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• TPH - gasoline, Method 50301LUFT: Detection limit 2.5 mg/Kg. 0 Benzene, Toluene, Ethyl Benzene and Total Xylenes: EPA Method 8020: Detection limit 5.0 µg/Kg. ' Alternatively, a California State certified mobile laboratory will be mobilized to the site and the samples analyzed on site. 3.8 Preparation of Soil Excavation Report At the conclusion of the collection of all pertinent field data and laboratory analyses a report will ' be prepared. The report will be prepared under the direction of, and signed and sealed by a California Registered Geologist, pursuant to the State of California Business and Professional Code (Sections 6735, 7835, and 7835.1). This report will meet the reporting requirements of the Central Valley Regional Water Quality Control Board. ' The report will contain appendices of all data and analyses, field notes, observations, tables, photos, drawings, cross-sections, boring logs, figures, charts or graphs, and other graphical representations produced during the investigation that are necessary to clarify conclusions. The ' findings with regard to the existing conditions on the site will be discussed. The report will include a summary of the investigation activities and results, a tabulation of all soil and ground water data, laboratory data sheets, and recommendations for future work as required. r 4.0 TIME SCHEDULE Western Refrigerating and Cold Storage and American Geological request that approval be granted to initiate the remedial excavation in April, 1998. Quarterly ground water monitoring would be continued, as previously modified, until that time. . tAfter the collection of ground water samples for the March, 1997 quarterly sampling event, AGS will schedule the destruction of the four ground water monitoring wells. Excavation activities ' will commence shortly thereafter. It is anticipated that excavation and backfilling operations will take approximately two weeks. 1 Remediation of the contaminated soil will begin as soon as practical after excavation. The time required to remediate the soils to target levels is dependent on many factors beyond the control of AGS. Weather conditions, the volume of contaminated soil, aeration pad area, and permit limits ' will influence the rate of remediation. AGS anticipates that all excavated soils will be successfully remediated by September, 1998. ' AGS will make every effort to complete all tasks on schedule and will make appropriate notification of significant changes to the work schedule. American Geological Services, Inc. CA95DE-029 ' 8