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• r S • a <br /> d <br /> . 10 March 1998 <br /> AGE-NC Project No 95-0135 <br />' Page 3 of 9 , <br /> Boring Logs The soil was described in accordance with the Unified Soil Classification System Soil <br /> r Boring Logs are attached in Appendix A <br /> 3 1 3 GRAB GROUND WATER SAMPLE COLLECTION <br />' Grab ground water samples were collected from probe borings B I and B2, using a temporary PVC <br /> screen in the saturated zone Ground water was allowed to enter the casing, and samples were <br /> retrieved using a modified PVC tubing bailer <br /> After sample retrieval,the water sampler was disassembled and cleaned New PVC tubing was used <br /> to collect each sample Water samples were collected into 40-m1 EPA-approved VOA vials <br /> containing 0 5 ml 18% hydrochloric acid for sample preservation The samples were placed in a <br /> chilled container under ice and transported under chain-of-custody to MAI for analysis <br /> r , <br /> y 3 14 LABORATORY ANALYSIS OF SOIL AND GROUND WATER SAMPLES <br /> Selected soil and ground water samples were analyzed in accordance with EPA Method 503018015- <br /> M for total petroleum hydrocarbons quantified as gasoline(TPH-g),in accordance with EPA Method <br /> 8020 for volatile aromatics (benzene, toluene, ethyl benzene and xylenes BTE&X), and in <br /> accordance with EPA Method 8020 Grab water samples were analyzed for methyl-tert-butyl ether <br /> (MTBE) in accordance with EPA Method /8260m <br /> 3 2 MONITORING WELL INSTALLATION <br /> 3 2 1 DRILLING AND SOIL SAMPLING <br />' On 08 to I I September 1997, soil borings B4, B5 and B6 were drilled and completed as ground <br /> water monitoring wells Boring B4 (MW-1) was established at the western edge of the station <br /> parking lot, boring B5 (MW-2) was advanced at the north end of the drive way entrance to the <br /> parking lot and boring B6 (MW-3) was advanced at the east edge of the parking lot <br /> r <br /> _ The installation of wells was performed using a truck-mounted CME 75-HT drill ng equipped with <br /> continuous flight, I0-inch, hollow-stem augers The drill rig and two-man crew were supplied by <br /> Soils Exploration Services (SES) of Benicia, California <br /> Samples were collected from bona B4 and B5 continuously a split tube -I <br /> P g ously using p , 3 rich diameter core <br /> sampler The sampler was advance with the progression of the boring and soil sample were collected <br /> Advanced G eoEnvi ron mental,Inc <br />