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excavated during construction of the well is used, it shall be emplaced in lifts no <br /> more than five feet thick, each compacted in place prior to emplacement of the <br /> next lift. <br /> f)A six-inch thick concrete grout plug shall be placed on top of the remaining <br /> casing such that it covers the entire excavated area above the top of the casing, <br /> including the area extending 12 inches or greater outside the well casing. <br /> g)The remainder of the well above the concrete plug shall be filled with grout or <br /> soil. <br /> 4.All wells other than water supply wells, including temporary wells, monitoring wells, or <br /> test borings: <br /> a) Less than 20 feet in depth that do not penetrate the water table shall be <br /> abandoned by filling the entire well up to land surface with grout, dry clay, or <br /> material excavated during drilling of the well and then compacted in place; <br /> b)Greater than 20 feet in depth or that penetrate the water table shall be <br /> abandoned by completely filling with a bentonite or cement-type grout; and <br /> c)Constructed in consolidated rock formations or that penetrate zones of <br /> consolidated rock may be filled with grout, sand, gravel,or drill cuttings within the <br /> zones of consolidated rock.The top of any sand, gravel or cutting fill shall <br /> terminate 10 feet or greater below the top of the consolidated rock or five feet <br /> below the bottom of the casing. Grout shall be placed beginning 10 feet below <br /> the <br /> d)Top of the consolidated rock or five feet below the bottom of the casing in a <br /> manner to ensure complete filling of the casing and shall extend up to the land <br /> surface. For any well in which the depth of the casing or the depth of the bedrock <br /> is not known or cannot be confirmed,the entire length of the well shall be filled <br /> with grout up to the land surface. <br /> 5.Any well that acts as a source or channel of contamination shall be repaired or <br /> permanently abandoned within 30 days of receipt of notice from the Department. <br /> 6.All wells shall be permanently abandoned in which the casing has not been installed <br /> or from which the casing has been removed, prior to removing drilling equipment <br /> from the site. <br /> 7.The well owner is responsible for permanent abandonment of a well except that: <br /> a)The well contractor is responsible for well abandonment if abandonment is <br /> required because the well contractor improperly locates, constructs, repairs or <br /> completes the well; <br /> b)The person who installs, repairs or removes the well pump is responsible for <br /> well abandonment if that abandonment is required because of improper well <br /> pump installation, repair or removal; or <br /> c)The well contractor(or individual)who conducts a test boring is responsible for <br /> 40 <br />