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TABLE 3 - UNO ICIAL PERCOLATION,TEST,RESULTS FOR,.THE DISPOSAL AREA ,'!. WIT CORRESPONDING�APPLICATIONtRATES;IN GALLONS/FTS/DAY 4" 24 INCH DEEP PERC TEST BORING 62.5 minAnch : / 0.335 gallons/ft'/day PERCOLATION RATE./APPLICATION RATE 36 INCH,DEEP PERC TEST BORING 20.8 min/inch / 0.643 gallons/ft'/day PERCOLATION RATE/-APPLICATION.:RATE 40 INCH DEEP PERC.TEST BORING 8.9'min/inch / 0.857 gallons/ft2/day PERCOLATION RATE 1 APPLICATION RATE AVERAGE PERC RATES'AND INFILTRATION.RATES 31.2 min/inch 1 0.627 gallons/112/day BETWEEN THE 36 AND 42 INCH OFFICIAL TESTS AND THE 36 AND 40 INCH UNOFFICIAL.TESTS Application Rate adapted from California State Water Resources Control Hoard Guidelines far the Design of.Sewage Syslems.and is based on the Pere Rate. Double Ring Infiltrometer Tests 'In'addition to the conventional percolation tests described above;a double ring infltrometer test was conducted near the percolation.tests. This test was done under ASTM Test Method for Infiltration Rate of Soils.in Field Usin Double-Ring Infiltrometers - D3385. The infiltrometer test measures the incremental.infiltration velocity, which is the quantity of flow per unit area, over an increment of time.(cm3-cm2/sec).--Infiltration is the downward entry of liquid into the soil and is measured by the infiitrorneter. :. This test method involves driving two open cylinders; one inside the other, into the soil and then filling the rings with water; for these tests to a depth of 7.62 cm. The annular spaces were presaturated with 12 inches of water the day before testing. No soil cracking was observedin the soil surface. The purpose of the outer ring is to promote one-dimensional, vertical flow beneath the inner ring. The volume of water added to the inner ring to maintain the liquid level constant with the starting value, is the-measure of water that infiltrates the soil-. Water volume infiltrated during 30 minute intervals for four hours-.is converted to an incremental infiltration velocity expressed in centimeters per hour(cm/lit), cm/sec and mih/in, as 'illustrated in Table 4, below. The infiltration test rresults confirm the 24 inch percolation test results in.which there is virtually no infiltration and percolation within the top two feet of the soil, at its-existing elevation. TABLE 4 INFILTRATION -TEST 'RESULTS AT-241NCH DEPTH" 'INFILTRATION RATE IN CM/HR,CM/SEC,MIN/IN AND APPLICATION RATE IN GALLONS/FT2I DAY 1..49 cm/hr, 0.0004'1'cm/sec, 102.0 min/in,0.200 gallons/ftz/da Application Rate adapted from California Stale Waier Resources Control Hoard Guidelines.for the Design of Sewage Systems and is based on the Perc Rate. - 6 Chesney Consulting