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ENVIRONMENTAL HEALTH DEPARTMENT SAN JOAQUIN COUNTY ,o._� .coG Unit Supervisors 2r '—"" ? Donna K.Heran,R.E.H.S. 304 East Weber Avenue, Third Floor Carl Borgman,R.E.H.S. a: .. Director Mike Huggins,R.E.H.S.,R.D.I. "' ' `` Al Olsen,R.E.H.S. Stockton, California 95202-2708 Douglas W.Wilson,R.E.II.S. • c•.. ~P • Program ManagerTelephone: (209) 468-3420 Margaret Lagorio,R.E.H.S. �iFOR Laurie A.Cotulla,R.E.H.S. Robert McClellon,R.E.H.S. Program Manager Fax: (209) 464-0138 Mark Barcellos,R.E.H.S. GIRISH PATEL MAY 2 5 2004 5708 N HWY 99 FRONTAGE RD STOCKTON CA 95212 RE: St. Francis Motel (UIC septic) CO#:000020675 5708 N. Hwy 99 Frontage Rd Stockton, CA. 95212 On April 18, 2004, San Joaquin County Environmental Health Department (EHD) posted the above referenced facility as "unsafe to occupy" due to the operations of an illegal drug lab. On May 5, 2004 samples of the contents of the septic tanks were obtained and analyzed. The analytical results showed that disposal of chemicals (toluene, 1,4- Dichlorobenzene, 2-butanone,,2-propanone [acetone], and p-isopropyltyouene) into the septic system had occurred. San Joaquin Couhty Ordinance Code Section 9-1110.7 prohibits disposal of solvents and toxics in a septic system. EHD has implemented a Local Agency Groundwater Protection/Underground Injection Control (UIC) Program in accordance with guidelines prepared by the United States Environmental Protection Agency (USEPA). The primary focus of the program is to protect drinking water by identification and evaluation of subsurface disposal of prohibited substances. The presence of the above noted chemicals in your septic tank makes it subject to the underground injection control regulations and our local program. The above referenced property has been placed on the EHD list of UIC sites and will remain an open case until the proper investigation has been conducted. Activities involving site assessment require a professional level of expertise. Work and reports related to closure of this case must be signed by a California registered geologist (R.G.) or professional engineer (P.E.). Typically, EHD requires further investigation to determine whether the chemicals found in the septic tanks flowed into the soil from the leach lines and/or seepage pits of the septic system. This will help EHD evaluate if there is a threat to drinking water. If chemicals have been released to the subsurface from the leach lines and/or seepage pits, continued use of the septic system may cause further percolation of the chemicals, thereby increasing the threat of chemical contamination of the groundwater. Further site investigation would normally require collection of soil samples from beneath the tanks and leach lines. The soil samples would be analyzed by a certified laboratory for Volatile Organics using EPA Method 8260, Total Petroleum Hydrocarbons (TPH) as gasoline using EPA Methods 5030/8015 and TPH as diesel using EPA Methods 3510/8015.