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California Regional Water Quality Control Board . <br /> Central Valley Region - <br /> Steven T.Butler,Chair Gray Davis <br /> Winston 11 MCI= Governor <br /> Secretary for Sacramento MWO Office <br /> ,Environmental Intemet Address: http:Uwww.swrcb,ca.gov/-�rwgcb5 <br /> Protection 3443 Routier Road,Suite A,Sacramento,California 95827-3RECE�YED <br /> Phone(9 16)255-3000-FAX(916)255-3015 <br /> 8 August 2000 AUG 1 7 <br /> 2000 <br /> Mr. John Chavez ENVIRONMENT HEALTH <br /> Project Director PERMIT/SERVICES <br /> Burlington.Northem &Santa Fe Railway Co. <br /> 740 E. Carnegie Drive <br /> -San'Bernardino, California 92480 <br /> REVIEW OF WOIRKPLAA'FORE'VALUATIONOPBACKC ROUP OPO DBNSF <br /> D WATER <br /> QUALITY OIL WATER SEPARATOR AND EVAPORATION <br /> POND <br /> SAN JOA QUINCOUNTY; CALIFORNIA <br /> We have reviewed the Workplan for Evaluation of Background ground Water Quality at the proposed <br /> BNSF Stockton Intermodal Facility and the,Addendum submitted on 4,August 2000 by TRC <br /> Environmental Solutions, Inc. The workplan proposes to install one upgradient monitoring well with: a <br /> borehole to approximately 10 Feet below static water level; a 2-inch schedule 40 PVC well with 20 feet <br /> of 0.01 inch well screen installed so that 10 feet are below static water level and 10 feet are above; sand <br /> pack to 3 feet above the screen; 5-feet of bentonite seal; and seal to surface with cement-bentonite grout. <br /> The surface:completion will be a traffic rated cover with a locking well cap. <br /> We concur with the work plan for installing a background monitoring well,you may install the well <br /> when you have obtained the well permit from San Joaquin County. <br /> If you have any questions,please call me at(91.6) 255-3814. <br /> ROSS D. NTYINSON <br /> Associate Engineering Geologist <br /> cc: Mr. Allen,Blodgett, TRC E-avirownental Solutions, Inc. Irvine, California. <br /> R-DA; C:\mydocuments\BNSF\approvewetlplaz <br /> California Environmental Protection Agency <br /> ca Recycled Paper <br />