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I 05 July 2006 AGE-NC Project No. 97-0301 Page 2 of 2 PROCEDURES AGE proposes to properly destroy well MW-3 in accordance with Section 13 . 17 of the San Joaquin County Environmental Health Department Standards For Well Construction and Destruction in San Joaquin County. As required by EHD permitting, a health and safety plan will be prepared in accordance with Occupational Safety and Health Guidance Manual forHazardous Waste Site Activities (National Institute for Occupational Safety and Health Administration, U.S . Coast Guard and U. S . Environmental Protection Agency, 1985). Prior to drilling activities, the work area will be clearly marked and an utility clearance obtained through Underground Service Alert (USA). Prior to well abandonment activities at MW-3, abackhoe will be utilized to entirely expose the uppermost portion of of the 2-inch diameter PVC well casing from well MW-3 to determine its condition. The well will be sounded for total depth and checked for integrity; any obstruction found inside the well will be removed. Because the integrity of MW-3 was most likely compromised during the above referenced resurfacing activities, AGE is proposing to destroy the well by removing all material within the original borehole utilizing over-drill techniques. The abandonment of well MW-3 will be performed by Test America Drilling Corporation of Rancho Cordova utilizing a CME-75 mobile drill rig equipped with 10%4-inch hollow stem augers; well MW-3 will be over-drilled to a total depth of 50 feet bsg. The well casing from MW-3 will be removed from the over-drilled borehole and inspected by a representative of the SJCEHD. The above referenced well casing and drill cuttings will be containerized in properly labeled Department of Transportation (DOT)-approved model 17H 55 -gallon drums and stored on-site in an area lacking public access for future disposal. Total depth of the over-drilled boring for MW-3 will be measured. Thereafter, the excavated boring will be completely back filled with a cement grout mixture (Portland type II) in accordance with Section 13 . 12.5 . The grout mixture will consist of a ratio of six gallons water for every 94-pound sack of Portland type It cement. The drill rig hollow stem augers will be utilized as a tremie pipe during deployment of grout mixture. If you have any questions or require further information, please contact our office at (209) 467-1006. Sincerely, Advanced GeoEnvironmental, Inc. Z ot 9 . Timothy YCuellar Project Geologist Enclosures cc: Mr. David Atwater, Van De Pol Enterprises Advanced GeoEnvironmental, Inc.