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` Mr.Jeffrey Wong May 26,2010 Page 2 �-- Piping Removal and Disposal Prior to removal of the piping,permits were obtained from the Stockton Fire Department (SFD)and the San Joaquin County Environmental Health Department(SJCEHD). The SJCEHD was then notified of the date of planned removal activities. Following issuance �. of the original permit,the SJCEHD issued revised permits dated March 30, 2010 and May 13, 2010. Copies of the permits, revisions, and regulatory correspondence are included in Attachment 2. On May 3, 2010, Gettler-Ryan personnel disconnected the fuel piping leading from the UST to the generator. The piping was then plugged and removed from the secondary containment. Fuel within the piping was drained back into the UST, and the piping then placed into a 20-yard closed top bin. The vent line piping was then removed from its secondary containment and placed in the bin. All removed piping was observed to be in good condition, with no holes or indications of leakage observed. Following removal, the fuel and vent piping was transported off-site by Ecology Control Industries(ECI)to their facility in Richmond, California for disposal under hazardous waste manifest number r, 002135673 JJK. Copies of the manifest and certificate of destruction for the piping are included in Attachment 3. Soil Sampling Activities On May 3, 2010, one soil sample, labeled PL-1, was collected from the pipeline excavation under the direction and supervision of Mr. Jeffrey Wong with the SJCEHD w..�, (Figure 2). Prior to collecting the soil sample, a hand auger was used to uncover.native. soil to a depth of approximately 2 feet below surface grade (bsg),one foot below the base of the piping trench. The soil sample was then collected using a brass sample tube. Following collection, the sample was labeled and placed into an insulated chest with ice pending transport to the analytical laboratory. A copy of the chain-of-custody documentation is included in Attachment 4. W Laboratory Analysis and Results The soil sample was submitted to McCampbell Analytical, Inc.,a DHS-certified �- laboratory located in Pittsburgh, California, for analysis for total petroleum hydrocarbons as diesel (TPH-D) via EPA Method 8015B,and for benzene, toluene, ethylbenzene, and xylenes (BTEX) constituents via EPA Method 8260B. Sample analytical results were requested on a same day turnaround, and were forwarded by the laboratory directly to Mr. Jeffrey Wong of the SJCEHD. No analytes were detected in the soil sample. Results are summarized in Table 1 and depicted on Figure 3. In an email dated May 3, 2010,the SJCEHD granted permission to backfill the excavation. A copy of the laboratory analytical report is included in Attachment 4, with a copy of the regulatory correspondence included in Attachment 5. Fire Department Inspection Record ` On May 13, 2010, the SFD performed an inspection of the newly-installed piping leading ,� from the UST to the emergency backup generator. The SFD inspector subsequently