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James A. Abbott <br /> STS Project 96588 <br /> Au�ust 27, 1996 ►�l` <br /> Page 2 <br /> The City of Orono requires a vertical separation of 3 feet between the base of drainfield rock in <br /> an ISTS trench and the upper limit of soil mottling. The results indicate that the separation is not <br /> met in the first drainfield trench based on the soil descriptions from soil boring B-1 and <br /> measurements at probe P-1. The required vertical separation distance is met in the second trench <br /> based on soil descriptions from soil borings B-2 and B-3 and measurements at probes P-2 and <br /> P-3. <br /> Thank you for the opportunity to provide ISTS site evaluation services to you. If you have any <br /> questions or require further assistance, please feel free to contact me at 559-1900. <br /> Sincerely, <br /> STS CONSULTANTS, LTD. <br /> ��^ r �,�.,.� <br /> /" �`-`--' ' � • e`-/��/ '��t` ;,`a, <br /> --- , <br /> � `� <br /> Gary J. Rath'�bun, C.P.S.S. <br /> Senior Soil Scientist <br /> Designer I License 112 <br /> GJR/pb <br /> Encs. <br /> C6�88001.DOC <br />