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erosion adjacent to the site. Such erosion would result from rainfall and soil runoff down hillsides next to the excavation area. Siltation is not anticipated to b-i a problem as the intermittent stream mentioned previously is located roughly two-tenths of a mile south of the work site; nor is water duality expected to be adversely affected. As stated above, processed water will not be discharged in-.,--a surface waterways ; instead, they will be channeled into settling ponds. Mitiaation : The removal of nonrenewable, natural resources cannot be mitigated; however, as suggested above, this imnict may be counterbalanced to some extent k;-cm positive social and economic impacts that will result from util.inat;.on of extracted materials within San Joaquin County. With respect to the overburden that will be removed and/or sold, two points are noteworthy. First, the County Zoning ordinance stipulates that soils removed in a quarry exca- vation be non-pri.tre agricultural soils ; chat in, the soil must be ratrcd acccT_:d.i_rg to the Soil Ccnse:::avi,c -. Service classification syr:-cm as having a Class IV cr lcf.ar rating. The SCS ccmrnent on this project states that asp:__,-i.rnatel.y Ma of the soil on the subject baa--ccl_s contains Class IV soils. The remaining 20;5, ho.-:ever, is identi.f-icd as Greenfield Gravelly Sandy Loam, a class Il soil (cne Appendix A For details) . A soil survey should be required +-o verify that the overburden to be removed for sale is Class IV or The second p4pi.nt relates to the amount of overburden tha t may be rer.c7.-ed and sold during the early part c*f the prefect;. The County should be assured t•.hat sufii.cient overburCen will remain available on-site to ac.^:e:rplish at least: t1ie degree of rehabilitation describod in the recla- maticn plan and man submitted by the app:,.i.cant.. Potentially, the project will imxprove the appearance of the site. The tailings will. be removed but the natural hil.l.t-c-? elevation will not be excavated b_n.cath a 20 fo_'r dentl'. The excavated surface will be graded level to less than Ec5 slopa; native grasses will be replanted; water and material from the settling ponds will. be recycled for irrigation of the grassland and restoration of the rangeland use. Adequate r?tigation could be accomplished by the require- ment of a more detailed reclamation plan satisfactory to the Planning Department and the State Division of Mines and Geology. 11he California Surface Mining and Reclamation (1975) requires that a reclamation plan be submitted to the DMG for quarry excavations of more than 1,000 cubic yards -22-