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As in the case of the water and sanitary sewer lines,a modification of the conceptual storm drainage collection system originally outlined in the 1994 Special Purpose Plan would be required to reflect the already constructed improvements and the site plan for the proposed ADT Auto Auction. The original alignments of the public loop road and stormwater lines to serve individual industrial lots should be deleted (Figure 11). Instead, a private storm drain system would be constructed to serve the entire site. The already constructed storm drain line running parallel to the Delta Mendota Canal would connect the detention basin with the other developed portions of the Tri-State/Cheng parcel. VISUAL RESOURCE ANALYSIS A visual corridor study has been completed for the proposed auto auction project. The study indicates that the visual effects of the project measured at three representative locations along the I-580 and I-205 freeways can be substantially softened and mitigated by planting of numerous trees to screen the project buildings. The site plans show the location of landscaping. BIOLOGICAL ANALYSIS Background As summarized in the Special Purpose Plan, the developer of the Patterson Pass Business Park was required to mitigate for potential impacts of development on two sensitive species,the San Joaquin kit fox and the burrowing owl. A Biological Opinion specifying mitigation requirements for the kit fox was issued by the U.S.Fish and Wildlife Service in September, 1991. Prologis entered into an agreement with the California Department of Fish and Game, which included the purchase and granting of a conservation easement for 627 acres of kit fox habitat.The developer was also required to construct four artificial nests for burrowing owls in the northern portion of the property. The Development Agreement and conditions of approval for the project call for periodic monitoring of the site and pre-construction kit fox surveys for all new construction. Recent Pre-construction Surveys and Monitoring Staff from the biological consulting firm of LSA (previously Resource Management International and WESCO) have performed numerous pre-construction surveys and periodic monitoring of the Patterson Pass Business Park area over the last nine years. Wildlife biologists have completed pre- construction kit fox surveys for areas south of Schulte Road and for lands west of Mountain House Parkway. During a daytime survey of Patterson Run on August 17, 1999,an LSA biologist spotted a kit fox along the bank of the channel. The sighting of the kit fox was reported to the U.S.Fish and Wildlife Service (letter of September 7, 1999 in Appendix A). Up until August, 1999, no other kit fox had been sighted. LSA biologists have conducted inspections of numerous potential kit fox dens (ground squirrel holes) and have monitored for fox tracks and have hand-excavated dens. The biologists have met with construction supervisors in areas of the business park that have been developed and have provided brochures describing kit fox protection measures. The LSA biologist notes in the letter to USFWS that "the project proponent continues to implement the protection measures for kit foxes as stipulated in the Biological Opinion in a consistent and conscientious manner and has maintained a high level of compliance with the 93231-B0.spp00.sspd-224/00 —21—