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• Identified Contamination Source Evaluation <br /> 9. 5950 E. Woodbridge, Robert Based on the 2006 incident, it <br /> Mondavi, Hazardous Materials, appears possible that contamination <br /> Hazardous Waste Generators, may exist at this facility. The extent <br /> Underground Storage Tanks, of the contamination, if any, is <br /> Aboveground Storage Tanks, Site unknown. <br /> Mitigation, and Leaking <br /> Underground Storage Tanks lists. <br /> This facility is located slightly <br /> beyond one-quarter mile southwest <br /> of the Site. According to records <br /> reviewed, it appears that <br /> underground fuel tanks totaling <br /> 8,250 gallons were removed from <br /> the facility in 1986; at that time, the <br /> Environmental Health Division <br /> issued a "no further action" letter <br /> based on analytical testing results <br /> provided. However, a 2006 <br /> complaint investigation form <br /> indicated that five people from a <br /> • concrete company became sick <br /> while removing and replacing a <br /> cement slab at the facility; the <br /> foreman stated his belief that the <br /> soil was contaminated. No further <br /> discussion of this incident was <br /> identified in the records. (Current <br /> and past off-site) <br /> 10. Eight wells that had been tested for It appears that DBCP and nitrate <br /> nitrate and/or DBCP were identified may exist in regional ground water <br /> at addresses within approximately in excess of the regulatory <br /> one-half mile of the subject Site. thresholds. The domestic well on <br /> Six of the wells had been tested for the Site will be tested for these <br /> DBCP; it was detected in five wells, constituents as part of the Soil <br /> at concentrations of 0.090 to 4.27 Suitability Study to follow. <br /> µg/L. Five of the wells had been <br /> tested for nitrate; it was detected in <br /> all five at concentrations of 1.0 to <br /> 50 mg/L-NO3. The Maximum <br /> Contaminant Level (MCL) set by <br /> the US EPA for nitrate as NO3 is 45 <br /> • mg/L. The MCL for DBCP is 0.2 <br /> µg/L. (Current and past off-site) <br /> LOGE 1720 11 <br />