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...:».-:.^.ae ... $[S:a.. - •r' °x3red. .a T."s^.m".�ieec'c_ v° u" 110_� i."£" 111 .a „_,. ... i.. ,s. .. Table.2.1.SUMMARY QF iMP.ACTS.AND TIGATION MEASUfRES — M ., '. :, r= ., , ;: 4 Level of Significance Levet of Significance Environmental Impact Before Mitigation Mitigation Measures After Mitigation LS S LS SU Impact-4:2i A-4 A-1,A-2& Mitigation Measure 4.2-7a(A-1,A-2&A-3) All Alts. Dvel eopm`e'nt of Perci,ed. A-3 G'roundwater-W--- The proponent shall install three monitoring wells around the perimeter of the processing wastewater basin in the Phase IV area to monitor the potential presence of perched groundwater in the vicinity of the basin. The monitoring wells shall be designed by a registered engineer or geologist. The wells shall be installed to a minimum depth of 10 feet below the elevation of the invert of the Delta Mendota Canal(for Alternatives 1 and 2)or the California Aqueduct(for Alternative 3). The proponent shall y monitor groundwater levels quarterly and submit annual monitoring reports to the Development Services Division, which include recommended corrective actions,if necessary. If corrective actions are required, the proponent shall implement such actions under the direction of the Development Services Division, Impact 4.2-8 A-4 A-1,A-2& Mitigation Measure 4.2-8a(A-1,A-2&A-3) All Alts. Reduction in Agricultural Capability A-3 fV of Soil Resources Prior to commencement of mining,the proponent shall be required to submit a soil reconstruction plan . p� prepared by a qualified soil scientist which establishes specific procedures for the amendment of soil used for agricultural reclamation at the project site. The plan shall present recommendations for suitable soil texture and the types and application rates of soil amendment products. At a minimum, 3 the upper three feet reconstruction surface soils shall have an organic content of one percent The plan shall demonstrate that potential migration of amendments to surface water or groundwater shall not result in reduction of water quality. In addition, the plan shall provide for procedures and specifications for a soil fertility and crop productivity monitoring program for test plots within the Phase 1 mining/reclamation area. Productivity goals shall be established on the basis of crop productivity of adjacent lands currently under agricultural production. The soil reconstruction plan shall be submitted to the Development Services Division and Office of the Agricultural Commissioner for review and approval. Mitigation Measure 4.2-8b(A-1,A-2&A-3) j The proponent shall submit soil sample analysis from an independent laboratory for two-foot and four- foot depths(five random sample locations per 100 acres)of reclaimed soil. The analysis shall demonstrate that a minimum of 85 percent of the soil samples meet the specifications presented in Mitigation Measure 4.2-8a. LS=less than significant A-1 =Proposed Project S=significant A-2=Proposed Project with Afternate Northern Access Road SU=significant and unavoidable A-3=Proposed Project with Alternate Southern Access Road to New Interchange ' A-4=No Project I } I