SITE INFORMATION AND CORRESPONDENCE

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10-22-1991 oe:seAM FWIERSON DRIIING. 14640138 P.02 Adgm PjNaSON DE4 = CLING P.O. Box 4931 Modesto, CA 95352 i! YY.Y 209-545-2838 FAX: 209-545-3853 October 17, 1991 San Joaquin County Health Services ATTN: Mr Mike Infurna P.O. Box 2009 Stockton, CA 95201 Dear Mr Infurna, IV& w On August 28, 1991, our equipment, a drill rig,was vandalized at a work site in Stockton, CA. During this act, the neighbors of the work site noticed fuel slowly leaking on the ground and reported to the local fire department that a potentially dangerous situation existed . When the fire department responded, the fuel still leaking was caught in five gallon buckets and contained in a fifty five gallon drum. Since the tank of the drill rig is fifty gallon capacity, minus estimated usage for the previous days ' work (approximately 10 gallons), and the amount the fire department recovered (approximately 30 gallons), we estimate the escaping portion of the fuel to be 10 gallons, which would have had ground surface contact. Visual inspection indicated the spillage to be approximately 3 ' x 4 ' across. As an emergency precaution, the area that was visibly contaminated was excavated to a depth of approximately 11 . We propose to further excavate the indicated area and hand sample to establish the depth of saturation on the near surface . The affected soils are to be contained in secured, fifty five gallon drums for disposal . We sincerely hope this plan meets your approval and wish to express our willingness, to act in a responsible manner, as any environmentally conscientious person's attitude should reflect. Please advise this office of your decision, or any changes you feel should be made . Respectfully submitted, Pierson Drilling Paul Pierson, Owner PRP/cjg TrIlIrc1 P S!"