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Limited Site Investigation � ferracon <br /> Vacant Property I Tracy, California <br /> May 26, 2023 1 Terracon Project No. NA197074B <br /> reporting limits. Based upon our interpretation of quality control information provided by <br /> the laboratory, it is our opinion that the overall dataset is qualified as useable for the <br /> purposes of this LSI. <br /> 5.0 Data Evaluation <br /> Based on the future planned use of the overall property as mixed use (residential and <br /> commercial/industrial) the LTCP was utilized to evaluate the data. The following present <br /> the results for the soil and groundwater samples collected during the investigation. <br /> 5.1 Soil Analytical Results <br /> The soil sample analytical results are tabulated in Appendix B. Table 1 — Summary of <br /> Soil Analytical Results, and the laboratory analytical reports and chain-of-custody <br /> records are attached in Appendix D. <br /> 5.1.1 Total Petroleum Hydrocarbons <br /> TPH-GRO and TPH-DRO were reported in soil samples collected from boring SB17 at 4 <br /> feet bgs at concentrations of 1,300 mg/Kg and 3,500 mg/Kg, respectively; however, <br /> TPH-GRO and TPH-DRO were not reported above the laboratory detection limit of 10 <br /> mg/Kg in the samples collected from 11 feet and 30 feet bgs. TPH-GRO and TPH-DRO <br /> were not detected above the laboratory reporting limit of 10 mg/Kg in the other 16 soil <br /> samples analyzed during the investigation. TPH-ORO was reported in soil samples <br /> collected from SB17 at 4 feet bgs at concentrations of 3,200 mg/Kg. Furthermore, TPH- <br /> ORO was reported above the laboratory detection limit of 10 mg/Kg in the samples <br /> collected from 11 feet and 30 feet bgs at 39 mg/Kg and 38 mg/Kg, respectively. <br /> Additionally, TPH-ORO was reported slightly above detection limits ranging from 38 <br /> mg/Kg to 54 mg/Kg in samples collected from SB18 through SB22. TPH-ORO was not <br /> reported in shallow samples collected from SB22 through SB26. <br /> 5.1.2 Volatile Organic Compounds <br /> Concentrations of limited VOCs were detected above reporting limits in the soil samples <br /> analyzed from SB17 at depths of 4 feet bgs, 11 feet bgs, and 30 feet bgs. VOCs were <br /> not detected above reporting limits in the remaining 14 samples analyzed. <br /> 5.2 Groundwater Analytical Results <br /> The groundwater sample results are tabulated in Appendix B. Table 2 — Summary of <br /> Groundwater Analytical Results, and the laboratory analytical reports and chain-of- <br /> custody records are attached in Appendix D. <br /> Facilities I Environmental I Geotechnical I Materials 10 <br />