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towards the recharging of the aquifer. The Table also indicates that ander normal , or average conditions , no pumping of ground water , or river water , will be required for irrigation or maintenance of the lake Levels . Under the current operation practices at the project site , Trace C33 Lake is annually pumped dry in early spring to allow the growth of a hay crop in the lake bottoms . The current practices are actually reducing the opportunity for ground water recharge on the site , by artificially- . shortening the period during which water is retained in the lakes . The project , as currently proposed , will retain the runoff in the lakes for the maximum period possible , and will only pump from the lakes ,to the Mokelumne River during extremely wet winters . As a result , the project will actually enhance the recharge capacity of the site , such that over the life of the project there will in fact be a net gain in the aquifer water levels as a result of the project . . . Erosion hazards associated with the major earth moving to —� enlarge the makes would still exist ; but at a slightly reduced C34 impact level because of the elimination of golf course grading work. " ( Page 6-4 , draft EIR ) . The impacts from erosion of graded areas within the golf course are expected to be negligible and insignificant , as those areas will be seeded with grasses shortly after completion of the irrigation system and grading operations . Geolo9 /Soils " Without the cenefit of adequate field resting , the installation and use of individual residential septic systems in easeme;.ts as presently planned and identified by the applicant could result it, system failures , localized saturation and bacteriological contamination problems . " ( Page 3-31 . C35 Sari Joaquin County ' s ordinance requires that i he lcaci, for each lot be tested in accordance with the requirements of the Environmental Health Services Department . All tests must be conducted by a registered Civil Engineer or registered Environment aI Health Specialist . In addition all tests must be observed by a represent.ative from the Environmental Health Services Department . The septic system easement plan outlined by the applicant �ouid result in later attempts to alter easement locations on a piecemeal uncoordinated basis by indi%- idual propert;• owners c.her they undertake their own soils and percolation testing to Z)bta-r' septic system permits . This is a potentially significant impact C36 because of the increased possibility for crossing utility" ltne pipeline rupture and sewage spills . " ; Page 3-3 ) . The County ' s ordinance requires that all home sites be prr)vlded wil adequate arerA on which to locate a properlydesigned leach field , in i;ddition to an equivalent area to be reserved for future r-cplacement in M-67