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California fegional Water • <br /> l\� u <br /> Q ality Control Board <br /> Central Valley Region <br /> Winston H.Hickox Robert Schneider,Chair ". <br /> Secretaryfor <br /> Environmental Sacramento Main Office Gray Davis <br /> Protection Intemet Address: http://www.swrcb.ca.gov/rwgcb5 Governor <br /> 3443 Routler Road,Suite A,SacramntoCalifornia <br /> (9m95827-3003 <br /> 16 October 2003 Phone(916)255-3000•PAX 255-3015 tt�n EC E M E n <br /> OCT 17 2003 <br /> Mr. Robert Cochran ENVIRONMENT HEALTH <br /> Chevron Environmental Management Company PERMIT/SERVICES <br /> P.O. Box 6012 <br /> San Ramon, CA 94583-2324 <br /> REVIEW OF WORK PLAN FOR UNDERGROUND UTILITY SEARCH, SOUTH SHORE <br /> PARCELS, L&M OPERABLE UNIT, STOCKTON, SAN JOAQUIN COUNTY <br /> submitted by SECOR International Incorporated(SECOR)oWe have reviewed the 3 October 2003 Work Plan for Underground Utility Search (Work Plan) <br /> behalf of <br /> (OU). The Work Plan proposes eight locations to excavate sn the L&M Operable Unit <br /> oil using a backhoe or similar <br /> equipment down to about 10 feet below ground surface to search for underground utility lines and <br /> determine if any existing underground utility lines are a source of soil and groundwater pollution at <br /> the site. The L&M OU also proposes to conduct a utility survey and excavation at additional <br /> locations if the utility survey shows potential for additional underground utilities. On <br /> 10 October 2003, Regional Board staff contacted Mr. Rusty Benkosky of SECOR to discuss <br /> comments on the Work Plan. Mr. Benkosky responded on 14 October that the locations were <br /> proposed based on locations of pipelines shown on old site maps and that the utility survey was not <br /> completed before the submittal of the Work Plan because site access is needed, which the Stockton <br /> Redevelopment Agency typically does not grant without regulatory concurrence with the proposed <br /> investigation. Furthermore, Mr. Benkosky said the L&M OU is not proposing soil samples because <br /> of the large amount of soil data already collected at the site, and the purpose of the investigation is <br /> to locate underground utilities. <br /> Regional Board staff concurs with the Work Plan and suggests that the L&M OU collect evidence <br /> of any suspected releases from underground utilities located. By 9 January 2004,please submit an <br /> investigation report detailing the field activities and summary of any underground utilities located. <br /> If you have any questions, you may contact me at (916)255-3119 or underground <br /> swr ties located. <br /> DEVRA LEWIS <br /> Environmental Scientist <br /> cc: See Page 2 <br /> California Environmental Protection Agency <br /> Co Recycled Paper <br /> The energy challenge facing Califomia is real. Every Californian needs to take immediate action to reduce energy consumption. <br /> For a list of simple ways you can reduce demand and cut your energy costs,see our Web-site at http://w -Mcb.ca.gov/rwgcb5 <br />