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SOIL SAMPLING AND LABORATORY ANALYSIS <br /> Soil sampling was performed on October 15, 1993. A representative of the San Joaquin <br /> County Public Health Services, Environmental Health Division (PHS-EHD), Mr. Bill Snavely, <br /> was present during soil sampling activities. The location of the soil sample in the tank <br /> excavation shown in Figure 3 (Appendix A) and was chosen by Bill Snavely. Soil samples <br /> were collected by Mr. David Castro, an LLNL Environmental Protection Department <br /> Sampling Technician. Soil sample collection was witnessed and documented by Mr. Nick <br /> Giuntoli, a Kaiser Engineers Livermore Environmental Scientist Il. One tank excavation soil <br /> sample was collected from the bucket of the backhoe. One soil sample was collected from <br /> each of two excavated soil piles. Soil samples were collected in decontaminated stainless <br /> steel tubes leaving no headspace. The ends of each tube were covered with a Teflon® <br /> sheet and sealed with plastic end caps. Samples were labeled with their sample <br /> identification number and date of collection. All samples were stored in a cooler on ice and <br /> logged on to a Chain of Custody Sheet, see Appendix D. All samples were delivered to <br /> California Laboratory Services, Inc. (California Laboratory Certification Number 1233) on <br /> October 18, 1993. Soil samples were analyzed for Total Petroleum Hydrocarbons (TPH) as <br /> Diesel by Environmental Protection Agency (EPA) method modified 8015 and benzene, <br /> toluene, ethyl benzene and xylene (BTEX) by EPA method modified 8015. The laboratory <br /> analytical results are summarized in Table 1 and included along with the chain of custody <br /> record as Appendix D. <br /> Table 1: Summary of the laboratory analytical results for soil samples collected during <br /> the closure of UST 830-D1 U1 on October 15, 1993. <br /> SIrpl tditil1.1111,rnlkrltlts C+ >riEc3lr� rtiin <br /> TV <br /> rail tell <br /> TK-830-D1 U1-RH-01-126 TPH as Diesel 290 <br /> Benzene ND <br /> (126 inches below grade) Toluene ND <br /> Ethyl benzene 0.010 <br /> Xylene 0.024 <br /> SP-830-D1 U1-RH-0I-COM TPH as Diesel 4,700 <br /> Benzene ND <br /> (Soil Pile) Toluene 0.006 <br /> Ethyl benzene 0.026 <br /> X lene 0.084 <br /> SP-830-D1 U1-RH-02-COM TPH as Diesel ND <br /> Benzene ND <br /> (Soil Pile) Toluene ND <br /> Ethyl benzene ND <br /> Xylene ND <br /> NOTE: <br /> ND=Not detected above laboratory detection limits. <br /> ppm=parts per million <br /> POST-TANK REMOVAL ACTIVITIES <br /> UST 830-D1 U1 and the tank system piping, were transported as hazardous waste by LLNL <br /> to Erickson Enterprises in Richmond, California on October 15, 1993. A copy of the Uniform <br /> Hazardous Waste Manifest is included as Appendix E. The excavation was secured with <br /> plastic fencing pending the laboratory results of the soil samples. <br /> UST 830 CLOSURE REPORT <br /> -2- <br />