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r f <br /> F ' transported via automobile to Precision Environ-Tech and released to thems <br /> ( ee <br /> chain of custody in Appendix). The nitrates were measured at 8.62 mg/l. The <br /> DBCP was measured as non-detect (see Appendix for results). Based on water <br /> testing, potential for <br /> p contamination is very low. <br /> V1. SOIL PROFILE AND PERCOLATION TESTS <br /> One test hole was excavated to a depth of 3.5 feet in the area of the <br /> y homesite. The purpose of the test hole was to determine percolation rates in this <br /> area. For approximate location of the test hole, see the Tentative Parcel Map in the <br /> Appendix. The hole was prepared in accordance with County Standards. The hole <br /> was excavated on November 4, 2003 and filled to a measuringof 30 inches 1 " (6,- '� <br /> 2 <br /> inches above the gravel with water for the 24-hour presoak period. On <br />+ November 5, 2003, at 8:00 a.m. after the presoak period the hole contained no <br /> water, and the 4 hour test was performed in accordance with County standards. <br /> Soils lithology in the general area of the test holes consisted of a loam. As a <br /> shallow percolation test proved adequate for a conventional septic system, no <br /> further soil exploration was necessary. <br /> A copy of the Soils Classification Map prepared by the U.S. Department of <br /> Ag Soil Conversation Service is included in the Appendices. Their map classified <br /> the soils as Columbia fine sandy loam. Due to the classification, there should be no <br /> potential problems or special engineering required on future septic systems. <br /> One percolation test was performed in a hole with 8 inch in diameter by 42 <br /> Inches deep backfilled with 2 inches of gravel. The one hole was filled with water <br /> 24 hours prior to running the test. The test hole for Parcel 1 was performed under <br /> i l a 4 hour test. The last half hour of the test reading for Parcel 1 was witnessed by <br /> a County Health Official and the test data obtained is enclosed in the Appendix. <br /> I <br /> Parcel Number Percolation Rate <br /> 4 <br />' 1 15.00 minutes/inch <br /> VII. GROUNDWATER <br /> A Groundwater test was performed on the water faucet located by the office <br /> building on the adjacent property (A.P.N. 091-350-04). The well was tested for <br /> nitrates and DBCP. The samples were taken by Mike Toy of Dillon & Murphy and <br /> driven directly to Precision Environ-Tech. Water was taken from the faucet at the <br /> ty <br /> 2 <br /> i . <br /> C:10210717921 N. Podesta Lane SOILS REPORT 110503 <br />