wastewater treatment specifications

7/31/2019 Wastewater Treatment Specifications

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Ferdinand Wastewater2008 Collection System Specifications

GS 01 Description of Work

GS 02 Excavation and Grading

GS 03 Pipe Laying, Bedding and Backfilling

GS 04 Inspection

GS 05 Testing

GS 06 Maps

GS 07 Guarantee

I. Sewer PipeII. Manhole Pipe EntryIII. Manhole Pipe ConnectionIV. Manhole Sections and JointingV. Concrete Riser RingsVI. Steel Riser RingsVII. Manhole Frame and Lid


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General Sewer Construction

GS 01 Description of Work;Sanitary sewer mains as shown on plan and profile sheet

GS 02 Excavation and Grading;Excavating shall be as indicated on the plan and profile sheet to the lines, grades andelevation shown. All grades and elevations shall be done with a inside pipe laser.

If rock is encountered, then rock shall be removed to a point 6 inches below pipe andbedded with #8 crushed limestone. The final rock grade shall be 12 inches above thepipe crown.

Trench excavation width for 8 inch pipe will be 24 inches wide.

Adequate and proper shoring of all excavations shall be the responsibility of thecontractor, and he shall provide barricades, signs fencing, and etc to protect trenchesand safety to the site.

GS 03 Pipe Laying, Bedding and Backfilling

Pipe shall be laid accurately to the lines and grade as shown on the plan and profilesheet. Pipe laying shall proceed up-grade, beginning at the lower end of the sewer withan inside pipe laser.

All sewer pipes will be put to grade on a minimum of 4 inches of # 8 crushes limestone.There should be no voids under or around the pipe. The pipe shall have a minimum of 12 inches of #8 crushed limestones above the pipe crown. I rock is encountered duringthe excavation, a minimum of 6 inches of # 8 limestone will be under the pipe.

No material shall be used as backfill that contains stones having a dimension greaterthan 2 inches, nor shall debris, rock, broken concrete, blacktop, wood, etc. be used.

All pipe laying shall be in accordance with ASTM D-2321.

The sanitary sewer line shall be separated from a water line with 18 inches vertical and10 foot horizontal clearance. To obtain proper horizontal and vertical separationbetween water mains and proposed sanitary sewers, PVC C-900 shall be used.

Vertical Separation;

If the 18 inch vertical separation is not practical the crossing shall be arranged so thatthe sewer joints will be equidistant and as far as possible from the water main joints.The contractor shall follow the set standards per the Great Lakes-Upper MississippiRiver Board of State and Provincial Public Health and Environmental Mangers. A

copyof this can be seen and reviewed at the Ferdinand Wastewater Treatment Plant.


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Horizontal Clearance;

Horizontal clearance shall be at least 10 feet. If this is not practical the designengineer

may require construction of slip-on mechanical joint pipe complying with publicwater

supply design standards of the agency and be pressured tested to 200 psi to assurewater tightness before backfilling.

Stream Crossing;

All material and construction shall be in accordance with INDOT and IDNRspecifications, and in accordance with Great Lakes-Upper Mississippi River Board of State and Provincial Public Health and Environmental Mangers, and must complywith all requirements of the permit as issued by IDEM and Town of Ferdinandspecifications.

The top of all sewers entering or crossing streams shall be at a sufficient depth belowthe natural bottom of the stream bed to protect the sewer line. In general, the

followingcover requirements must be met:

a. One foot of cover where the sewer is located in rock;b. Three feet of cover in other material. In major streams, more than three feet of

cover must be required; and

c. In paved stream channels, the top of the sewer line should be placed below thebottom of the channel pavement.

The pipe segment is composed of a material not subject to damage from freezing, suchas ductile iron. PVC piping encased in concrete will not necessarily be adequately beprotected.

Inspections;

When the job is in progress, the Town of Ferdinand will inspect and approve and/orreject any portion of the construction that has been performed even if there is a siteinspector.

No portion of the work shall be covered prior to the Town of Ferdinands inspection orfield inspector selected by the Town. A 24 hour notice shall be given to the

WastewaterSuperintendent prior to the start of the construction.

GS 5 Testing

Air Testing;

All sewer pipes shall be air tested according to 327 IAC 3-5-3, (ASTM-F1417) forPVC pipe. The Town of Ferdinand shall be notified 48 hours in advance prior to


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testing. All testing results shall be recorded and a copy of the report given to theWastewater Superintendent within 48 hours of the test.

The forms will be provided by the Wastewater Superintendent to the contractor.Prior to the testing the wastewater personal will explain to the contractor the processof the testing to meet ASTM requirements of F-1417.

Deflection Testing;

All deflection testing shall be done according to 327 IAC 3-2-3. Deflection testingwill

be performed 30 days after the final backfill.

No pipe shall exceed a deflection of 5%. If deflection exceeds 5%, replacement orcorrection shall be accomplished in accordance with requirements in the approvedspecifications.

The rigid ball or mandrel used for the deflection test shall have a diameter not lessthan 95 percent of the base inside diameter or average inside diameter of the pipe

depending on which is specified in the ASTM Specifications, including the appendix,to which the pipe is manufactured. The test shall be performed without mechanicalpulling devices.

Manhole Testing;

All manhole testing shall be in accordance with ASTM C 1244-93, Standard TestMethod for concrete sewer manholes by negative air pressure (Vacuum) test.

This test method is intended to be used as a preliminary test to enable the installer todemonstrate the condition of the concrete manholes prior to backfilling. It may alsobe used to test manholes after backfilling; however, testing should be correlated withthe Town giving 48 hours advance notice.

GS 6 Maps

Upon completion of the project, 3 sets of AS-Builds plans will be made to showthe exact location of cleanouts, Ys, elevations, grades, distance, and all testingresults and etc. This must be done by the Engineer that drew up the blue prints.

Theseplans will be given to the Wastewater Superintendent within 30 days after thedeflection testing. All CAD Drawings and Electronic files shall be given to theTown showing all changes and all files unlocked and no password protection.

GS 7 Guarantee

Work shall be guaranteed for 1 year from the date of acceptance (after deflectiontesting has been completed). This guarantee will be on cleanouts, pipe, connections,backfilling, yard work, manholes, workmanship associated with the installation of


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these items.

The developer and/or contractor shall be responsible for requesting the Town toexcept the sewer mains after the 1 year warranty period. This shall be done at aregular Town Council Meeting as to provide proof in the minutes recorded by theTown Clerk/Treasurer of the request. If this is not recorded it will be the developerand/or the contractor responsibilities for all cost of upkeep and/or repairs of thesewer mains they installed.

Specifications

I. Sewer Pipe;

All sewer mains shall be SDR-26 heavy wall pipe and will comply with ASTM D-3034 specifications.

Sewer mains shall have a minimum depth of 48 inches and the sewer main shall beconstructed to allow for basement hook-ups.

Home service lines shall be SCH-40 pressure pipe with belled end. All fittings shallbe SCH-40 construction as well. (ASTM D-1785 & ASTM D-2665)

No SDR-35 pipe shall be allowed or fittings

Commercial and Industrial connections shall be 6 inch or larger in size and cleanoutsevery 100 feet and one outside the building.

Home service connections shall be 4 or 6 inch in size and cleanouts installed every100 feet and one outside the house, the Wastewater Superintendent will make thisdecision based on distance and conditions of site.

Pipe Grade: 4 inch = inch per foot6 inch = 1/8 inch per foot8 inch = 1/16 inch per foot

All service lines shall have a 12 ga.copper tracer wire attached to the pipe installedwith duct tape every 6 feet. The end of the wire shall be terminated and secured 12inches above grade at the house with a SS clamp. All wire splices shall be solderedand heat shrink installed to make water tight.

II. Manhole Pipe Entry;

All manhole pipe entries that need to be installed other than cased in place shall becored drilled and sealed with a pressed seal gasket (PSX Boots).

Note: No cored drilling shall be allowed within 6 inches of any seam.

III. All manhole pipe connections shall be either pressed sealed gasket (PSX) provided


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with 2 SS clamps per connection, or A-Loc type.

Grouting shall be around all incoming and outgoing pipe connections inside of themanhole prior to any flows.

IV. Manhole Sections and Jointing;

Manhole barrel sections and bases shall be precast and be in accordance with ASTM478-72 or equal. The manhole base shall be a mono base and shall have Ipanex and/ora waterproofing coating sprayed onto all of the exterior concrete manhole at theconcrete MFG prior to shipping as well as the manhole sections.

The manhole shall have a rock base of 12 inches under the mono base section. Therock shall be free of lime and shall be leveled prior to placement of base.

After the connecting pipes are in place, #8 rock shall be placed to a point of 12 inchesabove the pipe crown.

All manhole section joints shall be water proofed by using an controlled expansionwaterstop CS-231 sealant inch x 1 inch joint seal and a type RS Profile Gasket, O-Rings not allowed.

The contractor shall notify the Wastewater Superintendent 24 hours in advance as toinspect all the manhole structures for cracks or defects. The WastewaterSuperintendent will let the contactor know if the manhole structures pass or fail. If

thestructure fails inspection the structure shall be removed from site and a new oneordered at the contractors expense.

Approved Manhole Manufactures;a. Spencer Concrete 812-659-2318b. Thorn Orwick Concrete 812-945-5219c. M&W Concrete 812-426-2871d. Others will need Wastewater Superintendent approval

Note: Due to progress, some materials that may be new to our area, will need theWastewater Superintendent approval before purchasing or brought on sight. Thecontractor shall provide all materials and a sample of the product that needs approval10 days before the start of the project or the product shall be rejected.

V. Concrete Riser Rings;

One 8 inch concrete riser ring at a minimum will be used to bring the steel casting tosurface grade. No more than 12 inches will be allowed per manhole, if more is neededa manhole section may be needed. The Wastewater Superintendent has the right tomake a field adjustment if needed.

All concrete riser rings shall be sealed with 2 CS-231 seals each forming a separateseal and over lapping 6 inches each way. The concrete will be clean of all debris for a


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wastewater treatment specifications

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