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`. ....1 <br /> �. 26 February 1996 <br /> AGE-NC Project No. 95-0152 <br /> Page 4 of 6 <br /> sampling was performed using a metric soil sampler loaded with two clean 2- by 3-inch brass sleeves. <br /> The ends of the lead sleeve were covered with teflon sheets, capped and sealed with tape. The sample <br /> was preserved in a container under ice and transported to a CAL for analysis of TPH-g, BTE&X, and <br /> methyl-tert-butyl-ether(MTBE). Analytical results of stockpile soil sample are included in Table 4. <br /> The laboratory report and chain-of-custody are included in Appendix D. <br /> ` 3.5. EQUIPMENT DECONTAMINATION <br /> All sampling tools and brass sleeves used for sample collection were thoroughly rinsed with clean <br /> ` water after washing with a solution of Alconox. All Geoprobe rods were cleaned prior to <br /> advancement in each soil probe boring. <br /> 3.6. BORING LOGS <br /> During drilling activities, sample duplicates were described on boring logs using the Unified Soil <br /> Classification System (USCS), and monitored for the presence of organic vapors using a photo- <br /> ionization detector(PID: Thermo Environmental 580A, 10.0 eV, calibrated to isobutylene). Boring <br /> logs are summarized in Appendix A. <br /> 4.0. FINDINGS <br /> 4.1. SOIL PROFILE <br /> In each soil probe boring, the general soil profile consisted of dark gray, partially-cemented, fine- <br /> grained silty sand from surface grade to depths of 23 feet bsg. Grey to brown, cemented, clayey silt <br /> was encountered from depths of 23 to 30 feet bsg. Grey to green, partially-cemented, fine- to <br /> medium- grained silty sand was encountered from 30 to 40 feet bsg in each probing. <br /> Organic vapors were detected in all excavation soil samples and soil probing samples from P 1 at <br /> concentrations up to 2,200 parts per million (ppm). No OVs were detected in samples from soil <br /> probes P2, P3 or P4. <br /> 4.2. LABORATORY RESULTS OF EXCAVATION SOIL SAMPLES <br /> TPH-g was detected in excavation soil samples at concentrations ranging from 770 ppm (B5, floor <br /> of excavation)to 3,500 ppm(B 1, west wall of excavation). Toluene, ethyl benzene and xylenes were <br /> detected in each excavation soil sample at concentrations up to 360 ppm (B1, west wall of <br />