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' 3.0 SOIL REMEDIATION Excavation and offsite disposal of soil with COPC concentrations exceeding proposed residential cleanup goals was proposed in our approved SREW. ICS mobilized to the Site February 21, 2017 to implement the proposed remedial measures. ' Proposed excavation limits for RCRA and California hazardous soil were field staked by Geocon and an X-Ray Fluorescence (XRF)portable detector was used by Geocon to screen for lead levels during excavation activities. Proposed excavation limits were expanded in areas where ' elevated XRF readings were recorded and in areas where visible evidence of firing range impact was observed. Confirmation samples were collected March 16 and 17, 2017 from the bottom and sidewalls of the excavation. ICS re-mobilized to the Site June 1, 2017 to remove soil in areas where the ' March 2017 confirmation samples exceeded cleanup goals. Final excavation activities were completed June 8, 2017. Additional confirmation samples were collected June 5 and 8, 2017 to ' verify that all soil had been removed from the firing range that exceeded Site cleanup goals. ' Excavated soil was direct loaded into trucks where feasible for transportation to Clean Harbors for disposal. In the event a truck was not available, excavated soil was stockpiled temporarily (maximum of one day)within the excavation over areas that had not been excavated. Temporary stockpiles left overnight were covered with plastic and surrounded by temporary waddles. A total of 1,184.09 tons of soil exceeding RCRA hazardous waste criteria and 1,701.48 tons exceeding California hazardous waste criteria were excavated and transported to Clean Harbors under appropriate manifest documentation. Copies of manifests and weight tickets for the RCRA waste are included in Appendix B and manifests and weight tickets for the California ' hazardous waste are included in Appendix C. 3.1 MARCH 2017 CONFIRMATION SAMPLING ' Confirmation samples were collected by Mr. Dickinson with Pacific Edge on March 16, 2017 and by Geocon on March 17, 20173. A map depicting a grid with proposed sample locations was provided to Mr. Kith with SJCEHD prior to collection of the confirmation samples. The sampling grid was modified in the field to address the actual excavation limits(slightly larger ' than the proposed limits)based on input and direction from Mr. Kith. All confirmation samples were collected under the direct oversight of a representative from the SJCEHD. t 3 Two bottom samples were collected by Gecon in the area excavated March 17, 2017 due to a Pacific Edge ' scheduling conflict. 1PACIFIC EDGE ENGINEERING 2 Closure Report_final.doc ' (949)4701937;(949)470-0943(FAX)