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California R?gional Water Qualitypontroloar <br /> Central Valley Region <br /> Robert Schneider,Chair <br /> Winston H.Hickox Gray Davis <br /> Secreturyfor Sacramento Main Office Governor <br /> Environmental Internet Address: http://H,xN-%v.swrcb.ca.gov/nvgcb5 <br /> Protection 3443 Routier Road.Suite A.Sacramento.California 95827-3003 <br /> Phone(916)255-3000•FAX(916)255-3015 <br /> 6 September 2001 <br /> Mr. Kevin Basso <br /> General Manager <br /> Forward Inc. <br /> 1145 West Charger Way <br /> Stockton, CA 95206 <br /> REVIEW OF RESEILTS OF STATISTICAL IS OF ARSEATIC AND <br /> BEXAVALENTC O DETECTED IN GROUNDWATER, FORWARD LANDFILL, <br /> SAN JOAQUIN COUNTY (CASE NO. 2209) <br /> We have reviewed the Results of Statistical Analysis of Arsenic and Hexavalent Chromium Detected in <br /> Groundwater at the Forward Landfill in San Joaquin County submitted on 29 August 2001 by Levine— <br /> Fricke. The report uses Shapiro-Wilk's Test with a 5% significance level to establish tolerance limits for <br /> arsenic and hexavalent chromium. The evaluation indicates that the concentrations of arsenic and <br /> hexavalent chromium in background and compliance wells are not the result of a release from Forward <br /> Landfill. <br /> Apparently elevated concentrations of arsenic and hexavalent chromium are part of background <br /> conditions at the Forward site. Given the toxic nature of arsenic and hexavalent chromium board staff <br /> requests that Forward Inc. continue to monitor arsenic and hexavalent chromium on a quarterly basis. <br /> Arsenic and hexavalent chromium will be added to the monitoring parameters for detection monitoring <br /> when at the next revision of the WDRs, expected in Fall 2001. <br /> If you have any questions,please call me at(916) 255-3814. <br /> ROSS D. ATKINSON <br /> Associate Engineering Geologist <br /> cc: Mr. Robert McClellan, San Joaquin County LEA, Stockton <br /> Mr. Geno Yekta, CIMWB, Sacramento. <br /> Mr. Butch Stafani, Forward Landfill Operations Manager, Stockton. <br /> Ms. Sangeeta Lewis, Lewis Engineering, Piedmont. <br /> Mr. Curt Fuji, Forward Inc. <br /> RDA:C:\mydocuments\forward\hexCr <br /> California Environmental Protection Agency <br /> Ca Recycled Paper <br /> The energy challenge facing California is real. Every Californian needs to take immediate action to reduce energy consumption. <br /> For a list of simple ways you can reduce demand and cut your energy costs,see our Web-site at http://www.swrcb.ca.gov/rwgcb5 <br />