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I"DBmsca <br /> Associates, Inc. <br /> Environmental Engineering Geology <br /> August 8, 2013 <br /> Columbia River Corporation <br /> c/o Beall Corporation <br /> Attention: James Beall <br /> P.O. Box 17095 <br /> Portland, OR 97217 <br /> WORKPLAN <br /> PHASE II ENVIRONMENTAL SITE ASSESSMENT <br /> MOFFAT BOULEVARD PROPERTY <br /> APN 228-050-05 <br /> 1813 Moffat Boulevard <br /> Manteca, California <br /> INTRODUCTION <br /> We have prepared this Workplan for Phase II Environmental Site Assessment at the subject <br /> property. The purpose of the proposed investigation would be to evaluate environmental <br /> concerns presented in a recent Phase I Environmental Site Assessment of the property by our <br /> firm.' Specifically, the Phase II investigation would include subsurface soil sampling and <br /> laboratory analyses to evaluate whether past use of a waste water sump and/or an on-site septic <br /> disposal system resulted in significant discharges of hazardous substances to the subsurface. Our <br /> proposed scope of work includes the advancement of five borings for the collection of soil <br /> samples for laboratory analysis. A Vicinity Map showing the location of the property is <br /> presented as Plate 1. A Plot Plan showing the proposed boring locations is presented as Plate 2. <br /> Additionally, a Site Safety Plan is attached. This Workplan will be submitted to the San Joaquin <br /> County Environmental Health Department as a part of the required documentation for approval <br /> of the boring permit related to the work. <br /> 1 Brusca Associates, Inc.; "Phase I Environmental Site Assessment, Moffat Boulevard Property, 1813 Moffat <br /> Boulevard,Manteca,CA;July 15,2013;Brusca File No. 114-001. <br /> BruscaAssociates.com * P.O. Box 332, Roseville, CA 95661 • phone (916) 677-1470 <br />