New-State Well Codes

When a well is installed with a submersible pump and an above ground discharge, it shall contain an UL approved check valve and an air-vacuum relief valve prior to any buried portion of the discharge pipe. When water is pumped to a pond or other body of water, the end of the pump discharge pipe shall be terminated at least 2 feet above the highest elevation of the water in the pond or other body of water.

When a well must be located adjacent to a building, it shall be located so that the centerline of the well extended vertically will clear any projection from the building by not less than 2 ft.

When meeting the minimum isolation distances is physically unworkable, or location of the subsurface disposal field can not be determined, additional protective measures must be used. Additional protection shall be provided through the use of additional casing and grouting of any annular space. Driller shall discuss the well location problems with the owner and the final location and use of additional protective measures shall be agreed to before construction. Where possible, the well should be located in a non-hazardous location where the well will not be subject to damage from vehicles and similar hazards.

When no danger of flood or back flow, drain onto ground surface using graded pipe of not less than 1/8 in/ft toward outlet. Junction of pit floor and drain pipe, drain pipe and joints to be watertight. Any drain to ground surface shall be screened prevent entrance of animals and insects. Connections with sewer, house drain or storm drain are prohibited.

When used for sealing material, must meet following requirements: 1) composed of uniformly mixed slurry of Portland cement or High Early Strength Type III Portland cement and potable water, or High-alumina cement and potable water, mixed in following proportions (Type of Cement — Gallons of Water Per Sack of Dry Cement, respectively): (a) Portland Cement — 4-1/2 to 6; (b) High Early Strength Type III Portland Cement — 5-1/2 to 6-1/2; (c) High-alumina Cement — 4-1/2 to 6. Additives to increase fluidity, reduce shrinkage or control time of set may be used, expanding agents such as aluminum powder may be used at a rate not exceeding 0.075 oz/sack of dry cement. Calcium chloride should not exceed 2 lb/sack dry cement. High-alumina cement and Portland cement of any type shall not be mixed. Other types of cement not to be used w/o approval. In no case shall sand or aggregate be added to cement grout mixtures. In no case shall permanent well casing be moved or driven following placement and initial set of cement grout.

Where a chemical injection system is directly connected to a water well used for irrigation, a backflow device shall be installed in accordance with Section 925.40 of the Illinois Water Well Pump Installation Code. Installation shall be made only by or under supervision of persons, firms or corporations holding a valid license under the Illinois Water Well and Pump Installation Contractor's License Code [415 ILCS 35] unless exempt from the provisions of that Act.

Where annular space is grouted to min depth of 20 ft., well to be cased at least 100 ft. Casings shall be steel, stainless steel or plastic.

Where existing wells have buried well seals, the seal shall be replaced with a pitless well adapter, or the casing shall be extended above the ground surface in accordance with Section 920.90(c) of the Illinois Water Well Construction Code (77 Ill. Adm. Code 920) when the existing well seal is removed.

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.

With Surface Casing - watertight, welded, steel plate at least 3/16 inch in thickness to be installed between the inner production casing and the outer surface casing at the wellhead. A watertight fill port with threaded cap may be installed for the purpose of placing additional filter pack material in the well. W/O Surface Casing - if permanent casing not installed, filler tubes are to be used, oversize well bore having nominal diameter of ≥4 inches than nominal diameter of permanent casing. A suitable plug to be installed between filter pack and grout seal. Watertight fill pipe with threaded cap may be installed for purpose of placing add'l filter pack material. O.D. of fill pipe shall not exceed 1/2 thickness of grout seal surrounding permanent well casing and to be centered in annular space.

Without watertight liner, 100 ft.

Work to be completed by licensed well driller, installation and repair of pumps must be completed by a licensed well driller or licensed pump installer.

Yield and drawdown test: should include static water level, pumping rate, drawdown measurements, recovery water levels, and depth of pump setting. Contractor should advise well owner that one or more samples should be submitted for bacteriological analysis and should not be used until satisfactory results are obtained. Every new, modified, or reconditioned ground water source should be examined for its chemical characteristics by tests of a representative sample in a department or other approved laboratory. The samples should be collected and tested as soon as practical.

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.