18 AAC 60.365. Co-disposal of sewage solids

(a) The requirements of this section apply to the owner or operator of a municipal solid waste landfill that co-disposes of sewage solids within the boundaries of the MSWLF.

(b) Sewage solids may not be placed in an active MSWLF if they are regulated hazardous wastes, are regulated under 18 AAC 60.020(a) , or if they contain concentrations of polychlorinated biphenyls (PCB) wastes defined in 40 C.F.R. 761.3, revised as of July 1, 1998, adopted by reference.

(c) Sewage solids may not be placed in an active MSWLF if they contain "free liquids" as defined by EPA Method 9095 (Paint Filter Liquids Test), as described in Test Methods for Evaluating Solid Waste, Physical/Chemical Methods, (SW 846), Third Edition, inlcuding Final Update III (December 1996), adopted by reference.

(d) If sewage solids are placed in a MSWLF, the owner or operator shall meet the vector reduction requirement in 40 C.F.R. 503.33(b)(11), adopted by reference in 18 AAC 60.505, or one of the

(1) Class A or Class B pathogen reduction requirements in 40 C.F.R. 503.32, adopted by reference in 18 AAC 60.505; and

(2) the vector attraction reduction requirements of 40 C.F.R. 503.33(b)(1) - (10), adopted by reference in 18 AAC 60.505.

(e) The owner or operator of a Class III MSWLF may dispose of up to 2,500 gallons of septage per day in trenches at the landfill if the owner or operator

(1) constructs and fills one septage disposal trench at a time, ensuring that the trench has at least one square foot of wetted surface for each gallon of material disposed on any day;

(2) maintains at least a four-foot separation distance between the seasonal high groundwater and the base of the trench;

(3) constructs each trench in sandy soil with a hydraulic conductivity no less than 1 x 10 4 centimeters per second and no greater than one centimeter per second;

(4) adds hydrated lime or quicklime in a dry form so that a pH of 12 is maintained in the septage for at least 30 minutes; and

(5) ensures that septage does not overflow the trench or accumulate more than four feet in depth of liquid.

History: Eff. 1/28/96, Register 137; am 10/29/98, Register 148; am 7/11/99, Register 151; am 9/7/2002, Register 163

Authority: AS 44.46.020

Editor's note: Test Methods for Evaluating Solid Waste, Physical/Chemical Methods, (SW-846), adopted by reference in 18 AAC 60.365 is available from National Technical Information Services, United States Department of Commerce, 5285 Port Royal Road, Springfield, Virginia 22161. It may also be reviewed at the department's Anchorage, Fairbanks, and Juneau offices, and is on file in the Lieutenant Governor's Office.

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