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Page 3 <br /> Johnson International <br /> October 22, 1999 <br /> Job No. 581-103 <br /> certified laboratory for analysis. Each sample was maintained on ice (4°Celsius) after sampling and <br /> during transport to the laboratory. Laboratory personnel indicate all samples are held in a <br /> refrigeration unit at 4°Celsius. The actual laboratory results are attached. <br /> RESULTS <br /> The collected groundwater samples were submitted to a State-certified laboratory for analysis for <br /> analyses for of volatile organic compounds, total petroleum hydrocarbon (TPH) as gasoline, and <br /> methyl tert-butyl ether (MTBE) using the EPA 8260B Method, and for TPH as diesel using the <br /> modified EPA 8015 method. <br /> The data indicate that with the exception of toluene, no volatile organic compounds or TPH- <br /> gasoline were detected in the groundwater sampled from B 1 and B2. Toluene was detected in trace <br /> concentration of 1.3 part per billion (ppb) and 1.5 ppb in groundwater at B 1 and B2, respectively. <br /> TPH as diesel was detected in the groundwater samples from B 1 and B2 at concentrations of 88 and <br /> 100 ppb,respectively. <br /> CONCLUSIONS <br /> Low concentrations of TPH as diesel and toluene have been detected in groundwater beneath the <br /> subject property. Our research has indicated that the subject property has never been developed and <br /> our review of historical aerial photography and USGS quadrangles dating back to 1914 would <br /> indicate the subject property has never supported activities utilizing underground storage tanks <br /> and/or aboveground storage of hazardous chemicals. Known soil and groundwater contamination <br /> conditions have been documented on sites located westerly and adjacent to the subject property <br /> (Doane Products) and northerly and adjacent to the subject property (Mobile Bulk Plant). It is our <br /> opinion that the minor contamination detected beneath the subject property is attributed residual <br /> contamination plumbs migrating from these adjacent sources. In any event, in our opinion the <br /> detected groundwater impairment is not considered a threat to safe site usage provided that <br /> groundwater is not developed on the property. In accordance with County regulations a copy of <br /> this report has been forwarded to the SJCDPHS. <br /> 000 <br />