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[5] Continued. <br /> A Nitrate test was performed on an irrigation well in the closest <br /> proximity to the subject site on 4/7/92 . This well is located 1400 <br /> feet directly south of the subject property. There is a pressure <br /> tank adjoining the well and the sample was taken from the bibb <br /> exiting this pressure tank. The sample was taken after allowing <br /> the tank to deplete its water supply and recharge twice. It was <br /> not possible to measure the static water level depth in this well <br /> since the observation tube was closed off. <br /> The analytical results from this well water can be found in the <br /> Appendix and indicate a low level of nitrate (NO3) concentration <br /> at 13 . 0 ppm. This analysis indicates that there has been little <br /> impact upon the groundwater under the area of the subject property <br /> from agricultural practices, or surrounding septic systems. It is <br /> recommended that a complete California Code of Regulations, Title <br /> 22 water quality study be performed on either the closest domestic <br /> well, or preferably a drilled test well that will service the <br /> proposed Church. <br /> [6] SOIL PROFILE AND PERCOLATION TESTING <br /> An exploratory boring was performed on the north adjacent parcel <br /> to a depth of 25 feet to classify the subsurface soil structures. <br /> Soil types encountered included a black, heavy organic clay surface <br /> soil, above sands and silty sands. A medium coarse sand was <br /> encountered at eight feet and continued down to boring termination <br /> at 25 feet. <br /> The percolation tests conducted by Quality Control Inspection, Inc. <br /> were performed in accordance with the San Joaquin Environmental <br /> Health Department regulations. Our testing procedure was conducted <br /> on 4/6/92 . The field percolation test data reports can be found <br /> in the Appendix. <br /> 4 <br /> , �� �uality ((Dontml Inspection <br />