SITE INFORMATION AND CORRESPONDENCE_FILE 2

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GROUND ZERO ANALYSIS,INC. 1714 Main Street Escalon,California 95320-1927 Telephone:(209)838-9888 Facsimile:(209)838-9883 'RIM CEU E0 October 9,2008 OCT 1 4 2008 Mr. Mike Infurna ENVIRONMENT HEALTH San Joaquin County Environmental Health Department PERMIT/SERVICES 600 East Main Street Stockton,CA 95202 Subject: Soil Boring Permit Application Harry's Auto, 2662 N. Wilson Way, Stockton, California Dear Mr. Infurna: ��SS Enclosed herewith is a completed drilling permit application and associated fee for the advancement of two(2) soil borings at the subject site(Figure 1). The work will be conducted in accordance with the September 5, 2008 Workplan for Soil Vapor Extraction/Air Sparging Pilot Test and Additional Groundwater Investigation, which was approved by the San Joaquin County Environmental Health Department (EHD) in correspondence dated September 16, 2008 with conditions, which were addressed in the Addendum to the Workplan for Soil Vapor Extraction/Air Sparging Pilot Test and Additional Groundwater Investigation dated September 5, 2008 dated September 24,2008. The proposed soil borings will be advanced to an approximate depth of 60 feet below the ground surface (bgs). A groundwater sample will be collected from each boring using a hydropunch sampling tool in order to investigate the lateral extent of groundwater contamination beneath the site. Boring HP 1 will be advanced on the south side of Robindale Avenue approximately 110 feet west of North Wilson Way and boring HP2 will be advanced on the east side of Sanguinetti Lane approximately 15 feet south of Robindale Avenue. Because the proposed borings are located within San Joaquin County right of way an Encroachment Permit has been obtained from the San Joaquin County Department of Public Works. The proposed off-site activities will be conducted under Encroachment Permit #PS-0803168, a copy of which has been included in Attachment A. The borings will be advanced by Gregg Drilling&Testing, Inc(C57-485165)under the supervision of a Ground Zero geologist. The location of proposed borings can be seen on the site plan provided as Figure 2. Upon completion the borings will be backfilled with neat cement grout, emplaced through a tremie pipe system, and the surface will be completed with an asphalt patch to match the surrounding street surface. No waste will be generated during the proposed drilling activities.