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29 September 1995 <br /> AGE-NC Protect No 95-0139 <br />' Page 5 of 7 <br /> 3 3 COLLECTION OF GROUND WATER SAMPLES <br /> Water samples were collected from each well using disposable plastic bailers The samples were <br /> transferred into 40-m1 EPA vials preserved with hydrochloric acid and 1-liter amber bottles The <br /> samples were then placed in a chilled container and transported under chain-of-custody to Western <br /> Environmental Science& Technology(WEST) in Davis, California <br /> Each water sample was analyzed for TPH g and TPH d and BTEX in accordance with EPA methods <br /> 5030/8015m and 602, respectively <br /> 4.0. FINDINGS <br />' 41 LABORATORY RESULTS OF EXCAVATION SOIL SAMPLES <br /> TPH-g and TPH-d were detected in samples N-2, W-1, W-2 and W-3 at concentrations from 9 4 ppm <br /> to 210 ppm Benzene was detected only in sample W-3 at a concentration of 0 011 pprn No <br /> petroleum hydrocarbons were detected in excavation samples S-1, S-2, N-1, F-1 and F-2 Analytical <br /> results of the excavation soil samples are summarized in Table 1 The analytical results and chain-of- <br /> custody are included in Appendix C <br /> SAMPLES <br /> 42 LABORATORY RESULTS OF STOCKPILE SOIL SA <br />' TPH-d was detected in sample SPI-2 and SPI-3 at concentrations of 22 ppm and 3 6 ppm <br /> respectively No other petroleum hydrocarbons were detected in the samples collected from Stockpile <br /> No 1 TPH-g, TPH-d,toluene ethylbenzene and xylenes were detected in the five composite samples <br /> from Stockpile No 2 Benzene was detected only in sample SP2-17 to SP2-20 at a concentration of <br /> 0 008 ppm Total lead "was detected in samples SP2-1 to SP24 and SP2-13 to SP2-16 at <br /> concentrations of 13 ppm and 12 ppm, respectively Analytical results of the stockpile samples are <br /> summarized in Table 2 The laboratory report and chain-of-custody forms are included in Appendix <br /> D <br /> J <br /> 43 ANALYTICAL RESULTS OF DE-WATERING TANK SAMPLES <br /> TPH-d was detected in the February 1995 composite sample collected from the dewatering tanks at <br /> a concentration of 220 ppb TPH-g and BTE&X were not detected in this sample TPH-d was <br />' detected in the March 1995 sample from Tank #2 at a concentration of 4 0 ppb TPH-d was not <br /> detected in the March 1995 sample from Tank #1 The analytical results of the dewatering tank <br /> samples are summarized on Table 3 The laboratory report and chain-of-custody forms are included <br /> 1 <br />