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• µ Clayton <br /> EVoX0NMt14TAI <br /> i r„S�tT+tips <br /> 1.0 INTRO UMON <br /> Clayton Environmental Consultants, Inc, was retained by Ot chard Suppl; Hardware <br /> (OSH) to summarize the results of scil and groundwater investigations and <br /> remediation conducted at the northeast corner of MacArthur Dave and Orant Line <br /> Road in Tracy, California (Figure 1). <br /> 1.1 BACKGROUND <br /> Clayton has completed the following work at the site: <br /> a' Renart Title <br /> Work Completed n <br /> w Phase I Environmental Assessment of A visual survey of the property for <br /> Parcel B, dated February 9, 1990 onsite uses, USTs, transformers, <br /> Kr ^ (Clayton Project No. 27537 00) hazardous substances, surrounding <br /> s property uses. Review of available <br /><ft y v <br /> reguIatory agency tiles. <br /> Soil and Groundwater Investigaton for Covers the installation of monitoring <br /> Orchard Supply Hardware, dated April wells MW-1,MW-2, and MW-3 and <br /> 26, 1990{Clayton Project No. sampling and laboratory analysis of soil <br /> m�] ; 28094.00) and groundwater <br /> Sol!Excavation and Aeraiwn for Documents initial excavation (and <br /> Interiand Corporation, dated October subsequent overexcavation), sampling <br /> 19 199D, (Clayton project No and laboratory analysts of soli around <br /> r-3' 29531.00) former fuel pumps,and septic tank, soil <br /> '� y aeration, and backfiWng,of excavation. <br /> Soil and Groundwater Investigation, Documents the installation of well MW- <br /> px daied4Februa 11, 1991 {Cla on 3B; sam lin and laborato anal is of <br />' p Project No. 3 649.00) soil and gro ndwater; and tthhe proper <br /> abandonment otwells MW-3 and the <br /> � k domestic water well. <br /> ` Additional Sod and Groundwater Documents the`sa iitipling and laboratory <br /> • <br /> Investigation, dated May 21, 1991 analysis of soil,arouii4inomtormg well <br /> (Clayton Pr63ect No. 34500.00) MW-3B,'quarterly groundwater sampling <br /> and analysis, and abandonment of septic <br /> Tank #2. <br /> fj <br /> Sections 2 D through 6.0 describe the completion of each of the projects listed above. <br /> Expept,where noted in the text, all work was performed in accordance with Clayton's <br /> Drdltng, ,Weff Construction, and Sampling Protocols for BoreholelMonitortrig Well <br /> Installation, included as Appendix A. <br /> t , 1.2 PURPOSE <br /> v, �f <br /> In her letter to Ms Beth Thayer of the Central Valley Regional Water Quality <br /> r Control Board (RWQCB), dated July 16, 1991, Ms. Laurie Cotulla, Program Manager <br /> of the San Joaquin County Public Health Services, Environmental Health Division <br /> t� <br /> ni ri i <br /> t 4nn, <br /> h <br />