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ENVIRONMENTAL HEALTH DEPARTMENT <br /> "�U`" SAN JOAQUIN COUNTY <br /> 2.: ,_,sem y Unit Supervisors <br /> Direectorctor ' <br /> Q, 2� Donna K.HR.E.H.S. 304 East Weber Avenue Third Floor Carl Borgman,R.E.H.S. <br /> r <br /> �,. <br /> At Olsen,R.E.H.S. Stockton, California 95202-2708 Mike Huggins,R.E.H.S.,R.D.I. <br /> Douglas W.Wilson,R.E.H.S. <br /> • c .. .N�c • Program Manager Telephone: (209) 468-3420 Margaret Lagorio,R.E.H.S. <br /> 9c i t o a Laurie A.Cotulla,R.E.H.S. <br /> Program Manager Fax: (209) 464-0138 Robert McClellan,R.E.H.S. <br /> Mark Barcellos,R.E.H.S. <br /> JOSE M. GARCIA <br /> 521 N. CHEROKEE LANE <br /> LODI CA 95240 <br /> RE: 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: [X) <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORK PLAN [H&S 25299.37 (c) (3)1 : <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 /> S. 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 (f,I -J/ U3 BY <br /> ((( Harlin Knoll REHS(209)468-3442 <br />