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DEPARTMENT <br /> NTAL HEALTH <br /> FXVIRONME <br /> [JUIN COUNTY Unit Super,visors <br /> N �QA�.[ Carl Borgman,R.E•H-S- <br /> a" SA Third Floor R.D.I. <br /> P' • --'--C venue, Mike Huggins,4t.E-K�S., <br /> 304 East Weber A Wilson,R.E.H.S. <br /> Donna K.RQran,R.E.H S Douglas W. <br /> Director Stockton, California 95202-2708 MargaretLagorio,RTA-S• <br /> Al Olsen, S 3420 <br /> R.F.H Telephone: (209) 468- Robert McClellon,R•l -H S <br /> ._. .P• <br /> pt-ogram Man ager 464-0138 <br /> . � ••- Fax-, (209) Mark Sarcellos,R.E.H.S. <br /> Laurie A.Cotulia,R.E.H•S• <br /> Program Manager <br /> BARSOOM INC / ALEXANDER ENSHER MAY 0 4 20g4 <br /> 926 J BLDG RM 503 <br /> SACRAMENTO CA 95814 <br /> RE: UIC-Septic System Site Code: pending <br /> CO#: 0020432 <br /> 14200 W. Bacon Island Rd RO#: pending <br /> Stockton, CA. 95219 <br /> San Joaquin County Environmental Health Department (EHD) has reviewed the April 2, <br /> Environmental <br /> septic tank contents s and thelApriilfor petroleum l 23, 2004, Metter from Michaelocarbons rom Cal Tech <br /> S Blankinship, <br /> Environmental Labora a P <br /> P.E. stating his thoughts on the data. <br /> In order to evaluate whether the 8,200 ug/I of Total Petroleum Hydrocarbon as Diesel <br /> (TPHd), the 19,000 ug/l of Total Recoverable Petroleum Hydrocarbons (TRPH), and the <br /> 18,000 ug/I of Oil and Grease detected in the sample from the septic tank are just <br /> incidental (i.e., kitchen grease, mechanic's hand washing, etc) as suggested by Mr. <br /> Blankinship, the chromatographs for the April 7, 2004, analyses should be submitted to <br /> EHD. In addition, please have Cal Tech Environmental Laboratories chemist or director <br /> review the chromatographs and provide their written interpretation on the relationship of <br /> the TPH-d result to the oil and grease result and the total recoverable petroleum <br /> hydrocarbon result. <br /> There has been recent EPA methodology changes regarding EPA Method 418.1. There <br /> is a new method, EPA Method 1664, that uses Silica Gel Treated Nhexane Extractable <br /> Material (SGT-HEM) to separate Non-Polar Materials (household grease, etc)from other <br /> hydrocarbons (TPHd, etc). To provide support for the thought that the TPH-d detected <br /> in the septic tank sample was kitchen grease or some other incidental hydrocarbon, you <br /> may want to analyze the septic tank contents using this method. <br /> The presence of 8,200 ug/I TPHd exceeds the water quality numerical limits for <br /> petroleum fuel constituents for Taste and Odor (100 ug/1) and Toxicity (56-140 ug/1) as <br /> listed in the Water Quality Control Plan (Basin Plan)for our beneficial use water <br /> designation of municipal and domestic supply. Therefore, an investigation to determine <br /> if soil and ground water at the site has been impacted by the petroleum hydrocarbons <br /> found in the septic tank must be conducted. The need for remedial action will be <br /> determined after the impact is investigated. <br />