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Disposal of Drilling Fluids-Drilling fluids used in operations such as Horizontal Directional Drilling may be classified as"discharges" <br /> or"solid wastes,"and in general, should be pumped or vacuumed from the construction area, removed from the State Highway Right <br /> of Way, and disposed of at permitted facilities that specifically accept such wastes. Disposal of drilling fluids into storm drains,storm <br /> sewers,roadside ditches or any other type of man-made or natural waterway is prohibited by Water Quality Control and/or Solid <br /> Waste regulations. Small quantities of drilling fluid solids(less than 1 cubic yard of solids)may be left on-site after either being <br /> separated from fluids or after infiltration of the water, provided: 1)the drilling fluid consists of only water and bentonite clay,or,if <br /> required for proper drilling properties, small quantities of polymer additives that are approved for use in drinking water well drilling;2) <br /> the solids are fully contained in a pit, and are not likely to pose a nuisance to future work in the area, 3)the solids are covered and the <br /> area restored as required by CDOT permit requirements(Utility,Special Use, or Access Permits,etc.). Contact Information: <br /> Contact CDPHE telephone#'s listed above). <br /> Noxious Weeds and Invasive Species Management Plan—Noxious Weeds and Invasive Species guidance can be found by <br /> contacting the Colorado Department of Agriculture(htti)s://www.colorado.Qov/pacific/aQconservation/noxiousweeds)and the <br /> Colorado Division of Parks and Wildlife(nttp:llcr)w.state.co.us/aboutus/Paaes/RS-NoxiousWeeds-.Aqpx).In either case, management <br /> tans involving the control of noxious weeds associated with the permitted activity and cleaning of equipment will be required. <br /> Concrete Washout-Waste generated from concrete activities shall NOT be allowed to flow into the drainage ways, inlets,receiving <br /> waters,or in the CDOT ROW. Concrete waste shall be placed in a temporary concrete washout facility and must be located a <br /> minimum of 50 feet from state waters,drainageways,and inlets.Concrete washout shall only be performed as specified by the CDOT <br /> Environmental Program and shall be in accordance to CDOT specifications and guidelines. Contact Information:Contact CDPHE or <br /> find additional information on the CDOT website:htt. i-ort'201 1-construction- <br /> s,�ecifications/201.17S ecs_and refer to the specifications and their revisions for sections 101, 107 and 208. <br /> Spill Reporting-Spills shall be contained and cleaned up as soon as possible. Spills shall NOT be washed down into the storm <br /> drain or buried.All spills shall be reported to the CDOT Illicit Discharge Hotline at(303)512-4446(41-12O),as well as the Regional <br /> Permitting Office and Regional Maintenance Supervisor.Spills on highways, into waterways,any spill in the highway right-of-way <br /> exceeding 25 gallons,or that may otherwise present an immediate danger to the public shall be reported by calling 911,and shall also <br /> be reported to the CDPHE at 1-877-518-5608. More information can be found at https iiwwv:.colorado.govinacificicdphe.'enzeryency_ <br /> re ,ortin.;-line <br /> Environmental Clearances Information Page 1 of 3 Colorado Department of August <br />