CHCID REQUIREMENTS FOR
NEW DOMESTIC WATER LINE INSTALLATIONS
PER MARICOPA ASSOCIATION of GOVERNMENTS (MAG)
UNIFORM STANDARD SPECIFICATIONS for PUBLIC WORKS
All new water main lines that are to be installed in the Chandler Heights Citrus Irrigation District, shall conform to the MAG specifications 601 through 611, 630 through 631, other appropriate sections, and CHCID engineer’s approval.
1- Prior to starting any water line construction, the contractor shall attend a coordination meeting with our CHCID engineer and receive a copy of these specifications plus a list of the approved pipe, fittings, valves, meter boxes and covers, fire hydrants, and other material to be used for any project.
2- All pipe shall be a minimum size of 6”, C-900, class 150, bell & spigot with a rubber gasket in the bell end for domestic water. NSF approved lubricant, for the use in drinking water systems, shall be used on each rubber gasket for ease of joining the pipe and to prevent rolling the gasket.
3- All below grade valves on main lines and fire hydrants shall be Muller number 2360 Gate Valves. These valves are available with MJ X MJ connections or MJ X Flange connections. All bolted below ground metal valves and fittings, shall be protected from corrosion by encasement in a polyethylene protective wrapping, referred to hereafter as polywrap, per MAG Specifications 601.5 through 601.5.3. Valve boxes and covers shall comply with MAG Detail 391-1B with the word, “WATER” molded in cover. Locking type debris caps as manufactured by SW Services, Model R-457-B, or equal, shall be installed inside each valve box in compliance with MAG detail 392 and as directed by the CHCID engineer.
4- The contractor shall submit five copies of each submittal for each item to be used on any project to the CHCID engineer for approval. Any material purchased by Contractor prior to CHCID submittal approval, shall be at his own risk and may be rejected by CHCID. Three copies of each submittal shall be returned to contractor as accepted or with comments. Submittals shall be reviewed only two times without additional cost to the contractor.
5- All trenches for main lines shall have a minimum depth of five feet and a width in accordance with Table 601-1 of the MAG Specifications.
6- At no time shall the contractor have more than 1320 feet of open trench. (MAG 601-2.10) Trenches in paved roads and main unpaved road areas are to be considered open until all ABC for pavement placement has been placed and compacted to 95%. Trenches in any utility easement street, road or alley right of way, outside of paved street areas, are to be considered open until the backfill has been properly installed and compacted to 85% to 90% in accordance with MAG table 601-2.
7- Prior to excavation, contractor shall call for blue-stake. After all existing underground utilities have been identified, the contractor shall be responsible and liable for any damages to or interruption of service caused by the construction.
8- Pipe bedding material shall be a minimum depth of 6” and consist of clean granular material such as, sand, pea-gravel or native soil, free of broken concrete, broken pavement, wood, or other deleterious material, as approved by the CHCID engineer. The pipe zone material shall be of like kind as bedding and shall extend from the pipe bedding to 12” above the top of the pipe.
9- Trench widths shall conform to MAG specifications table 601-1. All trench excavation shall comply with OSHA requirements and MAG specifications 601.2.9. Backfill material shall be of approved material and shall be placed and compacted to 85% to 90% in 8” lifts from the pipe zone material to finished grade for unpaved areas and to 95% to finished sub-grade for paved areas and main roads. Compaction of backfill material shall comply with MAG specifications table 601-2. All new domestic PVC water main line trenches shall be backfilled to 18” below the surface, then a continuous metallic locator tape shall be placed in the middle of the trench. Backfill and compaction shall continue from this point until trench backfill and compaction is completed.
10-The contractor shall employ and pay for the services of an Arizona State Approved Testing Lab for the purpose of testing the density of compaction of all backfill material. Compaction tests shall be performed every 100 feet of trench or as directed by the CHCID engineer and at each 2 foot lift and accordance with paragraphs 5 and 8. CHCID shall be notified when these tests are to be performed and may request to be present to witness these test. Copies of all compaction test results shall be given or sent to CHCID. CHCID shall, if not present for any test, be notified immediately should any compaction test fail.
11-All installations of any underground water lines shall be inspected and approved by CHCID prior to placing pipe zone and backfill material. Incomplete water lines shall be plugged or capped at the end of each work shift to prevent rodents or foreign material from entering pipe lines. During construction, all pipe and fittings shall be kept clean and clear of any damage. No pipe shall be installed that shows any signs of UV or other damage.
12-Newly laid or repaired water mains shall be flushed, pressure tested, disinfected and final flushed prior to placing into service.
Primary Flushing of Water Lines: New and repaired water lines smaller than 12” shall be flushed for a minimum period of fifteen minutes. This is accomplished with all pipe joints and couplings left exposed.
Pressure Testing of Main Lines: With all pipe joints and couplings exposed, all new and repaired water mains shall be tested at a minimum of 150 PSI for a period of two hours. Maximum PSI loss shall not exceed two PSI during the two hour test. CHCID shall witness all pressure tests.
Disinfection of Water Lines: Disinfection of all water mains shall be completed in accordance with MAG Specifications 611.6, 611.11 using an NSF approved, 12.5% bleach solution for 24 hours. The amount of the 12.5% bleach solution to be used shall be so sufficient that, after the 24 hour test, the chlorine residual shall not be less than 10.0 PPM. Should the residual be less than 10 PPM, the contractor shall retest until an acceptable result can be accomplished. The CHCID engineer shall witness and approve all of these tests.
13- Final Flushing, Sampling and Testing of All New and Repaired Main Lines: After a successful disinfection test, the new or repaired main lines shall be flushed and tested in accordance with the MAG Specifications 611.15 and until the chlorine residual throughout the line is reduced to 1.0 PPM or less. CHCID may witness this process, but the contractor shall be required to send a copy of final Lab Test Report to CHCID for record.
14-All cost requiring any existing CHCID system upgrades, to facilitate water service to new installations, shall be paid to CHCID prior to beginning construction.
15-During construction of any new water mains or water lines requiring CHCID water service, owner or contractor shall keep CHCID informed of the project progress and request for inspections shall be made at least 24 hours prior to inspection time and date.
16-In the event any work associated with the installation of new water mains or water lines is found NOT to be in compliance with CHCID requirements, CHCID may issue a “Stop Work Order” requiring all work to be stopped until the noncompliant work has been corrected to the satisfaction of CHCID.
17-Upon substantial completion (system operational) of work, a walk through with the CHCID engineer shall be required and any items found to need correcting, “Punch List Items” shall be corrected. Once all listed items have been corrected, a final walk through inspection shall be made. Should there be no further infractions or non-compliance items found, CHCID shall issue a “Letter of Final Completion” to the owner or developer.
18-At the same time, the owner shall issue to CHCID, a one year unconditional warranty covering all of his work, one set of as-built drawings, and a letter or “Certificate of Ownership” of the newly constructed water lines and easements required for the operation and maintenance of system.
19-Should the owner or contractor need any additional information during construction, we encourage you to contact CHCID prior to proceeding with the work.