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ARCADIS Ms. Amaru <br /> February 19, 2010 <br /> necessary, and with prior approval from the RWQCB if fewer than proposed are <br /> collected. <br /> The samples will be sealed, labeled, and placed in an ice-chilled cooler for delivery to <br /> a California Department of Public Health-certified analytical laboratory. Confirmation <br /> soil samples will be analyzed for the following: <br /> • TPH gasoline range by USEPA Method 8015B(M) <br /> • BTEX by USEPA Method 8021 B <br /> • TPH diesel range by USEPA Method 8015B(M) <br /> • TPH motor oil range by USEPA Method 8015B(M) <br /> • Moisture content by ASTM Method D-2216 <br /> ARCADIS will mark excavation boundaries using a handheld global positioning <br /> system (GPS). Pending the results of confirmation sampling, the excavation will be <br /> backfilled to existing grade with clean fill. Asphalt slabs damaged during excavation <br /> will be repaired to equivalent original conditions. <br /> Investigation Derived Waste <br /> As discussed above, all removed soil will be placed in roll-off bins. After the <br /> completion of excavation activities, the roll-off bins will be transported to an <br /> appropriate disposal facility. <br /> Reporting <br /> Following the completion of initial field sampling activities, additional excavation and <br /> confirmation sampling, a letter report will be prepared to summarize the field <br /> activities and sample results. All sample locations will be measured in the field and <br /> presented on a site map provided with the letter report. <br /> If you have any questions or comments, please contact me at 925.296.7827 or <br /> kathleen.abbott@arcadis-us.com. <br /> Page: <br /> 6/7 <br />