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Page 43 II �t Dust control measures would include watering or spreading dust suppressing chemicals on unpaved roadways,paving the main access road,dumping materials at minimum heights necessary for clearance, maintaining low vehicle speeds,conducting routine road maintenance,and minimizing disturbed, unvegetated area. Mud control would be accomplished by proper grading of interior dirt roads. Noise control would consist of operating the landfill only during permitted hours,maintaining a buffer zone,and taking noise measurements if complaint(s)are received. Odor would be controlled by the application of cover material and capture of landfill gas. Fire would be controlled by monitoring incoming loads and the surface of the landfill, and isolating ` and/or covering any refuse. Anon-site water tank truck,emergency assistance, and an on-site well would be available. l On-site trafficywould be controlled by signs and the scale house attendant,and personnel at the working face if needed. I t Environmental Monitoring Environmental Monitoring would include groundwater,surface water, leak detection, landfill gas, hazardous waste and operations. �». The Austin Road Landfill has had a groundwater monitoring program since December 16, 1977,ordered ' # by the Regional Water Quality Control Board(RWQCB),which includes 13 monitoring wells. The ' expansion would require up to seven new monitoring wells to be installed prior to operation of Phase l of the expansion area,in addition to the existing monitoring wells. E The landfill is currently under a Corrective Action Plan(CAP)for groundwater contamination(volatile , organic compounds). To comply with the CAP,an extraction and treatment system has been installed to mitigate detected chlorinated hydrocarbon in the first encountered groundwater beneath the Austin Road Rt't� Landfill. The system is currently operating and will continue to operate until the constituents of concern are no longer impacting groundwater. The RWQCB requires surface water monitoring of the North Branch of the South Fork of Little Johns Creek,upstream and downstream of the landfill,on a quarterly basis. FThe RWQCB also requires monitoring of influent to and effluent from the groundwater treatment system, and receiving water at both upstream and downstream locations,at varying frequencies depending on the constituent. The Leak Detection System would sample from a drainage point beneath the low point of the landfill liner and calculate leakage rates on a monthly basis. - 4 Twelve new extraction wells were installed in 1998 to correct a landfill gas migration problem in the northeast portion of the landfill. The problem was corrected as of November 1998. Nine new monitoring probes are proposed for installation around the expanded landfill. Hazardous waste would be controlled through signage and loadchecking. GR4SSETTI ENVIRONMENTAL CONSULTING F :