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MA�-20-2009 FRI 08�48 AM FAX N0, P. 03 <br /> Panattoni ConstrucHon ES-0892,03 <br /> Maroh 11, 2009 Page 2 <br /> Revised March 17, 2009 <br /> A rep►eaentaNve of ESNW obaerved the polyurethane In�ction process. The polyuretha�e <br /> injection was achfeved�hrough placemer�tof'Ir{ InJectlon probes along the aroa affected by <br /> settlement. The probea were placed elong the outslde of the buildfnp between the northeest <br /> corner oontlnuing to the doonvay at the noRheaet portion of the buildMg. The probes aonelstetl <br /> of eipht foot (ong sectlona oi one_half inch copper tubing, and were "started' by drlllinp pibt <br /> hohs to a depth of epproximately iwo feat below ezleting grade, The injection tubes were <br /> driven ta approximataly efpht feet at en angla which would allow tor Injection mater(al beneath <br /> the footing. <br /> 7he injeotion oontraator pumped approxlmataly 200 pounds of polyurethane foem into each <br /> eeparete InJection probe. The wntractor reportedly obaerved several "bumps" indlcative of the <br /> ■ubJect butld(ng foundefion and tilt-up panel being `IiRed". ESNIN observed the InjecNon <br /> prooess for all 14 locatione. The contrador indicaMd the foam expandz upon inJectlon and hec <br /> e unk weight of approximately iour pounde per cubic foot (pc� when fully expended. Based on <br /> a totel InJected weight of 2,800 pounds, approximately 700 cubic feet of expanded foam w�e <br /> plsced benealh the fooGnp. Aiter oompiet(on of the Injeation procesa, the wall panels were ro- <br /> �et and re-grouted. <br /> If you have quesdons, or If add(tlonal intormation is required, piease aall. <br /> Sincerely, <br /> EARTH SOLUTIONs NW, LLC ,�����w,�sMj°9�. <br /> ��°` ,. ��'�o << <br /> � �:.� � <br /> � > � <br /> roN�L�3l17101 <br /> 5tephen H. Avrii Kyle R. Campbell, P.E. <br /> � � Staff Oeologist Princfpal <br /> [aAh 6olYliont NW.LLC „/2 <br /> ,�/> <br />