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NPDES Monitoring Requirement -3 - 10 September 2001 Minimum Levels(MI..) listed in Appendix 4 of the SIP or the Detection Limits for Reporting Purposes (DLRs)published by the Department of Health Services which are below the controlling water quality criteria concentrations listed in Attachment If of this letter. In cases where the controlling water quality criteria concentrations are below the detection limits of all approved analytical methods, the best available procedure will be utilized that meets the lowest of the MLs and DLR. Also listed are suggested analytical procedures. You are not required to use these specific procedures as long as the procedure you select achieves the desired minimum detection level. All analyses must be performed by a California certified environmental analytical laboratory. Attachment III-Dioxin and furan sampling. Section 3 of the SIP has specific requirements for the collection of samples for analysis of dioxin and furan congeners,which are detailed in Attachment III. Briefly, dischargers classified as major must collect and analyze two samples per year(one collected in the wet season and one collected in the dry season)for congeners in each of the next three years. For dischargers classified as minor, one wet season and one dry season sample must be collected and analyzed at some time during the next three years. Attachment IV—Reporting Requirements. This,attachment provides laboratory and reporting requirements including a recommended data reporting format. With the exception of dioxin and furan congener sampling which is due by 1 November 2004 (see Attachment DI), all samples shall be collected, analyses completed, and monitoring data shall be submitted to the Regional Board by 1 March 2003. Any NPDES permit application submitted after 1 March 2002 shall include with the application at least one set of data for the constituents listed in Attachment H. In the interest of generating and submitting data by the required dates, a schedule for compliance with this data request shall be prepared and submitted to the Executive Officer by 22 October 2001. This schedule shall include the requirements of Attachment I and Attachment M. The schedule will also include the data submission requirements for applications submitted after 1 March 2002. Failure or refusal to submit technical or monitoring data as required by Section 13267, California Water Code, or falsifying any information provided is guilty of a misdemeanor and is subject to an administrative civil liability of up to $1,000.per day of violation,in accordance with Section 13268, California Water Code.' If you,have any questions,please contact your Regional Board staff representative. GARY M. CARLTON Attachments (4) Executive Officer Available on the intemet at htto://www.swrcb.ca.gov/rwacb5/wq goals.