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Mr. Brian Hitz <br />Central Valley Regional Water Quality Control Board <br />August 30, 2021 <br /> <br />www.arcadis.com <br />Chevron Surland Homes Site_Case Status Update_08302021 <br />2/3 <br />of the property (B-14). Soil boring B-14 was advanced to a total depth of 8.25 feet bgs. Soil samples were collected <br />at 5 feet bgs and 8 feet bgs. Dual-nested soil vapor probes were then installed at approximately 5 and 7.5 feet bgs. <br />No soil vapor samples have been collected to-date. The soil analytical results are provided as Attachment B. <br />Arcadis is preparing to install an additional dual-nested soil vapor probe (B-16) on the western side of the 2532 <br />Dorset Avenue property based on field observations, soil and soil vapor analytical results, and executed access <br />agreements. In addition, Arcadis is in the process of securing an access agreement with Union Pacific Railroad <br />(UPRR) to complete a comprehensive soil vapor sampling event, including historical soil vapor probes B-8 through <br />B-11, recently installed B-13 and B-14, and proposed B-16. The soil vapor probe locations are shown on Figure 1. <br />Arcadis is proposing the following schedule, assuming site access is granted by UPRR: <br /> By October 29, 2021: Obtain the fully executed site access agreement with UPRR. <br /> By December 17, 2021: Implement the remaining field work, including installation of B-16 and the <br />comprehensive soil vapor sampling event outlined above. <br /> By February 4, 2022: Submit the Report describing the findings, recommendations, and human health <br />screening evaluation. <br />Please contact me at christine.perez@arcadis.com or (805) 459-2391 if the Central Valley Water Board has any <br />questions concerning this site. <br /> <br />Sincerely, <br />Arcadis U.S., Inc. <br /> <br /> <br /> <br />Christine Perez <br />Project Manager <br /> <br /> <br />Email: Christine.Perez@arcadis.com <br />Mobile: 805.459.2391 <br /> <br />CC. GeoTracker <br />Michael N. Oliphant, Sr., CEMC <br /> <br /> <br />Figures: <br /> Figure 1: Site Map Showing Completed and Proposed Boring Locations <br /> <br /> <br /> <br /> <br />Tables: