Laserfiche WebLink
1, 11. K[I IN I I I [R� & AY�(W I I I File No. S-2008-1 <br /> June 27 , 1973 <br /> PAGE TWO <br /> drilling and our examination of the soil samples , it does <br /> not appear that this water represents a static groundwater <br /> level. It is very likely, .however, that this perched water <br /> will exist while the fields north of this property are <br /> under irrigation. <br /> We understand from Mr. Gama that an equivalent fluid <br /> pressure of 36 pounds per cubic foot has been assumed in <br /> design of the pumping station walls . It is our opinion that <br /> this equivalent fluid pressure is appropriate, assuming that <br /> an open excavation will be made and that sandy backfill will <br /> be placed adjacent to the walls of the sunip. <br /> It appears from Test Boring 5 that water will be <br /> encountered during excavation for the Eumpino facility near <br /> Lots 113 and 114 . Based on the availa le da0ta , we anticipate <br /> that the flow of water can be handled during construcLion by <br /> a sump and pump system. However, we recommend that you <br /> consider installing permanent drains to relieve hydrostatic <br /> pressure on the walls of the pumping station., <br /> The subsurface data collected to date does not indicate <br /> a perched water condition near the pumping station south <br /> of the East Bay Municipal Utility District easement . <br /> Our laboratory testing, and preparation* of recommendations <br /> for site preparation and grading, foundations , floor slabs , <br /> and other data for the proposed subdivision are in progress . <br /> We will transmit the results of this information as soon as <br /> it is available. <br /> If you have any questions regarding this letter, please <br /> contact us . <br /> Respectfully submitted, <br /> J. H. KLEINFELDER AND ASSOCIATES <br /> Richard M. Wary <br /> RMW:pjr <br /> Attachments (4) <br /> cc wl Attchs . : Schmid Development, Inc . (3) <br /> Attention : Mr. Lew Schmid <br /> Schmid Development, Inc. <br /> Attention: Mr. Mike Mensinger <br /> Marshall Dunlap, C . E. <br />