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Allestad <br /> June 18, 1990 <br /> Discharge from ro�f drains and other site drains should be <br /> tiqhtlined to the storm drain system. A ;ermanent perimeter <br /> drain, independent of the roof drain system, should be <br /> placed below the exterior foundations of the structure. The <br /> perimeter drain should colaced inf at 1 a t onehcubic�foot <br /> perforate3 PVC drain pipe p <br /> of dra�n gravel per lineal foot along the base of the wall. <br /> Erosion Control <br /> The onsite sand soils will be erodable when exposed on slope <br /> surfaces. Surface drai�age should be directed away from <br /> slopes and collected in area drains for discharge to the <br /> storm drain system. All existing and new slopes should be <br /> planted immediately with grass and deep rooted plants to <br /> help reduce erosion potential. If excavated materials are <br /> placed on the lower southwestern area pf the property the <br /> fill surface should be planted immedia+.ely to reduce erosion <br /> potential. <br /> Plan Review <br /> This report .:�s been prepared to aid in the eval.uation of <br /> this site and to assist the architect, structural and civil <br /> engineers in the design and construction of. the project. It <br /> is recommended that this office be provided the opportunity <br /> to rev+iew the final desigr. drawings and specifications to <br /> determine if the recommend.ations of this report have been <br /> properly implemented and to make any supplemental design <br /> r��commendations which may l�e required. <br /> Observation� and Testing During Construction <br /> Foundation recommendations given �n this report are based on <br /> the assumption that all foundations will be placed on <br /> undisturbed recommended bearing material. All footing <br /> excavations should be observed prior to placement of steel <br /> and concrete to se� that footings are founded on <br /> satisfactory bearing materials and that excavations are free <br /> of loose and disturbed r.ia+erials. All structural fill and <br /> backfill areas should be observed by a representative of <br /> this office after stripping and prior to placing fill. <br /> Proper fill placement and compaction should be verified with <br /> field and laboratory density testing by a qualified testing <br /> laboratory. <br /> Page No. 9 <br /> PL'�ject No. 90-122-01 <br />