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Ei7-13-1993 1?�33PM FROM CRONIN HOMES, INC. TO 25988`6 ?.03 <br />. . _ � -� <br />` Crest Engineeri.ng Incorr.oratcG • <br />P.O. Boz ?76 , <br />, 800 Peaxle Jensen Stay <br />LaConnec� WA 9825T <br />(206)�66-1006 Fax (206) 466-J.310 <br />Novembec 2�, 1992 <br />Bill Lanqus <br />Czonin Nomes, Inc. <br />713 36 8ve�ett 11a7.1 Wy., Ste. C <br />Svf;ett; W11 98208 <br />RSe GSOT6CFRiICAi. INVESTIGATION OF GOTS 11, 12� AND 13, MT. VIfiif !7 <br />SUBUIVISION, EVERBT'f, WA. <br />Rhis.lettei ia wzitten puzsuant to your request foz a site lavestigation of <br />the th�ee subject lnts teqat8inq the bearing capacity of the soils. <br />On the date of this letter, I perfoimed penettometec tests at 1-foot (depth) <br />intervals to a total depth of eiqht feet in Eouc sepacate test holes as shown <br />on the acCompanyinq plat map. The test hales rrere duq by a atanCazd size <br />COnstLactien bnckhoe. <br />The area in qu!stion !s apparently a fill area. The fill has been in place for <br />repostedly epptozimately thirty yeazs (per Bert Cronin 11/92). 1111 four holes <br />demnosttatad approximately the snpx soil pzofile, which xould indicate that � <br />the fill is uniform anG hosogeneous throughout the acea of the th�ee lota in ;i <br />pueation. The aoil profile showed a one to tvo foot layec of dazk biom .� <br />topeoil (sandy loan), and below that, a gzey loamy sand, vtth co6�les and <br />pabDlor. Dua to the largQly granulac natare of the soil, I vould eanaidez it�s � <br />conposition vcry good Eot suppocting typical house loads. ,, <br />The teaults of the genetzo�xter suzvey aze as follarrs: <br />0- 6': Typlcal allowable bearing pressute oE approximetely 2,000 - 2,500 <br />pounda per squaze foot (psf). <br />6' - 8': Typical allowable beazing pressure of appcoximately 1,000 - 1,500 <br />p:f. <br />Continuous footinqs foz standard two story constzuction should not exett lonq <br />tetA loads oE qceatec than 1�500 psf an the soils lmmediately heneath the <br />tovtings� as lcnq as the footings ace at least 16-inches wia� at theit base. <br />It is my undetstandinQ that Czonin Nao�a� Inc. uses 16" wide Eootinqs as <br />atandatd pLactice. Due ta the di6tzibution af the applied load over a large <br />atea rith incceasinq soil depth� the ptessuce on the soll six feet oc gteater <br />Gelo� the footings will be far leas than 1,000 psf. <br />ReqatQing enticipeted settlement, the uppec six :eet of soil shouid not settle <br />any dpnreciable amoupt, it appeacs to have been pceviously properly compacte4. <br />The lowez coil horizuns �y expecience a vezy small amou�t of settleatent due <br />to the Lnczeasr.d lueel, l�uwevr.c il is not anticipated to be detrimental becau�e <br />oE the relatively smali load inceease, uhifcrmity cf the material <br />