Section 18 AAC 60.840 - Constituents for groundwater monitoring(a) The owner or operator of a Class I MSWLF shall(1) under a detection monitoring program, monitor groundwater for (A) all analytes listed in 40 C.F.R. Part 258, Appendix I, as amended through August 1, 2005, adopted by reference, unless a reduced list of constituents is designated under 18 AAC 60.850(a); and(B) any additional analytes and parameters that the department determines are necessary based on site-specific conditions and the type of waste disposed in the facility; or(2) under an assessment monitoring program, monitor groundwater in accordance with 18 AAC 60.860 for (A) all analytes listed in 40 C.F.R. Part 258, Appendix II, as amended through August 1, 2005, adopted by reference, unless a reduced list of constituents is designated under 18 AAC 60.860; and(B) any additional analytes and parameters that the department determines are necessary under the facility's detection monitoring program.(b) The owner or operator of a facility subject to groundwater monitoring, other than a Class I MSWLF, shall (1) under a detection monitoring program, monitor groundwater for(A) all analytes listed in 40 C.F.R. Part 258 , Appendix I, as amended through August 1, 2005, adopted by reference, unless a reduced list of constituents is designated under 18 AAC 60.850(a); and (B) any additional analytes and parameters that the department determines are necessary based on site-specific conditions and the type of waste disposed in the facility; or(2) under an assessment monitoring program, monitor groundwater in accordance with 18 AAC 60.860 for (A) all analytes listed in 40 C.F.R. Part 258 , Appendix II, adopted by reference, unless a reduced list of constituents is designated under 18 AAC 60.860; and (B) any additional analytes and parameters that the department determines are necessary under the facility's detection monitoring program.(c) For purposes of (a)(1)(B) or (2)(B) or (B)(1)(B) or (2)(B) of this section, the department will determine which additional analytes and parameters are necessary on a case-by-case basis after considering the following factors:(1) the geological and hydrogeological characteristics of the site;(2) the impact of manmade and natural features on the effectiveness of groundwater monitoring;(3) climatic factors that might influence the reliability of groundwater monitoring procedures;(4) the effectiveness of indicator analytes and parameters in detecting a release; and(5) the characteristics of the waste disposed in the landfill.(d) For purposes of (a)(1)(B) or (2)(B) or (B)(1)(B) or (2)(B) of this section, the department may add analytes and parameters to the groundwater monitoring program by requiring a revision of the groundwater monitoring plan under 18 AAC 60.830(b) at any time during the active life of the facility based on the type of waste disposed in the facility and available analytical data. The department may also delete analytes and parameters from the groundwater monitoring program as specified in 18 AAC 60.850(a). Eff. 1/28/96, Register 137; am 10/29/98, Register 148; am 2/25/2022, Register 241, April 2022Authority:AS 44.46.020
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