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The above conflicts with study by Flood Control and <br /> Water Conservation , Fall of 1985, which has a depth of <br /> 60 feet . ( See Exhibit 3) . It appears that the water <br /> table has fallen 10 to 15 feet in the last five years . <br /> The generally northerly fall of the gradient of the <br /> water table is approximately 15 feet per mile . (See <br /> Exhibit 4) . <br /> WATER <br /> Water samples were collected and tested for Nitrates <br /> and 6.B .C.P. <br /> The results of those tests are included in this report <br /> as Exhibits 6a and '6b. <br /> SOILS AND PERCOLATION TESTS <br /> The soil is Hanford Sandy Loam and per "Soils of San <br /> Joaquin County" as published by the University of <br /> California it is the predominate soil for a radius of a <br /> half mile. There is an island of Dinuba Fine Sandy <br /> Loam near the test site. <br /> A 6 inch diameter by 3 foot deep test hole was dug on <br /> the site. Under the supervision of the San Joaquin <br /> County Health Department a percolation test was run and <br /> the rate of percolation was measured at 9 minutes/inch <br /> and 18 minutes/inch on Parcels 1 and 2 respectively . <br /> See Exhibit 5. <br /> CONCLUSION <br /> Based upon the results of our percolation tests, <br /> interviews, and other data, it is my opinion that the <br /> subject property is suitable for septic systems and I <br /> that the use of septic systems will not adversely <br /> affect the quality of ground water . <br /> I recommend that 6,000 to 8,000 S.F. be reserved on <br /> Parcels 1 and 2 respectively for leach areas. <br /> LIMITATIONS <br /> I <br /> The conclusions of this report are based on the <br /> information provided regarding the existing and <br /> proposed development , and on the site conditions as <br /> they existed at the time we excavated our test hole and <br /> performed the percolation test . It was assumed that <br /> the test hole and percolation test results are <br /> representative of the subsurface conditions in the I <br /> general area . <br /> h <br /> i <br />