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k' ■ KL EI NEELDER ti PROPOSAL Task 1 -- Permit Submittal and Pre-Mobilization Preparation The San Joaquin County Public Health Services Department Environmental Health Division (PHS/EHD) requires approval of a proposal, application for a boring permit, and payment of fees prior to conducting assessment activities It is assumed that this proposal will suffice to obtain approval from the PHS/EHD Kleinfelder will prepare boring (Geoprobe) permit applications for submittal to PHS/EHD The permits and proposal must be approved prior to conducting any drilling or sampling Additionally, PHS/EHD will bill The Learner Company directly for any oversight fees incurred above the initial 3 hour minimum and permit fee to be submitted by Kleinfelder Kleinfelder will forward the appropriate "billing and compliance acknowledgement forms" to The Learner Company for signature Signed originals of these forms must be returned to Kleinfelder, which will subsequently submit them to PHS/EHD as part of the permit process Our proposed schedule assumes that The Learner Company will expedite the completion of these forms and their return to Kleinfelder for submittal to PHS/EHD Kleinfelder's subcontractor will also contact Underground Service Alert 48 hours prior to conducting field work to notify local utilities of our proposed subsurface assessment • Task 2 -- Soil and Groundwater Sample Collection Kleinfelder proposes to collect soil and groundwater samples on site Kleinfelder proposes collecting soil and groundwater samples from a minimum of eleven Geoprobe borings The borings will be advanced at the locations shown on the attached map The actual sampling locations will be dependent on access, surface conditions, and potential interference with subsurface utilities Because of the nature of the Geoprobe technique, the possibility exists that probe refusal may occur Samples may not be collected if hardpan soil, gravel, or bedrock is encountered The Geoprobes will be advanced to an approximate total depth of 15 feet below surface grade (bsg) The Geoprobes will be advanced using a pneumatically driven steel probe Soil samples will be obtained by inserting a sample barrel, lined with acetate liners, into the probe The sample barrel will be lowered to the desired sampling depth and driven into the soil The sample tubes will be removed and sealed with Teflon and plastic caps During the advancement of the Geoprobes, soil samples will be collected at five (5) foot intervals for lithologic classification and qualitative field screening, with an organic vapor analyzer (OVA) The OVA measures ionizable compounds in air in parts per million by volume (ppmv) Lithologic classification will be based on the Unified Soil Classification System (USCS) Soil samples will be obtained in the vadose zone, based on field observations, for potential quantitative chemical analysis • 20-YPO-307/2000P358/20000508 Page A-2 CoPynght 2000, Kleinfelder Inc October 6,20000