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eScreenLogic <br />Environmental Solutions <br />December 13, 2018 <br />San Joaquin County <br />Environmental Health Department <br />Site Mitigation Unit <br />1868 E HazeIton Avenue, Stockton, CA 95205 <br />RE: Workplan <br />Boring Permit Application <br />730 Channel Street <br />Stockton, CA 95202 <br />On behalf of the property owner (Community Health Centers, Inc) eScreenLogic presents a <br />workplan to accompany a Soil Boring Permit Application for the above referenced site in <br />Stockton, California. <br />1.0 Background <br />The subject site consists of a single commercial building on the southwest corner of the <br />intersection of Channel Street and E Weber Avenue. At the time of a Phase I Environmental <br />Site Assessment performed in September of this year, the site was identified as a vacant <br />warehouse building. According to the San Joaquin County Assessor's office the building sits <br />on a 0.890-acre lot and appeared to be constructed sometime between 1917 and 1930 <br />based on Sanborn/Fire Insurance Maps and Historical Aerial Photographs. <br />According to the Phase I Report, two (2) LUST cases are associated with the subject site's <br />historic use as a bus transit line and repair facility. This investigation will not be associated <br />with the previous investigations associated with the closed LUST case files on the northern <br />portion of the subject site. <br />2.0 Purpose <br />The Phase I Environmental Site Assessment performed on the property identified a <br />Recognized Environmental Condition (REC) based on the southern adjacent property's <br />lengthy historic use as an automotive repair facility (69+ years) located at 729 E Weber <br />Avenue. Investigations associated with the two LUST cases did not extend to the southern <br />portion of the property which lies immediately down-gradient of this long-time historic <br />automotive repair site. In order to vet out potential impact from an off-site source, <br />eScreenLogic proposes to install up to three (3) temporary soil borings to approximately 25- <br />foot depths immediately east of the historic automotive facility. Soil samples will be <br />analyzed for TPH/BTEX/VOCs.