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Limited Site Investigation Irerracon Vacant Property ■Tracy, California November 13, 2020 ■Terracon Project No. NA197074 In addition, the soil samples collected from locations S139 through S1316, advanced to investigate impacts of the soil stockpiled from past remedial activities (excavation of impacted soil), confirmed that the stockpile soil is impacted with petroleum hydrocarbons. 9.0 RECOMMENDATIONS Based on the findings of this investigation, the planned future use of the property for commercial/industrial use, the location of the reported impacts in boring S137 relative to the pipeline and utility easement and building restrictions, vertical delineation at boring S137, Terracon recommends additional step-out borings to further delineate impacts identified during the investigation. In addition, shallow confirmation soil samples should be considered in the area of the former soil stockpiles to investigate that impacts do not remain in shallow soil. Sandhu Brothers Farms may use the soil analytical results as a baseline for existing environmental site conditions for comparison with future assessment results or evaluations of areas that may be subject to future investigations, if necessary. 10.0 STANDARD OF CARE AND RELIANCE 10.1 Standard of Care Terracon's services were performed in a manner consistent with generally accepted practices of the profession undertaken in similar studies in the same geographical area during the same time. Terracon makes no warranties, either express or implied, regarding the findings, conclusions, or recommendations. Please note that Terracon does not warrant the work of laboratories, regulatory agencies, or other third parties supplying information used in the preparation of the report. These LSI services were performed in accordance with the scope of work agreed with you, our client, as reflected in our proposal and were not restricted by ASTM E1903-11 Standard Practice for Environmental Site Assessments:Phase 11 Environmental Site Assessment Process. For the type of subsurface investigations performed on this site, strict adherence to ASTM E1903- 11 is not necessary to assess if a release has occurred. 10.2 Additional Scope Limitations Findings, conclusions, and recommendations resulting from these services are based upon information derived from the on-site activities and other services performed under this scope of work; such information is subject to change over time. Certain indicators of the presence of hazardous substances, petroleum products, or other constituents may have been latent, inaccessible, unobservable, non-detectable, or not present during these services. We cannot Responsive ■ Resourceful ■ Reliable 8