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• Former Tracy Pump Station, 14821 W. Grant Line, located 800 feet northeast of the Site, Site Mitigation database. Live Oak reviewed records on file at the San Joaquin County Environmental Health Department for this facility. According to documents reviewed, this facility was a booster/heater station for the Old Valley Pipeline. Heated crude oil was transmitted through this pipeline. At the Tracy Pump Station facility, petroleum hydrocarbons, polynuclear aromatic hydrocarbons (PAHs), and benzene, toluene, ethylbenzene, and xylenes (BTEX) compounds were detected in the soil and ground water in the area of a former blow -off pond in 2002 and 2004. The documents assume a ground -water flow direction toward the northeast, away from the subject Site. In 2011, excavation of the contaminated soil was proposed. As if 2013, it appears that investigation was ongoing. Based on the record reviewed, no evidence of an impact to the subject Site from this facility was identified. • Catellus/Chevron, 14824 W. Grant Line, located 800 feet east of the Site, Site Mitigation database. Live Oak reviewed records on file at the San Joaquin County Environmental Health Department for this facility. According to documents reviewed, this facility includes portions of the Old Valley Pipeline and the Tidewater Associated Oil Company pipeline, both of which carried crude oil. In 2003, a release of crude oil was discovered on this property, and subsequent testing identified petroleum hydrocarbons, PAHs, and BTEX compounds impacting soil and ground water. In 2012, the California Regional Water Quality Control Board issued a "proposed no further action required" letter for this property, stating that "crude oil affected soil and groundwater has been delineated." Based on the records reviewed, no evidence of an impact to the subject Site from this facility was identified. Live Oak searched the San Joaquin County Haz Mat Viewer on March 16, 2022 for the Site and nearby facilities with hazardous materials inventories. The Site was not labeled as a hazardous materials handler, and no such facilities were identified within one-quarter of a mile of the Site. Live Oak reviewed the San Joaquin County Environmental Health Department's maps of Nitrate — Land Use Data and DBCP — Land Use Data dated February 20, 2019. According to the nitrate map (Plate 4), eight wells within a one -mile radius of the subject Site have been tested; nitrate was detected in three of the wells at concentrations between 0.1 and 5.0 mg/L-N, in two wells at concentrations between 5.1 and 10.0 mg/L-N, and three wells at concentrations over 10 mg/L- N. Four wells within a one -mile radius of the Site were tested for DBCP (Plate 5); DBCP was not detected in any of the wells. The Maximum Contaminant Level (MCL) set by the US EPA for nitrate is 10 mg/L-N; the MCL for DBCP is 0.2 ug/L. LOGE 2214 7