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2.03 WELL SCREEN <br /> The well screen shall be PVC schedule 80, flush-threaded. Well screen shall be <br /> factory-cut slots. <br /> 2.04 SAND PACK <br /> The sand pack shall be free of debris or organic impurities. <br /> 2.05 BENTONITE SEAL <br /> The bentonite seal shall consist of sodium montmorillonite clay. Granular size <br /> shall be based on drilling method. <br /> 2.06 NEAT CEMENT <br /> The neat cement shall consist of Portland Type 11 cement, or equivalent, and <br /> bentonite mixture with a water-to-cement ratio that includes no more than 8 <br /> gallons of water per sack of cement and 5 percent bentonite by weight. <br /> 2.07 CONCRETE <br /> The concrete shall have minimum of 28-day compressive strength of 2500 psi. <br /> 1 2.08 WELL PLUG <br /> Well plug shall be expansion type plug which provides a water tight seal. <br /> 2.09 WELL ENCLOSURE <br /> A. The well enclosure shall be a minimum 8"x 8" square, made of galvanized steel <br /> and shall have a lockable cover with a padlock. The cover shall open and close <br /> smoothly. <br /> B. The well enclosure shall be painted with etching primer, then painted with two (2) <br /> coats of YELLOW rust inhibitive paint. Etching primer may be applied at the <br /> Contractor's shop. Final coats of yellow rust inhibitive paint shall be applied in <br /> the field after installation of the enclosure in the presence of the Engineer. <br /> C. The well enclosure shall be labeled based on the well number. The labeling shall <br /> be with black paint and shall use stencils providing letters four inches in height. <br /> On-Call Driller RFB 6820 San Joaquin County <br /> Groundwater Monitoring Well Specifications 3 Public Works Dept <br /> Solid Waste Division <br />