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SE C 0R . 7-Eleven Store #14117 Additional Site Assessment Report and Fate and Transport Model February 27, 2004 Page 7 in soil have been defined south of the pump islands (Figure 2 and Table 2) The lateral and vertical limits of TPHg, benzene, and MtBE in soil have also been defined east of the USTs The presence of benzene, TPHg, and MtBE in groundwater samples collected from MW-8 and SB-1 Indicate that the vertical Amit of dissolved hydrocarbons is not defined onsite south and east of the pump Islands SECOR will Incorporate MW-8 into the quarterly groundwater and monitoring program and monitor the stability of the dissolved hydrocarbon plume at depth in MW-8 The well survey results and analytical data presented In this report will be uploaded Into the State of California Geotracker database If you have any questions concerning the Information presented in the report, please feel free to call Jaff Auchterlonie at 916-861-0400 ext 223 Sincerely, SECOR International Incorporated Brian Carey ED C�O� Jaff Auchterlonle . Project Geologist Senior Geologist (:John E Bower, R G Principal Geologist BPC ®F Cp1.�F�� Figure 1 — Site Location Map Figure 2— Soil Sample Concentration Map Figure 3— Groundwater Sample Concentration Map Table 1 — Soil Boring and Well Construction Details Table 2— Historical Soil Sample Analytical Results Table 3— Soil Sample Analytical Results Table 4— Grab Groundwater Sample Analytical Results Table 5— Historical Groundwater Monitoring and Analytical Data Attachment A— Regulatory Letters and Permits Attachment B— Boring and Well Construction Logs Attachment C— Field Notes Attachment D—Well Survey Map Attachment E—Waste Disposal Documentation Attachment F—Certified Laboratory Analytical Reports and Chain-of-Custody Documentation Attachment G — Fate and Transport Model cc File, 7-Eleven Inc Ms Devra Lewis, RWQCB 14117 Vertical Assessment and Fate and Transport Model doc SECOR International Incorporated