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ENVIRONMENTAL HEALTH DEPARTMENT <br /> SAN JOAQUIN COUNTY <br /> r. '? Donna K.Heran,R.E.H.S. Unit Supervisors <br /> Director <br /> 304 East Weber Avenue, Third Floor Carl Borgman,R.E.H.S. <br /> At Olsen,R.E.H.S. Stockton, California 95202-2708 Mike Huggins,R.E.H.S.,R.D.I. <br /> Program Manager Douglas W.Wilson,R.E.H.S. <br /> C'9�:cOPa`P g g Telephone: (209)468-3420 Margaret Lagorio,R.E.H.S. <br /> Laurie ogA.Co Manulla,R.E.H.S. Fax: (209) 464-0138 Robert McClellon,R.E.H.S. <br /> Program Manager Mark Barcellos,R.E.H.S. <br /> 521 M.CHECIA <br /> ROKEE <br /> ,/^/N f� F 521 N. A 95240 LANEV <br /> LODI CA 95240 <br /> R8: 521 N. Cherokee Lane Site Code: 1324 <br /> WORK PLAN: Expanded Work Plan to Complete Soil and Ground Water Investigation <br /> DATED: April 20, 2003 <br /> PREPARED BY: Stephen G. Muir <br /> APPROVED: [XI <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORK PLAN [H&S 25299.37 (c) (3)) : <br /> 1. To complete 7 monitoring wells (MWs) and 3 soil borings to determine <br /> the lateral extent of soil and ground water contamination. <br /> 2. To collect soil samples every 5 feet from all borings. To select <br /> appropriate samples for analyses: TPH-gas, BTEX, fuel oxygenates <br /> (including 1,2-DCA) and lead. <br /> 3. To develop all MWs prior to groundwater sampling. <br /> 4. To collect groundwater samples, on a Quarterly basis, for analyses of <br /> the above gasoline constituents. Quarterly reporting is also <br /> required until site closure is granted. <br /> 5. To conduct a well receptor survey within a 2000 foot radius of the <br /> site. <br /> 6. To develop a Site Conceptual Model using site specific information. <br /> 7. To prepare a Preliminary Problem Assessment Report and submit it to <br /> EHD and CVRWQCB for review and comment. <br /> 8. To develop a Work Plan (WP) for feasibility testing. <br /> 9. To enter the site information into SWRCB Geo Tracker data base using <br /> EDF. <br /> COMMENTS AND CONDITIONS: <br /> 1. The total depth of 60 feet bgs proposed for MWs construction is <br /> approved, but the well screens should be limited to no more than 20 <br /> feet. <br /> 2. A WP to vertically define the extent of soil and ground water <br /> contamination will be required and one continuous core soil boring, <br /> at a minimum, will be required in the source area. <br /> 3. All necessary access agreements and permits must be procured prior to <br /> beginning work. An EHD well permit application and fees must be <br /> submitted to EHD for review and permit issuance. When an approved <br /> permit is issued, drilling inspections can be scheduled with EHD. <br /> DATE b/� -7�U3 BY 4 ✓6"" k^^- <br /> Harlin Knoll REHS(209)468-3442 <br /> C '0 ,557 <br />