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Home My WebLink AboutCT 82-05A; Telescope Point; Soils Report; 1984-05-18- F WI c/+-J- c-r BZ-sfj c-l- -Id-15 FINAL COMPACTION AND GRADING REPORT FOR LOTS%-5, 56-65, 117-139, FOR RESIDENTIAL DEVELOPMENT: PORTION OF TRACT 86-5; "TELESCOPE POINT" PROJECT IN CARLSBAD, CALIFORNIA CONDUCTED FOR: WESTANA BUILDERS/DEVELOPERS 4241 JUTLAND DRIVE, #25 ,SAN DIEGO, CALIFORNIA 92117 W.O. 407004 MAY 18. 1984 e-L-a IYIY GEOTECHNICAL ~:c~~-Y~ -TN. 5 _ . ..&J~..c, ..-r,~:A_.N ~-,~..::~+k-,-‘-iiuCiT: P’ 1984 W.O. 407004 Y-' kia Builders/Developers '.~utland Drive, $25 'Diego, California 92117 Subject: Final Compaction and Grading Report for Lots l-5, 56-65, 117-139, for Residential Development; Portion of Tract 86-5; "Telescope Point" Project in Carlsbad, Californ .,rwarded herewith is the Compaction Report on the above referenced kroject. The results of the compaction tests are shown on Table I. kocations of the tests are shown on the accompanying plot plan. Laboratory Standard: (ASTM:D-1557-70) 4 inch dia. mold; l/30 cu.ft.vol.; 5 layers - 25 blows per layer 10 lb. hammer dropped 18 inches Classification Optimum 'Moisture Z Max. Dry Density Lbs./Cu. Ft. VI XII xxv SAND, silty, BROWN SAND, RED/BROWN SAND, clayey, silty SAND, silty, clayey, TAN CLAY, silty, BROWN/ BLACK SAND, clayey, WRITE/ TAN SAND, BLACK CLAYSTONE, LIGHT BROWN 10.5 10.5 11.0 12.0 16.0 ~11.5 16.5 14.0 124.5 125.0 125.0 119.5 113.0 124.0 108.0 117.0 The grading operation was conducted from February 21, 1984 through April 9, 1984. Supervision was provided during this period. 1630-C South Sunkist St., Anaheim, CA 92806 (714) 6342092 ,ia ior to the placement of fill soils,- all vegetation and debris was ioved from the site. The existing loose surficial soils were cavated to competent material. The exposed surface was scarified, isture conditioned and recompacted to ninety (90%) percent of the boratory Standard. /. e fill soils were placed in six (6") inch lifts, moisture conditioned d compacted in a like manner. key was constructed at the toe of the~fill slopes to provide support r the fill. The existing slopes were properly benched during nstruction. me native soil classifies as SANDSTONE, and is suitable for the support I: of the fill and the proposed structures. e c Compaction was obtained by 633 Scrapers, 824 Rubber Tire Dozer. A water truck was used for moisture control. 'Ihe relative compaction percent was determined by the Sand Cone Method (ASTM:D-1556-70). These tests were taken a minimum of every 500 cubic yards placed and every two (2') feet in depth of fill placed. Expansion indexes were determined in accordance with Section 29 of the U.B.C. 1978 edition. Results are as follows: Lot Expansion Expansion No. 's 'Index Potential l-5 23 Low 56-65 20 Low 120-121 20 Low ' 122-132 28 Low 132-139 30 Low Froposed structures shall be supported by isolated and continuous ead footings placed a minimum depth of twelve (12") inches below P est ,adjacent finish grade utilizing a recommended safe bearing ze of 2600 pounds per square foot and 2100 pounds per square foot, ; ectively. This value is for dead plus live load and may be raased by one-third (l/3) for total including seismic and wind ds where allowed by code. Increases in bearing capacity for B‘ me-eases in footing dimensions are tabulated below: Minimum Minimum Bearing Depth Width 'Value (inches) (inches) (psf) Increase Depth Width (psf/ft)(psf/ft) Maximum rs, !Continuous 12 12 2100 314 109 4100 'Isolated 12 12 2600 314 105 4200 Footings which span from native material to compacted fill shall be --reinforced with a minimum of one (1) 05 bar top and bottom to control potential differential movement. Reinforcing bars shall extend a i minimum of ten (10') feet on either side of transition line. L f '~ I. I., Footings placed on or adjacent to slope's shall have a minimum horizontal distance of five (5') feet from the edge of the footings to the face of the slope. Footings should not be poured until authorization to do so has been obtained from the Building Inspector. Excavations may be made and forms set before approval of the report at the owner's risk. I hereby certify that the subject grading was supervised by me and the work was done in full compliance with the Grading Ordinance of the City of Carlsbad and in accordance with best accept.ed practices and the applicable chapter of the U.B.C. REGULATORY'COMPLIANCE All cuts, fills or processing of original ground under the purview of this report have been completed under the inspection of and with selective testing by ACTION GEOTECHNICAL CONSULTANTS, and found to 'in compliance with the Grading Code of the City of Carlsbad. The spleted work has been reviewed and is considered adequate for the Ielopment now planned. Our findings were made and recommendations k repared in accordance with generally accepted professional engineer b,ctices, and no further warranty is implied nor made. r his report is subject to review by the controlling authorities for lhis project. e appreciate this opportunity to be of service to you. TRespectfully submitted: iACTION GEOTECHNICAL CONSULTANTS BRUCE A. PACKARD RCE 13801 VICE PRESIDENT - ENGINEERING STAFF GEOLOGIST' TH:ss .- - - - - - .- .- - - i ! : i :/ ;I4 ,:: 1 i,, / 1 I ; ! ,/ : 14, i EEA $4-w &VP WO”” OIDE”: 4-a 706)/ 11 I LOCATIQli OF COMPACTION TESTS I ' X = COMPACTION TEST PREPARED FOR /ld t57m4h E:F . . . a’,, ..yN 5 ‘” ;.L,. T,, A:;,N ,:mj TABLE I ACTICIN w-o. 4oii?@f ENGINEERING ~COIISUVA- m TABLE I c DATE OF TEST a -GY-89 #2&kw ‘f I# ‘f za7d?u/ 3-/-83/ * $-f-lW If f/ 3-/6-&?q If //-ACTION W.O.@7Dl9v LLL/ ENGINEERING c E-CONSUY-~ TEST NO. LOCATION DEPTH OF TESTS BELOW FINISH GRADE (FT.) MOISTURE (PERCENT) 60 619 ENGlNEERING -c-nm DRY UNIT WEIGHT (LBSJCU. FT.) //SO //x //m 0 //f. //$O /Y&-.0 -.-..A29 //7 0 /I!!/ //CL //6.0 //54 /I70 //to /!G 8 I 91 TABLE I w.0. qo7oM DRY UNIT WEIGHT TABLE I w.o. $297~ BELOW FINISH : ACTION LLL/ ENGINEERING I RELATIVE DATE OF COMPACTION TEST 93 49-8f ?/ 0 73 II 90 II 90 II 9/ II 9’0 ‘t 95 I8 I TABLE I w.“. 407ooy - - -. - - - - -. - ENGINEERING OtEt-C-TAMS June 22, 1984 W.O. 407004-A Westma Builders and Developers 4241 Jutland Drive, Suite 215 %I Diego, California 92117 Subject: Addendm to Grading Inspection and Compaction Report, Dated May 18, 1984, Work Order Nnrber 407004 Gentlemen: At your request, we have reviewed the Cuqaction Report for the referenced project. tit lots 6,7,8, were inadvertently left out of the Campaction Report. These lots shawed adequate ccmpsction, and low expansion potential. Footing recamzndations made in the referenced Compaction F&port remain valid. We appreciate this opportmity to be of service to you. Respectfully subitted: s;72m SCAFFGEOILmsT BFUICE A. PACKARD RCE 13801 VICE PRESIDENT - m- - n-I:sim - 1630-G South Sunk&it St.. Anaheim. Ca. 92606 (213) 652-4710 (714) 634.2092