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The following Recognized Environmental Conditions (RECs) were identified in connection with the subject property: • The historical use of the subject property by various auto parts and towing companies in conjunction with the presence of an on-site septic tank, and the lack of sampling data, represents a REC at the subject property. • The historical use of the subject property by various auto parts and towing companies in conjunction with the presence of an on-site grease trap (installed in approximately 1984) represents a REC at the subject property. Therefore, FR recommended a subsurface investigation at the subject property. On August 6, 2021, FR conducted a Phase II Limited Subsurface Investigation at the subject property and subsequently produced a Phase II Limited Subsurface Investigation Report, dated August 20, 2021. Below is a summary of findings from FR's Phase II Report: • All VOC and TPH results in soil were below detection limits for the samples analyzed. Low concentrations of metals were detected in one or more soil samples. All soil results are below their applicable screening levels under California DTSC guidance or within expected background concentration ranges. • Elevated soil vapor results were reported for benzene and naphthalene. However, industry standard attenuation factors predict contaminant concentrations below indoor air screening levels using two of the three attenuation factors. Further risk assessment conducted using EPA- OLEM vapor intrusion risk assessment guidance indicate that no human health risk or reportable condition is present from contaminants detected in soil vapor at the subject property at this time. • Elevated concentrations of TPH-DRO were detected in two out of three groundwater samples analyzed above the TPH-DRO ESL of 100 µg/L. Therefore, FR recommends further subsurface investigation in the form of groundwater sampling at the subject property. Pre-drilling Activities • Perform Site Visit to verify existing conditions and pre-mark boring locations and notify Underground Service Alert (USA) of the intent to excavate or drill and use standard care to avoid potential damage to subsurface utilities. • A Site-specific Health and Safety Plan (Level D Health & Safety according to OSHA CFR 1910.120), will be prepared. Scope of Work/Field Investigation 3