SITE INFORMATION AND CORRESPONDENCE

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WASTE DISCHARGE REQUIRES GENERAL ORDER NO. R5-2008-010 9 IN-SITU GROUNDWATER REMEDIATION AT SITES IMPACTED BY VOLATILE ORGANIC COMPOUNDS, NITROGEN COMPOUNDS, PERCHLORATE, PESTICIDES, SEMI-VOLATILE COMPOUNDS, HEXAVALENT CHROMIUM AND/OR PETROLEUM HYDROCARBONS v. Macro nutrients such as nitrate, phosphate, and potassium vi. Microorganisms cultured on site materials b. Amendments that create oxidizing conditions (i.e., amendments that provide oxygen or otherwise gain electrons). Examples include: i. Air ii. Oxygen iii. Ozone iv. Potassium or sodium permanganate v. Oxygen release compounds vi. Hydrogen peroxide c. Multiple amendments (includes application of reducing agents or oxidizing agents or both applied concurrently or over time as proposed in an approved Work Plan and the Notice of Intent). Examples include: i. Establishing a reducing zone immediately downgradient of an oxidizing zone to reduce hexavalent chromium that may be produced under oxidizing conditions ii. Providing a slowly degradable carbon source along with polysulfides to precipitate sulfates as metal sulfides. d. Tracer compounds as discussed in Attachment A (Notice of Intent/Report of Waste Discharge). e. Biofouling control agents such as chlorine dioxide, chlorine and bleach. 5. Amendments specifically excluded from coverage under this Order: a. Amendments that may cause violent exothermic reactions. B. NOTIFICATION OF COVERAGE Project coverage under this Order shall not take effect until the Executive Officer notifies the Discharger in writing, by issuance of a Notice of Applicability which shall be a part of this Order, that coverage has been issued. The Executive Officer will not issue notification of project coverage under this Order prior to providing notice and a 30-day public comment period on the proposed issuance of coverage. Notification of project coverage under this Order shall not be issued if the Executive Officer finds that there may be significant effects on water quality, or finds that significant public controversy has arisen or will likely arise from the issuance of project coverage by this Order and that individual Waste Discharge Requirements should be considered at a regularly scheduled Regional Water Board meeting.