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07 December 2012 AGE-NC Project No. 10-1801 Page 2 of 3 PROCEDURES Well destruction activities were performed between 24 September and 23 Oct by All Well Abandonment of Sacramento extraction wells MW-1 MW_2 California. Groundwater ober and 10A/B/C/D, MW-118, MW-3A, MW-5A, MW-56 monitoring and EW-7A/BandEW-10' A, MW-13A/8, MW-19A/8 MW-8A,through EW-5, E MW_ Type II cement six EW-1 through swith Portland for Y y pressure grouting the well columns with Portland pressure grouted well was filled torthe topery of the casing sack of Portland cement). Each Pounds per square inch, for a minimum of 5 minutes, to allow grout to enter the screened interval. Following pressurization, the u g and then pressurized at 25 to 30 of each well was destroyed by over-drilling using hollow stem augers or hand digging tand manually removing the exposed casing. Each well box was then removed and the surface was finished with a concrete mixture (selected locations were later refinished with asphalt). Groundwater monitoring and extraction wells MW-3B/C, MW-4B/4C, MW-66/C, MW-7A/B, MW-8B, MW-20B, EW-8B and EW-9B were removed by over-drilling the wells to total depths of 25 feet bsg (MW-7A), 40 feet bsg (MW-36), 50 feet bsg (MW-7B M 20B, EW-8 and EW-9B), 51 feet bsg (MW-46 and MW-6B), 74 feet bsg (MW-( CW_8B MW_ ), 75 feet bsg (MW-3C) and 76 feet bsg (MW-4C) with either 8-inch and 10-inch diameter hollow stem augers. Following over-drilling, each well was grouted to near surface using a Portland cement grout mixture,well boxes were removed and the surfaces at each location were completed with a concrete mixture (selected locations were later refinished with asphalt). Groundwater monitoring wells MW-4A and MW-20A were removed using the "popsicle" method. Initially, a winch-line was secured around each of casing and was used to pull the casing up approximately two feet out of the borehole. Once the casing was initially pulled out, the bottom of the casing was destroyed and the void space of the casing was filled with a Portland cement. Once the initial Portland cement was applied, the existing casing was pulled out in its entirety. Once the casing was removed and the void space of the former casing was filled with cement, the well locations were overdrilled to a depth of three feet bsg to remove the residual grout seal. Once the drilling was complete the overdrilled borehole was filled with cement and the surface was finished with a concrete mixture. on 23 October 2012, a twenty yard soil bin containing approximately 10 tons of non- hazardous waste that was generated during well destruction activities was transported under non-hazardous waste manifest by Delta Oil Field Services of Woodland, California to Forward Landfill of Manteca, California. On 24 October 2012, seven drums (consolidated into 3.5 drums) of non-hazardous waste, generated during destruction activities, was transported and disposed of under manifest by Instrat Inc. of Rio Vista, Ca forni8. Non-hazardous waste manifests documenting the waste disposals are included Advanced CeoEnvironmental,Inc.