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PUBLIC**-HEALTH SERVICESuliv.. <br /> SAN JOAQUIN COUNTY <br /> K: •'t <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Ernest M. Fujimoto, M.D., M.P.H., Acting Health Officer <br /> 445 N. San Joaquin Street • P.O. Box 388 Stockton, CA 95201-0388 4�iFoae� <br /> (209) 468-3420 <br /> DOUG WESTERHAVEN <br /> AMERICAN FOREST PRODUCTS <br /> 4000 KRUSE WAY PL BLDG 2 STE 12.0 <br /> LAKE OSWEGO OR 97035 �� 1 <br /> RE: American Moulding and Millwork SITE CODE: 1882 <br /> 2801 West Lane <br /> Stockton CA 95208 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) has <br /> reviewed the November 1994 Technical Evaluation; and the Workplan for Additional Soil <br /> Sampling and Monitoring Well prepared by Dames and Moore for the above referenced site. <br /> The Technical Evaluation describes various attributes of remediation options available for this <br /> site. Section 4.2 of The Technical Evaluation refers to computer modeling of the site presented <br /> in the August 1994 Draft Amended Closure Request. This model which uses 54 feet to <br /> groundwater as an input parameter concludes there is no threat to groundwater at this site. Using <br /> this data a no action or a limited action option would be acceptable. In that same Draft Amended <br /> Closure Request a computer model using 35 feet to groundwater concludes that there is a threat <br /> to groundwater at this site. Groundwater at this site was measured at 35 feet in July 1987. <br /> PHS/EHD policy is to consider the highest recorded groundwater at a site during a 10 year <br /> period as the seasonal high groundwater elevation for purposes of applying the corrective action <br /> regulations of Title 23 in the California Code of Regulations. <br /> PHS/EHD has determined that the maximum allowable level of Total Petroleum Hydrocarbons <br /> as Diesel (TPH-d) that can be left in soil at this site using a depth to groundwater of 35 feet as <br /> 100 parts per million. The last measured analytical confirmation sampling from the bottom of <br /> the previously overexcavated areas is 4200 ppm of Diesel at 22 feet in the west excavation and <br /> 740 ppm at 26 feet of Diesel in the east excavation. <br /> The Technical Evaluation lists seven options for remediation of contaminated soil present <br /> beneath the site. Options 1, 2, and 3 are the no action or limited action alternatives and are not <br /> acceptable. Options 4,5,6 and 7 may reduce the levels of contamination enough to meet the <br /> closure requirements of Appendix B. <br /> A Division of San.Ioaquin County Health Care Servicer <br />