Special Specification 6226 Adjust or Relocate Campsite Utilities

Transcription

1 Special Specification 6226 Adjust or Relocate Campsite Utilities 1. DESCRIPTION 2. MATERIALS Adjust or relocate water, sewer and electrical utilities at park campsites locations as shown on the plans General. Provide new materials that comply with the details shown on the plans, the requirements of this item and the following items: Item 421, Hydraulic Cement Concrete Item 440, Reinforcement for Concrete Use Class A concrete for cast-in-place water valve box collars unless otherwise shown on the plans Electrical Materials. Submit manufacturers' product data for the following electrical system items: Submersible tap-blocks for splicing in pull boxes Service circuit breaker and enclosure Campsite RV power outlets, 30 amp and 50 amp Pre-cast concrete pads for campsite RV power outlets, 30 amp and 50 amp Conduit Metallic. Provide rigid steel, zinc-coated, and threaded type metal conduit conforming to ANSI C80.1 and UL 6. Provide zinc coating fused to the inside and outside walls. Provide threaded type rigid metal conduit fittings that are cast malleable iron, galvanized or cadmium plated. All fittings must be threaded type. Do not use split couplings. Provide EMT conforming to ANSI C80.3 for galvanized tubing. Provide zinc coating fused to inside and outside walls. Use compression fittings only. Do not use set-screw fittings for EMT Non-metallic. Provide heavy Wall Schedule 40 and Schedule 80 conduit that is 90 C UL rated. Conduit must be construct of polyvinyl chloride and conforming to NEMA TC-2, for direct burial or normal above ground use, UL-listed and in conformity with NEC article 352. Provide fittings for non-metallic conduit that conform to NEMA TC-3 and are specifically manufactured for electrical conduit. Water pipe fittings will not be accepted Wiring. Provide general use single conductor wire that is a minimum size of #12 AWG. Wire must be copper, type THWN, UL listed for general use at a maximum of 600 volts and a maximum temperature of 75 C in wet locations. Wire size #8 AWG and larger must be stranded. Provide wire that meets the color coding requirements of Table 1. Table 1 Wire Color Coding System Phase A Phase B Neutral Ground 240/120 Black Red White Green 1 1. For single conductor ground wiring #8 AWG or smaller

2 Provide colored phase tape for identification of all wires #6 AWG and larger. Apply tape in a spiral, half-lap manner over exposed conductor portions in pull boxes, junction boxes, RV power outlets, and other enclosures. Provide wire marking labels that conform to Section "Identification and Markings.". Adhesive type labels shall have an adhesive backing with a white background and black lettering equal to 3M Scotch-Code or T&B E-Z Code. Markers may be pre-printed, printed with a hand held printer, or write-on style. Other wire marking labels such as heat shrink tubing or Ty-wrap type labels may also be used as approved. Wire must be cleaned of oil, dirt, and pulling compound before wire markers are installed Circuit breakers. Provide circuit breakers that are quick-make, quick-break plug-in type with common trip on all multi-pole breakers. They shall have positive handle indication and an internal tie mechanism with overcenter, toggle-type operating mechanisms. Circuit breaker enclosures should be NEMA 3R, rainproof with a solid neutral block and a separate ground buss/lug. Provide circuit breakers that have a minimum UL listed interrupting rating (RMS SYM. AMPS) of AMP=10,000 AIC for 240 V maximum breakers. Interrupting ratings for load center main circuit breakers will be noted on the plans Campsite RV Power Outlets. Provide power outlets that are pad mounted type for mounting on pre-cast or cast-in-place concrete pads as detailed on the plans. Dimensions of the concrete pad mounting bolts or inserts must match the mounting bolt pattern of the power outlet. See the pad details and specifications on the plans Amp Campsite Power. Provide 30 amp campsite power outlets equal to Midwest Electric Products, Inc. Model #U041GP4, pad mount. Equip the power outlets with one 30 amp, ANSI #R-32U receptacle; one 20 amp, NEMA 5-20R receptacle; one 30 amp, 1-pole circuit breaker to protect the 30 amp receptacle; and one 20 amp, 1-pole, GFCI circuit breaker to protect the duplex receptacle. The power outlets also must have a NEMA 3R rated steel enclosure and pedestal with loop feed lugs in the pedestal suitable for copper or aluminum wiring, load center interior with a neutral buss for circuit breaker mounting, separate ground busses in the power outlet and in the pedestal, lockable hinged door and pedestal cover, heavy duty receptacles pre-wired to the load center breakers and busses, and be UL listed Amp Campsite Power. Provide outlets equal to Midwest Electric Products, Inc. Model #U075GP4, pad mount, equip the power outlets with one 50 amp, NEMA 14-50R receptacle; one 30 amp, ANSI #BR-32U receptacle, and one 20 amp, NEMA 5-20R receptacle, and one 50 amp, 2-pole circuit breaker to protect the 50 amp receptacle, one 30 amp, 1-pole circuit breaker to protect the 30 amp receptacle, and 1-20 amp, 1- pole, GFCI circuit breaker to protect the duplex receptacle. The power outlets also must have a NEMA 3R rated steel enclosure and pedestal with loop feed lugs in the pedestal suitable for copper or aluminum wiring, load center interior with a neutral buss for circuit breaker mounting, separate ground busses in the power outlet and in the pedestal, lockable hinged door & pedestal cover, heavy duty receptacles pre-wired to the load center breakers and busses, and be UL listed Water and Sewer System Materials. Provide Schedule 40 PVC water piping that is 2 in. and smaller. Provide solvent-welded Schedule 40 PVC or SDR-21 gasketed, piping for 4 sewer piping. All PVC piping must be constructed of materials that conform to cell classification B as defined by ASTM D1784 and ASTM D1785. All new pipe and related products must bear the NSF no. 14 seal of approval. Provide new solvent welded type Schedule 80 PVC pipe fittings for 2 in. and smaller piping. Furnish solvent cement that conforms to ASTM #D Provide galvanized steel water pipe conforming to the requirements of ASTM A-53 or ASTM A-120 standard weight and Schedule 40 pipe threading that has standard taper pipe threads conforming to ASME B

3 Provide galvanized malleable iron metal pipe fittings with threaded joints. All fittings for connections to PVC pipe must be threaded joint fittings. Provide lead-free type hose bibbs and vacuum breakers equal to the model numbers listed on the plans. Provide lead-free, ball, type valves with solvent welded ends, and stopped handle. 600 psi rated non-shock valve with a cold water service rating for up to and including 2 in. (50 mm). Provide valves equal to True Union non-metallic ball valves. Provide valve boxes made of high impact, high density polyethylene plastic with locking cast iron cover and the word "water" cast into the cover top. The valve covers and boxes provided must be equal to East Jordan Iron Works 34 Series. Provide two of any special tool required to unlock the new valve box covers. Furnish and install blue, detectable marking tape 6 in. above all water lines that are buried alone in a trench. Provide marking tape consisting of one layer of 0.35 mil thick aluminum foil laminated between two layers of inert plastic film. Where water lines are installed in a common trench with electrical conduits, furnish and install electrical marking tape placed with the writing face upward. Furnish and install green, detectable marking tape 6 in. above all sewer lines that are buried alone in a trench. Provide marking tape consisting of one layer of 0.35 mil thick aluminum foil laminated between two layers of inert plastic film. Install all tape with the writing face upward. Repair any existing water or sewer lines not scheduled to be replaced on this project that are damaged. Repair using materials that are compatible with the type of piping damaged. Repair PVC pipe using only one piece of pipe for each repair. Repairs must have at least one joint that is solvent cemented. 3. CONSTRUCTION 3.1. General. Coordinate all utility adjustment and relocation efforts with the Texas Parks & Wildlife Department (TPWD) facility superintendent before beginning work. Protect all existing electrical, water and wastewater appurtenances at all times during the construction. Promptly repair, at no additional cost, any damage to the existing electrical, water or wastewater systems and/or any interruption to the service such as line stoppages or breakage caused by contractor error. Provide testing for water mains and wastewater lines in conformance to the utility company s requirements or as directed. Perform the following testing as minimum for water mains: hydrostatic test, sterilization test All water lines, sewer lines, electrical lines, and all associated appurtenances installed with this project will be inspected by a representative of TPWD. The TPWD representatives decision of acceptability of the installation will be final Electrical Construction General. Perform all electrical work in accordance with the 2014 edition of the National Electric Code (NEC). The project electrical work must be performed by a contractor licensed with TDLR to perform electrical work. Perform electrical work under the direct, on-site supervision of a licensed, master or journeyman electrician. Submit copies of the state of Texas electrical contractor's license and the licenses for all of the electricians that will perform the work. Submit this information at the preconstruction conference as part of the project submittal information. Before the relocation of the electrical service, disconnect and isolate any existing electrical service equipment in accordance with the utility company s requirements. Use established industry and utility safety practices while removing electrical service equipment near any overhead utilities

4 Remove existing electrical service support a minimum of 2 ft. below finish grade unless otherwise shown on the plans. Repair the remaining hole by backfilling with material equal in composition and density to the surrounding area. Replace any surfacing such as asphalt pavement or concrete riprap with like material to equivalent condition. Disconnect conductors and remove them from the conduit or duct. Cut off all protruding conduit or duct 12 in. below finish grade. Abandoned conduit or duct need not be removed unless shown on the plans Installation of Conduits. Mechanically fasten together metal conduits, enclosures, and raceways for conductors to form continuous electrical conductor. Conduits must have openings temporarily plugged to exclude foreign materials, be reamed after cutting; have joints cut square, and butt solidly into fittings; have the ends terminated in a proper bushed fitting, and be rigidly supported so as to prevent undue stress or strain on the couplings and connectors. Use insulated type bushings on all metal conduits. Use rain tight hubs for conduit entries into the tops of outdoor enclosures. Use sealing locknuts for conduit entries into the sides or backs of outdoor enclosures. Install all conduit systems completely before conductors are pulled in. Metal conduit systems must be electrically continuous throughout Grounding. Provide a ground wire in all new wire runs installed in new or existing conduit. Connect a properly sized ground wire to all metal electrical enclosures that have wiring modifications on the project Underground Conduit Installation. Terminate rigid non-metallic PVC, Type EPC 40 or 80 conduits, with a bell-end fitting or male adapter and plastic bushing in RV power outlets and pull boxes. See trench details on the plans for underground conduit. Run conduit in straight lines except where a change of direction is required. Provide not less than 3 in. clearance from the conduit to each side of the trench. As each conduit run is complete, assure that the conduit interior is free from dirt or debris. Install conduit plugs or otherwise cover end of conduit to prevent entry of foreign material until wire is pulled into conduit. Except at conduit risers; accomplish changes in direction of runs exceeding a total of 10, either vertical or horizontal, with long sweep bends. Manufactured bends must have a minimum radius of 18 in. for use with conduits of less than 3 in. in diameter. Do not install conduit smaller than 3/4 in. below ground. For all rigid metal conduit in contact with earth, provide corrosion protected with corrosion protection tape or by installing PVC coated rigid metal conduit. Extend corrosion protection on the conduit a minimum of 6 in. above grade. Permanently identify all underground electrical conduits with a colored, electrical identification tape over the conduit systems before backfilling trenches. Install all tape with the writing face up Conductor Installation. Do not install conductors in conduit or other types of raceway until the raceway or conduit system has been completed. When installing conductors in conduit, use wire-pulling compound and exercise due care to prevent damage to conductors or insulation. Type THWN wiring with the outer nylon jacket damaged will not be accepted. Replace all damaged conductors at no expense Identification and Markings. Label all new feeder wiring in the pull boxes with the campsite number of the destination of the wiring. Place labeling on the wiring at the new tap-blocks Tests. Coordinate the testing of the electrical system items with TPWD and Construction personnel. All operational tests must be witnessed by TPWD inspection personnel

5 Test the new secondary feeder wiring installation for the relocated RV power outlets using a 500 V DC, generating type insulation tester (Megger tester) after all wiring is completed and ready for the attachment to the equipment and the new tap-blocks. The resistance between the each hot and neutral conductor and between each hot and neutral conductor and the ground conductor must conform to the NEC. The minimum acceptable insulation resistance for each wire must be 50 meg-ohms. Megger test results must be documented, signed by the licensed electrician performing the tests, and submitted to the TPWD engineer as part of the close-out documentation for the project. Perform an operational test after all equipment and loads have been connected and ready to use. These tests must verify the proper operation of all RV power outlet receptacles, circuit breakers, ground fault interrupters, and other electrical equipment or devices in the Park. Assure that the proper voltage is available at all RV power outlets and other receptacles. 3.3 Water and Sewer System Construction General. The exact locations of trench lines for new water lines to the relocated campsite RV power outlet locations and any new valves will be determined in the field at the start of construction. These determinations will be made between TPWD representative and the Contractor. Install new ball valves centered in the new valve boxes so that the sides of the valve box will not impede the operation of the ball valve s handle. Full range of operation of the valve s handle must be accomplished without pinching the operator s hand or fingers or without forcing the handle against the side of the valve box Quality Assurance. Install work in accordance with all applicable TCEQ, AWWA, local and state rules. Perform all water and sewer system work by or under the direct, on-site supervision of a qualified water utility worker. Submit a copy qualified water utility worker's recent work history related to installing potable water piping and utilities as part of the administrative submittal information required for the project Installation of Pipe. For new runs of water and sewer piping, do not damage pipe during laying operations. Lay the pipe so it will receive continuous support throughout its full length. Do not use couplings or gasketed pipe ends to support the piping. Clean and check the pipe for obstructions before joining or laying. Valves must not depend on the PVC piping for support. Place bricks under the body of the valves to provide support before placement of bedding gravel in the valve box. Support new valve boxes above the new piping using bricks. Valve boxes must not rest on the piping. Use solvent cement and primer recommended by the supplier or manufacturer furnishing the pipe and fittings. Apply with strict adherence to the manufacturer's application directions. Wrap all galvanized piping installed below grade with corrosion protection tape to a minimum of 6 in. above grade or 2 in. above the top of the RV power outlet concrete pad. Install water piping in accordance with the TCEQ rules, 30 TAC, Chapter 290, Public Drinking Water, subchapter D, Rules and Regulations for Public Water Systems". Do not exceed the manufacturer's recommendations for the curvature of the line or the deflection of pipe joints. Install pipe fittings for all bends in excess of 10. Maintain a working pressure rating for valves, fittings and appurtenances of 150 psig or greater. Cap the ends of all new lines with piping material that matches line to be capped. All piping and appurtenances must be new. All newly installed piping and related products must conform to American National Standard Institute / National Sanitation Foundation (ANSI/NSF) standard 61. All plastic piping must bear the NSF seal of approval (NSF-PW) for potable water. The plans do not indicate all bends, fittings, and transitions. Furnish and install these items as needed at no additional cost. Install piping to attain minimum TCEQ coverage over new piping

6 Provide for the de-chlorination of highly chlorinated water before discharge from the water system during the testing and chlorination stage of the project. Clean, flush, test, and disinfect the new water line piping per the specifications prior to connection to the park existing water system. Clean, flush and test the new gravity sewer line piping to assure that it does not leak and has the proper slope to maintain flow. Where water and sewer lines are in close proximity to each other, meet the installation requirements of TCEQ, section (e) Hydrostatic Testing. Furnish all labor, equipment, and materials necessary for the hydrostatic tests of new sections of water or sewer piping and valves added to the existing park system. Schedule each water or sewer system test with the TPWD inspector and Park Plant Operator(UPO). Each water or sewer system test must be witnessed by a TPWD inspector or his designated representative. Flush the new piping system with water to remove dirt, sand, etc. in preparation for testing and sterilization. Water for the hydrostatic testing will be provided by the park's existing water system on the park site. Route water from the existing system to each new section of piping through a backflow preventer temporarily installed on a tap off of the existing system. This backflow device will prevent contamination of the existing park water system from non-sterilized water present in the new sections of piping during the construction period. Perform a hydrostatic pressure test on each new section of piping before final connection of each new section of piping to the existing distribution piping. Do not perform final connection of each new section of piping until a hydrostatic pressure test is completed. Before the hydrostatic test and with water pressure applied to the part of the system to be tested, open and close each hose bib several times so that all air can be expelled from the pipeline before beginning the testing procedure. For each new section of piping, after the piping installation is completed and filled with water, and the trench partially backfilled leaving the joints exposed for examination, subject the new piping for two (2) hr. to a hydrostatic pressure test of 150% of the park's water system working pressure. Regardless of the park water system working pressure, the minimum test pressure for all tests on the new sections of piping must be 100 psi. Do not allow the test pressure to exceed the manufacturer's working pressure rating for any part installed in the new parts of the system. Examine the new piping sections for leakage and repair as necessary. Repeat the test until the results are satisfactory as determined by the continuous maintenance of test pressure on the piping for two (2) hr. with no drop in test pressure during the test period. No leaks will be allowed for solvent-cemented joints. Do not install vacuum breakers on the new hose bibs until the new sections of piping have been flushed and passed the hydrostatic test. Install new vacuum breakers before the sterilization of new sections of piping. Do not remove the break-off screw until the results of the water line sterilizations are accepted by the TPWD inspector. Only new piping installed for this project will be subjected to the 150% pressure test. Valve or cap off any existing piping so it will not be exposed to the test pressures. After the hydrostatic pressure testing is complete, cap off each new section of piping until it can be properly sterilized before connecting to the existing water system piping. Perform hydrostatic testing of the piping, fittings, and valves for the new valve on the distribution line in a similar manner to what is described above for the new sections of piping installed for the relocated campsite RV power outlets. Perform a hydrostatic test on the new sewer piping, fittings, and connections by completely filling the new gravity sewer line with water and providing approximately 10 of head pressure with a filled section of piping

7 at the high elevation end of the line. For the sewer system hydrostatic test all sewer system piping and fittings shall be installed except for the final connection to the lift station basin. The hydrostatic sewer piping test shall be conducted for a minimum of 4 hours and all fittings and connection points will be inspected for leakage. No leakage will be allowed for any fitting or connection point. If piping is limited to short runs of service line, at the discretion of the TPWD Inspector and Park UPO, a visual inspection of all newly installed pipe and fittings that are pressurized prior to backfill may be substituted for hydrostatic testing Sterilization of Lines. Coordinate sterilization and sampling with the Park UPO and in accordance with AWWA Standard C MEASUREMENT 5. PAYMENT 6226 Furnish all labor, equipment and materials necessary for the sterilization of new piping for the water system before connecting to the existing park water system and placing the new piping into service. Sterilize all lines and fittings by the application of a chlorinating agent. The chlorinating agent may be liquid chlorine, liquid chlorine/gas water mixture or a calcium hypochlorite solution. feed into the lines through a suitable solution feeding device or other approved method. Apply the chlorinating agent at or near the point from which the line is being filled and through a corporation stop or other approved connection inserted in the horizontal axis of the line. Controll the water used to fill the line so that it flows very slowly into the section being sterilized. Maintain the rate of application of the chlorinating agent in proportion to the rate of water entering the line so that the resulting chlorinated water solution in the piping system section being sterilized has at least 50 ppm of available chlorine. Retain th chlorinated water in the pipelines for a period of not less than 24 hr. At the end of the retention period, thoroughly flush all chlorinated water from the lines until the replacement water in the lines has a chlorine residual of not more than 0.4 ppm. Open and close all valves and all hose bibs on the lines being disinfected several times during the contact period to assure disinfection. Before installation, dose all parts and fittings being installed to repair a line, to tie-in a new section of piping, or to tie-in test equipment to the existing park water system with a chlorine solution that has a concentration of chlorine of at least 50 ppm. Water for the sterilization testing procedure will be provided by the park's water system. after all lines are sterilized and flushed as specified above, the Park UPO will collect samples of water from the water system main lines and submit to a Texas Department of Health (TDH) laboratory for bacteriological tests. Frequency and location of tests will be as directed. If the samples fail to meet the standards. The contractor must repeat the disinfection process as outlined above until the TDH tests show satisfactory results. Copies of the written test results from TDH for each water test sample will be retained by TPWD for the park records and the project file. This Item will be measured by each campsite. The work performed and materials furnished in accordance with this Item and measured as provided under Measurement will be paid for at the unit price bid for Adjust or Relocate Campsite Utilities. This price is full compensation for all materials, equipment and labor required for disconnecting and isolating the existing water, sewer and electrical services; relocating the service supports or pedestals; new service support foundations; trenching; backfilling holes; paying all fees, permits, and other costs; making arrangements with the utility company for all work and materials provided by the utility company; installing and connecting all components including poles, service supports, encasement pipes, foundations, anchor bolts, riprap, enclosures, switches, breakers, conduit (from the service equipment including the elbow below ground), fittings, conductors (from the service equipment including the elbow below ground), brackets, bolts, hangers, and hardware; and equipment, labor, tools, and incidentals