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205 N. Center Street Stockton #4493 <br /> ARCO plans to continue monitoring the contaminant plume from this site. The EHD previously <br /> recommended batch extraction of groundwater in the area.of IvIW8 and Iv V112 to reduce mass and <br /> speed up the possibility of closure. ARCO was concerned it would move more solvent constituents <br /> to the site that are not considered to be from the ARCO site. This remediation will be further <br /> discussed by ARCO and SECOR. <br /> 16 E. Harding Way,Stockton, #4932 <br /> The EHD will approve the proposed work plan. ARCO will work with ConocoPhilhps on <br /> installation of a remediation system for the MTBE that has migrated onto their site at 1502 N. El <br /> Dorado. <br /> 1617 W. Fremont Street, Stockton, #5450 <br /> The plan for destruction of the monitoring wells has been approved by EHD and the work is to be <br /> scheduled. <br /> 130 S. Wilson Way, Stockton,#5469 <br /> The Site Conceptual Model has been submitted and concludes that the contaminant plumes from <br /> 101 S.Wilson Way and 102 S. Wilson Way are commingled with the contaminant plume from this <br /> site. The EHD is in agreement with this conclusion and encourages ARCO to contact the other <br /> responsible parties about entering into a commingled plume agreement and applying to the State <br /> Water Resources Control Board Cleanup Fund for reimbursement of corrective action costs. There <br /> are three monitoring wells proposed for installation off-site. The property owner verbally agreed but <br /> has not signed the access agreement. ARCO will follow-up on obtaining the access agreement. <br /> ARCO.will consider upgrading the currently operating ozone system to a system that injects a greater <br /> amount of ozone per hour. <br /> 85 Louise Avenue,Lathrop, 6080 <br /> A work plan for destruction of the monitoring wells is to be submitted to EHD. <br /> 25775 S. Patterson Pass,Tracy, #6100 <br /> SECOR prepared an Assessment Report for the site and did not feel they could estimate the mass of <br /> contamination at the site. EHD agree that it would be difficult given the complexity of the site. <br /> SECOR will measure vapor coming out of individual wells and propose destruction of any wells that <br /> do not have any vapor concentrations and are not necessary for remediation. The EHD will discuss <br /> this site with the Central Valley Regional Water Quality Control Board (CVRWQCB). If the <br /> CVRWQCB concurs that the site is defined, the EHD will require submittal of a Final Corrective <br /> Action Plan and conduct public participation. <br /> If you have any questions or comments please contact the appropriate LOP staff overseeing the site <br /> or call me at (209) 468-3449. <br /> Donna Heran,RENS,Director <br /> Environmental Health Department <br /> Margaret Lagorio,RENS <br /> Program Coordinator Unit IV <br /> C' CVRWQCB—James L. L. Barton,RG <br /> SECOR—Rusty Benkosky, Brian Westhoff <br />