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Dillon & Murphy did not yield any unusual contamination concerns. The nitrate test result (Appendix) was 1 .48 mg/L. The DBCP was a "non-detect". As explained in the Surface and Subsurface Report, a review of County Records did not yield any groundwater contaimination concerns. A groundwater test was performed on the well located on the property adjacent to the subject parcel; the address being 10334 E. Woodbridge Road (A.P.N. 017-230-02). The only well on the subject property is an agricultural well. Since the test was done in the winter time, the well was not operational. I spoke with Ray Borges from Environmental Health on May 12, 2004 and he indicated the water sample taken from the adjacent well was sufficient. The water was tested for nitrates and DBCP. The samples were taken by Ed Krager of Dillon & Murphy at the spigot at the well. The well is a standard rotary well for domestic use. The samples were placed in a controlled environment for transport to Precision Enviro- Tech. Custody of samples were relinquished to staff at Precision Enviro-Tech '/2 hour after samples were taken (see chain of custody in Appendix). The nitrates were measured as 1 ,48 mg/L. The DBCP was measured at as non-detect (see Appendix for results). Based on water test results, potential for contamination is low. VI. SOIL PROFILE AND PERCOLATION TESTS Two test holes were excavated to a depth of 3.5 feet. The purpose of the test holes were to determine percolation rates in this area. For approximate location of the test holes, see the Tentative Parcel Map in the Appendix. The holes were prepared in accordance with County Standards. The holes were excavated on February 9, 2004 and filled to a measurement of 30 inches (12 inches above the gravel per County standards) with water for the 24-hour presoak period. On February 10, 2004, at 8:00 a.m. after the presoak period the hole contained no water, and the 4 hour test was preformed in accordance with County standards. The last half hour of the test for this parcel was witnessed by a County health official (Lisa Medina, SR. R.E.H.S.) and the test data is as follows: Test Hole Percolation Rates 1 5.21 min/inch 2 3.10 min/inch (see Appendix for full test data sheet) Based on the percolation data obtained, it is recommended that a standard septic tank and leach lines (including a 12,000 sq/ft piece of land reserved for leach field) shall be sufficient for waste disposal. No pits required. 2 C:10378 SOILS REPORT 020904