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• Laboratory analysis of groundwater samples identified various `heavy metals,' including; arsenic, barium, and chromium. The reported concentrations of these `heavy metals' were below the regulatory RSLs and comparative ESLs. • Analysis of groundwater samples did not identify any OCPs above the LLD. 6.0 CONCLUSIONS Based upon the data collected during the Phase I ESA and the field investigation of the subject property, the following conclusions have been developed: • Zions Bank holds a secured interest in the subject property and authorized the investigation of the site as a part of due diligence associated with foreclosure to evaluate the environmental conditions of the real property collateral (subject property) and the potential for the operations of the mortgagor, historic site uses,and/or off-site facilities to have adversely impacted the subject property. Analytical results and analysis are limited to the locations sampled during this investigation. • Soils encountered at the subject property consisted predominantly of silty sand to roughly 10 to 14 feet bgs then grading to a fine-grained sand and clay mixture. Groundwater was encountered in seven of the ten borings advanced at the subject property between 16.5 and 20 feet bgs. No visible staining and/or olfactory indications of impacted soils or groundwater were noted during drilling activities. • Detected concentrations of arsenic in soil samples were reported at levels above the comparable ESLs as well as the applicable RSLs. However, it appears that the reported arsenic levels identified in soils samples from the site are within reported background concentrations found throughout California. The concentrations of arsenic in the soil samples collected from various locations across the site and analyzed appeared to be more or less consistent without significant variation suggesting a lack of potential contaminant source(s) or primary area(s) of concern. Additionally, the entirety of the subject property is covered by buildings,concrete foundations, and/or asphalt, which generally serves as a confining cap and preventing direct exposure. As such, arsenic in the soil samples from the site appeared to be within background concentrations; and relatively immobile in the subsurface due to the presence of a confin. ing.cap,which also prevents direct contact and exposure to soils at the site. ----------------- Cassociated ry analysis of groundwater samples collected and analyzed idenh to ©RO in borings` 70 micrograms per liter(µg/L); B-2W at 270 µg/L; and B-7W at 58 µg/L. The RSL have a regulatory level for TPH-DRO in groundwater; however, the reported conc DRO was found to be above the referenced ESL of 100 µg/L in groundwater samplB-2 is located near an area that formerly contained an aboveground storage tank.rations of TPH-DRO for Boring B-2 in soil were not identified in near surface soilsgesting a source(s) of petroleum hydrocarbons found in the groundwater sample ma ed with surface spills or releases from the former ASTs on the site. • Various VOCs and other RCRA 8 Metals were detected above the LLD in various soil and groundwater samples. None of these reported concentrations of the constituents exceeded regulatory RSLs and/or referenced ESLs. No OCPs were found above the laboratory LLD. • The presence of contaminants of concern,specifically TPH-DRO in groundwater,which was reported at concentrations above corresponding regulatory reference levels would be considered to be a `reportable condition' requiring notification of the San Joaquin County Environmental Health Department in accordance with applicable rules. Zions First National Bank Limited Subsurface Investigation 1u—ch Valentine Properties-Manteca, California