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FEB -02-1996 13:25 FROM CA INTEGRATED WASTE MGNT TO 912094640138 P.04 <br />Road Landf ilf E=ansion (39 -AA -0001) • <br />Austin Ito .. <br />December 11., 1435 <br />Page 4 of 5 <br />table may at times prevent the excavation of cover material <br />from the borrow pit. This should be studied, and if' <br />necessary alternative sources of cover material identified. <br />Drainage system Capacity Requirements: Appendix D in Appendix 2 <br />To Meet the requirements of 14 CCIZ 17708, the RDS'—should <br />present the .assumptions, methods, and calculations used to <br />calculate the potential flow quantities for run-on, runoff, <br />and sediment content of storm water flow used in sizing <br />drainage and r4ediment control facilities. Some calculations <br />are presented., however, assu=tions are not. The. <br />methodology can be determined from the calculations. This <br />analysis should be done for a 100 year/24 hour storm event. <br />Calculations used to size the different parts of the <br />drairxage system shciuld be presented and clearly identified. <br />The location of the various parts of the drainage system <br />should be provided on a map. Additionally, the a system <br />capacity analysis of Little +Johns Creek realignment and the <br />adjoining flood -easement zone shauld be included in the <br />RDSI. <br />DISPOSAL SITE COSTRO GAS CONTROL T G <br />Monitoring system, Gas Control or Recovery system, Mcn,i,toring, <br />Gas Condensate Collection System, and Reporting <br />The RDSI should include the results of the gas monitoring <br />taken to meet the requirements of 14 CCR, 1.7258.23. <br />Additionally, owners or operators of all MSWLF units must <br />implement a routine_ methane monitoring program to ensure <br />that the standards of 14 CCR 17258.23(a) are met. This <br />information was not provided in the RDS1. <br />official coa=ea.ts on the fol3.owing sections are provided as part <br />of the review of the Preliminary Closure- and POstalcssure _ <br />Waiute—.noe plan. 'Therefore, the fol--16wiug comments are provided <br />o=ly as info.z=ati.cmal Items for this _40raator. <br />DESIGN CRLOW ATI90 <br />seismic stability: Addressed o=ly in FMS1 ma"ix, Page 30 <br />The-RDSS states that stability calculations ars not required <br />because the liner and cover slopes are less than'3:1. T' "i <br />thea-requirement of..14_ CCR 17777 (a)., but -does not. meet <br />_„e e� =equz,rencs of .14.. CCR .'7777 (b) or 4c) . Add -1onal: <br />lee CCIR _Y 7777 (c) requires a slope o:: foundation sCability <br />report.. Therefore a seismic stability analysis; which.. <br />includes a slope or foundation stability report, should be <br />orov_ded in this RDSI. <br />