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Clayton <br /> EWROI�.uEVAL <br /> CON 5L.!tAn'r5 <br /> 1.0 INTRODUCTION <br /> Clayton Environmental Consultants, Inc., was retained by Orchard Supply Hardware <br /> (OSH) to summarize the results of soil and groundwater investigations and <br /> remediation conducted at the northeast corner of MacArthur Drive and Grant Line <br /> Road in Tracy, California (Figure 1). <br /> 1.1 BACKGROUND <br /> Clayton has completed the following work at the site: <br /> Rg rt Title Work C©m Ip eted <br /> _ Phase I Environmental Assessment of A visual survey of the property for <br /> Parcel B, dated February 9, 1990 onsite uses, USTs, transformers, <br /> (Clayton Project No. 27537.00) hazardous substances,surrounding <br /> property uses. Review of available <br /> _ r regulatory agency files. <br /> • Soil and Groundwater Investigation for Covers the installation of monitoring <br /> t Orchard Supply Hardware, dated April wells MW-1, MW-2, and MW-3 and <br /> 26, 19901_C"layton Project No, sampling and laboratory analysis of soil <br /> ! .-. 28094.00 <br /> t ( ) and groundwater. <br /> j • Soil Excavation and Aerationfor Documents initial excavation and <br /> Interland Corporation, dated.October subsequent overexcavation), sampling <br /> 19, 1990, (Clayton Project No. and laboratory analysis of soil around <br /> E 29531.00) former fuel pumps and septic tank, soil <br /> aeration, and backfilling of excavation. <br /> Soil and Groundwater Investigation, Documents the installation of well MMI- <br /> dated February 11, 1991 (CIayton 3B,,sampling, and laboratory analysis of <br /> i Project.No. 32649.00) soiland groundwater; and the proper <br /> f abandonment of wells MW-3 and the <br /> L domestic water well. <br /> Additional Soil and Groundwater Documents the sampling and laboratory <br /> { Investigation, dated May 21, 1991 analysis of soil around monitoring well <br /> (Clayton Project No. 34500.00) MW-3B; quarterly groundwater sampling <br /> and analysis, and abandoF went of septic <br /> ' Tank #2. <br /> } ections 2.0 throu... 6.0- describe the completion of each of the'projects listed above. <br /> 1 Except where noted in the text, all work was performed in accordance.with Clayton's <br /> r Drilling Well Construction, and Sampling Protocols for BoreholelMonitoring Well <br /> . t Installation, included as Appendix A. <br /> 1.2 PURPOSE <br /> I _ <br /> .`' In her letter to Ms. Beth Thayer of the Central Valle Regional Water Quality <br /> Control Board (RWQCB), dated July 16, 1991, Ms. Lauri Cotulla, Program Manager <br /> of the San Joaquin County Public Health Services, Environmental Health Division <br /> 1 <br /> - 3450Mu" <br /> ?i <br />