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LEA Advisory 20 Attachment- Inspection Guidance for SW Landfills Page 23 of 52 settlement of the fill surface. Other effective maintenance methods maybe allowed by the Enforcement Agency. A violation of this section should be considered if, during the inspection, there is evidence of extensive ponding or poor lateral runoff(e.g., a smooth silt layer) on fill surfaces due to subsidence or improper grading. A violation may be cited, if, during dry weather, there are extensive depressions that could allow ponding should precipitation occur, or grading of fill surfaces does not promote lateral runoff. The operator should be encouraged to conduct periodic surveys to determine if the grades of fill surfaces are adequate. Note: The RWQCB requires that closed landfills be provided with slopes of at least three percent (23 CCR section 258 1) and should be informed if grading problems are identified during an inspection. Cover 17680 Stockpiling Where cover material or unsuitable native material is being stockpiled on the site for use or removal, it shall be placed so as not to cause problems or interference with unloading, spreading, compacting, access, safety, drainage, or other pertinent factors. No further guidance. 17681 Availability of Cover Arrangements must be made by the site operator for sufficient quantity of cover material of a suitable quality to meet the requirements of these standards. If on-site sources of cover material are insufficient, substantiation must be shown to the Enforcement Agency that an adequate supply of cover material will be provided. No further guidance. 17682 Cover In order to effectively prevent propagation or attraction of flies, rodents or other vectors; to control landfill fires; to prevent the creation of nuisances, cover material compacted to a minimum thickness of six (6) inches shall be placed over all surfaces of the compacted Group I and II wastes except for tree stumps and large brush at the landfill on a frequency of not less than the following periods: . Tonnage greater than 50 per day. . . .daily cover . Tonnage from 5 to 50 per day . . . . .48 hours . Tonnage from 1 to 5 per day. . . . . .96 hours . Tonnage less than l per day. . . . . .as determined by the enforcement agency The Board shall consider any application for different cover and compaction requirements for special operating practices such as landfilling shredded waste. Group I is an obsolete term for hazardous and designated wastes. Group II is an outdated term for http://www.ciwmb.ca.gov/pe/advisory/20/attach20/20attch l.htm 8/11/98