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April 1, 1996 Environmental Health Dept. Attn: Mr. Mike Huggins MS-95-33 Page 2 HISTORY: As presented by the MS-93-34 study, the surrounding area has existing septic systems in use. The existing systems vary from 5 years to 60 years old and are located on parcels that range from 1.50 acres to 31 acres. Of the eight parcels listed in the MS-93- 34 study only one parcel exceeds 10 acres (APN 007-240-36). All the other parcels listed are substantially less than 10 acres, 1.5 acres to 5.20 acres. As stated in the study each parcel that was surveyed has indicated that their septic systems have been relatively problem free. GROUND WATER: The MS-93-34 report shows that the ground water depth is approximately 130 feet deep and the gradient falls northerly approximately 10 feet per mile (exhibits 2 & 3). Our review of the Lines of Equal Depth Study - Fall 1994 prepared by San Joaquin County Flood Control & Conservation District indicate that the ground water depth is approximately 140 feet and the gradient is northerly at approximately 10 feet per mile. SOILS & PERCOLATION: Per the "Soils of San Joaquin County", as published by the University of California, the - soil is San Joaquin Loam. Although our office has not performed any percolation test on the subject property, the Y MS-93-34 study performed two test holes for that subdivision (exhibit 4). Of the two test performed, test hole # 2 is with in our proposed parcel # 1 (exhibit 7). The results of the test indicate that the percolation rate is 48 minutes per inch. Pursuant to the Environmental Health Departments Sewage Standards this rate of percolation meets the requirements for a leach area of 12,000 sq. ft. CONCLUSION: Based upon our review of the MS-93-34 Study, the relative size of the proposed parcels, the historical data of the area, and current and proposed use of the subject property, it is our opinion that proposed parcels are suitable for septic systems. - Therefore we are recommending that an area of 12,000 sq. ft. be reserved for Parcels 1 and 2 of the proposed MS-95-33.