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HomeMy WebLinkAboutTract Map 3883 Lot 153 Field Density Testing . REPORT of OBSERVATION and FIELD DENSITY TESTING for RESIDENTIAL GRADING Lot 153; TR 3883 APN: 919-131-005 Temecula, California LD01-069GR July 24, 2001 Prepared for: Mr. & Mrs. Tim Hilt 41308 Yuba Court Temecula, CA 92590 (909) 676-2979 Prepared by: Gunvant Thakkar, P.E. 45712 Classic Way Temecula, California 92592 909/676-7541 . l'il. ~"..,. I-\t), \~ \ . . GUNVANT THAKKAR, PROFESSIONAL ENGINEER 45712 Classic Way, Temecula, California 92592 909)676-7541 July 24, 2001 Mr. :&.Mrs. Tim Hilt 41308 Yuba Court Temecula, CA 92590 (909) 676-2979 Project: Compaction Testing Lot 153; TR 3883 APN: 919-131-005 Temecula, California Dear Mr. and Mrs. Hilt: In accordance with your request, we have prepared this compaction report for the subject property. The report represents a summary of the observations and compaction testing of the fill placed on the proposed grading pad. Field testing and observations indicate the compaction and grading of the soil was performed properly. The soil should perform satisfactorily for the expected usage. The included findings and recommendations have been derived in accordance with generally accepted professional principles and practices in the fields of soil mechanics and foundation engineering. This warranty is in lieu of all other warranties, either expressed or implied. Z- . . INTRODUCTION '\.-1 In accordance with your request, tests have been performed on the fill placed on the rough graded residential pad. The excavation, fill placement, compaction and testing associated with this phase of tlile grading was performed from May 30 through June 28, 2001. This report presents a summary of the testing services provided. PROJECT DESCRIPTION The site will have a single family residence with attached garage constructed on it with associated landscaping and access drive. This structure could consist of a one or two story, wood framed residence founded on a continuous perimeter footings foundation system. GRADING PROCEDURES The observations and test results indicated that the grading was performed in the method consistent with the U.B.C. as amended by Ordinance 457. All areas to receive fill were stripped and cleared of vegetation and soft soil prior to placement of soil fill. Keying and benching into natural ground was completed in general compliance with the Uniform Building Code, Appendix Chapter 33. The minimum acceptable degree of compaction was 90 percent of the maximum density. FIELD DENSITY TESTING Field density testing was performed in accordance with ASTM D1556-64 (Sand Cone Method). The results of the field density tests are presented in Table I of this report. The approximate location of the tests are shown on the Plot Plan, Plate 1. MAXIMUM DENSITY DETERMINATIONS Maximum density 1 optimum moisture determinations were made from representative samples of on-site soils used in the fill operations. The tests were performed in accordance with ASTM D1557- 78 Method. -3 . . LIMITATIONS The findings and recommendations of this report were prepared in accordance with contemporary principles and practices in the field of geotechnical engineering. No other warranty or guarantee is either. expressed or implied. Only a portion of the subsurface soils and conditions were evaluated or observed and the conclusions are based upon an interpretation of the soils conditions encountered in the field tests. Conclusions are also based on the assumption that these findings do not vary appreciably in the adjacent areas. However, minor variations may occur: should soil conditions significantly different be encountered in the future, an assessment of the impact on subsequent recommendations should be made. All future grading and fill placement should be performed under the inspection and testing of a registered civil engineer. SUMMARY Our description of grading and backfill operations, as well as testing services, were limited to those grading operations performed from May 30 through June 28, 2001. The conclusions and recommendations contained herein have been based upon our observation and testing as noted. To the best of my knowledge, the work within my area of responsibility is in accordance with applicable provisions of U.B.C. as amended by Ordinance 457. Due to periodic site inspections and testing, footing excavations should be inspected by a registered civil!engineer prior to concrete placement to verify proper embedment entirely into competent soils. REGOMMENDA TIONS 1. A minimum of three-feet over-excavation has been performed five feet outside proposed building limits to ensure a uniform blanket of a minimum of 90 percent compaction under structures. 2. A safe allowable bearing value for foundations embedded a minimum of 12" below lowest adjacent grade into competent ground is 1,500 psf. Continuous footings should have a minimum width of 12 inches. The isolated column footings should have a minimum embedment of 18 inches below lowest soil grade. 3. Allcancrete slabs an grade shauld be 4" thick. They shauld be underlain by 3" .of sand .or gravel. Areas that are to be carpeted or tiled, or where the intrusion of moisture is objectionable, should be underlain by 6 mil visqueen properly protected from puncture with an additional 1 " of sand over it. This arrangement of materials wauld result in a profile downward .of cancrete, 1" of sand, 6 mil visqueen, 3" .of sand and subgrade sail. Cantractars shauld be advised that, when pouring during hot or windy weather conditions, they should provide large slabs with sufficiently deep weakened plane joints ta inhibit the development of unsightly and irregular cracks. A... . . 4. All faatings far single story canstruction shall be a minimum of 12" in width and 12" in depth, measured below the lowest adjacent campacted or firm grade. For two story construction, the faatings shall be a minimum .of 15" in width and 18" in depth. All foatings shall incorporate a minimum .of one # 4 bar running cantinuausly through the foatings. The bars shall be lapped a minimum .of 30 bar diameters and shall be placed appraximately 3" from the battom. All footings shall be extended ta a depth sufficient ta provide a minimum setback from the battam of the footings to the daylight in any adjacent slope in accardance with U.B.C. 5. "'5 . . GUNVANT THAKKAR, PROFESSIONAL ENGINEER 45712 Classic Way, Temecula, California 92592 (909) 676-7541 Mr. & Mrs. Tim Hilt Maximum Density Optimum Maisture Cantent (pcf) (%) 130.5 9.0 Eleva- Tion (Feet) Max. Dry Density (pcf) Water Content (%) Dry Density (pcf) Relative Method Com pac- tian (%) 1. 63 130.5 9.5 120.1 92 SC 2. 61 130.5 9.2 118.8 91 SC 3. 62 130.5 9.8 120.1 92 SC 4. 63 130.5 9.5 117.5 90 SC 5. 65 130.5 9.1 120.1 92 SC 6. 66 130.5 8.9 121.4 93 SC 7. 66 130.5 9.2 120.1 92 SC 8. 71 130.5 9.8 117.5 90 SC 9. 70 130.5 10.0 117.5 90 SC 10. 74 130.5 10.1 118.8 91 SC 11. 79 130.5 9.8 121.4 93 SC 12. 81 130.5 9.9 120.1 92 SC 13. 85 130.5 9.5 118.8 91 SC 14. 89 130.5 9.2 117.5 90 SC 15. 92 130.5 9.8 120.1 92 SC 16. 92 130.5 9.9 118.8 91 SC 17. 92 130.5 9.8 120.1 92 SC ~ . . \ \ cI/Yd'CI ~ :s>-' \ ~" J>' .' ~k. . !~. >J&."". .1>8 ..">e \ , ~/ I '" I I I I I ,Ill "- ~\p. ''" " Ii:: I I I '<', , j \ 1(. ~t -- .... . ,. f.~ '. / I , LEGEND . APPROXIMATE TEST LOCATION DATE TEST LOCATION PLAN 1 . ~ . . . ~ ~ q., ~ (>'//1 -- <: ~ <:::: <;(" ,'<::. ~ -l... "- '-oJ <t ~ \.., l-...: <: \J ~ '\) ~~ 'oJ ~ \) \; t,-, <: ~'- QC'v'I 't ~ . '(/0' B.Y.N/( If' ~ -- - . DATE SITE LOCATION PLAN PLATE 2 ~ '"