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3.1.1 Soil Sampling <br /> Drilling was conducted by RESNA Drilling (C57# 622930) utilizing a hollow stem auger <br /> drill ng A field geologist continuously logged all drill cuttings and cored soil samples <br /> utilizing the Unified Soil Classification system (Appendix IV) Descriptions of soil types <br /> encountered and sample collection intervals are included on the boring/well logs <br /> ' (Appendix IV) Cored soil samples were collected at five foot intervals using a 2-inch <br /> diameter split-spoon sampler containing three brass tubes The cored samples and drill <br /> ' cuttings were characterized for soil type, moisture content, and evidence of petroleum <br /> contamination (i a soil discoloration or petroleum odors) Moreover, a photoionization <br /> ' detector (PID) was used as a screening device for the detection of petroleum hydrocarbon <br /> vapors in drill cuttings and cored samples Soil samples were tested with the PID <br /> (calibrated daily to an isobutylene standard) by placing a representative amount of <br /> material into a plastic bag and analyzing the headspace after a suitable period <br /> Two soil samples from each boring were submitted for laboratory analysis <br /> Samples were collected, preserved, and transported under chain-of-custody in accordance <br /> ' with RESNA's Quality Assurance/Quality Control (QA/QC) Plan, soil sampling protocol <br /> (Appendix V) The selected samples were analyzed for benzene, toluene, ethylbenzene, <br /> ' xylenes (BTEX) and total petroleum hydrocarbons as gasoline (TPHG) by EPA methods <br /> 8020 and modified 8015, respectively The method detection limit at RESNA <br /> ' Environmental for BTEX and TPHG in soil is 0 005 and 1 0 ppm, respectively <br /> Analytical results are summarized in Table 3 Laboratory data sheets are included in <br /> ' Appendix VI <br /> ' Soil cuttings generated during drilling were placed on and covered with 6 mil plastic <br /> sheeting and stockpiled on-site <br />' IPAR0492 TJL 4 <br />