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Mr. Matt Gabris 1144 Page 2 of 2 <br /> Earth Grain/former Kilpatrick Bakery <br /> 1717 S. Center Street, Stockton, California <br /> The revised report should also address the following items discussed by telephone <br /> between the EHD and PSC personnel on April 29, 2010: <br /> 1. An evaluation of the contaminant plume characteristics, i.e. mass, distribution, <br /> etc, and an interpretation of whether or not contaminants encountered in MW-5A <br /> are related to your unauthorized UST system release; <br /> 2. The implications of that interpretation regarding plume extent, mass, and its <br /> associated human health risk and threat to groundwater; <br /> 3. A comparison of pre-remediation and post-remediation (present) contaminant <br /> masses to demonstrate effectiveness of corrective actions to date; <br /> 4. An analysis of contaminant concentration trends, with a prediction of the time <br /> required to achieve water quality objectives (WQOs) as established in the Basin <br /> Plan by the Central Valley Regional Water Quality Control Board (CVRWQCB); <br /> 5. Reevaluate sufficient groundwater elevation data to demonstrate whether or not <br /> MW-4 is a valid down-gradient well; <br /> 6. Compare shallow soil analytical data to San Francisco Bay Regional Water <br /> Quality Control Board (SFBRWQCB), Environmental Screening Levels (ESL); <br /> and <br /> 7. Demonstrate whether or not the deep CPT-3 grab groundwater data is likely to <br /> be related to the unauthorized release from your former UST system. <br /> If you determine that there is not sufficient data to address these issues, please provide <br /> a work plan to the EHD to acquire the needed information by June 15, 2010. <br /> You may contact Michael Infurna at (209) 468-3454 if you have any questions and to <br /> schedule the next ground water monitoring and sampling event. <br /> jt�c e'e� <br /> Michael J. Infurna Jr., REHS Nuel Henderson, PG. <br /> Senior Registered Environmental Health Specialist Engineering Geologist <br /> c: Paul Anderson, PSC, 210 West Sand Bank Rd., Columbia, III. 62236 <br /> Jerry Gregerson, P. O. Box 7385, Stockton, CA 95267 <br /> Ismael & Magdalena Rivera, 1717 S. Center St., Stockton, CA 95206 <br /> CVRWQCB, James Barton <br /> SWRCB-CUF, Mark Owens <br /> 1717 Center CPT report CML 5-7-2010 <br />