PART 1 - GENERAL

1.01 SECTION INCLUDES

A. Slip Lining Pipe.

B. Cured-in-Place Pipe Lining.

C. Formed-in-Place Pipe Lining.

D. Spot Repairs by Pipe Replacement.

1.02 DESCRIPTION OF WORK

A. Sewer Rehabilitation.

1. Pipe Lining:

a. Resin impregnated, cured in place pipe.
b. Deformed polyethylene for formed in place pipe.
c. Deformed polyvinyl chloride for formed in place pipe.
d. Slip lining.

2. Pipe spot repairs.

B. Reference is made to the Iowa Department of Transportation Standard Specifications for Highway and Bridge Construction, Series 2001, and all current Supplemental Specifications and Materials Instructional Memorandum by the term "Iowa DOT Specifications" and/or "Iowa DOT I.M."

1.03 SUBMITTALS

A. Submit under provisions of Division 1.

B. Manufacturer's instructions for installation of pipe liner and appurtenances.

C. Construction sequence.

D. Catalog data, samples, manufacturer's data and listing of applicable standards for special, unique or proposed substitute materials if requested by Jurisdictional Engineer.

E. Contractor and material supplier must each certify that materials being provided meet  requirements of these specifications or that alternate materials or substitutions have received written approval of  Jurisdictional Engineer.

F. Project Record Documents.

G. Upon requests the Contractor will provide Material Certifications to the Jurisdictional Engineer.

1.04 SUBSTITUTIONS

A. Use only materials conforming to these specifications unless permitted otherwise by Jurisdictional Engineer.

B. Obtain written approval of Jurisdictional Engineer for all substitutions prior to use.

C. Provide, as a minimum, the following information for evaluation.

1. Product Information.

a. Product name.
b. Year product first available in United States.
c. Total footage or number of line segments installed in United States.
d. Results of all available product testing, including but not limited to leakage, physical properties, pipe stiffness, chemical resistance, strain-corrosion, external loading, flow characteristics, infiltration/inflow reductions, structural capacity, and external hydrostatic loading capacity.
e. Samples of before and after product.
f. Design method.
g. Typical liner thickness for pipe sizes included in the project.

2. Manufacturer Information.

a. Manufacturer name.
b. Years experience manufacturing the product.
c. Country of manufacture of all product components.
d. Quality control procedures for product manufacture, including inspection requirements, testing procedures and allowable tolerance levels.
e. Related ASTM standards, or other nationally recognized standards for product manufacturing.

3. Installer Information.

a. Installer name.
b. Completed project list for last five years including for each project and year completed, client name/address/contact person/phone number, footages installed by pipe diameter and number of lateral reinstatements.
c. Detailed installation procedures, including estimated times for each task, lateral reinstatement methods, number of required excavations and any other items unique to each product.
d. Video of installation process, if available.
e. Evidence of properly trained personnel.
f. Related ASTM standards or any nationally recognized standards for product installation.
g. Available equipment list.
h. Detailed procedures for repairing the product in the event of future damage or failure and for tapping future service connections, including and required specialized equipment or training.
i. Videos of two rehabilitated sewer sections showing before and after conditions.
j. Additional information may be required.  The submittal of prequalification information in no way implies that the product, manufacturer or installer will be deemed to be qualified. The Owner, in its sole discretion, will determine whether a product, manufacturer or installer does or does not qualify as an approved equal.

1.05 DELIVERY, STORAGE AND HANDLING

A. Deliver only materials that fully conform to these specifications or for which submittals have been provided to Jurisdictional Engineer and approved for use.

B. Load, transport and unload pipe and appurtenances at project site.

C. Store materials and handle to avoid damage.  Replace any damaged materials.  Remove damaged materials from site and replace.

1.06 SCHEDULING

A. Construction Sequence:

1. Attend a preconstruction meeting if required by Jurisdictional Engineer.

2. Submit plan for construction sequence and schedule prior to commencing construction.

B. Conflict Avoidance:

1. Expose potential conflicts such as utility lines and drainage structures in advance of construction.  Verify elevations and locations and verify clearance for proposed construction.

2. Complete elements of work which can affect line and grade in advance of other open cut construction unless noted on plans.

3. Notify Jurisdictional Engineer of conflicts discovered or changes needed to accommodate unknown conditions.

1.07 PUBLIC RELATIONS PROGRAM

A. Establish a Public Information and Notification Program for contacting each home or business connected to the sanitary sewer and informing them of the work to be done, and when the sewer will be off-line and the following specific steps:

1. Written notice to be delivered to each home or business describing work, schedule, how it affects them, and a local telephone number of the Contractor which they can call to discuss the project or their problems.

2. Personal contact on the day of lateral verification with CCTV.  Each lateral shall be verified by having the homeowner run water down their drain.  If the homeowner is unavailable, other arrangements shall be attempted (cleanouts) to drain water through the lateral to verify each connection.

3. Written notice and attempted personal contact the day prior to beginning inversion of the section of sewer to which they are connected.

4. Personal contact with any home or business which cannot be reconnected within the time stated in the written notice.

5. If so required by any affected served business or homeowner, portable toilets for use by the occupants will be furnished and serviced by the Contractor.

6. The cost of these items are considered to be included in the cost of the CIPP.  No additional payment will be made for these items.

1.08 SPECIAL REQUIREMENTS

A. Notify Jurisdictional Engineer immediately if contaminated soils, historical artifacts or other environmental or historic items are encountered.

B. Prior to start of work, notify all affected parties 24 hours in advance as to length of time their service will be blocked.

C. Notify jurisdiction's water works to use meter and pay for water, if required.

D. Conform to local, state and federal requirements.

E. Jurisdiction will provide available VHS format video tapes to contractor for use in pipe rehabilitation, as appropriate.

F. Owner will provide water for installation of cured-in-place pipe at a nearby hydrant.  Use a separate valve mounted on hydrant.

1.09 MEASUREMENT FOR PAYMENT

All measurements for payments will be made by the Jurisdictional Engineer or authorized representative.

A. Pipe Lining:

1. Measure pipe in linear feet along centerline of pipe liner in place.

2. Measure each size and type of pipe liner installed from center of manhole to center of manhole.

3. Payment shall be made at the unit bid price for each type and size installed.

B. Building Sanitary Sewer Service Reconnection:

1. Measure each active existing building sanitary sewer service reconnected to liner pipe by total count.

2. Includes services reconnected by excavating and reconnecting services or by trenchless reconnection methods.

3. Payment shall be made at the unit bid price for each reconnection.

C. Incidental Items:

1. Items that are not listed as specific bid items, but are required for proper completion of the work are incidental to construction.

2. Incidental items may or may not be shown on plans.

3. Unless shown as bid items, the following items are incidental.

a. Removal of obstructions, using internal or external methods.
b. Excavation and backfilling for obstruction removal.
c. Pipe cleaning.
d. Televising the pipe.

4. No payment shall be made for incidental items.

D. Spot Repairs by Pipe Replacement:

1. Measure the aggregate total of each type and size of pipe installed in linear feet along centerline of pipe.  Reaches of 20 feet or less shall be bid as lump sum for the minimum length.

2. Pipe connection couplings, cutting of pipe to proper lengths, bedding and backfilling are incidental to spot repair.

3. Building sanitary sewer service connection shall be paid under Section 4010.

4. Payment shall be made at the unit bid price for each type and size of pipe installed.

PART 2 - PRODUCTS

PART 3 - EXECUTION

3.01 EXAMINATION

A. Conduct Public Relations Program.

B. Cleaning:

1. Clean soil, grit, debris and obstructions prior to television inspection and/or insertion of liner pipe.

2. Remove materials and do not allow to pass to downstream sections.

3. Deposit material at an approved site.

C. Televising:

1. Furnish jurisdiction with a standard VHS video tape of sewers while the flow is being bypassed before lining process and after lining process and service reconnections have been completed.

2. Provide on-tape numerical display of camera location, indexed from starting manhole, in feet.

D. Service and Obstruction Location:

1. Coordinate and cooperate with Jurisdictional Engineer for service and obstruction location.

2. Locate the active sewer services by one of following:

a. Closed-circuit televise service locations, breaks, obstructions, and structural failures by experienced personnel.

b. Insert sounding device through service, noting its location on ground surface.

c. Dye testing.

3.02 BYPASSING SEWAGE

A. Submit bypassing to Jurisdictional Engineer for review.

B. Plug line at a point upstream of pipe to be rehabilitated if bypassing required.

C. Pump Flow to Downstream Point or Adjacent System as Directed by Jurisdictional Engineer.

1. Provide pump and bypass lines of adequate capacity to handle all flows.

2. Provide adequate reserve pumps on site for emergency use and for storm flows.

D. Do not allow damage to public or private properties.

3.03 OBSTRUCTIONS

A. Remove all obstructions.

B. If an obstruction is encountered which cannot be removed by methods operating within the pipe, excavate and remove obstruction upon approval of Jurisdictional Engineer.

C. Backfill, compact, and restore surface in accordance with Division 3 - Trench Excavation and Backfill, and Division 7 - Streets and Related Work.

3.04 TEMPORARY SEWER SERVICE

A. If full normal sewer service is not re-established within the times stated, provide temporary facilities or hotel accommodations for affected residents and businesses.

3.05 SLIP LINING

A. Installation:  Install in accordance with manufacturer's recommendations for liner pipe and ASTM F 585, unless noted otherwise.

B. Preliminary Work:  Complete preliminary work as per Section 4030, 3.01, 3.02, 3.03 and 3.04 before installation.

C. Excavation:

1. For slip lining insertions, excavate at or near one structure and work from existing manhole at other end of section to be pulled.

2. Insert Pit:

a. If one section of pipe to be pushed or pulled at a time, dig evenly down to sewer similar to a jacking pit.
b. If liner pipe is to be joined together above ground and pulled into sewer, dig pit length 12 times inside pipe diameter and slope pit end back to ground surface at 2.5 to 1.

D. Test Head:

1. Pull pulling head with one short section of liner pipe through sewer before inserting liner to test for taps or obstructions protruding too far into the sewer.

2. Attach cables to both ends of test head to allow for removal if an obstruction is encountered.

E. Liner:  Pull or push liner into the host pipe in accordance with ASTM F 585.

F. Service Reconnection:

1. Allow liner pipe to recover.

2. No sanitary service to be left unconnected for more than 24 hours.

3. Complete reconnections involving excavation of service lines in accordance with jurisdictional plumbing codes.

4. Excavated liner reconnections to be reconnected as per plumbing code except that annular space between host pipe and slip liner pipe to be filled with grouting process.

G. Grouting:

1. Before trimming ends of pipe and sealing, allow for pipes to recover its original length.  Time to be at least equal to time to pull liner into place.

2. Fill space between liner and host pipe with Controlled Low Strength Material, Section 3010, 2.11 D, or other material approved by Jurisdictional Engineer.  Pump filler from lower end of liner.

3.06 RESIN IMPREGNATED CURED-IN-PLACE PIPE (CIPP)

A. Install in accordance with manufacturer's recommendations for this lining process and ASTM F 1216 unless noted otherwise.

B. Complete preliminary work as per  Section 4030, 3.01, 3.02, 3.03 and 3.04 before installation.

C. Tube to be resin impregnated, hydraulically inverted in place with an approved lubricant, and cured in place as per ASTM F 1216, Section 7.

D. Continuous between manholes and may span several manhole reaches as allowed by the equipment, properties of CIPP and size and condition of sewer.

E. Free of uncured spots, lifts (spots cured away from the sewer, and delaminations).  Remove and replace.

F. Service Reconnections:

1. No sanitary service to be left unconnected for more than 24 hours.

2. Complete reconnections involving excavation of service lines in accordance with jurisdictional plumbing code.

3.07 DEFORMED HDPE OR PVC FORMED-IN-PLACE PIPE (FIPP)

A. Install in accordance with manufacturer's recommendations for particular lining material and process, unless noted otherwise.

B. Complete preliminary work as per Section 4030, 3.01, 3.02, 3.03 and 3.04 before installation.

C. Liner Installation:

1. Designate location where insertion will begin, subject to Jurisdictional Engineer's approval.

2. Transport FIPP to site in continuous length on spools compatible with manufacturer's designated process.

3. Heat FIPP material at job site as necessary for insertion.  Pull FIPP into sewer with appropriate pulling heads, cables, and heat distribution equipment.

4. FIPP to be continuous between manholes as allowed by tensile properties of FIPP and size and condition of sewer.

5. Connect fully inserted FIPP to heat source distribution equipment.

6. Round and expand by uniformly distributed heat, steam and pressure and by mechanical devices.

7. After FIPP has been expanded to a tight fit, cool gradually under pressure until process is complete.

8. To be continuous without joints over entire length.

9. Free of all material defects, no pits, pinholes, cracks, crazing, folds or unrounded sections.

10. Repair any defects at Contractor's expense.

D. Service Reconnections:

1. No sanitary service to be left unconnected for more than 24 hours.

2. Complete reconnections involving excavation of service lines in accordance with Jurisdictional plumbing code.

3.08 SPOT REPAIRS BY PIPE REPLACEMENT

A. Strip and stockpile topsoil and excavate at each location.  Remove any pavement materials from site.  Use care to avoid damage to existing pipe.

B. Remove existing pipe to the extent required and disconnect affected sewer services.

C. Install replacement pipe of the same nominal size as existing.  Material shall be as specified for Sanitary Sewers in Section 4010.

D. Temporarily support pipe at proper line and grade.

E. Reconnect sewer services.

F. Wrap all couplings with Polyethylene Wrap per Section 5010, 2.06.

G. Install Controlled Density Fill bedding per Section 3010.

H. Backfill trench per Section 3010.

I. Replace topsoil in grassed areas.

J. Replace pavement as directed.

K. See Detailed Drawings.

3.09 CLEANUP AND CLOSEOUT

A. Verify that services are reconnected and fully operable, with at least 90% of original capacity.

B. Submit initial and final video tapes to Jurisdictional Engineer.

C. Remove all equipment and debris.