A Selector Switches (if

Applicable) All in HAND Position: Grinder and screen drums continuously

operates unless manually stopped by the E-stop button or automatically stopped by

the machine protection devices (equipment jammed, high temperature, etc.)

Grinder H-O-A Selector Switch in OFF Position: Grinder does not operate

A Screen Drum H-O-A Selector Switch (if Applicable) in OFF Position:

Respective screen drum does not operate

E-Stop Button is Actuated

Removes the control voltage from the motor starter coils and stops grinder and

screen drums.

Grinder and screen drums cannot be restarted (automatically or manually) until

the E-stop button is reset.

Grinder H-O-A Selector Switch in AUTO Position: Grinder starts when one of the

following events occurs:

High wastewater level is detected by the level control system mounted

upstream of each grinder

When the high level contact closes, the timed cleaning cycle is overridden

and the grinder continuously runs until the high level contact reopens.

When high level contact reopens, grinder control reverts back to a time-

based automatic operation.

Provide an adjustable time delay to prevent excessive toggling between

modes.

The time period from the last cleaning cycle has expired. Use two different

settings for the timed cleaning function as follows:

Time Setting #1: Duration of cleaning cycle (how long the grinder runs

when the frequency timer is actuated)

Time Setting #2: Duration between cleaning cycles



Use the pump station control system to adjust the duration of either time

setting.

A Screen Drum H-O-A Selector Switch (if Applicable) in AUTO Position:

Respective screen drum starts and stops as controlled by the grinder operation

Operation Sequences

Jam Sensing

Control system monitors the current in one phase of each motor to detect for a

high current condition, which indicates a motor is jammed.

If phase current reaches an adjustable set point (factory set at

approximately 80 percent of locked rotor), motor stops.

When jam is sensed in either the grinder motor or a screen drum motor, control

system automatically stops the motor momentarily and then restarts it in the

opposite direction of rotation to attempt to clear the obstruction.

Grinder Motor

If Jam is Cleared: Control system returns grinder to normal operation.

If Jam Still Exists: Control system attempts two (2) additional grinder

reversals (3 times total) within 10 seconds before stopping the grinder

motor and activating the Grinder JAM indicating light and relay.

When a grinder jam condition occurs, both screen drum motors stop until

the grinder jam cycle is completed.

If, at any time during the grinder jam condition, the grinder runs for more

than 60 seconds without experiencing a high current condition, the reversal

counter resets.

Screen Drum Motors (if Applicable)

If Jam is Cleared: Control system returns screen drums to normal

operation

If Jam Still Exists: Control system attempts one (1) additional screen drum

reversal (2 times total) within 30 seconds before stopping the jammed

screen drum motor and activating the Grinder JAM indicating light and

relay

When a screen drum jam condition occurs, grinder motor and non-jammed

screen drum motor continue to operate.

Immersible Motor High Temperature

Disables the grinder motor and screen drum motors to prevent thermal damage

to the motor

Activates the appropriate high temperature light and common trouble alarm

After temperature switch resets, grinder and screen drums automatically

resumes operation in the current mode (HAND or AUTO).

Immersible Motor Seal Failure

Grinder and screen drums continue to run in the current mode of operation

(HAND or AUTO).

Activates the appropriate seal failure light and common trouble alarm.

Power Failure



When Grinder and Screen Drums are Running: Operation resumes when

power is restored

When Grinder and Screen Drums are in a Fail Condition: Fail indicator

reactivates when power is restored

Provide logic to maintain all alarm and fail condition indication and contact

outputs, including the common FAIL contact output, until the Owner manually

presses the RESET pushbutton at a local control panel to reset the alarm and fail

conditions for that grinder.

D. Materials

General

Capable of handling raw, unscreened sewage and wastewater and fully-guaranteed

for this use.

Mount grinders vertically across the full width of the channel and perpendicular to

the direction of flow to grind the solids contained in the raw wastewater stream.

Capable of grinding solids to a uniform fineness while allowing particles to be

retained in the influent stream and maintaining minimum headloss.

Modular construction with a frame mounted to the channel

Design frame to separately receive the screen and grinder assembly.

Installation Location Classifications

Below Top of Channel: NEC Class I, Division 1, Group D hazardous location

Above Top of Channel: NEC Class I, Division 2, Group D hazardous location

Capable of passing the specified peak flow with the wet well at the specified

maximum wastewater level without overtopping

Designed to reduce solids normally found in raw sewage flows to a uniform size by

the use of rotating screen drums that capture solids and transports them to the

vertical central cutter stack.

Cleaned of solids by the rotation of the screen drums and the intermeshing of

the grinder stack along the screen with minimal clearance between them

Driven Shaft: Operates at approximately 2/3 the speed of the drive shaft

Suitable for continuous use

Capable of processing wet or dry materials

Constructed of compatible, durable materials that resist pitting and corrosion

All Structural Steel: Minimum thickness of 1/4-inch and coated as specified herein

Design grinder for drop-in installation on the channel frame

Frame

Channel Frame

Designed for simple bolt-in installation

Fabricated from Type 316 stainless steel

Not Acceptable: Bolting the grinder to the frame



Grinder End Housings

Cast from ductile iron conforming to ASTM A536

Equipped with a cast-in-place flow deflector designed to protect the bushings

while guiding particles directly into the cutting area

Side Rails

Cast from ductile iron conforming to ASTM A536

Inside Profile: Concave with an adjustable ultra high molecular weight plastic

extension strip to minimize clearance at the front of the screen drums

Maximum Clearance: 1/16-inch from the major diameter of the screen

drums

Top and Bottom Frames

Top Frame: Fabricated from ductile iron conforming to ASTM A536

Bottom Frame: Fabricated from hot-rolled steel plates conforming to ASTM

A36

Screening Drums

Type: Coil drum for high flow rates and low head loss

Orientation: Vertical

Clear Opening: 1/2-inch

Fabricated from 1/2-inch diameter Type 304 stainless steel rods

Drum Support Skeleton

Type 304 stainless steel

Include hubs for mounting of drum stub shafts

Vertical Members: Provide support for the coil

Center Support Ring(s): Provide additional support to the center of the drums

Drum Stub Shafts

Type 304 stainless steel

Minimum Tensile Strength: 95,000 psi

Minimum Shaft Diameter: 1-7/8 inch

Grinder Assembly

Mount grinder between two heavy-duty rotary tables which are centrally supported

on oversized bearings.

Support rotary tables using ball bearings with severe-duty mechanical seals.

Shafts

Hexagonal AISI 4140 heat-treated alloy steel

Minimum Tensile Strength: 149,000 psi

Use a two-piece coupling to directly-couple the high-speed shaft of the grinder and

motor with each other.

Shaft Gears

Use two heavy-duty spur gears to drive the two counter-rotating shafts.



Rockwell “C” Hardness: 28 to 32

Cutters and Spacers

AR500 abrasion-resistant alloy steel

Surface ground for uniformity

Through-hardened to a Rockwell “C” hardness of 50 to 52

Inside Configuration: Hexagonal so as to fit the shafts with a maximum total

clearance of 0.015-inch across the flats to assure positive drive and increasing

and compression strength of the spacers.

Cutters

Designed with bi-directional leading cutting edges on each tooth so as to

cut equally well in either direction without removing the cutter from the

grinder.

Maximum Tooth Height: 1/2 inch above the root diameter.

Minimum Tooth Force Exerted: 450 pounds per hp continuously and

1,095 pounds per hp at momentary load peaks at the tooth tip.

Root Diameter Overlap: Between 1/16 inch and 1/4 inch to maintain the

best possible cutting efficiency while incurring the least amount of

frictional losses.

Provide a cutter stack compression adjustment screw accessed through the top

frame of the unit.

Bearings and Seals

Housed in replaceable wear sleeves that support and align the bearings and

seals.

Protect the bearings using a combination of a labyrinth path seal device and

end face mechanical seals.

Bearings

Use to bear the radial and axial loads of the grinder shafts.

Oversized, ball-type, deep-groove, double-seal, Conrad-type.

A minimum L10 rating life of 150,000 hours per ABMA 9.

Seals

Face Materials: Tungsten carbide to tungsten carbide, at a minimum.

Mechanical Seals: Rated at 90 psi continuous duty by the seal

manufacturer.

Not Acceptable: Seals requiring an external flush or any type of

lubrication.

Positively lock each seal element to its corresponding rotating or static cartridge

element.

O-Rings: Buna-N

Intermediate Shaft Support

Provide an intermediate shaft support in the center of the cutter stack for all

grinders.



Grinders with 40-inch or 50-inch Cutter Stacks: Two intermediate shaft

supports

Grinders with 60-inch Cutter Stacks: Three intermediate shaft supports

Provide additional support for heavier than normal influent grinder demand loads

and protection for the seal assemblies.

Made from a cast Type 303 stainless steel collar.

Provide with two bushings that act as bearings to allow free rotation of the shafts.

Speed Reducer

Grease-filled, planetary-type with a 500 percent shock load capacity.

Directly couple the input shaft of the reducer to the motors using a three-piece

coupling.

Directly couple the output shaft of the reducer to the grinder shaft or the screen

drum shafts using a two-piece coupling.

Designed for continuous service.

Load Classification: “Heavy Shock”

Gears: AGMA Class I with a minimum Rockwell “C” hardness of 60.

Case and Motor Mount: Cast iron.

Use anti-friction bearings throughout.

Seal shafts with shielded, spring-loaded, lip-type seals.

Motor Mount: Rabbeted, doweled, or sleeved so that automatic alignment is

maintained when bolted to the gearbox.

Lubrication: Splash-type with oil maintained in the housing.

Hardware

All Anchor Bolts, Washers, Clips, Clamps, and Fasteners: AISI Type 316 stainless

steel.

E. Finishes

Primer Materials

Clean and factory apply manufacturer’s recommended primer material to steel and

cast iron surfaces of grinder. Use materials specifically approved for wastewater

service and methods of application that comply with Section 09 91 00 – Painting

for submerged wastewater service.

Shop Finishing Methods

Perform shop finishing methods on steel and cast iron surfaces of grinder in


Finish Materials

Prepare and apply finish material to steel and cast iron surfaces of grinder in field

in accordance with Section 09 91 00 – Painting for submerged wastewater service.

Field touch-up any damaged paint or coatings with compatible paint/coating

system in accordance with Section 09 91 00 – Painting.

ELECTRICAL AND CONTROL REQUIREMENTS

A. Provide all electrical components, wiring, and control devices necessary for a complete,

functional system.



B. All Manufacturer-Furnished Electrical Appurtenances: Rated for installation in a NEC

Class I, Division 1, Group D hazardous location where such classified areas are indicated

on the Drawings or specified herein.

C. All Manufacturer-Furnished Conduit, Couplings, Fittings, and Fasteners: PVC-coated rigid

galvanized steel and liquid-tight, PVC-coated flexible metal conduit.

D. Electrical Requirements

Motors

Rating 460V, 3 phase, 60 Hz

Maximum Horsepower (hp) 1

Grinder Drive 10

Screen Drum Drive (each) 1

Maximum Speed (revolutions/minute) 1,800

Enclosure NEMA 4X

Service Factor 1.15

Space Heater No

Control Panels

NEMA Rating 4X

Materials of Construction Type 304 Stainless Steel

E. Power and Control Cables

Provided by the grinder manufacturer in the required length based on their review of the

Electrical Drawings.

Located between the grinder and the local disconnect switch, junction box, or control

panel as shown on the Drawings.

Provide special cable suitable for submersible service.

Provide Hypalon jacket around cable.

Size according to NEC and ICEA standards.

Provide stainless steel strain relief connectors for all cables.

Not Allowable: Splicing cables unless specifically indicated on the Drawings.

F. Motor

Provide each grinder with a motor in conformance with the most recent versions of

applicable NEMA, IEEE, and ANSI standards for submersible service.

NEMA Design B

Squirrel-cage induction-type.

Housed in an immersible enclosure.

Guaranteed for continuous operation without damage while non-submerged and

grinding under load.

Motors Greater than 25 hp: Capable of sustaining a minimum of fifteen (15) starts per

hour without overheating.

Nationally-known manufacturer.

Motor and Intermediate Castings: Cast iron conforming to ASTM A48, Class 25 at a

minimum.



Machine all mating surfaces where watertight sealing is required. After machining, fit

mating surfaces with round O-rings.

Seals

Provide each grinder with a tandem mechanical seal system.

Provide seals in an oil-filled chamber.

Lower Seal

Contains one stationary seal face and one positively-driven, rotating, lapped

seal face, both composed of tungsten carbide.

Upper Seal

Contains one stationary ring and one positively-driven, rotating ring.

Stationary Seal Ring: Tungsten carbide.

Rotating Seal Ring: Carbon or tungsten carbide.

Provide each seal interface with its own spring system to hold it in contact.

Bearings

Upper Bearings: Single row ball bearings.

Lower Bearings: Double row, angular contact ball bearings.

Permanently-lubricated.

A minimum L10 rating life of 100,000 hours per ABMA 9.

Motor Stator-Embedded Temperature Switches

Equip each motor with three (3) normally-closed thermal switches in series, one

per phase, that are embedded in the stator end coils to monitor the temperature of

each phase winding.

Upon High Temperature: Switches open, activate an alarm, and stop the motor.

Use switches in conjunction with and supplemental to external motor overload

protection.

Connect switches to control panels.

Seal off junction chamber from stator housing for connection of power and control

cables.

Not Acceptable: Using wire nuts or crimping-type connectors.

G. Motor Protection Devices

Provide moisture detector probes in the oil seal chamber as required to validate

warranty. Provide manufacturer’s moisture detection relay compatible with the probes.

Install relay in location shown on the Drawings.

H. Increase, as required, the minimum motor horsepower specified if recommended by the

grinder manufacturer to achieve the specified capacity. Contractor is responsible for all

costs associated with electrical changes for the increased horsepower.



ACCESSORIES

A. Control Panels

Provide an individual grinder manufacturer’s local control panel for each grinder

furnished.

Powered from a single 460 Volts AC, 3-phase source.

All Components: NEMA-rated and UL-listed or recognized.

Not Acceptable: IEC-rated devices.

Enclosure

Provide an enclosure for each local control panel in accordance with Section 40 95

16 – Instrument and Control Panels.

Minimum Metal Thickness: 14 gauge.

Provide a rubber-gasketed, hinged outer door with continuous stainless steel

hinge and stainless steel, butterfly twist-type latches.

Dead-front construction with an interior swing-out panel.

Provide a stainless steel or copper-free aluminum back panel with provisions to

mount control devices and a terminal strip for field connections.

Fit each control panel with a pad lockable latch kit.

Provide each local control panel with all required controls, auxiliary contacts, relays,

panels, transformers, motor starters, overload alarms, and other ancillary equipment,

including but not limited to, the following:

A single fused or circuit breaker-type, NEMA 4X, lockable main power disconnect

switch that de-energizes the control panel

Operable from outside each control panel or mounted in a separate NEMA 4X,

Type 316 stainless steel enclosure.

Mechanically-interlocked with enclosure door so that the main power must be

OFF before door can be opened.

Motor Starters

Full-voltage, combination-type, reversing, magnetic.

Minimum NEMA Size 1.

Equipped with overload relays, control power transformers, reset pushbuttons,

and circuit breaker through-the-panel operators for each motor.

Designed to be heaterless.

Provides phase loss protection, short circuit self-protection, and thermal

memory.

Self-powered solid-state overload.

Programmable Logic Controller

Provide a Programmable Logic Controller for each local control panel in

accordance with Section 40 94 43 – Programmable Logic Controller.

Provide the following data from the Programmable Logic Controller to the

pump station control system:

Grinder ON



Operating Mode (Timed or Level)

Common failure alarm contact

Provide the following discrete inputs to each local control panel:

E-stop Button

High Channel Level

Grinder Motor HIGH TEMPERATURE

Grinder Motor Seal FAIL

An integral, fused transformer providing 120 Volts AC control power

Sized for the anticipated loads from devices/controls.

Heater and thermostat for condensation protection.

A 24 Volts DC Programmable Logic Controller interposing relay.

Provide wiring inside panel in accordance with Division 26 – Electrical and

Division 40 – Process Integration.

Include the following controls and indicators mounted on the interior swing-out panel in

each local control panel:

One (1) H-O-A selector switch for the grinder, with control in AUTO mode by the

pump station control system, and one (1) Control Power ON/OFF selector switch.

Heavy-duty, oil-tight.

Rated for 600 Volts AC, 10 amps continuous.

Individual Pilot Lights

Push-to-test LED-type.

Alarm Indicating Lights

Grinder JAM

Grinder Motor HIGH TEMPERATURE

Grinder Motor MOISTURE

Status Indicating Lights

Power ON

Grinder RUN

Pilot Light Colors: In accordance with Section 40 95 16 – Instrument and

Control Panels.

Elapsed Time Meter

Six-digit, non-resettable, electromechanical, units in hours.

RESET Pushbutton

Heavy-duty, oil-tight.

Rated for 600 Volts AC, 10 amps continuous.

Manufacturer List for Selector Switches, Pilot Lights, and RESET Pushbutton.

Class 9001, Type K by Square D by Schneider Electric.

Equivalent by Alternative Manufacturer.



Provide a legend plate above each of the previously-listed interior panel-mounted

controls in accordance with 40 95 16 – Instrument and Control Panels.

B. E-Stop Button Station

Maintained-contact, push-pull, mushroom head button.

Mount in a NEMA 4X, Type 316 stainless steel enclosure adjacent to each grinder.

C. Cable Grips

Provide cable grips for the submersible power and control cables for the grinder motor.

Stainless steel wire braid sleeves with attachment loops or tails that connect to the cable

holders on the underside of the access hatch frame.

Hubbell Wiring Device-Kellems or approved equal.

D. Level Control System

Provide float switches or submersible pressure transducers as shown on the Drawings in

accordance with Division 40 – Process Integration.

If installed in a Classified Area: Intrinsically safe and suitable for use in a NEC Class I,

Division 1 or 2 hazardous location, as applicable.

E. Spare Parts

Furnish the following spare parts for each series of grinders in accordance with Section

01 60 00 – General Equipment Stipulations:

One (1) complete set of cutters

One (1) complete gasket set

Two (2) bearing/seal assemblies

One (1) motor starter with overload block

Five (5) spare fuses for each type and rating provided

Five (5) spare lamps for each type provided

Five (5) spare relays and relay sockets for each type provided.

Properly pack in containers suitable for long-term storage.

Attach labels that clearly designate the contents and the piece(s) of equipment for which

they are intended.

Store all materials in a location as directed by the Owner.

Provide spare parts of the same type and quality as the original components in the

furnished grinder package(s).

F. Special Tools and Supplies

Furnish all special tools necessary to disassemble, service, repair, and adjust the

grinder.

Furnish a one-year supply of all lubricating oils and greases as recommended by the

manufacturer.

SOURCE QUALITY CONTROL

A. Tests and Inspections

Perform shop testing in accordance with Section 01 60 00 – General Equipment

Stipulations and the following additional requirements.



PART 3 EXECUTION

INSTALLATION

A. Special Techniques

Install the grinder and accessories in accordance with the approved Shop Drawings and

the manufacturer’s printed instructions and recommendations.

Install the channel frames using stainless steel fasteners.

Grout the floor of the channel so it slopes up to the grinder frame at a 6:1 slope

(H:V).

Install guide rails plumb and parallel.

Prior to being cast into concrete, coat aluminum frames of access hatches in contact

with concrete with bituminous paint.

Install cable grips on the submersible cables and attach them to a stainless steel eyebolt

installed in the vertical face of the concrete under the access hatch. Loop the

submersible cable from the grips, under the roof, and up through the conduit to each

local control panel.

FIELD QUALITY CONTROL

A. Field Tests and Inspections

Perform field testing in accordance with Section 01 60 00 – General Equipment

Stipulations and the following additional requirements:

Test each grinder in the presence of the Owner and the manufacturer’s

representative to demonstrate that the grinder is capable of:

Continuously grinding materials likely to be encountered in service without

vibration, jamming, or overheating.

Satisfactorily performing its specified function.

Being easily removed and reinstalled within the channel.

Grinding Test

Grind materials typically contained in the wastewater stream (disposable

diapers, wood, etc.).

Examine fineness of grind and uniformity of resultant particle size.

Demonstrate control system’s performance and repeatability by intentionally

jamming the grinder to test the reversal function and alarm system.

Removal and Reinstallation Test

Completely remove the grinder from the channel and through the access hatch

above.

Ensure adequate clearance and alignment of access hatch.

Ensure adequate installation and alignment of grinder frame.

Reinstall the grinder through the access hatch and into the channel.

Ensure proper seating of the grinder in the channel.

Furnish all labor, materials, and test apparatus necessary for conducting the field

tests at no additional cost to the Owner.



B. Manufacturer Services

Furnish the field services of a qualified, trained, and competent manufacturer’s

technical representative who has knowledge of the proper installation, operation, and

maintenance of the grinders in accordance with Section 01 43 33 – Manufacturer’s

Services. Include the following site visits for each series of grinders:

Service Number of Trips Number of Days/Trip

Installation and Testing 1 1

Startup and Training 1 1

Services After Startup 1 1

Manufacturer’s Technical Representative’s Minimum Responsibilities

Inspect the completed installation of each grinder for conformance with

manufacturer’s recommended installation requirements.

Check seal chamber oil level and lubrication of seals.

Check proper rotation.

Check power supply voltage.

Megger for insulation breaks or moisture.

Measure motor no-load current.

Manually trip sensors and check complete cycle of control operation.

Supervise field test of each grinder.

Supervise initial startup and operation of each grinder.

Instruct Owner’s personnel in proper operation and maintenance of grinder.

Prepare and certify field inspection report.

ADJUSTING

A. After installation, align, balance, and adjust the grinder and accessories as required for

proper operation and proper alignment.

END OF SECTION

BL038-20

REVISED BID FORM

16

(This Bid Form is part of the Bid Documents) : BID NUMBER: BL038-20 BID DATE: May 5, 2020

SUBMITTAL DATE:

BY: (Bidder)

PROJECT DESCRIPTION: Brooks Road Pump Station Improvements THIS BID IS SUBMITTED TO: Gwinnett County, Georgia (hereinafter called Owner) acting

through its Board of County Commissioners 1. Undersigned Bidder offers and agrees to enter into Agreement with Owner, in

accordance with the instructions, requirements and forms included in Bid Document Package (including the NOTICE OF BID, Instructions to Bidders Package and Pre-Qualification Package [where applicable]), and to complete all Work for the Bid Price and within required calendar days, all in accordance with the Bid Document Package.

2. Bidder accepts terms and conditions contained in Bid Document Package including

without limitation those dealing with Owner's time for accepting Bid and disposition of Bid Security.

3. In submitting this Bid, Bidder makes representations required by Instructions to Bidders

and further warrants and represents:

a. Bidder has examined Bid Document Package, including NOTICE OF BID and Instructions to Bidders, and following addenda:

No. Dated No. Dated

No. Dated No. Dated

No. Dated No. Dated

No. Dated No. Dated

b. Bidder has examined site and locality where the Work is to be performed and

legal requirements (federal, state, and local laws, ordinances, rules, and regulations) and conditions affecting Work cost, difficulty, progress, or performance and has made independent investigations as Bidder deems necessary.

c. Bidder has carefully studied reports and drawings indicating subsurface

conditions and drawings depicting physical conditions as identified in General Conditions and accepts determination concerning technical data contained in reports and drawings on which Bidder is entitled to rely.

BL038-20

REVISED BID FORM

17

d. Bidder has obtained and carefully studied (or assumes responsibility for obtaining and carefully studying) examinations, investigations, explorations, tests, and studies (in addition to or to supplement those referred to in "c." above) pertaining to subsurface or physical conditions at site or otherwise affecting cost, progress, performance, or furnishing Work as Bidder considers necessary for performing or furnishing Work at Contract Price, within Contract Time, and in accordance with terms and conditions contained in Bid Document Package, including specifically provisions stated in General Conditions and no additional examinations, investigations, explorations, tests, reports, or similar information or data are or will be required by Bidder.

e. Bidder has reviewed and checked Plans and data shown or indicated on Bid

Document Package with respect to existing underground facilities at or contiguous to site and assumes responsibility for accurately locating underground facilities. No additional examinations, investigations, explorations, tests, reports, or similar information or data concerning underground facilities are or will be required by Bidder in order to perform and furnish Work at Contract Price, within Contract Time, and in accordance with terms and conditions contained in Bid Document Package, including specifically provisions stated in General Conditions.

f. Bidder has correlated results from observations, examinations, investigations,

explorations, tests, reports, and studies with terms and conditions contained in Bid Document Package.

g. Bidder has given Owner written notice concerning conflicts, errors, or

discrepancies discovered in Bid Document Package and written resolution by Owner is acceptable to Bidder.

h. This Bid is genuine and not made in interest of or for any undisclosed person,

firm, or corporation and is not submitted in conformity with any agreement or rules produced by any group, association, organization, or corporation; Bidder has not directly or indirectly induced or solicited any other Bidder to submit false or sham Bid; Bidder has not solicited or induced any person, firm, or corporation to refrain from bidding; and Bidder has not sought by collusion to obtain for itself any advantage over any other Bidder or over Owner.

i. Bidder should submit a projected Monthly Cash Flow projection with the bid. The

monthly projections should add up to the Bid Amount on the Bid Form.

BL038-20

REVISED BID FORM

18

4. Bidder submits the following lump sum/unit prices for the Brooks Road Pump Station Improvements identified in Bid Form as part of this Bid. Bidder submits the following lump sum/unit prices for the Brooks Road Pump Station Improvements identified in Bid Form as part of this Bid. Work included within each Bid Item is described in Section 01 22 15, Measurement and Payment. The bid schedule breakdown is provided to facilitate bid evaluations. The Bidder shall ensure that the Base Bid Lump Sum Items Total covers all work to be performed for this project as indicated in the Contract Documents.

BID SCHEDULE

Part 1 – Base Bid Lump Sum Items

Bid Item No.

Description Bid Price (Lump Sum)

1.1 Mobilization/Demobilization (5% Maximum) $

1.2 Site Improvements $

1.3 Civil/Mechanical Demolition $

1.4 Bypass Pumping $

1.5 Furnishing New Pumps $

1.6 Installing New Pumps $

1.7 Furnishing New Channel Grinder $

1.8 Installing New Channel Grinder $

1.9 Access Hatches $

1.10 Roof Extension Over Monorail Hoist $

1.11 Pumps Service Platforms $

1.12 New Emergency Generator $

1.13 Electrical Demolition $

1.14 Electrical Improvements $

1.15 Instrumentation & Control Improvements $

1.16 Service Power – Georgia Power Cost1 $0.00

1.17 Service Power – Contractor Administration Cost $

Part 1 – Base Bid Lump Sum Items Total (Items 1.1 to 1.17): $

Note: 1. The Bid Price for Bid Item No.1.17, Service Power – Georgia Power Cost, is $0.00

BL038-20

REVISED BID FORM

19

Part 2 – Owner Directed Unit Price Items

Bid Item

No. Quantity Unit Description Minimum

Unit Price

Contractor Unit

Price

Total Bid Price

2.1 4 WEEKS

Additional Bypass

Pumping

$31,750.00/W

EEK $ /WEEK $

2.2 10,000 SQ FT Non-Structural

Concrete Repair $20.00/SQ FT $ /SQ FT $

2.3 100 LF Pressure Injection,

Concrete Cracks $50.00/LF $ /LF $

2.4 80 CU YD Earthwork $60.00/CU

YD $ /CU YD $

2.5 40 CU YD Flowable Fill $200.00/CU

YD $ /CU YD $

2.6 20 CU YD Cast-in-Place Concrete $400.00/CU

YD $ /CU YD $

2.7 60 TONS Asphalt Pavement

Milling and Repaving $250.00/TON $ /TON $

2.8 500 LF 3/4” Conduit and Wire

Controls $10.50/ LF $ /LF $

2.9 250 LF 3/4” Conduit and 3#12

Wire $13.00/ LF $ /LF $

2.10 200 LF 3” RGS Conduit

Exposed $10.00/ LF $ /LF $

2.11 400 LF 4” RGS Conduit

Exposed $25.00/ LF $ /LF $

2.12 10 EA Emergency Lights

Installed $350.00/ EA $ /EA $

BL038-20

REVISED BID FORM

20

Bid Item

No. Quantity Unit Description Minimum

Unit Price

Contractor Unit

Price

Total Bid Price

2.13 5000 LF Replace #16AWG 300

volt control wire $1.50/ LF $ /LF $

2.14 2600 SF

Painting/coating

exposed piping and

steel surfaces

$10.00/SF $ /SF $

2.15 3300 SF Painting/coating of dry

well concrete flooring $4.00/SF $ /SF $

2.16 2800 SF

Painting/coating of

electrical room

concrete flooring

$4.00/SF $ /SF $

2.17 29000 SF

Painting/coating of

concrete surfaces in

the wet wells, (WW-

301, WW-302, WW-

303) distribution

chamber (DC-200),

and inlet chamber (IC-

200)

$25.00/SF $ /SF $

Part 2 – Unit Price Items Total (Items 2.1 to 2.17): $

TOTAL BID (Part 1 + Part 2): $

5. Major Equipment Items - All major equipment items included in the lump sum bid item shall be bid according to the following:

a. The Bidder must include in the lump sum cost the named Manufacturer/Supplier from the project specifications. If an acceptable deduct is provided for substitute equipment and the equipment is accepted by the OWNER, the amount of deduct shall be accounted for by a change order after award of the contract by the OWNER.

b. Should a Bidder fail to indicate which manufacturer or supplier his Base Bid is based on, or circles more than one listed manufacturer/supplier per item, the Bidder shall provide the first listed (“A”) manufacturer/supplier for his Bid for the amount included in the Total Base Bid at no increase in the Contract amount.

c. The Bidder may indicate a Substitute Manufacturer/Supplier by writing in the substitute and writing in the amount of deduct for the Substitute Manufacturer/Supplier. Should a write-in substitute be disallowed by the ENGINEER as “not equal” or “not desired,” then the Bidder shall supply the circled Manufacturer/Supplier. If no substitute is indicated, the Bidder must supply the circled item.

d. A substitute Manufacturer/Supplier will be deemed approved equal provided the proposed substitute is explicitly demonstrated by the Bidder to be equivalent to or better than the product named and described in the Specifications in form, function, performance, reliability, quality, and general configuration. Determination of equality in reference to the project design requirements will be made by the ENGINEER.

BL038-20

REVISED BID FORM

21

e. Changes by the Bidder to items listed in the Major Equipment Schedule will NOT be considered after receipt of Bids.

f. Design of this project is based upon the Manufacturer/Supplier's equipment noted as the (A) item in the Schedule. Should a Bidder propose furnishing another named or substitute Manufacturer/Supplier, he shall comply with the following:

i. In addition to the deduct (if any) offered, the Bidder SHALL REIMBURSE THE ENGINEER THROUGH THE OWNER FOR ANY ASSOCIATED REDESIGN AND/OR CONSTRUCTION DRAWINGS BY ANY DIMENSIONAL, MECHANICAL, ELECTRICAL, INSTRUMENTATION, STRUCTURAL, AND ARCHITECTURAL CHANGES AND/OR REQUIREMENTS FOR THE SUBSTITUTE’S USE. The Bidder, therefore, shall include in his/her bid for such substitute Manufacturer/Supplier all additional CONSTRUCTION cost (civil, mechanical, architectural, structural, electrical, instrumentation and engineering redesign cost) associated with that substitute equipment, material, or supplier. The bid for such substitute Manufacturer/Supplier shall also include the cost of any paid licenses necessary for the use of the equipment if required by the manufacturer.

ii. Reimbursement for engineering costs shall be based on the ENGINEER’S labor cost shall be as listed in the Supplementary Conditions.

g. In order that the OWNER may determine if the proposed NAMED (B, C, etc.) Manufacturer/Supplier be equal to the named (A) Manufacturer/Supplier, the information below must be submitted if requested by the OWNER for each NAMED Manufacturer/Supplier entered WITHIN 7 DAYS OF OWNER’S REQUEST. This request will only be made after receipt of Bid Form. This submittal requirement does not apply to an unnamed substitute Manufacturer/Supplier, the requirements for which are outlined later:

i. Dimensional and weight information on components and assemblies.

ii. Catalog information and cuts.

iii. List of requested exceptions to the Contract Documents.

iv. Any additional information requested by the ENGINEER.

h. In order that the ENGINEER may determine if the proposed, unnamed substitute write-in item shall be allowed, the information below shall be SUBMITTED WITH THIS BID FORM. This submittal is NOT required for a named substitute Manufacturer/Supplier listed as (B), (C), etc.

i. A list of any and all deviations from the technical requirements of the Contract Documents.

ii. Dimensional and weight information on components and assemblies.

iii. Catalog information and cuts.

iv. Manufacturer's specifications, including materials description and paint systems.

v. Performance data and pump curves, as applicable.

vi. Horsepower and electrical characteristics of all motors supplied.

BL038-20

REVISED BID FORM

22

vii. Outside utility requirements for each component, such as water, power, air, etc.

viii. Functional description of any package Instrumentation and control systems supplied.

ix. List of parameters monitored, controlled, or alarmed.

x. Addresses and phone numbers of nearest service center and listing of the manufacturers or manufacturers representatives' services available at this location.

xi. Addresses and phone numbers for the nearest parts warehouse capable of providing full parts replacement and/or repair service.

xii. A list of the three most recent installations where similar equipment by the manufacturer or manufacturers' representative is currently in service; include contact name, telephone number, mailing address, and the names of the ENGINEER, OWNER, and installation contractor; if three installations do not exist, the list shall include all that do exist, if any.

xiii. Description of structural, electrical, mechanical, and all other changes or modifications necessary to adapt the equipment or system to the arrangement shown and/or functions described on the drawings and in the Technical Specifications.

xiv. Any additional information requested by the ENGINEER.

xv. Additional space requirements and/or accessories.

xvi. An estimation of time of delivery.

BL038-20

REVISED BID FORM

23

Major Equipment Schedule

Section Number

Description Manufacturer/Supplier Amount of Deduct for

Substitute Manufacturer/Supplier

26 12 19 Three-Phase Transformers

A. Cooper Power Systems

B. ABB Substitute________________

$___________________

26 22 16 Low-Voltage Transformers

A. General Electric

B. Square D

C. Siemens Substitute________________

$___________________

26 29 13 Soft-Start Motor Controllers

A. Rockwell

B. Benshaw

C. Schneider Substitute________________

$___________________

26 32 13 Diesel Engine Generator Sets

A. Cummins-Onan

B. Kohler

C. Caterpillar Substitute________________

$___________________

33 34 16 Plug Valves A. DeZurik

B. Val-Matic

C. Henry Pratt Substitute________________

$___________________

33 34 16 Swing Check Valves A. DeZurik (APCO) B. GA Industries C. Crispin Substitute_______________

$___________________

BL038-20

REVISED BID FORM

24

33 34 16 Air Release Valves A. Vent-O-Mat Series RGX

B. Vent-Tech

C. A.R.I. Substitute_______________

$___________________

40 94 43 Programmable Logic Controller

A. Allen-Bradley

ControlLogix Substitute ________________

$___________________

43 21 39 Submersible Pumps A. Flygt by Xylem, Inc. Substitute ________________

$___________________

46 24 33 Open Channel Grinders

A. Channel Monster by JWC Environmental

Substitute ________________

$___________________