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-05-98 04: 14P i�•Yti• � alb• iV VY Lffa1 /.VO O'1 ,Vii •1LLr 11iLWLlI 111V �JVVJ' `e, 1CtEtNFfEDER Although there was no apparcnt overcompaction caused by construction equipment,nevertheless, it was stili difficult to drill two feet using power auger equipment. As you are aware, a similar condition existed on the driving tec area where initial percolation tests indicated zero percolation. A test area was prepared by ripping approximately z'/: fect. Percolation retests in this area indicated percolation rates in the 30- to 40-Minutes per inch range. Based on this information, we recortnnend that the proposed farmland disposal area be similarly ripped to loosen the near- surface silt and clay soils. Fill from adjoining farm areas could then be used to raise grade in this area to provide a ;-foot separation between the bottom of a normal leach field. and the groundwater table. We recommend•that relatively-light scraper equipment or other forms of construction equipment be used for this purpose to minimize compaction. Once this process is completed,we recommend that a percolation rate of 60 minutes per inch be used in design- The esignThe attached analytical test results indicate that the upper.gr.ound,%"_mr_in this ama has very_low niiraie concenarraatmns. It is also our opinion that de-nitl`ifiration of any waste would be large considering the clayey and organic nature of the near-surface materials. Although we have not calculated the nitrate loading, we do not believe that this issue will he a concern for the above reasons. Nitrate loading calculations will be provided at a later date. { We trust this letter presents the requested information_ If you have any questions or need additional information. please contact our office. Respectively submitted, KLUNFELDER,INC. Ron Heinen. G.E. Regional ManagerlSenior Principal , RH:md cc: Scott Sullivan Cecil Dillon i . 20.1096,-15,r2019t 096 'Age 2 uf2 Copyright 1998 Klcin!'e:der.Inc, Page 4. 1998