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Black Oak Estates <br />Page No. 3 <br />On some of the lots it may be desirable to shorten the length of the leach lines in order to <br />accommodate a particular house/lot geometry. By adding a second 1200 gallon septic tank in <br />tandem with the first tank then a significant reduction of suspended solids will be achieved. Due <br />to this reduction the absorption rates of the leach lines should increase. Consequently it is <br />proposed that the recommended leach line requirements be reduced by 25%. <br />It also may be necessary to include a lift station in the design if the proposed house <br />geometry or the system layout is not able to obtain the required gravity drainage. <br />Due to the 1.0 acre size of the subject lots it is proposed that a duel leach field and dry <br />well system be installed with valves located at the septic tank capable of switching between the <br />fields. <br />The attached drawing shows requirements and details for proposed septic systems for the <br />subject development. <br />Very truly yours, <br />NEIL O. ANDERSON & ASSOCIATES, INC. <br />NeilX. Anders , President <br />Geotechnical Engineer No. 2245 <br />Attachment: <br />Engineered Septic System details, Black Oak Estates, one D size drawing <br />