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r <br /> Problem Assessment Report December 5, 1989 <br /> USA Petroleum Station No. 65, Lodi, California AGS 87050-3 <br /> i <br /> Groundwater samples were collected with a Teflon bailer that had been washed with <br /> Alconox and rinsed with deionized water before use in each well. The bailer was lower ad <br /> to a point about 3 feet below the air-water interface to retrieve a sample of the <br /> f. groundwater. The samples were slowly transferred to laboratory-cleaned sample containers. <br /> Water was transferred to laboratory-cleaned, 40-milliliter glass vials. Concentrated <br /> hydrochloric acid was added to each vial as a preservative. The sample containers were <br /> then labeled and placed in iced storage. Chain of Custody Records were initiated by the <br /> field geologist and accompanied the samples to the analytical laboratory. <br /> a ' <br /> The drums containing the water from developing and sampling were labeled and <br /> temporarily stored onsite pending laboratory results. ed <br /> u�r petrol um o��'iisrfie datt[Q , <br /> iitrt�: tt "_T �idAhautttrittrted * <br /> Ground-Water Well Survey <br /> i <br /> Moldenhauer Engineering Company of Davis, California, (RCE No. 17381) surveyed the <br /> elevations and positions (Y and "y" lateral coordinates) of the monitoring wellheads of <br /> monitoring wells MW-1 through h1W-7 and wells S-1 and S-2 on April 18, 1489. Tlie <br /> i <br /> results.of the survey are included in Appendix C. The monitoring wells were measured <br /> 23 <br /> i <br /> a AR)71100f GeOS)AStelnS <br /> .: . .... .:.. <br /> r <br />