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10 October 1997 <br /> AGE NC Project No. 97-0298 <br /> Page 3 of 5 <br /> Upon sample retrieval,both ends of the second brass sleeve were covered with Teflon sheets,capped <br /> and sealed with tape. Samples were then placed in a chilled container and relinquished to OnSite <br /> Environmental Laboratory, Inc., (OEL) from Fremont, California. Each sample collected was <br /> analyzed for total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA <br /> Method 8015-M,and for volatile aromatics(benzene,toluene,ethyl benzene and xylenes:BTE&X) <br /> with methyl-tert-butyl ether(MTBE) in accordance with EPA Method 8260. <br /> 3.2. SOIL LOGGING <br /> Soil was extruded from the remaining brass sleeves and screened for the presence of organic vapor <br /> using an organic vapor meter equipped with a photo-ionization detector (PID: Thermo <br /> Environmental 580A, 10.0 eV, calibrated to isobutylene), and the readings were recorded on the <br /> Boring Logs, included in Appendix A. The soil was described in accordance with the Unified Soil <br /> Classification System (ASTM D-2487). <br /> 3.3. GRAB GROUND WATER SAMPLE COLLECTION <br /> A grab ground water sample was collected from probe boring P 1 using a Geoprobe water sampling <br /> assembly. Probe rods were extended into ground water,then pulled back to expose a water sampler <br /> screen interval. Ground water was allowed to enter the sampler, and samples were retrieved using <br /> a modified PVC tubing bailer. <br /> The sample was collected in 40-m1 EPA-approved VOA vials containing hydrochloric acid for <br /> sample preservation. The sample was placed in a chilled container and was relinquished to OEL. The <br /> water sample was analyzed for total petroleum hydrocarbons quantified as gasoline(TPH-g)and for <br /> volatile aromatics (benzene,toluene, ethyl benzene and xylenes: BTE&X) in accordance with EPA <br /> method 8260. <br /> 4.0. FINDINGS <br /> 4.1. STRATIGRAPHY <br /> During the installation of the soil probe borings brown, moist silty clay was encountered at depths <br /> of 5 feet and 10 feet bsg. Silty sand and sandy silt was encountered at 15 feet bsg. Silty sand was <br /> encountered at 20 feet bsg. A dry indurated clay layer was encountered at a depth of 25 feet bsg in <br /> P-1, where silty sand was encountered at 30 feet and 35 feet bsg. <br />