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Pap6 Properties, Inc. January 11,2015 Limited Phase II ESA 10842 S Harlan Rd, French Camp, CA 1.6 Conclusions Based on the analytical testing results of the Limited Phase II ESA,we conclude that: • Diesel fuel constituents in low concentrations are confirmed as present in soil at the lease area. These results suggest the occurrence of one or more past releases. A"release" is a term used to describe a leak or spill associated with an aboveground or underground fuel transfer, an engine leak, improper disposal of fuel, etc. • Based on the groundwater data from the single sampling event,there were no indications of VOC that are typically attributed to a past diesel release. • The cardlock facility continues to present the highest risk of a release that could impact the project site. However, routine leak-detection monitoring of the UST and appurtenances, presuming it is properly conducted, reduces future risk of a release. • The Phase II ESA data,showing a northerly gradient,was roughly consistent with L&P's 2006 investigation at the cardlock site. Collectively,this demonstrates that the project site office and shop building is approximately cross-gradient from the cardlock facility,the significance being it suggests a low-risk potential risk for groundwater migration of diesel in the event of a future release at the cardlock, and a negligible potential risk for soil-vapor intrusion into the building from either previous or future releases. It should be noted that more comprehensive groundwater data,covering seasonal variations, may indicate seasonal shifts resulting from groundwater pumping, irrigation,or other factors. • 50 mg/Kg of diesel detected is less than one-half the Environmental Screening Level (ESL)for TPH-diesel in soils at commercial and industrial sites,occurring in either shallow or deep soils, where groundwater is a potential source of drinking water. "Shallow"soils are defined in the ESL document as near-surface soils with depths less than three meters. "Deep"soils are defined as those at depths greater than three meters. Based on the currently available data, it is unlikely that an environmental regulatory agency would request further assessment on the project site based on the results of this Phase II ESA. • The source of the diesel, i.e.the release(s), predates Pape's operations within the lease area. Diesel constituents in the soil, and any that may migrate to groundwater, are not the responsibility of Pape. 1.7 Reporting The Phase II ESA report has been transmitted to the Client, Pape Group,who will have sole authority to share the results of the assessment with the property owner or others, and to comply with requirements set for by the LOP, including transmission of findings. ■ PA004.02 P H I I(14) 5 1:\Pape\004 Kenworth\02.French Camp\2014\Phase II ESA.docx CALEDONIA