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/;` IIS'•\ Evnunn G. Be.—Jn. <br /> amenr.ov <br /> � Mnrrnea Roonrouez <br /> Mater Boards Lis r o...re—ou „nr,r,rr <br /> Central Valley Regional Water Quality Control Board <br /> 15 May 2014 <br /> Mr. Kevin Dyer <br /> Shell Oil Products US <br /> 17 Junction Drive, PMB #399 <br /> Glen Carbon, IL 62034 <br /> REVIEW OF WORK PLAN, FORMER SHELL OIL PIPELINES CORDES RANCH, <br /> HANSEN ROAD, SAN JOAQUIN COUNTY <br /> Regional Water Quality Control Board, Central Valley Region (Central Valley Water <br /> Board) staff reviewed the 7 March 2014 Site Investigation Work Plan (Work Plan) <br /> submitted on your behalf by Conestoga-Rovers and Associates (CRA) for the subject <br /> site. In the Work Plan, CRA proposes investigate the extent of Light Non-Aqueous <br /> Liquid (LNAPL) detected in well MW-15 by advancing three borings to 40 feet below <br /> ground surface (bgs) and at distances of 20 to 50 feet around the well. To delineate <br /> crude oil detected at boring B-109, CRA also proposes installing a two-inch diameter <br /> monitoring approximately 90 feet northeast of the boring. The well will be installed to <br /> 50 feet bgs. Soil and groundwater samples from the borings and well will be analyzed <br /> for total petroleum hydrocarbons as crude (TPHc), benzene, toluene, ethyl-benzene, <br /> and xylenes. <br /> The Work Plan is approved. Because of current agricultural use, CRA indicates that the <br /> investigation may not be possible until after the crop harvest in June. Therefore, by <br /> 30 September 2014, submit a report of results of the investigation to this office, <br /> Geotracker, and San Joaquin County Environmental Health Department. <br /> If you have questions please contact me at (916) 464-4728 or email at <br /> msmith@waterboards.ca.gov. <br /> MICHAEL SMITH <br /> Environmental Scientist <br /> cc: Ms. Adrienne Ellsaesser, San Joaquin County Environmental Health Department <br /> Stockton <br /> Mr. Dan Lescure, Conestoga-Rovers and Associates, Sonoma <br /> Ms. Gaylyn Frosini, FedEx Ground, 1000 FedEx Drive, Moon Township, PA <br /> 15108 <br /> KARL E LorvcLEY ScD, P.E. 01AIR I PAMELA C. CREEDON P.E.. BCEE, Ex Eco'nvE DICER <br /> 11020 Sun Center Drive 4200,Rancho Cordova,CA 95570 1 v,vvw,v,atert,,uud,,ca.Bov/cenlralvaliey <br />