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Trimark letter of April 26, 2000, Mountain regarding the quantity and themountain House stormtdrainage runoff* �Services District have expressed concerns Trimark Communities and th -_ 12 2 00 July 27 2000, and May 23, 2000, attached.) House CSD letters of May Existing peak flow leaving the site in the approved initial development nt in acres exceeds Department of development p ment shall be restricted to the flow rate peak flow and diverts additional watersheds toward Mountain House. The e roved 80 acre site. Public Works also recommends that Public Works recommends that drainage runoff from this develop Hous issued that existed prior to the construction of the app storm water discharge permit the water quality of the storm water discharge to Patterson di Run s of any not cause the Mountain ruse Community Services District to be in violation of any applicant shall submit a Storm to the Mountain House Community Services Dederal istrict by the State of California pl the shall Environmental Protection Agency under the Federal leaor revien approval.The app at Water Pollution Prevention Plan to the County Patterer n royal and Development Agreements for the Patterson pass Bwale oniness the ark The original conditions of app habitat along an ephemeral watercourse and drainagercel to be addressed the issue el conserving F, ure 12). Patterson Run is a ten-foot- Tri-StatelCheng parcel known as Patterson a south-_toflown( bisects the 204-acre amended to the Special Purpose Plan, supports freshwater marsh and royal for the Patterson wide natural channel that carries runoff from the hills. The nal conditions rte ced by establishing a 50-foot-wide hydrophytic species such as cattails and rushes. The original conditions of approval of Fish and each bank or other oft-site mitigation approved by the State Dep Pass Business Park state that the Patterson Pass Run shall be p, buffer strip along Game and the U. S. Fish and Wildlife Service. specific locations of building pads, parking areas, and The ADT Auto Aucfion application has proposed sp Fi ure 13). The site plan indicates a 50-foot with fencing io s installed. The 50-foot setback is observed for bridges which would cross Patterson Run in two locations ( e would span the channel,where the permits setback on either side of Patterson Run, licant would be required to obtain p the length of the channel except in the area where two b h arcment of Fish and Game, if any filling, setbacks are approximately 25 to 30 feet on each side. The app from the U.S. Army Corps of Engineers and the California Dep royal. The P y original conditions of app grading, road or utility construction would be conducted in the Patterson Run drainage swa applicant's proposal substantial) complies with the orig' Wetlands adjacent to the Delta Mendota Canal, designated as Area Ian Fi ure 13). Two additional drainages are located within and to the Patterson Run flows into a wetlands area adj Drainage "A" is an ephemeral flow from a Oil the ADT Auto Auction site p �A9and Drainage"B". which ends abruptly in a cultivated north of the project site: Drainage . culvert under the California Aqueduct located.north of Patterson un, field (Figure 13). proposed Aqueduct located north of the p P for the proposed ADT Auto Auction Drainage"B" also flows from a culvert under the California Aq the two northern-most Special Purpose Plan Amendment area and north of the bon roc ss of acquiring (Figure 5). At the time of this writing,the applicant is in the p parcels(north of the to the Delta With Mendta plans to retain the land in open space use. Drainage°B flows into a pond adjacent 1998, included in Appendix B of the verified a wetlands and jurisdictional delineation or 3. The U.S. Army Corps of Engineers has reviewed and The delineation indicates that approximately Special Purpose Plan). 2.04 acres of the Patterson Run the drainages and wetland/pond areas(letter of September pp_99-2, DA 90-1\Tracy Industrial 6 San Joaquin County Community Development