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URS <br /> Ms Vickie McCartney, RF-14S Page 6 <br /> . San Joaquin County Environmental Health Department <br /> ARCO 2186 <br /> CONCLUSIONS AND RECOMMENDATIONS <br /> Based on the data collected during this assessment, site groundwater in the vicinity of well AW-1 has <br /> been impacted by petroleum hydrocarbons Groundwater monitoring well MW-8 has been added to the <br /> quarterly groundwater monitoring schedule URS will evaluate trends in gasoline-related hydrocarbon <br /> concentrations in MW-8 to assess whether characterization of the vertical extent of the gasoline-related <br /> hydrocarbons is complete <br /> If you have any questions or comments regarding this report, please call Vernon Elarth at (916) 679- <br /> 2299 <br /> Sincerely, RED <br /> GEp<O <br /> URS Corporation Americas �� �PAUL e <br /> No 7 20 <br /> EXP (0 <br /> Michael Hall Vernon Elarth, R G \Q' <br /> Staff Geologist Project Manager `p�q OF CAL1F�Q� <br /> . Enclosures Table 1 Groundwater Gradient Data <br /> Table 2 Soil Analytical Data <br /> Table 3 Soil Oxygenates Analytical Data <br /> Table 4 Groundwater Elevation and Analytical Data <br /> Table 5 Groundwater Fuel Oxygenates Analytical Data <br /> Figure 1 Site Location Map <br /> Figure 2 Site Plan With Geologic Cross-Section Line <br /> Figure 3 Generalized Geologic Cross-Section A-A' <br /> Attachment A SJCEHD Correspondence <br /> Attachment B SJCEHD Well Permit <br /> Attachment C Soil Boring Logs and Well Construction Details <br /> Attachment D Field and Laboratory Procedures <br /> Attachment E Well Development Field Sheets <br /> Attachment F Groundwater Sampling Field Sheets <br /> Attachment G Well Survey Data <br /> Attachment H Laboratory Analytical Reports and Chain-of-Custody Documentation <br /> Attachment I Soil and Water Disposal Documentation <br /> cc Mr Paul Supple, Atlantic Richfield Company <br /> Mr James Barton, RWQCB-CVR <br /> Project File <br /> K 1WprocessW BP ARC010218612004 Assessment\Report 04 doe <br />