State Well Codes

Drilled hole to be straight & plumb. Test Plumbness & Alignment according to AWWA A-100.

Wells to be grouted from top of weathered rock interface to 15 ft. into competent bedrock. Should be grouted from bottom upward in continuous operation.

Disinfect well with initial chlorine concentration of 100 mg/L. Disinfectant solution to remain in well for a min of 2 hours. Drilling equipment, including pumps & down hole tools to be cleaned & disinfected prior to their use. Other solutions used to decontaminate drilling equipment include trisodium phosphate, sodium carbonate, and sodium bicarbonate. A 10 % aqueous solution of trisodium phosphate is good as a rinsing solution or detergent. A 10-20 % aqueous solution of sodium carbonate is effective for cleaning inorganic acids from equipment. Sodium bicarbonate in a 5-15 % aqueous solution can effectively clean both acids and bases from drilling equipment.

Free-chlorine residual of 10 mg/L to be maintained in water at the drill site. Water used for drilling to be chlorinated to 50-100 mg/L. Water from water bodies such as wetlands, swamps, and ponds should not be used. Lead packers should not be used.

Owner or representative to obtain permit from Board of Health prior to construction. Water Supply Certificate must be issued by the BOH certifying that the private well may be used as a drinking water supply.

50 ft.

50 ft.

5 ft.

Identify all potential contaminants within 200 ft. of the well. Should be upgradient and as far as possible from potential sources of contamination. Should be located to be reasonably accessible for repair, maintenance, testing, and inspection. Should be completed in a water bearing formation that will produce the required quantity of water under normal operating conditions without adversely impacting adjacent wells.

25 ft. from roadway, 15 ft. from right-of-way, whichever is greater. "Rights-of-Way Management" regulations (333 CMR 11.00) include procedures and requirements for marking and recording the location of private drinking water supplies which are within 100 ft. of any right-of-way.

Sealed only by drilled licensed by Maryland State Board of Well Drillers or under supervision of Approving Authority. Sealing materials to be 1) concrete mixed at 5 94-lb sacks of Portland cement per yard of concrete, 2) Neat Portland cement grout, 3) mixture of 5 94-lb sacks of Portland cement and 1 cubic yard sand 4) Bentonite as a slurry mixed at 2lb/gal water or in chip or pellet form. To be filled & sealed so that well will not act as a channel for interchange of undesirable water or be a hazard. Clay, silt, sand, gravel, crushed stone, mixtures of these materials, and sealing materials may be used as a filler in sealing a well. In the sealing of an unsuccessful well in Hydrogeologic Areas 3, 4, and 5, the drill cuttings may be used as fill material. Organic matter may not be used. Disinfection of fill material may be required by Approving Authority. See .36 for Well Sealing Procedures.

All wells to be vented except for artesian and dug wells. To be covered with 24 mesh corrosion resistant screen. The vent pipe should terminate in a downward position at or above the top of the casing.

All wells completed with the casing extending above grade should have a surface seal designed to eliminate the possibility of surface water flowing down the annular space between the well casing and the surrounding backfilled materials. The surface seal should extend to a depth below the local frost line.

Submersible multi-stage, jet, centrifugal, piston, turbine, or helical rotor pumps may be used for private water supply systems. To be installed below frost line with a pitless adapter. It is recommended that the pump installer be certified by the National Water Well Association for the installation of domestic pumps (1 to 3 hp). Turbine pumps are not used for private water systems in MA.

To protect all connections to well casing & comply w/ NSF Standard 56.

Must be a licensed well driller by Maryland State Board of Well Drillers.

All grout shall be placed with tremie pipe. Coarse fill material may be used if grout is lost rapidly during emplacement. Wells to be grouted no later than 24 hours after well casing has been installed in Hydro Areas 1&2, and 72 hours in Hydro Areas 3,4&5. Hydro Areas 3,4&5: annular space grouted from bottom of casing to land surface. Minimum depth of grout not less than 18 ft in Hydro Area 3, and not less than 38 ft in Hydro Area 4&5. If experiencing caving conditions with greater than 30 ft of casing, annular space shall be grouted from caving point or depth of 30 ft, whichever greater, to the land surface. If annular space cannot be grouted by these regulations, well shall be abandoned and sealed.

Required upon completion of construction. Can use calcium hypochlorite, sodium dichloro-tirazine dehydrate, or sodium hypochlorite. Tablets or dry granular material may not be used as the only chlorination material. Chlorine soln of at least 10 gal. w/ concentration of 100 mg/L, but not more than 500 mg/l to be placed in top of well if use tablets or granular chlorine. Free residual chlorine to be 3.0 mg/L for private wells at the drilling site. Soln to be agitated, then stand without agitation for 12 hrs. If after 12 hrs, residual is 5 mg/L chlorine or greater, well can then be pumped until odor & taste of chlorine is undetectable. If after 12 hrs residual is less than 5 mg/L, disinfection procedure shall be repeated.

ASTM F480. In Hydrogeologic Areas 3, 4 ,and 5, plastic well casing may not be used for the main casing where caving conditions occur before casing placement. Plastic casing with diameter 4 inches or less shall be minimum schedule 40, greater than 4 inches diameter shall be minimum of SDR 26.

To be watertight. Joints for metal casing may be electrically welded or threaded, plastic well casing joints may be threaded, solvent welded or o-ring. Screws or other mechanical devices may only be used to join PVC well liner.

To be threaded onto casing or secured by stainless steel screws. Must be watertight, screened and vented if required. Must comply with standards of NSF or WSC or Approving Authority. In areas where flooding is likely to occur, including 100-year flood plains and coastal areas, wells shall be fitted with flood resistant caps.

To be watertight.

Required. Must meet standards of NSF, WSC, or the Approving Authority. To be installed on all wells except those enclosed in an above grade pump house. Connections must be watertight. Unit shall be installed in conformance with depth of water service pipe requirements of applicable State or county plumbing code.

Materials to meet requirements of new installation. If extending casing for above-grade terminal, shall install a pitless unit, solvent weld plastic casing, thread or weld metal casing. Install mechanical compression coupling or pipe coupling approved by Approving Authority.

50 ft.

10 ft.

50 ft.

Required upon construction or reworking well. Company shall record name of Company, date, depth, gpm yield by one or more following methods 1) engraved on well cap 2) engraved on aluminum plate permanently attached to casing 3) permanently affixing placard to forward-facing side of pressure tank using permanent marker or 4) permanently affixing placard on wall near and in clear and obvious view from pressure tank using permanent marker. Contact Commission for alternate methods.

Required - NGWA standards - 50 ppm for 4 hours upon completion of new or repaired wells, installation or repair of pump, or servicing of wire.

Required.

Shall be Schedule 40 or heavier and NSF approved for potable water use, including PVC, CPVC, ABS or Commission approved substitute. Seal created by using a "jaswell" type seal tip, shale packer or equal, and the casing shall be placed in an open hole.

Shall extend above ground surface minimum 8 inches. Additional height or vented watertight cap may be required in flood-prone areas. Contractor responsible for minimum 20 ft. of casing. At least 10 ft. of casing extending into bedrock recommended. Special requests allow well casing to terminate below ground surface. Extending steel casings by welding or threading. Plastic casing extensions by cement welding or threading. No other methods acceptable.

Must terminate 8 inches above ground, 24 inches above finished ground surface in areas likely to flood.

Yield test required for domestic water supply wells. Shall produce minimum of 1 gpm for 6 hrs. Replacement wells servicing existing dwelling exempt from gpm requirement. Water yield test may be required by Approving Authority in Hydro Areas 1,2,4&5, each well in Hydro Area 3 shall have yield test in accordance with regulation, except where County Water and Sewer Plan delineate that mandatory yield test be waived. Yield test procedures provided §G(1) of this regulation.

Must be properly sized.

One check valve to be installed within 20 ft. of pump discharge. Shall be accessible for service but shall not be direct buried. One foot valve shall be installed at the end of suction line for non-submersible pump with exception of a driven point. Any non-submersible pump with the capacity to develop more than 75 psig shall have a relief valve. A shutoff valve shall not be installed between the pump and the relief valve or operating control for the pump. The installation of a relief valve shall conform to a minimum of the current State of Maine Internal Plumbing Rules Chapter 238, Section 11.

K-type copper, minimum SCH 40 Galvanized steel, minimum 160 psi Polyethylene coil plastic, & minimum SCH 40 PVC accepted. On all well casings 5 inches or larger for submersible pump installations, 1 torque arrestor, cable guide, or centralizer to be used at min of 50 ft. intervals for 1st. 200 ft. for nonmetallic piping. For submersible pumps w/ > 5 in. casing, 1 torque arrestor to be placed within 5 ft. of discharge pump. No plastic or nylon fittings to be used in well or trench w/ submersible pumps unless they are cement type for use with semi-rigid pipe. All connections to flexible plastic pipe shall be dbl clamped with stainless steel clamps. Materials used for securing the wire to the pipe shall not contain materials hazardous to the water quality.

300 ft.

60 ft.

60 ft.

License by Board evaluation of experience and passing exam.

Shall comply with Act PA 1956, as amended (electrical admin.act)

To be in compliance w/ ASTM A 53-90b, A 106-91, or A 589-89a or in compliance with the standards of API specification 5L-90. Inside diameter shall not be less than 2 inches.

Steel shall be threaded or welded joints. PVC shall be deep socket bell ends or couplings in accordance with ASTM F 480-90 and ANSI/NSF 14. Must be watertight.

Well caps shall be weathertight, vented and vermin-proof.

Must be water tight.

Be properly vented to avoid the creation of a vacuum. Vents shall be constructed in a manner such that they will not become blocked or allow contamination to enter the well.

150 ft.

50 ft.

Where possible, shall be located upgradient and maximum practical distance from potential or known source of contamination. Shall be accessible for cleaning, treatment, repair, testing, and inspection. Shall not be located in area subject to flooding unless protected as prescribed in writing by health officer.