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4.3 GEOLOGY AND SOILS Impact 4.3-2 The septic system easement plan outlined by the applicant could result in later attempts to alter easement locations on a piecemeal uncoordinated basis by individual property owners when they undertake their own soils and percolation testing to obtain septic system permits. This is a potentially significant impact because of the increased possibility for crossing utility lines, pipeline rupture and sewage spills. Another possible consequence of the proposed project is that the severe septic system constraints would be recognized at the time of site development,and in response, piecemeal investigations would be made by individual property owners to locate and acquire suitable septic system easements. This would result in an uncoordinated maze of sewage pipelines and leachfield systems throughout the project area. Mitigation 4.3-2 Based on the results offield investigations,delineate and map the recommended disposal site to serve each building whether it be on-lot or within a dedicated easement. This should be completed prior to final map approval. Prepare and record all sewage disposal easements, including easements for pipeline and disposal areas. Impact 4.3-3 Normal inspection and maintenance of septic systems could be ignored because of the remote location of leachfields with respect to the building site, adding to chances of premature system failure. This is a potentially significant impact. The individual homeowner would not be in a position to observe and attend to any leachfield maintenance problems,because of the remote location of the leachfield,e.g., on the golf course. This is a potential problem,since leachfield systems should be inspected periodically and attended to as necessary. A single-maintenance entity(such as a homeowner's association or special district), with authority over all septic systems, is normally considered the best means to oversee the inspection and maintenance of septic systems located on common or remote easement areas as proposed for the project. San Joaquin County regulations require that a public entity be established for new land development of more than 100 lots or in any case where water quality or public health is threatened by septic systems. Because of the relatively small number of lots involved, it is the judgment of the EIR authors that a private entity (e.g., homeowner's association) could adequately provide the necessary maintenance functions to prevent water quality and public health problems. 4.3-8