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MMAGE ENV]RONMENTAL,1NC. 465 S.Meadows Pkwy,Ste.20 PMB 157 NU J 0 5 2007 Reno, NV 89521 Tel (775) 851-7239 November 1, 2007 ENVlRO NMf4T HEALTH Fax(775) 851-7240 PERMIT/SERVICES Mr. Harlin Knoll, Sr. R.E.H.S. San Joaquin County EHD 600 East Main Street Stockton, CA 95202-3029 Re: Well Abandonment Letter Report San Joaquin Catholic Cemetery, Stockton, California Global ID# T0607700348, USTCF Claim 41092 Dear Mr. Knoll: On behalf of the San Joaquin Catholic Cemetery (property owner), Ramage Environmental, Inc. is pleased to submit this Well Abandonment Letter Report to the San Joaquin County Environmental Health Division (EHD) and the Central Valley Regional Water Quality Control Board (RWQCB). On August 17, 2007, RWQCB issued a No Further Action Required Concurrence, and directed that the on-site monitoring and remediation wells be properly abandoned under county permit and inspection. On September 10, 2007, EHD issued Permit 40051888 to Doulos Environmental, Inc. (Doulos), a C-57 licensed drilling contractor (C-57 #730043)to abandon the wells. A copy of the approved permit is attached. On October 18, 2007, Doulos abandoned the fifteen wells associated with the subject site. The wells included monitoring wells (MW-1, MW-2, MW-3, MW-4, MW-5, MW-6, MW-7, MW-8A, and MW-8B), nested vapor extraction wells (VW-1S, VW-1D, VW-2S and VW-2D) and shallow vapor extraction wells (VW-3 and VW-4), The site and well locations are included on Figures 1, 2, and 3 (attached). Doulos pressure grouted the wells by filling them with a neat cement slurry from the bottom of the well to the surface using a tremie pipe. Once filled with cement, approximately 25 pounds per square inch (psi) of pressure was applied to each well, and held for approximately five minutes. If necessary, additional cement was added to top off the wells. The calculated and actual volumes of cement grout used to abandon each well are included on Table 1 (attached). As indicated on Table 1, the actual volume of cement used to fill the casing and filter pack exceeded the calculated volumes for each well, indicating that intrusion into the formation was achieved. Following pressure grouting, the well boxes and upper five feet of the well casings were removed by excavation, and mushroom caps were constructed over each of the abandoned wells.