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i • <br /> cZI L � s,a <br /> • Underground Storage Tank Removal Verification <br /> This issue was addressed in letters fiom Mi Tom Maher dated Septembei 9, 1996 and <br /> Octobei 22, 1996, and is therefoic not addressed in this work plan <br /> Technical Rationale for Proposed Scope of Work <br /> i Soil sampling data indicate that petroleum hydrocarbons are present in vicinity of <br /> the foimer undeigiound storage tanks <br /> 0 Data from the adjacent BP site investigation indicate that ground water flow <br /> direction is to the northeast <br /> • Boiings aie proposed to delineate the extent of petroleum hydioc ubons in soil and <br /> ground water <br /> • Data will be collected on the physical properties of the soils at this Site These data <br /> may be used at a later date as part of a Risk Based Corrective Action evaluation <br /> Work Tasks <br /> Tek 1 PQrmis and.Ri ht-of-Entry <br /> • Appropriate permits for drilling will be obtained from SJCPHS Agieements foi light-of- <br /> entry will be obtained from Bank of the West, the current owner of the property <br /> Task 2 Health and Safety Plan <br /> A site-specific Health and Safety Plan will be prepaied for field work <br /> Task 3 Utjhly Clearance <br /> Pioposed diilhng locations will be marked and their locations cleared through Underground <br /> Services Alert (USA) prior to dulling <br /> Task 4 Site Inve ti ati n <br /> Five exploratory borings are proposed as shown on Plate 2 These borings will be drilled <br /> using Geoprobe dnllmg techniques These borings will be drilled to first encountered <br /> ground water which is estimated to be located at a depth of approximately 31 feet below <br /> grade (fbg) based on GCI's work <br /> An Enviros geologist will supervise the dnlling and describe encountered soils using the <br /> Unified Soil Classification System (USCS) Soil samples will be collected at five foot <br /> intervals and/or significant lithologic changes for lithologic description Soil sample <br /> intervals will be screened in the field foi orgwuc vapor by measuring head-space vapors <br /> using an organic vapor meter (OVM) <br /> i <br /> 96406 2 <br />