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10 March 2000 <br /> AGE-NC Project No. 99-0628 <br /> Page 3of8 <br /> (Baumbach & Piazza) is presented in Appendix C. <br /> 3.4. SOIL SAMPLING <br /> Soil samples were collected from all three boring locations at depths between 4 feet and 59 feet <br /> (bsg), using a California split tube sampler loaded with three clean 2-inch by 6-inch brass sleeves. <br /> A 140-pound hammer was utilized to advance the sampler over an 18-inch interval ahead of the <br /> augers; the number of blows required to advance the sampler over each 6-inch increment was <br /> recorded on the boring logs. All sampling equipment was washed in an Alconox solution and rinsed <br /> twice with water prior to each sampling run. <br /> Both ends of the soil sleeve of each sample collected for laboratory analysis were covered with <br /> Teflon sheets, capped and sealed with tape. The preserved samples were labeled with boring <br /> designation,sample depth,date and time of sampling and the sample collector's initials. The samples <br /> were stored in a chilled container and transported under chain-of-custody to Precision Enviro-tech <br /> (PET) of Stockton, California, a Department of Health Services (DHS)-certified laboratory. <br /> 3.5. SOIL ANALYSES <br /> Selected samples were analyzed for the following: <br /> • Total petroleum hydrocarbons quantified as gasoline, diesel, and motor oil (TPH-g, TPH-d, <br /> _ and TPH-mo, respectively) in accordance with EPA Method 8015 Modified/DHS, <br /> • Volatile aromatic compounds:benzene,toluene,ethyl-benzene and total xylenes(BTEX)and <br /> methyl tertiary butyl ether (MTBE) in accordance with EPA Method 8260 Modified, and <br /> • CAM 17 Metals, TTLC - lead by EPA Method 7420, mercury by EPA Method 7471 A, and <br /> copper, nickel, zinc, cadmium, chromium and silver by EPA Method 6010. <br /> 3.6. SOIL LOGGING <br /> During drilling, auger returns were monitored for the presence of organic vapor using an organic <br /> vapor meter (OVM) equipped with a photo-ionization detector(PID: Thermo Environmental 580A, <br /> 10.0 eV, calibrated to isobutylene). Auger returns were placed on plastic and stored on the western <br /> edge of the site, pending laboratory analysis. <br /> Duplicate soil samples were extruded from their sleeve and were screened for the presence of organic <br /> Advanced Geo Environmental,Inc. <br />