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Coldani Family Vineyards Winery&Olive Mill Facility Page 6 of 15 Our Project Number: NA145058 November 20, 2014 The two soil borings were advanced on the subject property with a hand auger utilizing 4-inch diameter continuous flight auger on October 27, 2014. Approximately two (2) inches of "pea gravel" were placed in the bottom of the open soil borings, then 2-inch diameter PVC pipes with perforations on the bottom were installed on top of the gravel in each boring. "Pea gravel'was then used to backfill in the annular space. Presaturation of the percolation test holes occurred approximately 24 hours prior to the day of testing (October 28, 2014). The depth of water used to pre-soak the test holes was 12 inches above the bottom of the borings. After the 24-hour soak period, the presaturated holes were found to be intact and dry on the day of testing (October 28, 2014). Percolation tests were conducted for the two borings in accordance with the requirements of the San Joaquin County EHD. Each percolation test had a duration of four hours. The last half an hour of each test was observed by Michael Escotto, Registered Environmental Health Specialist (RENS), EHD. Measurement of the water level during the percolation tests was from a fixed reference point on the PVC casing using an electric well sounder with a depth accuracy of '11100th foot. After each water drop was observed and recorded, the holes were checked for refill. The holes were refilled as necessary to maintain approximately 0.5 feet (6 inches) of water above the bottom level of the percolation test holes. The readings were taken every 30 minutes for a period of four (4) hours. A shallow percolation test is defined by the EHD as being between 36 and 42 inches in depth; a satisfactory percolation rate for a shallow percolation test is less than or equal to 60 minutes per inch drop. One percolation test must demonstrate a satisfactory percolation rate within the proposed septic system disposal field of a parcel to utilize a standard septic system. Details of the percolation tests are summarized in the table below. Summary of Percolation Tests Test No. Percolation Percolation Test Comments Date Tested Test Rate Duration (see notes) Depth (ft.) (minutes/inch) P-1 (shallow) 3 9 4-hr Satisfactory 10-28-2014 percolation rate P-2 (shallow) 3 31 4-hr Satisfactory 10-28-2014 percolation rate Note: A satisfactory percolation rate for a"shallow'test is less than or equal 60 minutes per inch. ,A4 02014 Neil 0.Anderson&Associates.A Terracon Company