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Measurements acquired attendant to sampling appear on the <br /> well monitoring forms enclosed in Appendix A. <br /> Subsequent to the purging of each well , a groundwater <br /> sample was collected in a clean, disposable polyethylene <br /> bailer Each sample was transferred into one-liter amber <br /> glass sample bottles and Volatile Organic Analysis (VOA) <br /> vials containing sufficient hydrochloric acid preservative <br /> to reduce the pH of the sample to less than 2 .0 Each <br /> sample container was promptly fitted with a teflon-lined <br /> screw cap, labeled, placed on ice, and transported under <br /> chain of custody to Priority Environmental Labs of <br /> Milpitas , a California-state certified hazardous waste <br /> analytical laboratory Analyses were subsequently <br /> performed for Total Petroleum Hydrocarbons as Diesel <br /> (TPH-D) using EPA Methods 3510/8015, and Total Petroleum <br /> Hydrocarbons as Gasoline (TPH-G) , benzene, toluene, <br /> ethylbenzene, and total xylenes (BTEX) using EPA Methods <br /> 5030/8015-8020 (602) . <br /> Copies of the results of certified analyses as received <br /> from the certified are enclosed within Appendix A. <br /> These results are summarized and compared with previous <br /> sampling results in the following table: <br /> Table 3 <br /> Analytical Results of Groundwater Samples Acquired <br /> from Monitoring Wells MW-1 , MW-2 , and MW-3 at <br /> 275 Grant Line Road, Tracy, CA <br /> Sample Date <br /> & Depth to TPH-D TPH-G B T E X TOG <br /> Water ( ft) (ppb) (ppb) (ppb) (ppm) <br /> ----------------------------------------------------------- <br /> MW-1 <br /> 02/05/93 N.D. N.D N.D. N. D. N.D. N D. N.D. <br /> 7 . 97 ' <br /> 06/07-28/93 N D N. D N.D. N. D. N. D N D. N.D. <br /> 7 . 84 ' (6/7/93) <br /> 7 . 82 ' ( 6/28/93) <br /> 02/14/94 N. D. N. D. N.D. N. D. N D N D N.A <br /> 7 . 77 ' <br /> Page 7 <br />