Laserfiche WebLink
_ r <br /> California Regional Water Quality ontrol Board - <br /> Central Valley Region <br /> Winston H. Hickox <br /> Steven T.Butler,Chair <br /> Sccrerm7 jor Sacramento Main Office Gray Davis <br /> GovernorEnvironmental Internet Address: http://www.swrcb.ca.gov/—rwgcb5 <br /> Protection 3443 Routier Road,Suite A,Sacramento,California 95827-3003 <br /> Phone(91 G)255-3000•FAX(91 G)255-3015 <br /> C2) <br /> C_ <br /> 1 June 2000 <br /> 1 <br /> r� <br /> Mr. Mike Owens <br /> Fox River Paper Company, Ripon Mill <br /> 942 South Stockton Avenue <br /> Ripon, CA 95366 w <br /> FOA'RIVER PAPER COMPANY FACILITY, RIPON, SAN JOAQUIN COUNTY(Case File No. <br /> 449) <br /> Regional Board staff has reviewed your consultant's letter dated 15 May 2000 that was written in <br /> response to my continent letter dated 14 April 2000. Prior to conducting the field work, please address <br /> the following remaining concerns: <br /> 1. RMT indicates that groundwater collected on 9 February 2000 from monitoring well OB-11 was <br /> analyzed for dioxins and furans. The sample was filtered in the laboratory prior to analysis. <br /> RMT indicates that the results were non-detect for all cogeners except for OCDD, which was <br /> reported at 0.18 ng/1. Additionally, RMT reports that a laboratory blank also contained OCDD at <br /> a reported concentration of 0.22 ng/1. The groundwater samples were collected by Lawrence and <br /> Associates during the regularly scheduled quarterly monitoring event, however, the laboratory <br /> reports for this analysis was not included in the quarterly report dated 19 May 2000. The <br /> laboratory reports and quality assurance/quality control data shall be submitted to staff of the <br /> Regional Board prior to our determination regarding impact of dioxin to groundwater in OB-11. <br /> Please submit the requested groundwater data for OB-11 by 19 June 2000. As you indicated in <br /> our telephone conversation on 24 May 2000, RMT is compiling this data and will forward it to <br /> me. <br /> 2. The background soil samples shall be analyzed for Title 22 total metals, rather than only selected <br /> metals,just as the impoundment sludge and soil samples were during the original investigation in <br /> 1998. <br /> 3. RMT reasons that because OCDD in groundwater might be attributable to laboratory <br /> contamination, there is not a technical reason for assessing the concentrations of dioxins and <br /> furans in the background soil; however, Regional Board staff opinion is that because dioxins and <br /> furans were reported in the sludge samples previously collected, the background soil samples <br /> should be analyzed for dioxins/furans to enable your consultant to determine if the levels of those <br /> constituents in the sludge varies significantly from those in background soil samples. Therefore, <br /> in addition to metals, the background soil samples shall also be analyzed for the presence of <br /> dioxins/furans. <br /> 4. Mounding of groundwater in the shallow, semi-perched aquifer may make it impossible to select <br /> an upgradient well from which to collect background samples. "Background"may also be <br /> represented by a suitably situated downgradient or cross-gradient well that does not appear to be <br /> California Environmental Protection Agency <br /> 0a Recycled Paper <br />