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). H. KLEINFELDER & ASSOCIATES <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 MDS 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 PERMUEUTY <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 /> permeabilities on the order of 1x10-6 to 1x10-7 an./see. 'These same materials when <br /> remolded can have permeabilities as slow as 1x10-8 to 1x10-9 an ./sec. An example is <br /> the test result of 3.2xI0-3 an./sec. 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 1x10-5 an./sec. <br /> LIMITATIONS <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 /> i <br />