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%Wolf S ECOR — <br /> Ms. Vicky McCartney <br /> September 15, 2003 <br /> Page 8 <br /> surveyed wellhead elevations, latitude and longitude coordinates of the wells, <br /> and depth to water measurements obtained from the wells prior to sampling, a <br /> potentiometric surface map will be constructed, and the off-site groundwater flow <br /> direction and hydraulic gradient will be determined. <br /> • Soil and Water Disposal. Soil cuttings generated during drilling operations will <br /> be temporarily stored on-site and covered with plastic sheeting pending <br /> characterization and disposal. Soil cuttings will be removed and transported by a <br /> ConocoPhillips' disposal contractor to an appropriate disposal facility. Water <br /> generated during the steam cleaning of drilling equipment during the installation <br /> and development of the wells will be temporarily stored on-site in California State <br /> Department of Transportation (DOT)-approved 55-gallon drums also pending <br /> transport by ConocoPhillips' disposal contractor to an appropriate disposal <br /> facility. Soil cuttings and rinsate/purge water drums will be temporarily stored on- <br /> site for approximately 4 to 8 weeks. <br /> • Report. Following the completion of well installation activities, SECOR will <br /> submit a report documenting the findings of the investigation. The report will <br /> include soil boring logs, permits, soil and groundwater analytical results, chain-of- <br /> custody documentation, and conclusions. <br /> SCHEDULE <br /> SECOR is prepared to initiate the coordination of fieldwork activities, following approval of the revised <br /> ]RAP and work plan for OS well installation/additional off-site assessment by the SJCEHD, and <br /> following the receipt of necessary permits. A report documenting the findings of the assessment will <br /> be submitted approximately six to eight weeks following the completion of fieldwork activities and <br /> upon receipt of laboratory analytical data. It is anticipated that construction and start-up of the OS <br /> system will be completed in approximately 3 months. <br /> l <br /> If there are any questions, please call us at (916) 861-0400. <br /> Sincerely, <br /> SECOR International, Incorporated <br /> Iwl l ff'f J,cd �1�VV ��pROfESS.. <br /> Kristen Flesoras `�G <br /> Project Scientist cc NO,C 058399 rn <br /> f Exp, <br /> >rr <br /> ^_ `�xq CMt- <br /> us y enkosky, P. �QFC4L1i0���P <br /> Senior Engineer <br /> I:1ConocoPhi11ips\Tosco Marketing1111931Reports\Revised IRAP&wP.doc <br />