AG 1993 07 06 - Laserfiche WebLink

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Task 1 - Draft Letter to the State Because of the issuance of the November 4, 1992 Amendment to Pern!i_'t No. 13-02, the closure requirements for the old fill area are unclear. The conditions of the amended permit state that several things be completed before and after waste is received into the approved vertical expansion of the "old fill area". Since the County has never received waste into the vertical expansion of the "old fall area", the f~rst task will be to draft a letter for the County to send to the Solid Waste Section stating that it is foregoing the vertical expansion and thus does not intend to comply with some of the conditions of the permit. CDM assumes that the terms of the Amendment to the Permit associated with the vertical expansion are no longer relevant and that the closure/post-closure plan for this area need only comply with the regulations for areas that stopped receiving waste prior to October 9, 1991. CDM will draft a letter for the County's submittal to the Section. Task 2 - Arrange Site Visit by Solid Waste Section CDM proposes to arrange a visit to the landfill by Mr. Julian Foscue of the Solid Waste Section to review the contents of the letter drafted in Task 1 and verify the conclusion that the "old fill area" will fall under the Category 1 closure requirements and that the vertical expansion area will fall under the Category 2 requirements. The remainder of this Amendment is based upon the assumption that the Section will agree with this conclusion. Task 3 - Identify On-Site Final Cover Soils Under th~task, CDM will assist the County in identifying an adequate sources of on-site soft. It is assumed the old fill area will require two feet of compacted earth while the recently completed vertical expansion area will require 18" of 1 x 10-5 cra/sec clay cover material in additional to 6" of topsoil. Based on a recent field visit, it is anticipated that some fill material will be cut from the demolition area and used as final cover material. A large stockpile from excess material from the fffing range was also noted during the visit and could be used as cover material. In addition, the County may identify other sources of on-site soils available for use in the final covers. CDM will collect have up to 10 bag samples of soil and have each tested to determine permeability. CDM will prepare a report which estimates the amount and type of cover material needed for the old fill area and the recently completed area. CDM will use the results of the soil tests to perform earthwork calculations to determine if an adequate amount of soil is available. Assuming that adequate soil is available on-site, CDM will meet with the Solid Waste Section to develop a testing program for the final cover that will satisfy them that an adequate depth of cover has been placed and that the in-sim permeability meets minimum specifications. Testing will probably involve Shelby sampling and laboratory analysis to determine in-sim pem~eabilities. n:'w, abarmsMmen d3-1 .cab Page 2 of 7