addendum #1 bl032-15

March 25, 2015

ADDENDUM #1

BL032-15 Crooked Creek Water Reclamation Facility Secondary Clarifiers #5 and #6 Rehabilitation

This addendum is being issued to answer questions received and provide clarification. C1. A Limited Lead-Based Paint Chip Survey was conducted on the Secondary Clarifiers #5 & #6 by S&ME.

Attached please find a copy of the Limited Lead-Based Paint Chip Survey for your information in preparing your bid. All work activities affecting lead-containing paint coated surfaces should be performed in accordance with OSHA 29 CFR 1926.62. Additionally, the construction and demolition waste generated by these work activities are also regulated and must be analyzed and disposed of pursuant to the requirements outlined in the Limited Lead-Based Paint Chip Survey.

Q1. What is the estimate for this project? A1. $3,000,000 to $4,000,000 Q2. As discussed at the pre-bid meeting, 145 days for the first clarifier to be substantially complete will be

impossible due to the shop drawing process and lead time for equipment fabrication. Please consider extending the first substantial completion date to 240 days.

A2. Substantial Completion of Clarifier #5 is 240 days after NTP Substantial Completion of Clarifier #6 is 300 days after NTP Final Completion of the Project is 330 after NTP Q3. Can ClearStream Environmental be approved as a Manufacturer for supplying the Secondary Clarifier

Mechanism (Suction Header/Manifold Type) listed in Section 44 41 24.03 for the Crooked Creek WRF Secondary Clarifiers No. 5&6 Rehabilitation Project?

A3. Please reference Section 01 25 00, 01 25 00 – 2, 1.05 for substitutions and product options. Q4. We request that we be added to the approved list of suppliers for these pumps for the upcoming bid for the

scum pumps at the Crooked Creek WRF. They are specified in Section 46 15 13. A4. Please reference Section 01 25 00, 01 25 00 – 2, 1.05 for substitutions and product options. Q5. After reviewing the Secondary Clarifiers Specification we noticed you have requested options for 304

stainless steel construction on several items in the clarifiers. We would request as a part of this option that Gwinnett County consider making the Center Drive unit Assembly (Section 2.07 H 3) in 304 stainless steel. This will give Gwinnett County an option to select the best and least maintenance material of construction of these clarifiers.

A5. Section 44 42 24.03 shall remain as currently specified. Q6. The bid form, Bid Item 1.1 says Exclusive of 44 42 24.03 paragraph 2.10. Bid Item 3.1 says inclusive of

44 42 24.03 Paragraph 2.20. Paragraph 2.10 defines the rake arms. 2.20 defines a bid alternate. Should Bid Item 1.1 refer to Paragraph

2.20 instead of 2.10. A6. Yes. Please see change under Volume 1 - Bidding and Contract Requirements in this addendum.

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Q7. We previously had requested if the Ovivo EquaFlo 360TM will be acceptable as an EDI. Right now, only the FEDWA and Dual Gate are allowed and they are patented by others. This was section 2.06 in the draft specification.

A7. Manufacturers will be required to demonstrate their proposed EDI performance by testing. Please see change under Volume 2 - Technical Specifications in this addendum.

Q8. The specification indicates that bridge is to be a “truss beam type” Section 2.08.B.1. So is it a truss or is it a

beam? 120’ diameter tanks will make these beams very large and heavy to span the distance and require a lot of 2 rail aluminum handrail. Typically when the specifications allow truss bridges then they also allow the truss members to be used as the handrail when they are 42” high.

A8. The bridge shall be a truss type with the truss located below the walkway and handrail provided as specified. Please see change under Volume 2 – Technical Specifications in this addendum.

Q9. The specification section 2.15.A Table indicate that each clarifier is to have two (2) control panels, a start-

stop panel and an alarm panel. Typically these are combined into one panel out on the platform. So is there one or two panels. Also the drawings show one panel out midway on the walkway.

A9. There are two panels, one start stop panel and one alarm panel. The panel out midway on the walkway is the panel for the sludge blanket monitor and separate from the panels mentioned above.

VOLUME 1 – BIDDING AND CONTRACT REQUIREMENTS CHANGE Instruction to bidders package, page 17, Bid Form, Item 4, Part 1 – Lump Sum Items, Bid

Item No. 1.1, Description FROM “……., exclusive of Section 44 42 24.03, paragraph 2.10. …….” TO “…….., exclusive of Section 44 42 24.03, paragraph 2.20. …….” ADD Section 0800, page 2 of 141, SC-4.02, 2.

2. Report dated March 17, 2015, prepared by S&ME, entitled: “Limited Lead-Based Paint Chip Survey Crooked Creek Water Reclamation Facility Secondary Clarifiers #5 and #6”, Consisting of 11 sheets.

VOLUME 2 – TECHNICAL SPECIFICATIONS CHANGE Section 01 11 00, 01 11 00 – 1, Paragraph 1.01-B.-6

FROM “6. Installation of stainless steel weirs and baffles in Clarifiers No. 5 and 6.”

TO “6. Installation of FRP weirs and baffles in Clarifiers No. 5 and 6.” DELETE Section 01 14 00, 01 014 00 – 1, Paragraph 1.02, A.,

DELETE IN ENTIRETY AND REPLACE WITH Section 01 14 00, 01 014 00 – 1, Paragraph 1.02, A.,

A. The Contractor shall be required to complete the following activities by the indicated date or days after the Notice to Proceed:

Consecutive Calendar Days after Notice to Proceed

Milestone Liquidated Damages Per Calendar Day

240 Substantial Completion of Clarifier No. 5

$1,000

300 Substantial Completion of Clarifier No. 6

$1,000

330 Final Completion of All Work $1,500

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ADD Section 01 14 00, 01 14 00 – 4, Paragraph 1.06, A., 7. 7. Project milestones will be considered and Clarifier No. 6 will be available to take off line prior to Clarifier No. 5 to allow the Contractor to obtain measurement required for fabrication of the clarifier mechanism. Once Clarifier No. 6 measurements are obtained, the clarifier will be placed online and Clarifier No. 5 can be taken offline in accordance with Section 01 14 00.

ADD Section 01 14 00, 01 14 00 – 4, Paragraph 1.06, A., 8. 8. Clarifier No. 5 or 6 shall not be taken offline prior to 90 days before the scheduled arrive date of the clarifier mechanism being installed in the clarifier.

DELETE Section 44 42 24.03, 44 42 24.03 - 7, Paragraph 2.05, B.

DELETE IN ENTIRETY AND REPLACE WITH Section 44 42 24.03, 44 42 24.03 - 7, Paragraph 2.05, B.

B. EDI Energy Dissipating Influent Well:

1. Supported from the centerwell support structure. 2. Function: Enhance flocculation and diffuse influent liquid into

clarifier. 3. The manufacturer of the device is solely responsible for the design of

the energy dissipating inlet. 4. FEDWA or Dual Gate EDI Wells are acceptable. 5. Other devices are subject to the review and approval of the Engineer.

For approval, the clarifier manufacturer shall present the results of field tests of municipal wastewater treatment facilities demonstrating the proven performance of the energy dispersing inlet. The results shall be from similarly sized, secondary clarifiers, operating at similar conditions. Three such test results shall be provided. Data describing the location, size, flow rates, and other related information shall be attached. i. The data shall demonstrate the device does not promote septic

conditions by collecting solids on portions of the device. ii. The data shall show the device does not re-suspend settled

solids under any flow condition. iii. The data shall demonstrate the device does not promote any

undesirable current within the flocculation well. 6. To the extent that license agreements, patent ownerships or other

contract arrangements prevent the use of a particular energy dispersing inlet by other parties, or substantially increase the cost, the secondary clarifier manufacturer shall coordinate their options with the Engineer for the purpose of selection of the energy dispersing inlet.

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DELETE Section 44 42 24.03, 44 42 24.03 - 11, Paragraph 2.08, B., 1.

DELETE IN ENTIRETY AND REPLACE WITH Section 44 42 24.03, 44 42 24.03 - 11, Paragraph 2.08, B., 1.

1. All-welded steel truss type bridge, with truss located below walkway, construction supported rigidly on center pier and at access end on clarifier wall with thermal expansion compensating anchorage.

DRAWINGS REVISE Drawings Number M1 in accordance with Attachment No. 1 with this Addendum. This addendum should be signed in the space provided below and returned with your bid. Failure to do so may result in your bid being deemed non-responsive. Company Name Authorized Representative Thank you. Holly Cafferata, CPPB Purchasing Manager

S&ME, INC. / 11420 Johns Creek Parkway / Duluth, GA30097 / p 770.476.3555 / f 770.476.0213 / www.smeinc.com

March 17, 2015

Gwinnett County Department of Water Resources684 Winder HighwayLawrenceville, Georgia 30045

Attention: Mr. Kristopher Campbell

Reference: Limited Lead-Based Paint Chip SurveyCrooked Creek Water Reclamation FacilitySecondary Clarifiers #5 and #66577 Plant DriveNorcross, Gwinnett County, GeorgiaS&ME Project No. 4480-15-004

Dear Mr. Campbell:

S&ME, Inc. (S&ME) is pleased to provide Gwinnett County Department of water Resources(GCDWR) with this report detailing the results of our limited lead-based paint (LBP) chip surveyconducted at the Crooked Creek Water Reclamation facility. The scope of services detailed inthis report was performed in general accordance with S&ME Proposal No. 44-1500010, datedJanuary 16, 2015 and GCDWR Purchase Order #2000262484, dated February 4, 2015.

1. EXECUTIVE SUMMARY

S&ME completed a limited lead-based paint chip survey on secondary clarifiers #5 and #6 at theCrooked Creek Water Reclamation facility on February 13, 2015 to specifically address areas ofthe facility that are slated for modification and/or removal during an upcoming project. Mr.Chad Wilbanks with GCDWR accompanied S&ME to identify the areas to be disturbed duringupcoming renovations to the secondary clarifiers.

Based on paint-chip sampling, S&ME conducted on February 13, 2015, the followingrepresentative surfaces exhibited “detectable” lead levels above analytical detection limits.

Clarifier #5

• Brown and red paint on metal cross-beam• Brown and red paint on metal support beneath catwalk• Brown and red paint on metal catwalk

Clarifier #6

• Brown and red paint on metal catwalk• Brown and read paint on metal cross-beam

Lead-Based Paint Chip Sampling S&ME Project No. 4480-15-004Crooked Creek Water Reclamation Facility March 17, 2015Secondary Clarifiers #5 and #6

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The Occupational Safety and Health Administration (OSHA) does not recognize a thresholdlevel of lead for definition purposes, only the airborne concentration of lead a worker is exposed,when disturbing coated surfaces. The analytical method cannot conclusively determine that leadis not present in a coating; however, the quantities reported may be useful in determining therelative risk associated with various demolition tasks, i.e. the lower the level of lead found in thepaint, the less likely disturbance will result in exposure in excess of the OSHA Action Level.Work activities affecting lead-containing paint coated surfaces (i.e. component removal, manualdemolition, paint surface preparation, etc.), should be performed in accordance with OSHA 29CFR 19126.62 (Lead in Construction), including but not limited to training, initial exposuremonitoring, the use of personal protective equipment, and medical surveillance.

S&ME recommends, if the catwalk, cross-beams and support structure over the clarifying tankscoated with a similar brown over red primer paint coating is disturbed, OHSA regulation 29 CDR1926.62 (Lead in Construction) should be followed. Destructive actions to paint finishes andother building materials with any detectable amount of lead, which may create a lead exposurehazard (sanding, manual demolition, torch cutting, blasting etc.), require employee exposuremonitoring, training, and worker protection, in accordance with OSHA (29 CFR 1926.62).

Additionally, the construction and demolition waste generated by renovation, painting, ordemolition activities is also regulated. Accumulations of lead containing waste (chips, blastingdebris, etc.) must be analyzed by Toxicity Characteristic Leachate Procedure (TCLP) analysis todetermine if the debris is classified as “hazardous waste” (greater than or equal to 5 milligramsper kilograms [mg/kg]). Waste determined to be “hazardous” must be disposed in a Subtitle Clandfill (landfill that accepts hazardous waste). At a minimum, lead paint accumulations (notclassified as hazardous) must be disposed in a permitted municipal solid waste (MSW) landfill orSubtitle D landfill (landfill that does not accept hazardous waste).

2. PROJECT DESCRIPTION

In a January 16, 2015 email from Mr. Kristopher Campbell with Gwinnett County to Ms.Jennifer Clark of S&ME, Mr. Campbell requested S&ME conduct a limited LBP chip survey atthe Crooked Creek Water Reclamation Facility prior to modifications or removal of secondaryclarifiers #5 and #6.

An S&ME certified lead-based paint inspector (Ms. Jennifer Clark) conducted the limited LBPchip survey at the facility on February 13, 2015. Mr. Chad Wilbanks, with Gwinnett County, metwith S&ME during the survey to walk-through the facility and identify the areas of the facilitymost likely to be disturbed or worked on during the future modification work.

The limited LBP chip survey focused on providing an evaluation of lead concentrations inaccessible painted surfaces and equipment of areas selected for modifications or removal at thepump station facility.

The components of this limited survey are described below. This service was performedexercising the ordinary skill and competence of consulting professionals in relevant disciplines inthis region.


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3. LIMITED LEAD-BASED PAINT CHIP SURVEY

3.1 Assessment Methodology

On February 13, 2015, S&ME conducted a limited LBP chip survey at the secondary clarifier #5and #6 at the Crooked Creek Water Reclamation facility to obtain data regarding lead-basedpaints (in the areas selected for modifications or removal). The purpose of the survey was toprovide information to demolition (and other applicable) contractors for the purpose ofcomplying with the OSHA regulation 29 CFR 1926.62 (Lead in Construction). OSHA has notestablished a threshold level to determine what percentage of lead in paint (or in other buildingmaterials) constitutes a potential lead hazard to workers. However the quantities reported may beuseful in determining the relative risk associated with various demolition tasks, i.e. the lower thelevel of lead found in the paint, the less likely disturbance will result in worker exposure inexcess of the OSHA Action Level (30 micrograms per cubic meter of air).

The lead-based paint assessment was performed utilizing an EPA accredited Lead-Based PaintInspector trained in accordance with 40 CFR 745.226. Paint chip samples were collected duringthis survey and analyzed to provide analytical data regarding the lead content of the areas tested.The representative samples were collected from areas selected for modifications or removal atthe facility and selected based on the color of the topcoat and the underlying paint layers and/orthe substrate on which it was applied. The possibility exists that lead-based paint finishes arepresent in those inaccessible areas such as pipe chases, wall voids, etc. Likewise, this assessmentwas performed for the purpose of a broad characterization of paint films with relatively largesurface areas.

Six paint chip samples were collected during this assessment and submitted to EMSL in Atlanta,Georgia for analysis of lead in paint by flame atomic absorption (FAA) method numberSW846-7000B/7420. Analytical results (concentrations) were reported in percent (%) by weight.EMSL laboratory is accredited under the National Lead Laboratory Accreditation Program(NLLAP).

3.2 Findings and Results

Based on paint-chip sampling S&ME conducted on February 13, 2015, the followingrepresentative surfaces exhibited “detectable” lead levels above laboratory detection limits.

Clarifier #5

• Brown and red paint on metal cross-beam• Brown and red paint on metal support beneath catwalk• Brown and red paint on metal catwalk

Clarifier #6

• Brown and red paint on metal catwalk• Brown and read paint on metal cross-beam

The summary of lead based paint chip samples analyzed is provided as Table 1 in Appendix I.Paint chip laboratory analysis and chain-of-custody record is provided in Appendix I.

A copy of the EPA Lead-Based Paint Inspector’s License is provided in Appendix II.


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4. CONCLUSIONS AND RECOMMENDATIONS

4.1 Lead-Based Paint

Based on the analytical results of the paint-chip sampling S&ME conducted on February 13,2015, lead in paint was detected above laboratory reporting limits on the cross-beams, thesupport beams beneath the catwalk and the catwalk on Secondary Clarifier #5 and #6 at thefacility. The analytical method cannot conclusively determine that lead is not present in acoating, however the quantities reported may be useful in determining the relative risk associatedwith various demolition tasks, i.e. the lower the level of lead found in the paint, the less likelydisturbance will result in exposure in excess of the OSHA Action Level. Work activitiesaffecting lead-containing paint coated surfaces should be performed in accordance with OSHA29 CFR 19126.62 (Lead in Construction).

S&ME recommends, if the motor shaft housing or any steel equipment coated with a similar redprimer paint coating as the primer coating on the motor shaft housing is disturbed, OSHAregulation 29 CDR 1926.62 (Lead in Construction) should be followed.

Destructive actions to paint finishes and other building materials with any detectable amount oflead, which may create a lead exposure hazard (sanding, manual demolition, torch cutting,blasting etc.), require employee exposure monitoring, training, and worker protection, inaccordance with OSHA (29 CFR 1926.62).

Additionally, the construction and demolition waste generated by renovation, painting, ordemolition activities is also regulated. Accumulations of lead containing waste (chips, blastingdebris, etc.) must be analyzed by Toxicity Characteristic Leachate Procedure (TCLP) analysis todetermine if the debris is classified as “hazardous waste” (greater than or equal to 5 milligramsper kilograms [mg/kg]). Waste determined to be “hazardous” must be disposed in a Subtitle Clandfill (landfill that accepts hazardous waste). At a minimum, lead paint accumulations (notclassified as hazardous) must be disposed in a permitted municipal solid waste (MSW) landfill orSubtitle D landfill (landfill that does not accept hazardous waste).

5. CLOSING

S&ME appreciates the opportunity to provide you with our services on this project. If you haveany questions regarding this project, please contact the undersigned at (770) 475-3555.

Sincerely,S&ME, Inc.

Jennifer Clark Kenneth R. Warren, CIHSenior Project Manager Senior Industrial Hygienist

Attachments

APPENDIX I

(TABLE 1: SUMMARY OF LEAD PAINT CHIP ANALYSIS)(LABORATORY ANALYTICAL REPORT AND CHAIN OF CUSTODY)

Sample ID Location Color Component Substrate 1Lead in Paint

PB1 Clarifier #5 Brown over red Cross-beam Metal 1.90%

PB2 Clarifier #5 Brown over red Support Beam Metal 2.30%

PB3 Clarifier #5 Brown over red Catwalk Metal 0.06%

PB4 Clarifier #6 - Pulley system Red Pole Metal <0.010%

PB6 Clarifier #6 Brown over red Catwalk Metal 1.40%

PB6 Clarifier #6 Brown over red Cross-beam Metal 1.50%

Notes:

Red Highlighted = Lead in paint detected above laboratory detection limits.

1Note: OSHA regulation 29 CFR 1926.62 requires worker protection during renovation and/or demolition activities when surfaces coated with lead-basedpaint are disturbed. OSHA does not recognize a threshold level of lead for definition purposes, only the airborne concentration of lead a worker isexposed, when disturbing coated surfaces. The analytical method cannot conclusively determine that lead is not present in a coating; however, thequantities reported may be useful in determining the relative risk associated with various demolition tasks, i.e. the lower the level of lead found in thepaint, the less likely disturbance will result in exposure in excess of the OSHA Action Level (30 micrograms per cubic meter of air).

Lead in Paint Chips - Flame AAS ( SW 846 30505*/7000B)

Crooked Creek Water Reclamation Facility - Secondary Clarifier #5 and #6

Norcross, Georgia

Table 1

6577 Plant Drive

S&ME Project No. 4480-15-004

Summary of Lead Paint Chip Analysis

Page 1 of 1

Client Sample Description ConcentrationLab ID AnalyzedLead

Collected

EMSL Analytical, Inc.706 Gralin Street, Kernersville, NC 27284

Phone/Fax: (336) 992-1025 / (336) 992-4175

http://www.EMSL.com [email protected]

Attn: Jenny ClarkS&ME11420 Johns Creek Parkway

Duluth, GA 30097

Received: 02/18/15 5:43 PM

4480-15-004

Fax: (770) 476-8930

Phone: (770) 476-3555

Project:

Collected:

Test Report: Lead in Paint Chips by Flame AAS (SW 846 3050B/7000B)*

021500815

CustomerID: ATLA59

CustomerPO:

ProjectID:

EMSL Order:

021500815-0001Pb1 1.9 % wt2/23/2015

021500815-0002Pb2 2.3 % wt2/23/2015

021500815-0003Pb3 0.060 % wt2/23/2015

021500815-0004Pb4 <0.010 % wt2/23/2015

021500815-0005Pb5 1.4 % wt2/23/2015

021500815-0006Pb6 1.5 % wt2/23/2015

Page 1 of 1

James Cole, Laboratory Manageror other approved signatory

Test Report ChmSnglePrm/nQC-7.32.3 Printed: 2/23/2015 9:58:17 AM

*Analysis following Lead in Paint by EMSL SOP/Determination of Environmental Lead by FLAA. Reporting limit is 0.010 % wt based on the minimum sample weight per our SOP. Unless noted, results in this report are not blank corrected. This report relates only to the samples reported above and may not be reproduced, except in full, without written approval by EMSL. EMSL bears no responsibility for sample collection activities. Samples received in good condition unless otherwise noted. "<" (less than) result signifies that the analyte was not detected at or above the reporting limit. Measurement of uncertainty is available upon request. The QC data associated with the sample results included in this report meet the recovery and precision requirements established by the AIHA-LAP, unless specifically indicated otherwise.

Samples analyzed by EMSL Analytical, Inc. Kernersville, NC EMSL Lab ID 102564 is accredited by the AIHA Laboratory Accreditation Program (AIHA-LAP), LLC in the Environmental Lead accreditation program for Lead in Paint Chips.

Initial report from 02/23/2015 09:58:17

http://www.EMSL.com

mailto:[email protected]

OrderID: 021500815

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OrderID: 021500815

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APPENDIX II

(LEAD-BASED PAINT INSPECTOR CERTIFICATIONS)

addendum #1 bl032-15

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