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r 8�• �' TeC7llf+rjr t l 1 1 SAN JOAQUIN COUNTY COMMUNITY DEVELOPMENT DEPARTMENT 1810 E.HAZEL70N AVE.,STOCKTON'CA 95205-6232 04[fFO' �P PHONE:2091468-3121 FAX:2091468-3163 May 4, 2000 MEMORANDUM r l TO: Development Committee FROM Kai Luoma Associate Planner t SUBJECT: REVISION OF APPROVED ACTIONS APPLICATION FOR r QUARRY EXCAVATION NO-OX-96-11OF DSS COMPANY. -------------------------------------------------- The project is a Revision of Approved Actions application for approved Quarry Excavation QX- 96-1tomodify Community Development Department Conditions of Approval No's 1.n. and 1.u., and Public Works Conditions of Approval No's 2.a.(1), 2.d., 2.c., 2.f., and 2.g. The application also includes the relocation of the sedimentation ponds to the east side of the project site during Phase 1 and the construction of a dike around the pond to increase capacity. As excavation progresses to the next phase, the ponds will be relocated into the bottom of the previously excavated phase. Condition 1.n. currently requires that only one phase may be excavated while the previous phase is being reclaimed. The revision would result in one phase being excavated, one phase being used for settling ponds, and a third phase being reclaimed. Condition 1.u. requires that pond water not exceed the elevation of the invert of the Delta-Mendota Canal to prevent damage to the canal lining from pond-water seepage. The revision would permit the water level C to exceed the elevation of the invert of the canal if monitoring wells were.established between f the pond and the canal to monitor water seepage from the ponds to the canal. The revised pond location and design has been reviewed and approved by the Delta-Mendota Water Authority. The revisions to Public Works Conditions of Approval include the elimination of all references to Koster Road, which the Quarry will not use for access, and revisions to terminology regarding financial security. After reviewing the application and responses from other agencies, the Community Development Department offers the following comments: • Condition 1.n.: This condition will need no revision. Staff has concluded that the sedimentation ponds are an integral component of the processing of the mined material and, as such, can be considered part of the processing plant. Therefore, the operation will comply with this condition: a single phase will be undergoing reclamation as a single phase is being excavated.