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k'9 KLEINFELDER An employee owned company File No. 20-4685-O1.GO1 February 5, 2002 MAR 12 2002 ENVIRONMENT HEALTH Mr. George Vieria PERMIT/SERVICES California Milk Market, Inc. 1429 Stanislaus Street Escalon, California 95320 Subject: SOILS SUITABILITY STUDY PROPOSED CLUBHOUSE FIELD OF DREAMS PROJECT 31157 STATE ROUTE 120 ESCALON, CALIFORNIA Dear Mr. Vieria: As requested, this letter presents the results of our percolation tests performed in the leach field area for the proposed clubhouse in order to complete the soil suitability study for the subject project. We reference our letter of December 12, 2001, for information regarding the proposed development, present use of the site, historical groundwater depths in the project area, percolation test results in the residential leach field area, our evaluation for nitrate-loading, and the results of chemical tests performed on a groundwater sample. The percolation tests for the clubhouse leach field were not performed during our original investigation because the site was soft, wet and not accessible to our truck-mounted drill rig. The percolation tests were performed in accordance with accepted guidelines using clear potable water. The procedure calls for first placing about 2 inches of fine gravel at the bottom of the bore hole, installing a perforated PVC casing, and then placing additional gravel. The holes were then pre-soaked with water at least 24 hours prior to performing the tests. The tests are performed by first adding about 6 to 12 inches of water to the hole. From a fixed reference point, the drop in water level was measured in approximate y 30-minute intervals for 4 hours, refilling as necessary to maintain the original head of water over the gravel. Under the observation of a sanitarian from the San Joaquin County Public Health Department, the last 30- minute reading of the monitoring period was recorded and used to calculate the percolation rate in minutes per inch. The estimated percolation rates at each test location are as summarized below. A copy of our field percolation test results is attached. Test Number Depth, ft. Percolation Rate min./inch P-3 3.5 250 Pi P-4 14.75 6.6 �p 204685-01.G01/2002RO85 February 5,2002 ©2002 Kleinfelder,Inc. Page 1 of 2 KLEINFELDER 2825 East Myrtle Street,Stockton,CA 95205-4794 (209)948-1345 (209)948-0621 fax