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LEA Advisory 20 Attachment- Inspection Guidance for SW Landfills Page 29 of 52 or non-functional on the day of the inspection. A suspected leachate problem should immediately be brought to the attention of the appropriate RWQCB and Board. Through consultation with the RWQCB and Board, a determination should be made about whether interim actions are needed, pending test results, to contain the suspected leachate. 17709 Contact with Water No solid waste shall be deposited in such a manner that it has direct contact with either surface or ground water, except as approved by the California Regional Water Quality Control Board. If the inspector has evidence that waste is in contact with groundwater or observes waste in contact with surface or ground water (i.e., in trenches), the RWQCB should be informed. Subsurface records can be used to determine if solid waste is in contact with groundwater. Gas 17705 Gas Control Where the Enforcement Agency, the local fire control authority, or the Board has cause to believe a hazard or nuisance may be created by landfill decomposition gases, they shall so notify the owner. Thereafter, the site owner shall cause the site to be monitored for presence and movement of gases, and shall take necessary action to control such gases. The site owner shall inform the operator of any actions ordered by the Enforcement Agency, the local fire control authority or the board concerning gas control methods. The monitoring program shall be developed pursuant to the specifications of the above agencies. The monitoring program shall not be discontinued until authorized to do so in writing by the requiring agency. Results of the monitoring shall be submitted to the appropriate agencies. If monitoring indicates methane gas movement away from the site, the owner shall, within a period of time specified by the requiring agency, construct a gas control system approved by that agency. The agency may waive this requirement if satisfactory evidence is presented indicating that adjacent properties are safe from hazard or nuisance caused by methane gas movement. The operator shall duly inform the disposal site owner of possible landfill gas problems. This standard can be applied to a non-MSWLF which accepts putrescible wastes. Section 17258.23 (Explosive gases) is a more restrictive standard, requiring gas monitoring at all MSWLFs. Please refer to that section for further guidance. Dust 17706 Dust Control The operator shall take adequate measures to minimize the creation of dust. Throughout the inspection, the inspector should evaluate dust control visually. If excessive dust is observed and the operator has taken no steps to control it (e.g., water truck), the facility is violating this section. Dust is excessive when it obscures visibility, irritates eyes, hampers breathing and coats equipment and personnel. Dust control measures should be described in the RDSI. The RWQCB http://www.ciwmb.ca.gov/pe/advisory/20/attach2O/20attch l.htm 8/11/98