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7851.4.001.01 Bright Development July 20, 2007 APN 240-040-02, 24832 South Lammers Road Page 6 SOIL SUITABILITY STUDY 6.0 PERCOLATION TEST INFORMATION 6.1 Percolation Test Locations The percolation test locations are depicted on the Site Map; Figure and on the attached Percolation Test Rate forms. Due to the large size of the Property, di ensions to existing site features are generally shown on the Percolation Test Rate forms. 6.2 NumberAT,ercolation Tests Performed A minimum of one rcolation test was performed on each of the tlu-ee parcels proposed by the minor subdivi ion a lication; with two tests performed on the southenunost parcel, Parcel C. 6.3 Percolation Test Dates and Times The percolat' n t is were performed on July 17, 2007. The test holes were all 4'/z inches in diameter an 42 nches deep. The bottom of the test holes were first scarified, then an approximate -' ch-thick layer of clean pea gravel was placed on the bottom of the hole and a 3-inch-diameter perforated pipe was placed down the hole. Additional pea gravel was placed around the pipe up to the ground surface. For pre-soaking, the holes were completely filled with clean tap water sourced from a domestic-use well located on W. Ectcheverry Drive in Tracy. 6.4 Pre-Soak Period The holes were presoaked the morningCated 6, 2007. ;After the 4-hour pre-soak period, the test holes were intact and approximatelt wate' remained i test holes B1, C1 and C2. All of the water in test hole Al had perovernig 6.5 Percolation Test Procedures Water was removed from test holes B1, C1 and C2 to approximately 6'inches above the gravel and the percolation rate was measured over a 30-minute period and recorded on the test form. For test hole A1, water was placed in the test hole up to app rencii �tely 6 inches above the gravel and the water drop was recorded at 30-minute intervals for 4-hou 11 period with water replaced al,,-- each interval to approximately 6 inches above the gravel. 6.6 Percolation Test Rate Forms Percolation Test Rate forms signed by the Registered Environmental Health Specialist (RENS) are attached.