Agmt13 Redwood City Partners, LLC Dewatering License

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ATTACHMENT F—FACT SHEET As described in Section II of this Order, this Fact Sheet includes the legal requirements and technical rationale that serve as the basis for the requirements of this Order. This Order has been prepared under a standardized format to accommodate a broad range of discharge requirements for dischargers in California. Except where identified as "not applicable", all sections or subsections are applicable to the discharges regulated under this Order. This Order is intended to cover discharges of extracted and treated groundwater resulting from the cleanup of groundwater polluted by volatile organic compounds (VOC), fuel leaks, and other related wastes. This Order combines two previously issued Regional Water Board orders: a. R2-2006-0075,NPDES General Permit for the discharge of extracted and treated groundwater resulting from the cleanup of groundwater polluted by fuel leaks and other related wastes at service stations and similar sites (Fuel General Permit), and b. R2-2009-0059,NPDES General Perxnit for the discharge of extracted and treated groundwater resulting from the cleanup of groundwater polluted by volatile organic compounds (VOC General Permit). The VOC General Permit remains in effect and the dischargers authorized under this permit will need to seek coverage under this Order no later than April 3, 2014. I. PERMIT INFORMATION From 1980 to date, approximately 11,000 sites with underground fuel or VOC storage tanks in the San Francisco Bay Region are known to be leaking or to have leaked. Historically, a number of these sites were cleaned-up by extracting and treating contaminated groundwater and discharging treated groundwater to surface water. Because the number of such applications exceeded the capacity of available Regional Water Board staff to develop and bring individual waste discharge requirements to the Regional Water Board for adoption, in the early 1990s, the Regional Water Board issued National Pollutant Discharge Elimination System(NPDES) General Permits to cover such discharges. In 1991,the Regional Water Board issued the Fuel General Permit. This permit was reissued in 1996, 2001, and 2006. The 2006 permit(Regional Water Board Order No. R2-2006-0075) expired on January 12, 2012. There are 20 current Dischargers covered under this pernut. In 2011, 18 Dischargers submitted Notice of Intent(NOI) applications to either continue discharging or initiate the discharge of treated groundwater to surface water under the Fuel General Perxnit after it expires. In 1994, the Regional Water Board issued the VOC General Permit. This permit was reissued in 1999, 2004, and 2009. The current VOC General Permit(Regional Water Board Order No. R2- 2009-0059) was adopted on August 12, 2009,became effective October 1, 2009, and expires September 30, 2014. There are 56 current Dischargers covered under this permit. The Fuel General Permit needs to be reissued because 18 Dischargers have submitted NOI applications to either continue discharging or initiate the discharge of treated groundwater to surface water. In addition,within the next five years, it is anticipated that a number of fuel-contaminated sites will be conducting cleanup by extracting contaminated groundwater,treating, and discharging Attachment F—Fact Sheet F-3 For VOC and Fuel General NPDES Permit No.CAG912002