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KLEINFELDER <br /> SCOPE OF SERVICES <br /> Task 1: Work Plan and Permit Preparation <br /> A boring permit is required from San Joaquin Environmental Health Division prior to <br /> drilling a soil boring in the county. The SJEHD has requested a site investigation work <br /> plan be submitted and reviewed before a boring permit will be issued The work plan <br /> presents the proposed scope of work including- <br /> 0 Boring locations <br /> o Method of drilling <br /> o Soil sampling procedures <br /> o Decontamination procedures <br /> o Chemical analysis <br /> o Report preparation <br /> A work plan presents a specific scope of work so that there is a clear understanding of the <br /> required investigative procedures between the client and the regulatory agencies <br /> Kleinfelder has prepared this proposal to be adequate as a work plan for agency approval <br /> If additional information is required by the SJEHD, additional costs will be incurred <br /> Task 2: Drilling and Sampling of Borings <br /> A total of six borings will be drilled at the locations shown on Plates 1 and 2 As buildings <br /> • are reported to be along side the three tanks, a boring will be located approximately 3 feet <br /> from each end of tank T1 and two borings will be advanced near the pump island at T1 <br /> Two angle borings will be drilled at the east ends of T2 and T3 <br /> At site #1, the end borings at T1 will be drilled vertically to first encountered ground water <br /> or a maximum depth of 25 feet Additionally, two shallow (3 to 5 feet deep)samples will <br /> be collected from borings adjacent to the pump island At Tl, if no field observable <br /> evidence of contamination is encountered in the proposed borings, San Joaquin may like to <br /> authorize additional shallow borings in the vicinity of the fuel piping to assist with the <br /> assessment of the tank system failure As additional costs for drilling and sample analysis <br /> may be incurred, San Joaquin County will be advised of the current state of the assessment <br /> and verbal authorization will be requested prior to drilling the additional borings <br /> At site #2, because of obstructions (utilities and buildings), one angle boring is proposed <br /> per tank (T2 and T3). The borings will be angled such that one soil sample can be <br /> collected at a depth of approximately 10 feet at the east end of the tank (four feet beneath <br /> the bottom of the tanks), and a second sample can be collected at a depth of 15 to 20 feet <br /> (9 to 14 feet beneath the bottom of the tanks) <br /> Soil borings will be advanced using a truck-mounted drill rig equipped with 6-inch hollow <br /> stem augers The borings will be drilled, togged, and sampled following the protocol <br /> described in Attachment A, Sections A-21 through A-2.4, and closed as described in <br /> Section A-2 7. <br /> • <br /> FR25-91-23 Page 2 of 3 <br /> Copyright 1991 Klemfelder,Inc <br />