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ROUND <br />1172 Kansas Avenue, Suite A <br />ANALYSIS, INC. <br />Modesto, CA 95351 <br />209.522.4119 - PH <br />209.522.4227 - FAX <br />grounclzeroanalysis.corn <br />August 22, 2017 <br />Mr. Michael Kith <br />San Joaquin County Environmental Health Department <br />1868 E. Haze1ton Ave. <br />Stockton, California 95205 <br />Subject: Well Destruction & Waste Removal Work Plan including Permits <br />George's Service, 1680 (Former 1600) W. Durham Ferry Rd. Tracy, CA <br />RB Case #390375 (Geotracker Global ID # T0607700285) <br />Dear Mr. Kith: <br />We are submitting the following work plan on behalf of the Teranishi Trust in order to request the <br />destruction of the existing wells associated with the UST cleanup project conducted at 1680 Durham <br />Ferry Road in Tracy, California (Site). A Central Valley Regional Water Quality Control Board <br />(CVRWQCB) letter requesting the preperation of a well destruction and waste removal work plan <br />has been attached in Attachment A. Prior to the site receiving regulatory agency closure, all waste <br />materials will be removed and all wells will be destroyed in accordance with San Joaquin County <br />and California State Well Standards. The location of the Site is shown on Figure 1 of Attachment B. <br />Ground Zero Analysis, Inc. (Ground Zero) has prepared the work plan below for the destruction <br />of a total of 34 wells including twenty (20) groundwater monitoring wells, eight (8) air sparge <br />wells and six (6) vapor extraction wells. The location of the Site's wells are shown in Figure 2. <br />The wells proposed for destruction are listed in Table 1 of Attachment C. The methods used for <br />well destruction will follow the San Joaquin County Well Standards requirements. Groundwater <br />analytical data for the Zone A, Zone B and Zone C/D groundwater monitoring wells are included <br />in Table 2, Table 3 and Table 4 of Attachment C, respectively. The soil analytical data is included <br />in Table 5. <br />Drill-Out <br />Wells will be destroyed based on the San Joaquin County and California State Well Standards. <br />The drill out method includes drilling out and removing all the contents of the well (conductor <br />casing, well casing, screen, filter pack and grout seal). Upon removing the well contents, the <br />cleared borehole will be sealed with neat cement by installing grout with a tremie pipe from the <br />bottom upward to a depth of approximately three (3) feet below grade. Clean native soil will be <br />used to fill the upper three (3) feet and capped with appropriate material (concrete, asphalt, dirt). <br />Page 1 of 4