PURPOSE: This rule sets criteria for the locations where monitoring well should be placed.

1. (1) A monitoring well shall be—

   1. (A) Located so that the well and its surrounding area can be kept in a sanitary condition and provide ready access for maintenance and repairs;
   2. (B) Located, if possible, so proper drainage in the vicinity of the well shall be provided to prevent the accumulation and pooling of surface water within ten feet (10') of the well;
   3. (C) If at all possible, located in areas that do not flood. If no reasonable alternative site exists, special construction criteria will be determined on a case-by-case basis by the division; and
   4. (D) Located where possible farther than fifteen feet (15') from a cavity used for underground utility lines or an overhead electric distribution line or not twenty-five feet (25') from an electric transmission line which is in excess of fifty (50) kilovolt (kV), except for the underground electrical service line in the vicinity of an existing well or known proposed well. If it is necessary to locate wells under electric lines safety precautions should be taken. In areas of traffic, the wellhead must either be protected by pylons to prevent damage, or completed as a surface flush mount as described in 10 CSR 23- 4.060(12)(B).

AUTHORITY: sections 256.606 and 256.626, RSMo (Cum. Supp. 1991).* Emergency rule filed Nov. 16, 1993, effective Dec. 11, 1993, expired April 9, 1994. Original rule filed Aug. 17, 1993, effective March 10, 1994. *Original authority: 256.606, RSMo (1991) and 256.626, RSMo (1985), amended 1991.