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qq <br /> Ms. Lori Duncan Page 5 of 5 <br /> San Joaquin County Environmental Health Department <br /> August 27, 2004 <br /> Groundwater samples will be collected from the groundwater monitoring wells no less than 48 <br /> hours after development. The groundwater samples will be analyzed for GRO, BTEX, and fuel <br /> oxygenates by EPA Method 8260B . <br /> Purge water generated during well development will be pumped into a Blaine Tech track-mounted <br /> water tank. The water will then be transported to the Blaine Tech holding facility in Sacramento, <br /> California. Dillard Environmental Services will then dispose of the water at the Altamont <br /> Resource and Recovery Facility in Altamont, California. <br /> The well locations will be surveyed with respect to northing and easting positions. The top-of- <br /> casing elevations will be surveyed with respect to mean sea level (msl). <br /> Report Preparation <br /> Following receipt of analytical results, a report will be prepared summarizing the results of the <br /> investigation. Soil boring logs, well construction details, and tabulated data will be included in the <br /> report. <br /> Schedule <br /> Pending receipt of workplan approval from SJCEHD and access agreements from off-site property <br /> owners, URS estimates that implementation will require approximately 12 to 16 weeks. <br /> If you have any questions or comments regarding this letter, please call Mr. Vernon Elarth at (916) <br /> 679-2299. <br /> Sincerely, <br /> URS Corporation Americas <br /> a <br /> /L No. 71Z .. <br /> Exp, 1 O <br /> * <br /> Matthew Farris Vernon Elarth, R.G <br /> Staff Geologist Project Manager OF CAOF <br /> Attachments: Figure 1 — Site Location Map <br /> Figure2 — Site Plan with Proposed Boring Locations <br /> Attachment A— SJCEHD Correspondence <br /> cc: Mr. Paul Supple, Atlantic Richfield Company <br /> I <br /> KAWprocessV5 BP ARCO\00548\2004 well install\WP 04.doe <br />