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KENNETH G. OSBORNE &ASSOCIATES <br />April 26, 1988 <br />Lagerof Construction Conpany <br />1607 East Ed inger <br />Santa Ana, California 92705 <br />Ref erence:Interior Sewer Trench Density Tests <br />KIeenline fndustrial Bullding <br />3220 S. Fairvien Street <br />Santa Ana , Calif ornia <br />Dear Hr. Lagerlof : <br />This letter presents the results ofperformed by this f j.rm for the backfill <br />serder trench at the referenced project. <br />density testinS <br />of the interior <br />The <br />depth. <br />trench. <br />interior seuer <br />0ur Eests are <br />trench <br />liEi.ted <br />uas about <br />to the upper <br />three feet <br />1.5 feet of <br />in <br />the <br />' The density of the soil vas deternined in accordance <br />vith A.S.T.M. Test MeEhod D-2937. The results Here conpared <br />to the naxinum density as deterEined in accordance vith <br />A.S.T.M. Test l,lethod D-1557. The results are presented on <br />the attached "Tab1e of Test Resultsrr vith the approxinate <br />test locatr.ons shovn on the attached plot p1an. <br />The results of Eesting indicaEe that the above <br />referenced backfill have been conpacted to at least 90 <br />percent of naxlnum density. <br />--.-.-.-\Respec Af'u11y cu\it ted, <br />\ <br />KENNETH G, OSBORNE\& ASSOCIATES <br />YGM:ed <br />Job No. 4871 <br />GEOTECHN ICAL ENGIN EERING 17141 MURPHY AVENU E <br />G. 0sbor <br />IRVINE, CALIFORN IA 92714 (7141471-2001 <br />Kennet <br />G.E. 6 <br />Attention: Mr. Lagerlof <br />J-./ <br />-1?rzr.+ <br />Alll <br />I <br />I <br />I <br />i <br />I <br />ir