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PUBLIC HI!ALTH SERVICIS P�� N <br /> SAN JOAQUIN COUNTY r c <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> 9CIFpRN\ <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 <br /> 209/468-3420 <br /> PETE MARTIN <br /> SAN JOAQUIN COUNTY <br /> DEPT OF PUBLIC WORKS JAN 2 81999 <br /> PO BOX 1810 <br /> STOCKTON CA 95201 <br /> Re: Intersection of Thornton Road and Walnut Grove Road <br /> Thornton Ca 95686 <br /> San Joaquin County Public Health Services, Environmental Healt Division (PHS/EHD) <br /> has reviewed the "Soil Sampling Report, Utility Test Trenches" da ed December 22, <br /> 1997 and prepared by ATC Associates. PHS/EHD has prepared t le following <br /> comments for your consideration. <br /> Soil sample analytical results from two separate trench locations ere below detection <br /> limits for the compounds tested. Based on these results, PHS/EH D agrees the project <br /> should continue in accordance with San Joaquin County Department of Public Works <br /> "Soil Contamination Containment Action Plan" (SCCAP) established on Dec. 26, 1997. <br /> In the future if soil encountered is suspected to be contaminated, HS/EHD <br /> recommends the following analysis and methodology be utilized for any soil or <br /> groundwater samples collected: total petroleum hydrocarbons (TRH) as gasoline using <br /> EPA Method 8015 Modified; TPH as diesel or motor oil using Mett od 8015M (with silica- <br /> gel cleanup preparation to remove naturally occurring organic corr pounds); benzene, <br /> toluene, ethylbenzene, and xylene (BTEX) and MTBE using EPA I Aethod 8020; <br /> chlorinated solvents using EPA Method 8010; and total lead usin EPA Method 7420. <br /> If you have any further questions regarding this matter, contact H din Knoll at (209) <br /> 468-3442. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> S �J a U <br /> Harlin Knoll, Senior REHS Marga et Lagorio, REHS <br /> LOP/Site Mitigation Unit IV Supervisor <br /> HK:Ib <br /> A Division of San Joaquin County Health Care Services <br />