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4804 - Patiners Creek <br />April 17, 1984 <br />Page 4 <br />ILot 10 - (Sites 17A, 17B, 10A (4/11/84) and 10B (4/11/84)) <br />- This lot was retested since the original sites were located in a low <br />drainage area - --� <br />- The new sites are located on slopes of out 109 <br />- Perc rates averaged 11 MPI primary s e, 13 MPI alternate site <br />Seasonal saturation zones at 44-50" a rima;y_site would allow shallow <br />trenches if a curtain drain is used to lower the seasonal water table. <br />The alternate site should support a standard trench system. The propose <br />house location near the southeast lot corner may not be feasible and a <br />lift pump might ultimately be required for this site <br />SUMMARY <br />All ten proposed lots have sites which appear suitable for septic systems. <br />On Lots 1-7, the drainfield site locations place some limitations on usable <br />house sites. I recommend that house site "envelopes" be incorporated into <br />the plat to help preserve the tested drainfield sites. Curtain drains <br />may be of some benefit to certain sites and allow the use of shallow trench <br />drainfields rather than mound systems. <br />Based on the information submitted, I recommend approval of this PRD. The <br />developers should be notified it is their responsibility to keep all traffic, <br />qrading, fill, etc. away from the tested sites. <br />