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•�; - _ � - _ - '.rte �_ <br /> RISK <br /> The site presents a moderate to Nigh risk to for onvl_'onm_nt based <br /> on the following site conditions. <br /> Soils containing Total Petroleum hydrocarbons in excess of 1006 ppm <br /> were detected in two soil samples. The Department of Toxic <br /> Substance Control has designated these soils as "hazardous waste." <br /> In addition, soils with conceitrations of TPH in excess of 1000 ppm <br /> are typically required to Y)e remediated by regulatory agencies. <br /> The following is a list of soils found at the site that fall under <br /> this category. <br /> 0 Sample SBI-9' 5100 ppm (TPHg) <br /> 6 Sample MW1-9' 1100 ppm (TPHg) <br /> Soils containing petroleum hydrocarbons in excess of 100 ppm have <br /> been identified es "designated waste" and may be required to be <br /> remediated. Concentrations 'of petroleum hydrocarbons in excess of <br /> 100 ppm were detected in three soil samples in addition to those <br /> mentioned above. The samples and concentrations are as follows: <br /> ® Sample SB2-9' 220 ppm (TPHg) <br /> ® Sample MW1-9' 360 ppm (TPHd) <br /> d Sample MW3-5' 2.00 ppm (091 and Grease) <br /> F Groundwater has also been impacted by petroleum hydrocarbon <br /> contamination. Detectable concentrations of TPHg, TPHd, Toluene. <br /> Xylenes, and Oil and Grease were detected in groundwater samples. <br /> The following is a list of the pollutants detected in groundwater <br /> samples: <br /> s Sample WS-1 1500 ppb TPHg <br /> 380 ppb TPHd <br /> 6.0 ppb Toluene <br /> 2.9 ppb Xylenes <br /> 0.5 ppm Oil and Grease <br /> • Sample WS-2 160 ppb TPHd <br /> 0.5 ppm Oil and Grease <br /> The concentration of Toluene is below the Department of Toxic <br /> Substance Control's Action Level. The concentration of Xylenes is <br /> below the Maximum Contaminant Level established in Section 6444.5, <br /> Title 22 of the California Code of Regulations. No Action Level or <br /> Maximum Contaminant Level has been established for Total Petroleum <br /> Hydrocarbons._ . .. ... <br /> F <br /> AI PACE.GRANT LINE ROAD PAGE 3 <br />