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KLEINFELDER <br /> PROPOSAL <br /> SOIL EXCAVATION OBSERVATION, SOIL SAMPLING AND ANALYSIS <br /> ABOVEGROUND STORAGE TANK <br /> LARKSPUR ESTATES (PARCEL #6) <br /> TRACY, CALIFORNIA <br /> I. INTRODUCTION <br /> Kleinfelder is pleased to present this proposal to DSS Engineering, Inc. of Stockton, California. <br /> This proposal was developed after correspondence with Mr. Randy Bling, and using Kleinfelder's <br /> current understanding of the site conditions and is a preliminary understanding of Mr. Bling's and <br /> DSS 's desires and requirements. We prepared this proposal based on information usually <br /> requested in a workplan by the San Joaquin County Public Health Services Department <br /> Environmental Health Division (PHS/EHD) and the State of California Regional Water Quality <br /> Control Board Central Valley Office (RWQCB). <br /> Kleinfelder is committed to providing a high level of service to its clients, commensurate with their <br /> wants and needs. If a portion of this proposal does not meet the needs of the client, or if those <br /> needs have changed, Kleinfelder stands ready to consider appropriate modifications, subject to the <br /> standards of care to which we adhere as professionals. Modifications such as changes in scope, <br /> methodology, scheduling, and contract terms and conditions may result in changes to the risks <br /> assumed by the client, as well as adiustments to our fees. We look forward to the opportunity to <br /> serve you. <br /> II. BACKGROUND <br /> Kleinfelder understands an aboveground diesel storage tank (AGST) is at the above-referenced <br /> address. A Phase I Environmental Site Assessment was conducted in early September by Michael <br /> E. Gingrass, in which several areas of"stained and odorous" soil were identified in the vicinity of <br /> the above-ground storage tank. A composite soil sample was collected September 9, 1997 by Mr. <br /> Gingrass, from three distinct areas surrounding the tank to a depth of two to three feet below <br /> surface grade. Results of the analysis indicated diesel fuel soil contamination of 57,000 mg/kg <br /> (ppm). However,,the sampling conducted did not define the extent of contamination. Rather the <br /> work conducted confirmed that contamination existed in "stained and odorous" soils. Kleinfelder <br /> was requested by DSS to submit a proposal to collect and analyze soil samples in the location of the <br /> AGST in an attempt to assess the extent of the soil contamination. <br /> On November 5, 1997 a Kleinfelder geologist visited the subject site. The farmhouse and <br /> associated structures were found to be recently removed. However, DSS had provided <br /> Kleinfelder with a large detailed map of the farmhouse showing the location of the AGST. <br /> Distances from an existing septic tank and well were used to locate the former location of the <br /> AGST. Soil staining and a diesel like odor were noted in this area. The soil staining was <br /> 20-YP7-208/2017PI57/2017C344 Page 1 of <br /> 1997 Kleinfelder,Inc. November 6, 1997 <br />