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PUBLIC H ALTH SERVIas <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION T ` <br /> Karen Furst, M.D., M.P.H., Health Officer . P <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 <br /> 209/468-3420 <br /> ARTHUR L WYATT JR. <br /> 6265 CROOKED STICK <br /> STOCKTON CA 9219 <br /> RE: FORMER ARCO AMIPM SITE CODE: 1216 <br /> 4511 PACIFIC AVENUE <br /> STOCKTON CA <br /> WORKPLAN: Former ARCO AWPM- Workplan <br /> DATED: October 26 2000 <br /> PREPARED BY: Advance GeoEnvironmental Inc. <br /> APP OVED X- with Conditions and Recommendations <br /> ADDENDUM <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORKPLAN(H&S 25299.37,subd.(c)(3)): <br /> Monitor and extraction well installations,soil and water sample collection and analyses,interim <br /> remediation as groundwater pump and treat,report of findings. <br /> CONLIY ENTS AND CONDITIONS: <br /> Work must be completed withiri 45 days of approval date below. <br /> Submit Report of Findings by January 30,2000. <br /> Well constructions and interim remediation design must be based on site specific hydrogeologic <br /> features. A final remediation plan must be submitted no later than 180 days from the approval date <br /> um test must be performed to estimate hydraulic conductivity(K),transmissivity(T), <br /> below. A full p P Additional <br /> P <br /> stomtivity (S) and ultimately ground water velocity to predict plume capture or escape. Ad <br /> monitor wells or piezometers must be proposed and installed prior to any pump tests. A report shall <br /> be issued to PHS/EHD and the Central Valley Regional Water Quality Control Board (CVRWQCB) <br /> no later than RO days from startup regarding the effectiveness of the interim remediation system once <br /> installed, recommendations and conclusions shall be made by an appropriately registered <br /> professional. <br /> RECOMMENDATIONS: <br /> The responsible party may install a piezometer in each extraction well borehole for the purpose of evaluating <br /> the live effectiveness(draw down or groundwater concentration)of the interim remediation system <br /> REASONS FOR DISAPPROVAL OF THE WORKPLAN W 25299.37,subd.(c)(3)): <br /> None <br /> DATED 11-1-2000 BY 1 <br /> Ronald W.Rowe Senior RENS 209 468-0342 <br /> t Cc: AGE—Bill Little <br /> CVRWQCB—Marty Hartzell <br /> A Division of San Joaquin County Health Care Services <br />