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Geotechnical/Alquist-Priolo Earthquake Fault Zone The Alquist-Priolo Earthquake Fault Zone for the Calaveras fault traverses the upper portion of the Austin property near Lots 5 and 6. The site was analyzed by the applicants' consultant, Ber- logar Geotechnical Consultants, with their findings peer-reviewed by Cotton, Shires and Associ- ates under supervision by the City Engineer. The analyses determined that the site will support the proposed development in its proposed configuration with standard engineering practices. As shown on the development plan and grading/drainage plan, the geotechnical building setback line encroaches onto the west sides of Lots 5 and 6. All habitable structures must be constructed outside this setback line. Staff notes that the side yard building setback recommended by staff in the "Design Guidelines" section of staff report is compatible with the geotechnical building setback line. The applicants are required to annex this development into the Lemoine Ranch Geologic Hazard Abatement District (GRAD). In addition to the Lemoine development, GHADs cover the Golden Eagle Estates, Kolb Ranch, Moller Ranch, Oak Hill Estates, Oak Tree Farms, and Pre- serve developments. The project developer will be responsible for preparing the necessary documentation to annex this development to the Lemoine Ranch GHAD including any expenses of the City's geotechnical engineer for the GHAD. Upon recordation of the final subdivision map, the lot owners will be responsible for paying the future annual GRAD assessments for the development. GradinglUrban Stormwater Runoff Grading The proposed grading plan - Figure 10 on Page 25 - was determined by several factors: . To the greatest extent feasible, depress the entire development into the property by cut- ting into the hillside in order to reduce its visibility to the Laguna Oaks development. . Preserve the three swales/seeps, which flank and bisect the development. Staff notes that these swales/seeps are subject to the Army Corps of Engineers and the Regional Water Quality Control Board jurisdictions. . Grading sensitive to the site's topography given its topographic complexities. . Preserve the existing trees on the caretaker's property, which will become Lots 7 and 8. The proposed grading plan incorporates the following features to meet these goals: . All lots will be "cut" into the hillside. The depth of the cuts will vary from an average of seven feet for Lots 1,3, and 5 up to an average of 11 feet for Lot 4 and Lot 6. . A retaining wall will be used along the south side of the street, opposite Lots 2 and 3, in order to preserve the swale/seep. . Lot 4 will be graded with a four-foot split pad. Item 6.c., PUD-58 and PGPA-II Page 24 of 34 August 23, 2006