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34 Sensitive Receptors <br />' On July 13, 2000, Tait published a well receptor survey within 2,000 feet of the site Tait identified <br /> nine water supply wells within 2,000 feet of the site, including seven wells owned by the California <br /> Water Service Company According to Tait, the nearest water well to the site is the irrigation well at <br /> Stribley Park, approximately 650 feet north of the former UST#3 Tait's well receptor survey is <br />' included as Appendix B <br /> Based on the nature and extent of impacted soil and groundwater and results of the sensitive <br /> rreceptor survey, two potential receptors may be subject to exposure on-site commercial workers <br /> and future construction workers Both potential receptors may be exposed by inhaling indoor air, <br />' impacted by volatile organic vapors from surface and subsurface soil The on-site commercial <br /> workers may also be exposed by inhaling volatile organic vapors emitted from subsurface soil and <br /> groundwater into buildings via foundation cracks Possible future construction workers may also be <br /> exposed by dermal contact with contaminated soil <br />' Based on the depth of impacted soil beneath the site, it appears unlikely that impacted subsurface <br /> soil would present a significant dermal or inhalation hazard Due to the distance to the identified <br /> water supply wells, ingestion of impacted groundwater by residential users does not appear to be a <br /> threat A Site Conceptual Exposure Model is included as Appendix C <br />' 35 Preferential Pathways <br />' Given the absence of underground utilities in close proximity to the former UST system, and the <br /> depth to groundwater of approximately 45 feet, man-made conduits, such as utility trenches or <br /> vaults, do not appear to be significant preferential contaminant transport pathways beneath the site <br />' 10 <br />