1001 39TH ST 2016-01-01 MF Import

i� � — DAVID L. NELSON AND ASSOCIATES INC. - Consulting Engincering Geology Nov=mber 27, 1991 Proje. '• No. 10591 Page 11 thickness of 12 inches. The remaining two feet should be backfilled with low permeability on-site soils. A perforated drain pipe should be embedded in the drainage blanket alcrng the base of the wall. The pipe should be set such that a positive drainage gradient is established and access to an outlet provided. The use of ADS flexible type drain pipe is not recommended for greater than 4 foot embedment dApths or where excavation and replacement type maintenance are not desired. USE OF THIS REPORT AND WARRANTSC We have prepared this report for use by Bert E. Larsson Construction, Inc. and their agents for their use in planning and preliminary design of a portion of this project. The data and report should be provided to prospective contractors for their bidding and estimating purposes, but o�r report conclusions and interpretations should not be construed as a warranty of subgrade conditions. The scope of our work does not include services related to construction safety precautions, and our recommendations are not intended to direct the contraator' s methods, techniques, sequences or procedures, except as specifically described in our report for consideratic�n in design. There are possible variations in subsurface conditions. Within the limitations of scope, schedule and Dudget for our work, we warrant that our work has been done in accordance with generally accepted practices followed in this area at the time the repo:-t was prepared. No other warranty, expressed or impiied, is made. If there are any questions concerning this repo:rt o�� if we can provide additional services, please call . Sincerely, DAV . NELSON & ASSOCIATES, INC. �� .i!��—____ ws p. �oL ; David L. Nelson, PG �4.�pfWAsy��G� � Professional Engineering Geologist � �a �. /�'��,a -�y� � � 7 N � / �� - ��Gdt �, .a�, �as o :� � ��9 arles P. Couvrette, PE � C� Af• w Geotechnical Engineering Consultant sS�oNn�E��r DLN:CPC:kmn ' EXPIRES � 7 � � � �l�D i� �_��"�'�'s' _. . . . . . .,.