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18 November 1996 <br /> AGE-NC Project No. 96-0265 <br /> Page 2 of 2 <br /> SOIL PROBE BORINGS AND SAMPLING <br /> On 29 October 1996, two soil probe borings were advanced at the site. The probe borings were <br /> advanced to maximum depths of 25 beet bsg. Probe boring P 1 was advanced in the southern portion <br /> of the site, in the vicinity of the former UST. Probe boring P2 was advanced at the northern property <br /> boundary, in the vicinity of a former UST on the adjacent property. Soil samples were collected <br /> using AGE's van-mounted Geoprobe 5400 soil probing machine equipped with a 2.15-inch diameter <br /> soil sampler on the leading end of the probe rods. <br /> Discrete soil samples were collected in each probe boring at 5-foot intervals beginning at a depth of <br /> 10 feet bsg using four 1.125-inch by 6-inch length brass sleeves in the two-foot long, piston type- <br /> sampler. The sampling equipment was washed in an Alconox solution and rinsed with water prior <br /> to each sampling run to avoid cross-contamination. <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 transported under chain-of- <br /> custody to Me Campbell Analytical, Inc. (114A1) in Pacheco, California. The samples were analyzed <br /> for total petroleum hydrocarbons quantified as gasoline (TPH-g), volatile aromatic compounds <br /> (benzene,toluene,ethyl benzene and total xylene: BTE&X)with methyl tertiaiy butyl ether(MTBE) <br /> in accordance with EPA methods 8015m and 602, respectively. <br /> Soil samples collected from a depth of 15 feet and 20 feet bsg from each probe boring were <br /> analyzed. Petroleum hydrocarbons were not detected in the soil samples analyzed from the site <br /> investigation. The laboratory report (MAI Laboratory ID 70742 to 70745), chain-of-custody form <br /> and quality control data are attached. <br /> The opportunity to provide this service is greatly appreciated. If you have any questions regarding <br /> this matter,please contact our Stockton office at (209) 956-0264. <br /> Sincerely, <br /> Advanced GeoEnvironmental, Inc. <br /> w <br /> William Little <br /> Staff Geologist <br /> Enclosures cc: /Mr. Steve Sasson - PHS-EHD <br />