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KLEIN FELDER R1;VISED PROPOSAL/WORKPLAN LIMITED PRELIMINARY SITE ASSESSMENT DELTA SIGN & CRANE SERVICE 21.00 SANGUINETTI LANE STOCKTON, CALIFORNIA INTRODUCTION Kleinfeider is pleased to present this revised proposal to Delta Sign & Crane Service. This revised proposal ,,vas developed after correspondence with Ms. Penny Patti of Delta Sign & Crane Service, using Kleinfelder's current understanding of the site conditions and is a preliminary understanding of Delta Sign & Crane Services' desires and requirements. This proposal was revised based oil the comments o:l- M.s. Carol Oz ol'the San Joaquin County Public Health Services Department, Lnvironment:al Division (PHS/EH.D). We prepared this proposal based oil information usually requested in a workplan by the San .loaquin County Public Health Services Department, Environmental Health Division (P -1S/EHD) and the State of California Regional Water Quality Control Board (IZWQCB). Kleinfelder is committed to providing a high level of service to its clients, commensurate with their wants and needs. If a portion of this proposal does not meet the Deeds of the client, or if those needs have changed, ICleinfclder stands ready to consider appropriate modifications, subject to the standards of care to which Svc adhere as prol:cssionals. Modifications such as changes in scope, methodology. scheduling, and contract terms and conditions may result in changes to the risks assumed by the client, as Nvell as adjustments to our fees. We look forward to the opportunity to scrve you. BACKGROUND KIeinfelder was asked to submit a Revised Proposal/Workplan for a preliminary site assessment of soils in the vicinity of a former UST at the subject site. It is Kleinfelder's understanding that this Revised Proposal/Workplan is for the first investigation required after tank removal (Preliminary Site Assessment per State of California Leaking Underground Storage Tani: Clean- up Fund). The site has report:edly.received.a "Letter of Commitment" f:or Category .13 :funding, however, :funds are currently not available. PNS/EH.D has requested a workplan to define the lateral and vertical extent of contaminants. This Revised Proposal/Workplan (less the attached cost estimate and contract) may be submitted 'Par that purpose. Kleinfelder understands a single. UST was removed on August 1, 1997, and that gas and diesel contaminated soils were noted. 'three soil samples were submitted for analyses, two appear to be collected from vothin the excavation at depths of' 10 and 11 feet, and one from soil stockpiled from the excavation. "total Petroleum hydrocarbons as Diesel (lTPH-D) and the gasoline 20-Y118-12,1/20181'I it I Pagc 1 or 7 ©1998.Klcinl'cider, Inc. JU11C 10, 1998 ,3