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Tom Horton <br /> Page 3 <br /> 5. The leachate testing figure (p. 31) is in error. The figure <br /> ($335 x 5) must be multiplied by four to reflect quarterly <br /> monitoring. <br /> 5. Methane gas monitoring was proposed for all structures within <br /> 1000 feet of the landfill. No cost estimate was given. <br /> The operator is required to revise the cost estimates for closure <br /> and postclosure maintenance in accordance with 14 CCR 18263 (b) and <br /> 18266 (b) and be adjusted to reflect the above changes, those <br /> deficiencies outlined in the Board's review letter of September 10, <br /> 1990, and in the regional water board's review letter dated August <br /> 22 , 1990. <br /> The financial mechanism for closure and postclosure maintenance is <br /> required to be adjusted to reflect the revised cost estimates. <br /> The preliminary closure/postclosure maintenance plan will be <br /> scheduled for approval when the deficiencies are corrected and <br /> letters of approval are received from the local enforcement agency <br /> and regional water board. The revised plan must be submitted to <br /> the local enforcement agency, the Board, and regional water Board <br /> on or before November 15, 1990. <br /> If you have any questions concerning the review of the preliminary <br /> closure/postclosure maintenance plan please contact Kim A. Schwab <br /> at (916) 322-2653 . <br /> Sincerely, <br /> Don Dier, Jr. , P.E. <br /> Manager, Permits Division <br /> DD:kas <br /> schwab\closure\39AA0022 .R <br /> cc: Executive Officer, Central Valley Regional Water Quality <br /> Control Board -- _ <br /> Ron Valinoti, San Joaquin County Environmental Health Division <br /> Bill Orr, Advanced Technology Division, CIWMB <br /> Bernie Vlach, Enforcement Division, CIWMB <br /> Maureen Morrison, Legal Office, CIWMB <br /> Dennis Meyers, Contracts\Finance Branch, CIWMB <br />