SITE INFORMATION AND CORRESPONDENCE

Home Browse Search

California Regional Water Quality Control Board Central Valley Region Robert Schneider,Chair � ,.., Winston H.Hickox Gray Davis Secretaryfor Sacramento Main Office Governor Environmental Intemet Address: http://w .mcb.ca.gov/rwgcb5 Protection 3443 Routier Road,Suite A,Sacramento,California 95827-3003 Phone(916)255-3000•FAX(916)255-3015 26 July 2001 JUL 2 7 2001 ENVIRONMENTRTH IT/SERVICES Mr. Ken Price Glenn Springs Holdings, Inc 2480 Fortune Dr., Suite 300 Lexington, KY 40509 L+ i//LGcJQ CONDITIONAL APPR 0 VAL OF SOIL REMEDLI TION PLAN, OCCIDENTAL CHEMICALISIMPL 0 T FACILITY, STOCKTON, SAN JOA QUIN COUNTY The Occidental Chemical/Simplot facility at 1904 Charter Way in Stockton was an agricultural chemicals distribution center from 1955 until 1993. Glenn Springs Holdings, Inc. has responsibility for Occidental Chemical Company(OCC) and has directed its consultant, Geomatrix Consultants, to conduct soil and groundwater investigation and remediation. We have reviewed the June 2001 Soil Remediation Plan (Soil RAP)prepared by Geomatrix that proposes a soil remediation strategy. The area of the site that contains the most contaminated soil is in the former container storage area. Geomatrix proposes to excavate about 1,780 cubic yards from this 6,000-square foot former container area, stockpile the excavated material in the warehouse, and process it through a low temperature thermal destruction(LTTD) system. Treated soil will be sampled to verify destruction to at least target cleanup levels, then backfilled into the excavation. The remainder of the site will be phytoremediated with poplar trees. The trees are anticipated to facilitate microbial destruction of pesticides and uptake nitrogen and other compounds. Geomatrix proposes to prepare a RAP for phytoremediation by 1 November 2001, and implement the work plan in January 2002. We concur that the area targeted for excavation warrants thermal destruction of contaminants, and LTTD is recognized as being effective for organochlorine compounds. To verify successful destruction of contaminants, Geomatrix proposes to obtain one verification sample consisting of four composited sub-samples from every 50 tons of soil processed. Board staff requires one composited sample from every 100 cubic yards of soil processed. In our 25 July 2001 telephone conversation, Mr. Tim Souther of Geomatrix related that the LTTD device includes a scale, and it is more accurate to weigh soil than to measure its volume. We agreed that Geomatrix may obtain a composited verification sample for each 50 tons provided that it meets the 100 cubic California Environmental Protection Agency ed Recycled Paper The energy challenge facing California is real. Every Californian needs to take immediate action to reduce energy consumption. For a list of simple ways you can reduce demand and cut your energy costs,see our Web-site at http://w .swrcb.ca.gov/Mgcb5