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Home My WebLink AboutCT 72-20; La Costa Vale Unit 3; Soils Report; 1977-09-23- - - - - PHILIP IiENXlNO BENTON PllsIDmYI. CIWL IWTINlEl BENTON ENGINEERING. INC. APPLIED SOIL MECH*N,Cs - FO”ND*TIONS (1717 CONVOY COURT SAN DIEGO. CALIFORNIA er,,, September 23, 1977 Warmington Development, Inc. 1641 Langley Avenue Irvine, California 92714 Subject: Project No. 77-8-1D Repat on Compacted Filled Grcund Building Nos. 21 to 24., inclusive (-ke&gs~~’ Carlsbad, Califunia Gentlemen: This is to report the results of tests and observations made to inspect the compaction of filled ground placed on the areas for Building Nos. 21 to 24, inclusive, of the subject tract in Carl&d, California. Ccsnpacted filled ground has previously been placed on certain areas of this development during the initial site grading .fcr La Costa Vale Unit No. 3. The results of tests taken during this previous grading period were presented in our repat on Project No. 74-5-2D, dated February 4, 1977. The recent grading was conducted during the period between August 5 and September 13, 1977. The fill ground was placed in accordance with the approved specifications. The grading plan used for the placement of filled ground was prepared by Rick Engineering Company. The approximate locations at which the tests were taken and the final results of all tests taken on the project up to September 13, 1977 are presented on pages T-l to T-6, inclusive, under the “Table of Test Results.” The labcratay determinations of the maximum dry densities and optimum moisture contents of the major fill materials are presented on page L-l, under the “Laboratory Test Results. ” Sane of the maximum dry densities shown in the “Table of Test Results” were combinations of these. The tests were taken during the weekly periods indicated below: Test Number 1, 2 and 3 4 to 35, inclusive 36 to 50, inclusive 51 to 76, inclusive 77 to 119, inclusive 120 to 157, inclusive 158 to 170, inclusive - - - - -~ - - - - - ,- - Project No. 77-B-1D Warmington Development, Inc. -2- September 23, 1977 Expansive sail conditions exist in the upper three feet below finished grade on Lots 21 to 24, inclusive. It is understood that a post-tensioned slab foundation system, specially designed to minimize possible detrimental effects due to the expansive soil conditions, will be used fu support of the proposed buildings. ’ The final results of tests and observations indicate that the compacted filled ground has been placed at 90 percent of the maximum dry density or greater. It has been determined that the fill materials, compacted to 90 percent of the maximum dry density, are adequate to satisfactorily support the proposed buildings. If buildings are placed closer to the exposed slopes than 5 feet inside the top of compacted filled ground slopes, the perimeter footing should be deepened one foot below a 1 l/2 horizontal to 1 vertical line projected outward and downward from a point 5 feet haizontally inside the top of compacted filled ground slopes. A plan showing the approximate areas and depths of filled ground placed under our inspection in accordance with the approved specifications will be .submitted with our final repat on this project. Respectfully submitted, BENTON ENGINEERING, INC. BY #?L?& R.C. Remer Distr: (2) Addressee (2) Addressee, Ccslslxrd (1) City of Carl&ad, Building Department (1) Rick Engineering Company, San Diego llLNlON ENGINEERING. INC. T-l - - - - - - - - - - - - - Project No. 77-8-1D Warmingtan Development, Inc. TABLE OF TEST RESULTS Test No. 1 Approx- imate Location Bldg. No 22 2 24 3 26 4 10 5 9 6 18 7 17 8 19 9 18 10 16 11 8 12 9 13 24 14 26 15 68 16 66 17 64 18 19 20 21 22 23 24 25 26 27 68 68 47 151 147 146 148 150 147 145 Depth of Fill Field at Test Moisture in Feet 56 dry wt Compacted 13.0 Original Ground Canpacted 8.3 Original Ground Compacted 16.2 Original Ground 2.0 16.3 2.0 14.6 1.0 18.0 1.0 19.6 1.0 18.1 5.0 20.2 2.0 20.0 2.0 24.1 2.0 15.0 Compacted 18.1 Original Ground Compacted 17.9 Original Ground 1.0 21.7 Compacted 22.6 Original Ground Ccmpacted 18.9 Original Ground 3.0 22.3 5.0 23.3 Ccmpacted 17.9 Original Ground 2.0 15.4 1.0 18.5 2.0 13.9 2.0 15.2 2.0 15.2 5.0 17.1 3.0 18.3 Dry Maximum Dry Density Density Percent Ib/cu ft lb/‘cu ft Ccmpaction Remarks 110.6 121.6 91.0 105.0 118.6 97.5 118.6 116.6 128.0 92.8 118.6 102.5 113.1 107.4 114.8 107.8 114.8 105.7 114.8 105.4 114.8 97.3 107.2 116.4 128.0 106.9 118.6 107.0 118.6 97.4 107.2 98.4 107.5 88.5 82.2 91.1 78.2 90.6 93.6 93.9 92.9 91.8 90.8 91.0 90.1 90.2 91.0 91.5 Rewaked Reworked . Reworked Ck on 85 Ck on #2 Ck on #3 101.0’ 110.9 91.1 99.0 109.2 90.7 97.0 107.5 90.2 102.3 111.2 92.0 106.3 117.9 90.2 103.6 112.9 91.8 121.3 128.0 94.8 111.0 117.8 94.2 110.4 117.8 93.7 102.5 113.0 90.7 99.0 108.8 91.0 *Indicates finished grade BLNTON ENGINLC”INO. INC. Project No. 77-8-1D Warmington Development, Inc. T-2 ,~ - - - - - - - - - - - - - Test No. Approx- Depth imate of Fill Location at Test Bldg. No. in Feet 28 29 30 31 32 33 1.0 34 8.0 35 1.0 36 1.0 37 3.0 38 2.0 39 1.0 40 7.0 41 1.0 42 2.0 43 2.0 44 3.0 45 3.0 46 4.0 47 2.0 48 2.0 49 5.0 50 2.0 51 4.0* 52 4.0* 53 10.0* 54 7.5* 55 6.5* 56 8.0* 57 6.0* 58 4.5" 59 1.0* 60 1.0 61 5.0 62 7.0 63 5.0 64 2.0 65 4.0 66 6.0 67 7.0 68 7.0 69 2.0 *Indicates finished grade 139 144 139 144 Dorado PI. 107 144 105 136 136 135 134 136 74 80 77 73 75 76 12 11 74 78 151 1.50 144 145 146 147 148 149 143 138 139 139 19 46 79 77 75 73 82 1.0 13.7 109.7 117.8 93.0 4.0 16.4 104.0 114.8 90.5 3.0 15.0 99.6 107.2 92.9 6.0 15.1 100.0 110.4 90.6 1.0 14.9 110.6 116.8 94.7 Field Moisture o/6 dry wt Drv lb/cu ft 14.3 110.8 16.8 99.8 18.2 103.6 17.3 102.4 16.6 107.8 14.5 106.7 14.5 104.8 14.7 107.0 16.7 103.7 15.0 110.6 18.8 104.1 18.4 101.9 18.9 102.1 17.2 100.3 15.3 107.7 13.6 117.7 12.0 110.5 14.4 107.9 19.1 103.3 20.3 106.2 20.6 ,102.2 20.9 102.9 17.2 99.6 21.2 101.1 17.4 100.9 17.0 100.9 14.5 113.6 20.2 100.6 16.6 108.9 18.2 107.6 19.4 106.7 18.8 109.4 18.7 102.0 16.8 105.8 16.7 106.9 17.0 109.3 18.5 104.8 Maximum Dry Density Ib/cu ft Canpaction Remarks 110.4 91.3 110.4 90.4 111.8 92.7 113.4 90.3 117.8 91.4 117.8 90.5 114.8 91.2 117.8 90.7 114.8 90.2 117.8 114.8 ,93.8 90.6 110.2 92.5 112.2 91.0 107.9 93.0 117.8 91.4 121.6 96.8 117.8 93.8 117.8 91.5 114.3 90.4 114.8 92.4 111.3 91.8 Ill.3 92.5 109.0 91.4 111.3 90.0 111.3 90.7 111.3 90.7 118.6 95.8 111.3 90.4 118.6 91.8 118.6 90.7 118.6 90.0 118.6 92.3 111.8 91.2 117.8 90.6 117.8 90.7 117.8 92.7 114.8 91.2 SINTON LNOINLEIINO. INC. - - - - - - - - - - - - - - Project NO. 77-8-1D Warmington Development, Inc. Test No. Approx- Depth imate of Fill Location at Test Bldg. No. in Feet Field Moisture % dry wt Density Ib/cu ft Maximum Dry Density Ib/cu ft Percent Compaction 70 81 3.0 18.2 106.6 117.8 90.4 71 '104 2.0 17.2 101.3 110.7 91.5 72 102 1.0 18.0 101.9 110.7 92.0 73 103 3.0 17.9 103.8 110.7 93.8 74 Dehesa Ct. 2.0 18.4 103.5 110.7 93.5 75 76 77 1.0 19.1 103.0 110.7 93.0 2.0 20.7 '99.8 110.7 90.1 2.0* 24.3 92.3 110.7 83.4 78 3.0* 13.9 110.5 118.6 93.2 79 opp. Lot 74 92 91 151 (Garage Area) 149 (Garage Area) 147 (Garage Area) 138 20 19 18 17 74 83 135 132 134 130 133 @Zar) (::a,) (Car) (Car) (Car ) (Ear) (R7e5ar) l5.0* 14.2 106.6 116.8 91.3 80 81 82 83 84 85 86 87 88 89 90 91 92 3.0* 17.4 107.1 118.6 90.3 2.5* 13.6 97.2 118.6 82.0 7.0* 13.1 100.3 118.6 84.5 9.0* 13.4 102.2 118.6 86.2 5.5* 13.5 97.4 118.6 82.2 9.0 21.4 98.9 109.4 90.4 4.0 21.1 loo.4 111.2 90.4 6.0 22.1 101.8 111.2 91.5 1.0 18.9 105.6 111.2 94.9 5.0 19.8 101.8 111.2 91.6 1.0 17.7 106.2 111.2 95.5 4.0 17.0 107.7 115.2 93.5 2.0 13.9 97.1 107.2 90.6 93 94 95 96 97 98 2.0 18.0 loo.0 109.5 91.3 4.0' 18.0 107.3 114.8 93.4 4.0 17.9 106.8 114.8 92.9 6.0 19.3 104.3 114.8 90.8 6.0 16.7 103.9 114.8 90.4 8.0 16.3' 100.3 109.5 91.6 *Indicates finished grade r-3 Dry Remarks Reworked Reworked Reworked Rewwked Reworked Buttress Buttress Buttress Buttress Buttress Buttress Buttress BLNlON LNOINLLIINQ. INC. T-4 ,- - - - - - - - - - - - - Project NO. 77-8-1D Warmington ‘Development, Inc. Test No. 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 Approx- imate Location Bldg. No. (liar) (Car) (Car) (Car) (Ear) (Car) (R7e9ar) (Ear) (Car) (FEar) (Ear) (Car) (liar) (kar ) (Car ) (Car) (FEr) 136 132 129 (Car) 45 44 46 73 Depth of Fill at Test in Feet 8.0 Field Moisture 96 dry wt 16.7 10.0 17.2 10.0 15.7 12.0 18.9 12.0 16.5 14.0 19.2 14.0 16.4 16.0 19.2 16.0 19.8 18.0 15.8 18.0 15.6 20.0 15.7 20.0 16.1 22.0 16.0 22.0 21.4 24.0 21.7 24.0 21.7 11.0 14.9 5.0 15.5 1.0 15.7 26.0 21.1 2.0 20.4 3.0 21.1 6.0 20.3 4.0 14.0 *Indicates finished grade Dry Density Ib/cu ft 108.0 100.5 100.1 106.2 100.6 105.1 104.5 99.2 103.0 99.6 103.2 102.2 105.6 107.5 99.7 101.1 102.5 112.2 108.5 109.2 100.9 97.2 99.1 105.0 100.7 Maximum Dry Density Ib/cu ft 115.2 109.5 109.5 117.8 111.8 114.8 114.8 109.5 113.4 109.5 113.4 113.4 114.8 114.8 109.2 110.9 113*1 115.7 115.7 114.6 111.2 107.2 109.0 114.7 111.8 Percent Capaction Remarks 93.7 91.8 91.4 90.1 90.0 91.5 90.9 90.6 90.8 90.9 91.0 90.1 91.9 93.6 91.3 91.2 90.7 97.0 93.8 95.3 90.7 90.7 90.9 91.5 90.1 Buttress Buttress Buttress Buttress Buttress Buttress Buttress Buttress Buttress Buttress Buttress Buttress Buttress Buttress Buttress Buttress Buttress Buttress BENTON ENGINEERING. INC. Project NO. 77-8-1D Warmington Development, Inc Test No. 124 125 126 127 - 128 129 130 - 131 132 133 134 135 136 - 137 138 139 - 140 141 142 - 143 144 145 - 146 147 148 - 149 150 - 151 152 153 - 154 155 156 - 157 158 159 - 160 161 162 - 163 164 - Approx- Depth imate of Fill Location at Test Bldg. No. in Feet 74 76 (R8eOarr) (Zar) 78 80 81 79 82 80 83 81 82 21 22 23 24 45 44 4, 45 44 47 48 20 19 18 12 11 10 9 8 73 17 16. 15 83 22 24 25 26 6.0 14.7 109.3 117.8 92.7 8.0 14.9 105.0 114.8 91.4 28.0 15.0 102.9 111.8 92.0 30.0 6.0 16.3 105.5 114.8 91.8 6.0 16.0 104.8 114.8 91.2 7.0 16.9 107.0 117.8 90.8 8.0 11.9 111.2 115.2 96.5 6.0 11.8 109.7 117.0 93.8 10.0 12.9. 111.4 117.0 95.2 8.0 13.1 110.0 117.0 95.0 11.0 11.7 106.4 114.8 92.6 10.0 10.5 110.3 117.8 93.6 2.5* 11.4 107.5 118.6 90.7 2.5* 12.5 104.2 118.6 87.9 1.5* 10.4 109.4 118.6 92.3 3.5* 13.1 106.4 118.6 89.7 6.0 14.8 114.5 118.6 96.6 7.0 13.1 116.0 118.6 97.8 8.0* 12.6 118.0 118.6 99.5 9.0* 15.5 112.7 118.6 95.0 10.0* 16.0 111.2 118.6 93.8 2.0* 14.7 108.5 118.6 91.4 2.0* 13.0 102.7 118.6 86.6 2.5* 9.4 ' 112.6 118.6 95.0 7.0* 11.7 106.9 118.6 90.1 9.0* 7.6 111.2 118.6 93.7 4.0* 13.4 110.9 118.6 93.5 4.0" 11.7 112.6 121.6 92.6 5.of 15.1 105.6 116.7 90.5 6.0* 12.8 116.9 121.6 96.2 5.0* 9.7 105.9 116.7 90.7 11.0 15.7 112.8 121.6 92.8 5.5* 12.4 112.3 118.6 94.7 5.0* 12.5 120.1 128.4 93.8 1.5* 11.4 105.0 116.0 90.5 12.0 14.8 97.5 107.2 91.0 2.5* 11.3 109.1 118.6 92.0 3.5* 13.4 110.1 118.1 93.3 2.5* 9.3 114.1 118.1 96.6 2.5* 13.2 117.5 121.6 96.6 Field Moisture % dry wt 15.1 T-5 Dry Maximum Dry Density Density Percent Ib/cu ft Ib/cu ft Canpaction 100.4 111.8 90.0 Remarks Buttress Buttress Rewaked Reworked Rewaked Ck on #81 Ck on 'f82 Ck on #83 Ck on 884 Ck on #138 Ck on 1140 *Indicates finished grade BENTON LNGm4LE”ING. INC. .- - - - - - - - - - - - - - Project No. 77-8-1D Warmington Development, Inc. Approx- Depth imote of Fill Test Location at Test No. Bldg. No. in Feet 165 27 1.5* 166 30 2.0* 167 31 1.0” 168 105 5.0 169 108 2.0 170 119 1.0 T-6 Field Dry Maximum Dry Moisture Density Density % dry wt lb/w ft lb/w ft Percent Canpaction Remarks 12.9 109.1 118.1 92.4 8.0 114.4 118.1 96.9 10.8 111.8 118.1 94.7 20.0 102.2 110.9 92.1 19.5 103.1 110.9 93.0 14.2 100.3 110.9 90.4 *Indicates finished grade BENTON LNOINELRING. INC. -. - - - - - - - - - - - - - - Project NO. 77-8-1D Warmington Development, Inc. L-l LABORATORY TEST RESULTS The maximum dry densities and optimum moisture contents of the maja fill materials as determined by the A.S.T.M. D 1557-70 method, that uses 25 blows of a 10 pound rammer falling frun a height of 18 inches on each of 5 layers in a 4 inch diameter l/30 cubic foot cunpaction cylinder, are presented as follows: Soil Description Maximum Dry Density Ib,‘cu ft Optimum Mois- ture Content o/o dry wt Light brown gray clayey silt 107.2 19.0 Olive green silty clay 107.5 16.4 Brown gray silty clay 109.0 17.8 Yellow brown very fine to fine sandy clay 110.4 15.5 Gray brown fine sandy clay 110.9 14.3 Olive green silty clay 111.2 15.0 Light gray silty very, fine to fine sand with slight 115.2 13.7 clay binder Groy black silty clay Brown clayey fine sand with sane fine sandy clay Light brown and gray silty clay Light yellow brawn fine sandy clay Brown clayey fine to medium sand Grayish brown silty fine sand Red brown fine to medium sandy clay Light gray silty clay with yellow streaks Light gray silty fine sand Brown silty clay Light gray brown fine sandy clay with scattered 116.8 11.8 117.8 13.3 118.6 14.0 121.6 11.5 128.0 9.2 117.0 13.1 111.3 15.0 110.7 15.1 111.8 12.5 110.8 17.2 118.1 14.1 pea gravel Light gray brown silty very fine to fine sand 117.8 13.1 Light yellow brown clayey very fine to fine sand 114.8 14.1 Gray silty very fine sand 112.2 16.0 Light yellow brown very fine to fine sand 107.9 18.1 Light gray silty fine sand 111.8 12.5 Gray with red brown and white silty clay 114.7 15.3 BLNTON LNGINCLIING. INC.