Attachment 3 - Technical Provisions.pdf

1/06 Technical Provisions- TP 3.0 Excavation, Trenching, and Backfilling Page 1

TECHNICAL PROVISION 3.0

EXCAVATION, TRENCHING, AND BACKFILLING

3.01 Scope of Work

The work covered by this section includes the furnishing of all plant, labor, tools, equipment, and material, and performing all operations in connection with the excavation, trenching, and backfilling for the installation of all pipelines, structures, and accessories, all in accordance with these technical provisions and applicable drawings.

3.02 Protection of Excavation

In conformance with applicable safety regulations, the Contractor shall provide suitable shoring and sheeting to protect all excavations and provide safe working conditions for workers.

3.03 Excavation

3.03.01 General

All excavation required for the performance of this contract shall be made by open cut methods unless otherwise shown on the drawings, required by applicable encroachment permits, or approved in writing by the Project Manager.

3.03.02 Trench Excavation

The sides of all trenches for the installation of utility piping systems shall be as nearly vertical as soil conditions permit below the level of the top of the pipe. The width of the trench shall not be less than 12-inches or more than 24-inches wider than the outside diameter of the pipe barrel. Trench excavation shall be centered on pipe alignment such that a minimum clear space of 6-inches is provided on each side of the pipe. Trench width above the level of the top of the pipe may be as wide as necessary for shoring and sheeting, and for proper installation of the work.

The depth of all trenches shall be as indicated on the drawings. If not otherwise specified, the depth of all trenches shall be sufficient to provide a minimum cover of 24-inches at all locations after final backfilling.

Unless otherwise required by applicable permits to be less, the maximum length of trench that may be left open at any one time shall not exceed 500-feet. No trenches shall be left open unless otherwise permitted in writing by the Project Manager.

All trench excavation shall comply with Federal and local OSHA regulations for trench safety.

1/06 Technical Provisions- TP 3.0 Excavation, Trenching, and Backfilling Page 2

3.03.03 Pavement Cutting

Where it is necessary to remove sections of asphalt pavement, the asphalt shall be saw-cut with approved equipment in a neat line 6-inches back from the outside edge of the excavation in order to provide a key when restored, or as approved by BIA roads permit or Tribal Manager.

Where it is necessary to remove sections of concrete pavement, the concrete shall be saw-cut to a depth of not less than 2-inches with neat, vertical, true lines in such a manner that the adjoining surface will not be damaged.

3.04 Placement and Compaction of Pipe Embedment and Backfill Material

3.04.01 Pipe Embedment

Pipe embedment is defined as that material required to bring the trench bottom up to grade and that material placed alongside and above pipe to a level of at least 6 inches over the top of the pipe. The pipe embedment area is divided into three zones as defined below.

Bedding: Bedding is that portion of pipe embedment zone beneath the pipe. If the native soil is suitable for bedding the pipe without over- excavation, the bottom of the trench shall be accurately shaped such that one fourth of the pipe circumference is provided with uniform bearing and support for each section of the entire length of the pipe. Imported bedding material shall likewise be placed to provide uniform and adequate longitudinal support under the pipe. Bedding material shall be placed and compacted in lifts not to exceed 6-inches in loose measure.

Haunching: Haunching is that portion of the pipe embedment zone from the bottom of the pipe to the springline of pipe. Haunching material shall be placed and consolidated to provide adequate side support to the pipe while avoiding both vertical and lateral displacement of the pipe from proper alignment.

Initial Backfill: Initial backfill is that portion of the pipe embedment zone from the springline of the pipe to a minimum level of 6-inches over the top of the pipe. Initial backfill material shall be placed and compacted in lifts not to exceed 6 inches in loose measure. Compaction shall be performed in a manner to avoid damage and disturbance of the embedded pipe.

3.04.02 Compaction

Unless otherwise specified by applicable permits or roadway authority, bedding, haunching, initial backfill, final backfill, and gravel resurfacing shall be compacted to the following percent of the maximum density as determined by ASTM D1557. In-place densities of materials shall be determined by the sand-cone method, ASTM D1556 or by nuclear methods, ASTM D2922.

1/06 Technical Provisions- TP 3.0 Excavation, Trenching, and Backfilling Page 3

Percent of Maximum Density Initial Final Location Bedding Haunching Backfill Backfill Roadways and Driveways 95 95 95 95

Unimproved Surfaces, Fields, Etc. 90 90 70 70

3.05 Surface Restoration and Resurfacing

3.05.01 General

The inclusion of a bid item and estimated quantity for asphaltic, concrete, or gravel resurfacing in the Bid Schedule indicates that these items are probable. However, the exclusion of these items from the Bid Schedule does not preclude the possibility that they will be required, merely that they are not anticipated. If unanticipated resurfacing is required, unit prices will be negotiated between the Contractor and the Contracting Officer.

3.05.02 Surface Restoration

After the piping and structures have been installed and all backfilling has been completed, areas which were disturbed shall be brought to true grades. All slopes shall be trimmed and dressed, and all surfaces graded to maintain existing drainage. All streets, alleys, driveways, sidewalks, curbs, or other surfaces which have been disturbed or damaged shall be resurfaced with like materials to a condition equal to or better than the original condition. All excess excavated material shall be properly disposed of by the Contractor.

3.05.03 Asphaltic Resurfacing

At all locations where asphaltic resurfacing is required, a compacted gravel base, 6-inches in depth shall be placed prior to placement of the asphaltic wear course. This base course shall be 95 to 100 percent 3-inch minus gravel with not more than 40 percent passing a 0.0165 inch square opening (No. 40 sieve). Asphalt shall be plant mixed, with certification that the mix meets the requirements of the applicable roadway authority.

Except where greater thickness is required by applicable roadway authority, the minimum thickness of the asphalt shall be the greater of 2-inches or that of the existing adjacent asphalt. Placement of asphalt shall be in lifts not exceeding 2-inches. Compaction shall be accomplished by pneumatic-tired or steel rollers throughout the spreading operation.

Final rolling shall be by steel roller. No surfacing shall be placed while the subgrade is

1/06 Technical Provisions- TP 3.0 Excavation, Trenching, and Backfilling Page 4 wet, if it is raining, or if the temperature is below 40 degrees F. All edges shall be clean and tack coated prior to placement of the patch.

3.05.04 Gravel Resurfacing

All gravel resurfacing shall be done on a properly compacted subgrade. The gravel shall be spread uniformly and compacted to a minimum thickness of 3-inches. The gravel shall conform to the following gradation requirement.

3.06 Open Cut Road Crossing for Water and Sewer Service Lines

Open cut water and sewer service line crossings shall be completed at all locations shown on the site plan. The Contractor is responsible to comply with all local, county, Tribal and BIA road crossing provisions whether a permit was issued or not. PVC encasement pipe shall be the diameter shown on the drawings and shall conform to material specification ASTM D1784, Type 1, Grade 1, manufacturing specification ASTM D2241, and the pipe shall be PVC schedule 80. All PVC pipe joints shall be rubber compression ring type with rubber gaskets conforming ASTM F477, and equal to J-M Ring Tite PVC Pressure Rated Pipe, or PWPipe TwinSeal PVC.

Steel encasement pipe and fittings shall be the diameter shown on the drawings and shall be Schedule 40 and shall conform to ASTM A120. The pipe shall be joined by the use of threaded steel couplings

Sieve Size Percent Passing Square Opening By Weight

3/4 inch 100

0.250 inch (No. 3 sieve) 50-65

0.0029 inch (No. 200 sieve) 5 max.

1/06 Technical Provisions TP 11.0 Individual Septic Tank Page 1

TECHNICAL PROVISION 11.0

INDIVIDUAL SEPTIC TANK

11.01 Scope of Work

material, and performing all operations in connection with the construction of individual septic tanks, including connection to building (house) drains, solid sewer pipe, cleanouts, abandonment of existing septic tanks, fittings, effluent filters, and appurtenances in accordance with these technical provisions and applicable drawings.

11.02 Permits and Approvals

The Government shall secure the applicable site approvals and sewage disposal permits for the work specified herein.

11.03 Location of Facilities

The location of the facilities specified herein shall be as shown on the drawings and/or as staked in the field by the Project Manager. The Contractor shall not change the designated location of these facilities without the prior approval of the Project Manager.

11.04 Inspection of Installation

In addition to the applicable inspection requirements of the Tribe and/or County, the Contractor shall notify the Project Manager at least 2 working days prior to placing final backfill over the septic tank so that the Project Manager may inspect the installation.

11.05 Solid Sewer Pipe

The Contractor shall install a solid smooth pipe from the septic tank to the building (house) drain. Solid sewer pipe and fittings shall be 4-inch PVC plastic, ASTM 3034, SDR 35, Sewer Service Lines or Schedule 40 PVC conforming to ASTM D 1785. Installation shall be in accordance with all state and local standards.

11.06 Effluent Filter

The Contractor shall install in the outlet tee of the septic tank an effluent filter cartridge equivalent to Zabel A1800 Residential Septic Tank Effluent Filter. The outlet tee in the septic tank shall be of sufficient length to extend one (1) inch below the bottom of the filter cartridge (See detail drawing).

1/06 Technical Provisions TP 11.0 Individual Septic Tank Page 2

11.07 Septic Tank

11.07.01 Tank

The tank shall be precast, reinforced, watertight concrete as manufactured by an established firm specializing in concrete products conforming to ASTM 6913. Minimum liquid capacity below the outlet level shall be as specified on the drawing(s) and each tank shall have 2 compartments. The walls, floor & top shall have a minimum thickness of 2 ½-inches. Adequate steel reinforcement shall be provided. Each compartment shall be provided with adequate tees, elbows and baffles. The tank shall meet all state and local standards.

11.07.02 Access Riser

Each compartment of the septic tank shall be provided with a watertight access riser with a minimum dimension of 24-inches for inspection and sludge removal. The access riser on the second chamber shall be centered so as to provide access to the effluent filter.

Access risers shall meet all state and local standards. Additional access ports, if required by local health codes, shall be installed by the Contractor at no additional expense to the Government. Risers shall be equal to Orenco systems lids and risers.

11.07.03 Septic Tank Installation

The septic tank shall be set in a hole excavated by the Contractor in accordance with all state and local standards.

11.08 Underground Cleanout

Where required and as shown on the plans, the Contractor shall install a two-way underground cleanout on the solid sewer line. The cleanout shall have a threaded plug and be constructed as detailed in the drawings. The cleanout shall be extended so that the square nut on the threaded plug is ½-inch below finished ground level. A concrete pad 18-inches square and 4-inches deep shall be poured around each cleanout at the ground surface. This pad shall be reinforced with welded wire mesh with a minimum 1 1/2-inch concrete cover over mesh. The wire mesh shall be ASTM approved W1.4 (1/8-inch) wire mesh on 6-inch centers.

1/06 Technical Provisions TP 12.0 Individual Lift Station Page 1

TECHNICAL PROVISION 12.0

INDIVIDUAL LIFT STATION

12.01 Scope of Work

materials, and performing all operations in connection with the construction of an individual lift station, including lift station basin, effluent pump, piping, force main, fittings, control panel, electrical controls and alarms, and appurtenances in accordance with these technical provisions and applicable drawings.

12.02 Lift Station

The lift station basin shall be either the second chamber of a septic tank, as shown in the drawings, or a precast, reinforced, watertight concrete basin as manufactured by an established firm specializing in concrete products, and shall conform to ASTM C. The basin shall have a minimum wall thickness of 2½-inches and the concrete shall obtain a minimum 28-day compressive strength of 3,000 psi.

The basin shall be as specified on the drawing(s), including the required minimum volume. The lift station basin shall be provided with a watertight access riser with a minimum dimension of 24-inches for inspection and maintenance. The Access riser shall meet all state and local standards.

An 18-inch square pedestal 4-inches high shall be provided as a base for the pump. The pedestal shall be located as shown on the drawing.

The installation of the lift station basin shall conform to the provisions of TP 11.0 for the installation of the septic tank and meet all state and local standards.

12.03 Effluent Pump

The sewage pump shall be as specified on the drawing(s), 115 volt, single phase submersible effluent pump. The pump shall be capable of passing 3/8-inch solids and pump at least 30 gallons per minute against a total head of 15-feet. Differing site conditions may require a similar pump with minor differences in flow/head characteristics to be provided by the Project Manager.

The pump power cord shall be easily detachable from motor housing. Connector shall be sealed to motor housing with rubber O-ring. The pump details shall be as shown on the drawings or equal. The effluent pump shall be installed within an effluent filter vault equal to ORENCO SYSTEMS Model PFEF 40 or approved equal.

1/06 Technical Provisions TP 12.0 Individual Lift Station Page 2

12.04 Electrical Controls and Alarm

The Contractor shall furnish and install a control system compatible with the supplied pump.

The controls shall include; circuit breakers for the pump and alarm system, magnetic contactor, mercury level control floats, a high liquid level alarm, running and alarm lights, and a Hand-Off- Automatic selector switch. All wiring shall be in accordance with the National Electrical Code and applicable state and local electrical codes. The installation shall be inspected and approved by the State Electrical Inspector.

Electrical service to the lift station shall be either from a new properly sized circuit breaker in the existing circuit breaker panel servicing the home, if space permits, or through a separate subpanel. Separate circuit breakers are required for both the pump magnetic contactor and for the alarm system. In any case a fused disconnect is required if service entrance panel or sub-panel is greater than 50 feet from the lift station and/or not in clear sight of the lift station and shall be located as shown on the drawings or as directed by the Project Manager.

The control panel shall be a NEMA 4X enclosure and shall house the "Hand-Off- Automatic" switch, green "pump on" indicator light, a terminal block for connecting the mercury float level controls, and the alarm system. The green "pump on" light, red alarm light and silence button shall be mounted through the enclosure door.

The magnetic contactor, alarm system, and control panel shall be mounted on outside wall of the home at a location acceptable to the homeowner. As an alternative, and with the approval of the Project Manager, the control panel or alarm panel may be located on a post near the lift station as long as the components are housed in NEMA 4X enclosure.

The pump electrical cable shall be Type UF single conductor cable sized to limit the overall voltage drop from the service entrance to the pump motor to less than 2 percent. In no case, shall wires smaller than 12 gauge be used. The electrical cable and control wires shall be buried at least 18 inches deep. House interior wiring shall be 12 gauge minimum and shall be Type NM or UF cable, while required conduit shall be EMT, PVC, or liquid tight flexible metal. All supports, nails, bolts, straps and screws shall be galvanized. The submersible power cable from the pump and the float cables shall be secured to a hook and secured such that the cables are not allowed to slip from their adjusted height.

The mercury level control switches shall be completely encapsulated in polyurethane foam and equipped with cord weights. The float switch shall be installed at the elevations indicated or as otherwise directed by the Project Manager. The electrical cable housing from the switches to the control panel shall be Type UF 14 gauge copper single conductor cable. Splices shall be made by using mechanical connectors and covering with heat-shrink tubing.

1/06 Technical Provisions TP 12.0 Individual Lift Station Page 3

12.05 Control System Functional Requirements

12.05.01 Demand Dosing

The liquid level in the individual lift station is sensed by 3 mercury level control switches suspended at different elevations from the top of the lift station. The first (lowest) mercury level control switch shall be a redundant off switch and shall de-energize the pump should the middle dual action on-off float fail. The middle float shall be dual action and energizes and de-energizes the lift station pump. The third (highest) mercury level control switch energizes the red light and alarm bell indicating a high water level condition.

During the normal mode of operation, the HAND-OFF-AUTOMATIC switch shall be in the "Automatic" position. As the liquid level in the individual lift station reaches energize level of the middle dual action mercury level control switch, an electrical signal shall be transmitted through the buried electrical cable to the control panel. The controls shall energize the lift station pump and green running light. As the liquid level in the individual lift station drops to the middle de-energize level, an electrical signal shall be transmitted to the control panel which shall de-energize the lift station pump and green running light. This cycle shall continue to repeat itself. Should the middle dual action on-off float fail, the redundant lowest level float shall de-energize the pump and activate the alarm bell and red alarm light indicating a low level float failure.

If the liquid level in the individual lift station rises to the top mercury level control switch, the red light and alarm bell shall be energized indicating a high liquid level condition. The alarm shall be silenced by manually pushing the "Alarm Silence" button, however, the red pilot light shall remain energized until the liquid level has fallen below the third mercury level control switch. This high liquid level light and alarm shall operate independently of the position of the pump selector switch.

When the pump selector switch is in the "Hand" position, the mercury level float switches shall be overridden and the lift station pump and green running light shall be energized independently of the liquid level in the lift station. When the pump selector switch is in the "Off" position, there shall be no power provided to the lift station pump and green running light.

12.05.02 Timed Dosing

Timed dosing may control the liquid level in the individual lift station, if specified by the Project Manager and shown on the drawings, with three mercury level control switches.

The third (highest) mercury level control switch serves as a high water level alarm and energizes the red light and alarm bell indicating a pump failure condition. When the pump is operational and dosing overload occurs, the liquid level will reach the second (mid-level) mercury level control switch and the timer shall be overridden, energizing the lift station pump and the green pump running light on the control panel. As the liquid

1/06 Technical Provisions TP 12.0 Individual Lift Station Page 4 level drops, reaching the first (lowest) mercury level, the control switch overrides the timer and de-energizes the lift station pump and the green running light.

When the liquid level in the individual lift station does rise to the third (highest) mercury level control switch, the alarm shall be silenced by manually pushing the “Alarm Silence” button. However, the red pilot light shall remain energized until the liquid level has fallen below the second mercury level control switch. This high liquid level light and alarm shall operate independently of the position of the pump selector switch.

When the pump selector switch is in the “Hand” position, the timer and mercury level float switches shall be overridden and the lift station pump and green running light shall be energized independently of the liquid level in the lift station. When the pump selector switch is in the “Off” position, there shall be no power provided to the lift station pump and green light running.

12.06 Piping

12.06.01 Lift Station Influent

The piping from the septic tank outlet to the lift station inlet shall conform to TP 11.0, solid sewer pipe. The inlet shall include a tee or baffle, as specified. The outlet discharge from the pump shall be Schedule 40 PVC 1120 pipe installed as shown in the drawings and to the approval of the Project Manager. Fittings shall be Schedule 40, ASTM 2466, except for the union, which shall be Schedule 80. The union shall be installed within easy reach from the manhole cover, hand-tight only. The male adapter that screws into the discharge port of the pump shall not be glued in place; standard plumbers’ pipe joint compound shall be used.

12.07 Force Main

The effluent force main pipe from the lift station to the shallow drainfield shall be 1 1/2-inch or 2-inch (as shown on the drawings) PVC 1120, SDR 26, conforming to ASTM 2241. All fittings for the pipe shall be 160 psi PVC with rubber compression ring joints or schedule 40 PVC with solvent welded joints.

The force main pipe shall be laid on grade in a trench at least 12-inches wide. Care shall be taken to bed the pipe in a material that is free of rocks or otherwise unsuitable material. Backfill shall be compacted by hand from the bottom of the trench to a minimum of 6-inches over the top of the pipe for the full width of the trench. A minimum of 18-inches of cover is required over the top of the pipe.

12.08 Submittals

The Contractor shall submit for approval prior to construction product/material information on the sewage lift station pump and controls.

1/06 Technical Provisions TP 30.0 Water Service Connections Page 1

TECHNICAL PROVISION 30.0

WATER SERVICE CONNECTIONS

30.01 Scope of Work

material, and performing all operations in connection with the construction of water service lines, including saddles, corporation stops, curb stops, water meters, coppersetters, meter boxes, fittings and appurtenances; and abandonment of existing wells; all in accordance with these technical provisions and applicable drawings.

30.02 Materials

30.02.01 Polyethylene (PE) Pipe

Polyethylene (PE) pipe shall be IPS size, 200 psi, SDR 7 in conformance with ASTM 2239. The pipe shall be produced from high density, ultra-high molecular weight PE 4710, NSF approved resin. The pipe shall conform to the latest revision of ASTM 1248 and AWWA C-901; and shall be equal to Driscopipe 5100 Ultra-line or West Flex. The designation, PE 3408, shall be stamped on the pipe.

Fittings and connections for PE pipe shall be made with non-flare compression connections equal to Ford Pack Joint, Mueller Insta-Tite, or McDonald Mac-Pak.

30.02.02 Saddles

Saddles shall be ductile iron, brass, bronze, or stainless steel with I. P. standard tapping and shall have rigid double straps or bale-type bottom connectors with a flattened surface.

The saddles shall be equal to Ford brass saddles, Mueller service clamps, or Romac style 202 saddles.

30.02.03 Corporation Stops

Corporation stops shall be bronze alloy with inlet I. P. standard thread and outlet thread compatible with the connecting piping, without the use of special adapters. They shall be equal to Ford or Mueller corporation stops.

30.02.04 Water Meters

Water meters shall be of cast bronze construction with inlet strainer magnetic drive and a hermetically sealed register. The meter shall read in gallons with a 6-digit totalizer, and accurately record flow from 1/4 to 20 gpm and conform to AWWA C-700. The meters shall be equal to Sensus SR Series or Precision Meter PMM.

1/06 Technical Provisions TP 30.0 Water Service Connections Page 2

30.02.05 Coppersetter

Coppersetters shall be all copper or bronze with horizontal inlet and outlet, locking stop at meter inlet, test valve, and adequate brace bars to support the meter in a horizontal position in a rigid manner. The coppersetter shall raise the meter above the normal service line bury depth so as to place the top of the meter and angle valve no less than 6 inches nor more than 10 inches below the top surface of the finished meter box. Tandem coppersetters are required for individual pressure reducing valve installations. The coppersetter shall be sized for 1-inch IPS PE pipe and 5/8” x ¾” water meter, and shall be equal to Ford or McDonald.

30.02.06 Meter Boxes

The coppersetter, angle stop, test valve and meter idler shall be enclosed within a standard sized meter box of wire reinforced concrete or fiber reinforced plastic. All sections of boxes and lids shall be nested or otherwise interlock to prevent lateral movement. Sufficient sections shall be installed to provide a walled enclosure for a minimum depth of 18 inches below the top of the meter. Minimum cover opening dimensions shall be 10 inches x 16 inches, except for tandem coppersetter installations, which require a minimum dimension of 20 inches. Meter boxes shall be equal to Fog Tite concrete meter boxes or Brooks plastic meter boxes.

30.02.07 Individual Pressure Reducing Valves

Individual pressure reducing valves, when required, shall be installed on tandem coppersetters or in the house plumbing and shall be bronze body construction with stainless steel seat ring and strainer. They shall be equal to Watts Series 135 or Mueller Series E-9300.

30.02.08 Water Service Line Installation

Water service lines and appurtenances shall be installed in accordance with Technical Provision 3.0, Excavation, Trenching, Backfilling, and all state and local standards.

A minimum of 2-feet of cover is required over the top of the water service lines. Actual bury depth shall be as specified by the Project Manager. Service lines shall be cut using a tool or tools specifically designed to leave a smooth, even and square end on the pipe.

Cut ends shall be reamed to the full inside diameter of the pipe. Pipe ends to be connected using fittings which seal to the outside surface of the pipe shall be cleaned to a sound, smooth finish before installation. Splices shall be kept to a minimum and shall be made with compression type couplings. No splices shall be made within 10 feet of any sewer line.

All service connections to water mains shall be made using the specified saddles.

Particular care shall be exercised to assure that the main is not damaged by installation of

1/06 Technical Provisions TP 30.0 Water Service Connections Page 3 the saddle. The saddle shall be aligned on the water main so that it is at a 45-degree angle above the springline of the pipe. Where required, the Contractor shall reconnect existing water service connections to new water mains using materials specified herein.

The Contractor shall also connect the water service line to the existing water service line from the house or facility which is being served, if available. Otherwise this line shall be extended to with 5-feet of the proposed building (house) and the end plugged and the location marked. The Contractor shall provide approximately 10-feet of additional PE pipe and left in the trench of the service line extends only with 5-feet of the house.

Individual pressure reducing valves, where required, shall be installed on tandem coppersetters housed in a appropriately sized meter box, or in the house plumbing as shown on the drawing or as determined by the COR.

Individual double check valve assemblies, where required, shall be housed in a separate (from the water meter) appropriately sized meter box, or in the house plumbing as shown on the drawing or as determined by the COR.

30.03 Encasement Pipe for Water Service Line

30.03.01 Encasement Pipe Material

PVC encasement pipe shall be the diameter shown on the drawings and shall conform to material specification ASTM D1784, Type 1, Grade 1, manufacturing specification ASTM D2241, and the pipe shall be PVC schedule 80. All PVC pipe joints shall be rubber compression ring type with rubber gaskets conforming ASTM F477, and equal to J-M Ring Tite PVC Pressure Rated Pipe, or PWPipe TwinSeal PVC.

Steel encasement pipe and fittings shall be the diameter shown on the drawings and shall be Schedule 40 and shall conform to ASTM A120. The pipe shall be joined by the use of threaded steel couplings.

30.03.02 Encasement Installation

Where encasement pipe is required and the open cut method of installation is allowed, the Contractor shall install encasement pipe in accordance with Technical Provision 3.0, Excavation, Trenching, and Backfilling.

Water service lines crossing roads or rights-of-way which cannot be open cut shall be bored. The Contractor shall bore the crossing by using a pneumatic or hydraulic boring machine such as a Hole Hog, or shall use water jetting equipment. Minimum allowable encasement pipe diameter for the crossing shall be of sufficient size to allow the water service line to be easily slid into position.

1/06 Technical Provisions TP 30.0 Water Service Connections Page 4

30.04 Flushing and Testing

Prior to installation of the meter and connection to the building or house, the entire water service line and appurtenances shall be flushed. Testing shall be accomplished by applying normal main pressure to the exposed water service line and inspecting all joints for leaks. All leaks shall be repaired. If a new water main is concurrently installed with the water service lines, then the service lines shall be tested concurrently with the main line with all joints exposed for leaks. No additional allowable leakage shall be allowed for the PE service lines.

30.05 Disinfection

Disinfection of the water service line shall be performed by the Contractor after the system is complete using liquid chlorine only with a minimum concentration of 50ppm. Use of HTH or other granular compounds will not be allowed. The chlorine solution will remain in the water service line for a minimum of ½ hour. The water service line will then flushed until chlorine residual is eliminated. Care shall be taken by the Contractor to prevent any accidental water use by the homeowner during disinfecting. After the chlorine residual has been completely eliminated, the contractor shall take water samples from the house for bacteriological examination by an EPA certified laboratory. Sampling methods shall be in accordance with recommendations of the laboratory. Testing shall be done at the Contractor's expense. If unsafe bacteriological results are received, the Contractor shall re-chlorinate and flush as necessary until safe bacteriological test are obtained. Any re-chlorination and testing needed will be at the Contractor's expense.