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1 <br /> 4 ACTIVITIES CONDUCTED <br /> i <br /> 1 <br /> 4.1 PERMITTING AND PRE-FIELD ACTIVITIES <br /> iKleinfelder's "Proposal/Cost Estimate, Pre-Abandonment Underground Storage Tank <br /> Assessment, General Mills Facility, 2000 West Turner Road, Lodi, California," dated May 2, <br /> 1 2000 was submitted to PHS/EHD for approval The monitoring well application approval was <br /> obtained on May 15, 2000, prior to initiating fieldwork The boring location area was marked <br /> in white paint and Underground Service Alert was notified at least 48 hours prior to drilling <br /> activities Additionally, the proposed boring locations were reviewed by Mr Wade Broughton <br /> of General Mills For a copy of the boring permit, please refer to Appendix C <br />' 4.2 MONITORING WELL INSTALLATION <br /> 1 A single soil bonngs (MW-1) was advanced on May 23, 2000 southwest of the existing UST at <br /> the subject site (see Plates 1) The soil boring was advanced using a truck-mounted drill ng <br /> equipped with 8-inch diameter hollow stem augers Soil samples were collected at 5-foot <br /> intervals beginning at 5 feet for logging purposes and potential chemical analysis The boring <br /> was advanced to an approximate depth of 45 feet below ground surface (bgs) The soil samples <br /> collected were field screened using an photo-ionization detector as described in Appendix B, <br /> i Section B-2 2 Photo-ionization detector (PID) readings were recorded on the boring log and <br /> ranged from 0 9 parts per million vapor (ppmv) to 284 ppmv Petroleum-like odors were noted at <br /> depths ranging from 15 to 40 feet bgs, and a grayish discoloration was noted in soil samples <br /> 1 collected at depths of about 20 to 35 feet bgs from boring MW-1 Subsurface water was <br /> encountered in the boring at a depth of approximately 35 feet bgs <br /> i The boring was drilled, logged, and sampled according to the protocol described in Appendix B <br /> A two-inch monitoring well was constructed in the boring, as generally described in Appendix B, <br /> Section B-3 1 Monitoring well MW-1 was screened from approximately 25 to 45 feet bgs The <br /> i well was screened using Schedule 40 PVC pipe with 0 020-inch factory cut slots A copy of the <br /> boring log and well construction details is presented in Appendix A <br /> 1 Nine (9) soil samples were collected from well boring MW-1 Chemical analysis was <br /> subsequently conducted on a total of 2 soil samples collected at depths of 20 and 30 feet bgs The <br /> 30 foot soil sample was the last sample collection interval before encountering groundwater and <br /> 1 within the estimated capillary fringe area <br /> Soil cuttings and decontamination water generated while drilling were placed in 55-gallon <br /> drums and left on site pending chemical analysis and disposal by the client <br /> 1 20-1417-16 E02/2000R578 July 28, 2000 <br /> ©2000 Kleinfelder, Inc Page 5 of I I <br /> 1 hl 11W F1 l)I h !8!5 l i5i h14rllc ,ir«S Y<)( kton C A 955 04 17() l (20')1'J48 1 ld i 1 109) (J48-0621 I o, <br />