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). H. KLEINFELDER & ASSOCIATES <br />• <br />File No. S-1008-35 <br />May 17, 1985 <br />Page 11 <br />on Plate XIV. The total dissolved solids for these three wells varied from 185 to 220 parts <br />per million. 'This compares to the maximum allowable under Title 22 Guidelines of 1,000 <br />parts per million. All other constituents were considerably below maximum allowable levels. <br />Because there is very limited data available on groundwater quality in the eastern <br />portion of the county prior to the late 1940's, it is very difficult to determine long-term <br />overall trends. Since the present 'IDS levels are low and based on published information, it <br />is unlikely that there has been significant increases in any of the minerals for which <br />analyses were made in the past. <br />GENERAL COMMENTS ON PERMFA.BIUTY <br />Based on our field explorations, it appears, that two-thirds of the materials <br />encountered in the test borings consist of cemented clays and silts with in place <br />® <br />permeabilities on the order of 1x10-6 to 1x10-7 cn . /sec. 'These same materials when <br />remolded can have permeabilities as slow as 1x10 -e to 1x10-9 an ./sec. An example is <br />the test result of 3.2x10-3 an./see. on remolded clay from Boring 5 obtained immediately <br />below the landfill. 'The remaining materials consist of cemented silty sand with in-place <br />permeabilities on the order of 1x10-3 an./see. and remolded permeabilities between <br />1x10 -4 to 1x10-' cn . /sec . <br />C <br />WizWNWCORK, <br />1. The conclusions and recommendations in this report are based on the test boring drilled <br />for this study. It is possible that variations in the soil conditions could exist between <br />or beyond the points of exploration or the groundwater elevation may change, both of <br />which may require additional studies, consultation and possible design revisions. <br />2. This report was prepared in accordance with the generally accepted standard of <br />r� <br />