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Home My WebLink About; Laguna Riviera Unit 2 Lots 55-56; Soils Report; 1968-10-28- - - - - - - - - - - WOODWARD -CLYDE 8, ASSOCIATES CONSULTlNG SOIL AND FO”NDATlON ENQlNEERS AND GEOL0GlST.s October 28, 1968 Project No. 66-237-2 Kamar Construction Company 325 Elm Avenue P.O. Box 71 Carlsbad, California 92008 LAGUNA RIVIERA UNIT NO. 2 REGRADING LOTS 55 & 56 CARLSBAD, CALIFORNIA In accordance with the request of Mr. Jerry L. Rombotis of your organization, we have provided soil engineering services in con- junction with the regrading of the subject lots. These set-vices included observation of the grading operation and the testing of fill as placed and compacted. Fill was placed, compacted and tested on lots 55 and 56. Site preparation, compaction and testing for the subject grading were done on October 17, 1968 in accordance with the "Specifica- tions for Controlled Fill" in our letter dated January 10, 1967. As the site grading progressed, the compaction procedures were ob- served and compaction tests were made to determine the relative com- paction of the fill in place. Field observations and compaction test results indicate that the fill has been compacted to 90 percent or more of maximum laboratory density. The results of compaction tests are given on the attached forms. Results of compaction tests taken during previous grading on the subject site have been reported in our report dated September 20, 1968. Laboratory tests to determine moisture-density relationships, maximum dry density, optimum moisture content, grain size distribution, plas- ticity characteristics and strength and swell characteristics were performed on representative samples of the material used for fill. The results of laboratory tests have been re,ported in our report dated September 20, 1968. Laboratory tests indicate that nonexpansive fill was placed within 2 feet of rough grade on all fill lots noted above. 3 - - .Kamar Construction Co. Project No. 66-237-2 October 28, 1968 Page 2 of 3 - - - - - - - - _- - A visual inspection of the subject site at the completion of grading indicates that potentially expansive soil is not evident at finish grade on either lot. Footings for structures placed on nonexpansive undisturbed soil or nonexpansive properly compacted fill nay be designed for a bearing pressure of 2000 pounds per square foot at a depth of 12 inches be- low rough lot grade. Footings should have a minimum width of 12 inches. The elevation of compaction tests shown as finished grade (FG) tests correspond to the elevations shown on the grading plans for Laguna Riviera Unit No. 2, latest revised date October 21, 1968 prepared by Raymond R. Ribal, Civil Engineer. This report covers the fill placed under our observation during the dates specified above. Additional fill placed after these dates, as well as the backfill in utility trenches located within 5 feet of a building and treater than 12 inches deep, or any trench 5 feet or more from a building and in excess of 5 feet in depth, should be compacted under the observation of this office and tested to assure compliance with the earthwork specifications of the project. This office should be contacted at least 24 /hours prior to backfilling operations. Utility service trenches within 5 feet of a building that are perpendicular to the building footings and are less than 12 inches wide and less than 3 feet deep are not subject to this recommendation. Structures that will not tolerate differential settlements (such as foundations, swimming pools, concrete decks, walls, etc.) should not be located within 5 feet of the top of a slope. Footings located closer than 5 feet from the top of the slope should be extended in depth until the outer bottom edge of the footing is 5 feet horizon- tally from the outside face of the slope. The inspections and tests of compaction made during the period of our services on the subject site were in accordance with the local accep- table standards for this period. The conclusions or opinions drawn from the tests and site inspections apply only to our work with re- spect to grading and represent conditions at the date of our final inspection. WTODWARD-CLYDE & ASSOCIATES co,m,,i,,r: SOi! "lid Fowh,iw Fl,CiWC,S "d ~cnio::irlr - Kamar Construction Co. _ Project No. 66-237-2 October 28, 1968 - Page 3 of 3 - .- We will accept no.responsibility for any subsequent changes made to the site by others or by uncontrolled action of water or by failure of others to properly repair damages caused by uncontrolled action of water. - - Louis J. Lee CFM/LJL/mec Attachments - (5) Kamar Construction Co. (2) City of Carlsbad Building Inspection Dept. (2) Security Title Insurance Co. - - - - - - - ,.- -- - - _^ 0 WOODWARD-CLYDE & ASSOCIATES C"W,,l,i#,C soil "rid li,2l,liiltllitlll r‘,,giwm <ill‘, Cridi.,!i~ I * - COMPACTION TEST RESULTS --JOB NAk I’ LAGUNA RIVIERA UNIT NO. 2 JOB NUMBErI 66-237-2 DATESCoVERED October 17, 1968 P/&E 1 OF 1 UBOI(ATORY - DATE nzl RETEST LOc*TIOII ELLVITION :“,‘:x: .K%, DIN*,n .::z:;:, HUIIBCR OF OFTEST * Dll “IT. PCF psr * OI L&Q_ UENI. __- -- --~ --- - UPPER LEVEL hzt. 17 218 219 220 221 - - __ - 56 74.5' 13.0 118.0 122.0 96.7 76.0' 8.1 110.2 122.0 90.4 76.6' 11.7 111.7 122.0 91.5 78.5' 110.2 110.2 122.0 90.4 WOODWRD-CLYDE & ASSOCIATES CO,lS ,,,, ill&- Soil n,,d Fnandotio,, ~riCil,rlrr nnd CndiiCir!F