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STATE OF CALIFORNIA-Environmental Protection AgencY PETE WILSON Governor <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION _ <br /> 3443 Routier Road,Suite A i <br /> Sacramento,CA 95827-3098 <br /> PHONE:(916)255-3000 <br /> FAX:(916)255-3015aun+ <br /> 9 January 1997 <br /> Mr. Jack Tierney <br /> Keamey-National, Inc. <br /> Five Corporate Park Drive, Suite 114 <br /> White Plains, NY 10604-3805 <br /> ADDITIONAL GROUND WATER CHARACTERIZATION NECESSARY AT <br /> KEARNEY-KPF, STOCKTON, SAN JOAQUIN COUNTY <br /> I have reviewed the 20 November 1996 and 9 December 1996 reports from Dudek and <br /> Associates entitled Review of Quarterly Sampling Activities for the April and August 1996 <br /> ground water monitoring events, respectively, at the Kearney-KPF site in Stockton. These two <br /> quarterly monitoring events and the first quarter 1996 monitoring event have shown that TCE has <br /> increased significantly in intermediate zone monitoring well KI-12. TCE in this well has increased <br /> from 35 µgll in November 1995 to 120 µg/1 in April and August 1996. <br /> It is uncertain if the increased TCE in KI-12 is from an offsite source or from previous discharges <br /> at Kearney which migrated south of KI-12 and are now being pulled back to the extraction wells <br /> operating at Kearney. Additional characterization of ground water is necessary to determine the <br /> source and extent of TCE in the intermediate zone south of KI-12. <br /> By 4 February 1997, please submit a work plan to determine the source and extent of TCE in <br /> ground water south of KI-12. The work plan should include a schedule for conducting the <br /> investigation and reporting the results. <br /> If you have any questions, you may call me at (916) 255-3048. <br /> L <br /> -(FAY POLLY LOWRY <br /> Associate Engineering Geologist <br /> PAL:paUlsb <br /> cc: Mr. Doug O'Neal, Department of Toxic Substances Control, Sacramento <br /> Ms. Diane Hinson, San Joaquin County Public Health Services, Stockton <br /> Mr. John Rose, Kearney-National, Stockton <br /> Mr. Derrick Peterson, Esq., Texas <br /> Mr. Peter Quinlan, Dudek and Associates, Encinitas <br />