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• <br /> ' now AV .0 joelie <br /> _Alf 6,10 <br /> 6 TATE OF CAUFORNiA400F � _ .r... <br /> C <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD— <br /> CENTRAL VALLEY REGION <br /> 9443 ROOTIER ROAD, SUITE A <br /> SACRAMENTO, CA 95827.3098 RECEIVED' D <br /> PHONE: (916) 381.5600 <br /> FAX: (fib) 361.6856 BY Ir/p/C. S.A`. _ <br /> 31 July 1991 AUG - 11991 <br /> A'„ <br /> 7181911011111261121314{$8 <br /> Ms. Kelye A. McKinney A <br /> Kennedy/Jenks/Chilton <br /> 3336 Bradshaw Road, Suite 140 <br /> Sacramento, CA 95827 <br /> SITE REMEDIATION OF THE FORMER CAL-FARM SUPPLY IN STOCKTON, SAM JOAQUIN COUNTY <br /> Regional Board Agricultural Regulatory staff have reviewed your 17 June 1991 <br /> submittal regarding the above-named facility, titled "Phase II Site Investigation <br /> and Site Closure Report." The review and this response applies only to the <br /> pesticide contamination at the site. The underground tank portion of the cleanup <br /> is the responsibility of our Underground Tanks Unit, and the assigned staffperson <br /> is Elizabeth Thayer, who can be reached at (916) 361-5726. <br /> The organochlorine compounds of concern here are essentially insoluble in water, <br /> and have-a very low mobility in soil . Moreover, the boring and well logs show <br /> that the underlying Soils to a minimum of 25 feet are predominantly clays with <br /> only minor amounts of sand and silt. - <br /> Based On these factors and our review of both the preliminary investigation and <br /> closure reports, we believe that pesticide contamination at the site has been <br /> reduced to levels which will not pose a threat to either surface or ground <br /> waters. <br /> Therefore, the Regional Board Agricultural Regulatory Unit does not anticipate <br /> further involvement with this site. Also, from our perspective, the monitoring <br /> wells are no longer needed and may be properly abandoned, as you request. - You <br /> must check with Elizabeth Thayer, however, -before proceeding with this. All _ <br /> city, county, and state permitting and notification requirements should be met <br /> before the wells are closed._ <br /> Since the site involved soils with hazardous levels of pesticides, a copy of the <br /> report should be submitted to the Department of Health Services for their review. <br /> If you have any questions or concerns regarding these matters, please contact me _ <br /> at (916) 361-5703. <br /> I CHRISTINE M. HOLM <br /> Agricultural Regulatory Unit <br /> cc: Ms. Eleanor Ratliff, San Joaquin Co. Environmental Health Dept. , Stockton <br /> Department of Health Services, Toxic Substances Control Program, Site <br /> Mitigation Unit, Sacramento <br /> TZT-0 Hi8ONIIHN ?1 S3-laUHJ Wd7E:TO 76, ZO d3Sr+r•-E0wE1i- <br />