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Home My WebLink AboutCT 72-20; Seapoint Village La Costa; Soils Report Final; 1987-11-18CATLIN ENGINEERING, INC. P.O. Box 4225 La Mesa, California 92044-0970 - (619) 588-8500 - - - - - - - - - - Continental American Properties 1764 San Diego Avenue San Diego, California 92110 ATTN: Ms. Carol Fox November 18, 1987 Subject: Project No. 2OC5C(l) Final Report of Compacted Filled Ground Proposed Condominium Complex 3171 Venado Street Carlsbad, California Gentlemen: This report records our observations and the results of tests performed in connection with the compaction of backfill placed in utility trenches, and the subgrade and aggregate base placed in the private streets and parking areas of the subject property. This property is more particularly referred to as Assessors Parcel No. 223-190-09, -10, -11, -12, -13, -14, -15, -16, and -17, in the City of Carlsbad, County of San Diego, State of California. We refer to our First Interim Report of Compacted Filled Ground dated March 12, 1986, Second Interim Report of Compacted Filled Ground dated October 9, 1986, Third Interim Report of Compacted Filled Ground dated November 3, 1986, Fourth Interim Report of Compacted Filled Ground dated December 4, 1986, Fifth Interim Report of Field Density Tests, dated August 18, 1987, and to two reports by Benton Engineering, Inc: Final Report of Compacted Filled Ground, dated November 27, 1974 and Site Inspection and Recommendations for Construction, dated July 22, 1981. This report addresses backfill, subgrade and aggregate base placement and compaction accomplished during the period from August 17, 1987 through November 17, 1987. The results of the field density tests and the elevations at which they were taken are presented on pages T-43 through T-48 under "Field Density Test Results." The results of the laboratory tests of the maximum dry density and the optimum moisture content of the backfill material, subgrade and aggregate base are presented on pages L-l and L-2 under "Laboratory Test Results." The approximate locations of the field density tests are presented on Drawing Nos. 8, 9, 10, and 11 entitled "Approximate Location of Compacted Filled Ground." The drawings were sketched from a reduced copy of the undated plans entitled "Site and Utilities Plan for Sea Point Village, La Costa" prepared by Rick Engineering Company, and our field observations. Field dimensions are established by a combination of pacing and taping. - i Consulting Engineers and Geologists - - - - - - - - - - - PAGE 2 CON-AM/VENADO STREET 2OC!lC(l) NOVEMBER 18, 1987 We conclude that the trench backfill soils placed under our inspection have been compacted to at least 90 percent of their maximum dry density. Also, the upper six inches of subgrade and the aggregate base placed under our inspection have been compacted to at least 95 percent of their maximum dry density. Please be aware that proper site drainage and continuous maintenance of drainage facilities is directly related to the stability of foundations as well as the stability of cut and fill slopes. We therefore recommend that surface run-off be directed away from slopes and foundations, toward the street or other drainage facilities without intermediate ponding. Surface waters should not be permitted to flow over the top of any exposed slopes. We further recommend that we be authorized to review the design and construction of foundations and inspect any further grading or trench backfill in order to assure that our recommendations have been understood. Seemingly minor variations between our recommendations and the construction can result in essentially nullifying their advantageous effects. This would result in a waste of engineering, time, money, and materials. If foundations or further earthwork are not inspected by us, we offer no assurance of adequate foundation performance or that any of our conclusions related to soil stability may be relied upon. Pages T-43 through T-48, L-l, L-2, and Drawing Nos. 8, 9, IO, and 11 are parts of this report. The opportunity to be of service is sincerely appreciated. Respectfully submitted, CATLIN ENGINEERING, INC. 1 William G. Catlin President RCE 11579 Distr. (4) Addressee WGC/kaw/scr/kjg/B - - - - - - -~ - - - - - - - PAGE T-43 CONTINENTAL AMERICAN/VENADO STREET 2OC5C(l) NOVEMBER 18, 1987 FIELD DENSITY TEST RESULTS Field density tests were performed in accordance with the current ASTM D 1556 "Standard Test Method for Densitv of Soil In Place by the Sand-Cone Method." The results are presented below.- Test Moisture Dry Relative Test Location Elevation Content Density Soil Compaction Test No. of Test (ft) (% dry wt) bcf) Type (%I Date Remarks SEE DRAWING # 9 STORM DRAIN 631 VENADO -1.0 632 ’ FG SEE DRAWING #lO 80X BACKFILL 633 LOT 277 FG UTILITY BACKFILL 634 LOT 278 FG SEE DRAWING X11 WATER t SEWER 635 LOT 275 FG 636 ’ FG Il.6 116.8 10.9 114.9 SUB-AREA DRAIN 637 LOT 274 -1.5 16.0 114.5 638 ’ -1.5 16.7 108.3 639 ” FG 16.4 110.3 BOX INLET 640 LOT 275 -3.0 641 ” -2.0 642 ” FG 15.7 15.5 111.4 114.9 19.9 106.8 9.5 116.4 14.7 107.8 10.2 115.9 11.3 112.8 G G G G F F G G G G G G 94.1 8-13-87 97.0 n 90.2 ” RETEST OF #400 98.3 8-17-87 95.3 8-19-87 93.7 ” 96.7 e-20-87 RETEST OF #504 91.5 M RETEST OF #506 93.2 n RETEST OF #507 91 .O 8-21-87 97.9 ” 95.3 n - .~ - - - - - - - - - - - - - - - - PAGE T-44 CONTINENTAL AMERICAN/VENADO STREET 2OC5C(l) NOVEMBER 18, 1987 TABLE OF TEST RESULTS Field density tests were performed in accordance with the current ASTM 0 1556 "Standard Test Method for Densitv of Soil In Place by the Sand-Cone Method." The results are presented below. - Test Moisture Test Location Elevation Content No. of Test (ft) (X dry wt) SEE DRAWING # 10 UTILITY TRENCH 643 LOT 278 FG 13.8 SEE DRAWING # 9 644 VISTA MAR SUBGRADE 7.9 645 ’ II 10.3 646 ” II 11.1 647 " BASEGRADE 10.8 648 " II 6.2 649 ' ,I 5.2 650 ' ,I 8.0 651 ' II 7.0 652 ' " 7.2 653 ' II 6.4 654 " II 4.3 655 VENADO SUBGRADE 14.4 656 VISTA MAR BASEGRADE 15.5 SEE DRAWING # 11 UTILITY TRENCH 657 LOT 274 FG 14.6 SEE DRAWING # 9 658 VENADO BASEGRADE 6.9 659 LOT 280 FG 13.6 660 w FG 13.3 Dry Density (pcf) Relative Soil Compaction Test Type 1%) Date Remarks 116.5 G 115.1 N 127.8 J 126.9 J 121.0 F 130.1 P 130.2 P 130.1 P 126.8 P 129.8 P 130.2 P 129.3 P 110.7 A 124.8 P 115.7 G 137.8 I 114.9 8 119.0 8 98.4 8-24-87 95.2 8-31-87 96.0 " 95.3 n 98;7 " 99.4 g-02-87 99.5 I0 99.4 u 96.9 ' 99.2 g-03-87 99.5 " 98.8 ' 97.2 " 95;4 " 97.7 " 99.4 " 90.0 g-10-87 93.1 It - - PAGE T-45 CONTINENTAL AMERICAN/VENADO STREET 2OC5C(l) NOVEMBER 18, 1987 TABLE OF TEST RESULTS - Field density tests were performed in accordance with the current ASTM D 1556 "Standard Test Method for Density of Soil In Place by the Sand-Cone Method." The results are presented below. - Test Moisture Dry Relative Test Location Elevation Content Densitv Soil Comoaction Test - No. of Test (ft) (X dry wt) (pcf)” Type ’ - - - - - - - - - - - - - - SEE DRAWING W 10 661 VISTA RICA SUBGRADE 662 ' II 663 ' II 664 " " , SEE DRAWING # 11 'WALL BACKFILL 665 LOT 276 270.0 UTILITY BACKFILL 666 LOT 275 FG WALL BACKFILL 667 LOT 276 272.0 SEE DRAWING # 10 668 VISTA RICA BASEGRADE 669 ' II 670 ' I 671 ' II 672 ' " 673 " 00 SEE DRAWING Y 11 UTILITY BACKFILL 674 LOT 276 FG SEE DRAWING # 10 675 VISTA RICA BASEGRADE 676 ' " 677 ' II 12.8 121.4 7.9 125.3 5.4 122.0 9.0 124.5 7.8 116.5 17.3 111.2 14.6 107.9 9.4 127.9 3.8 128.9 5.2 115.9 5.1 128.7 5.0 124.4 5.1 129.8 13.7 116.8 5.6 130.5 6.2 129.0 4.3 127.6 B B B B G G G P P P P P P B P P P w Date Remarks 95.0 9-14-87 98.0 ’ 95.5 l” 97.4 ” 98.4 9-15-87 93.9 It 91.1 It 97.7 ” 98.4 ” 88.5 " FAILED SEE #671 98.3 9-16-87 RETEST OF #670 95.0 la 99.2 It 91.4 n 99.7 9-17-87 98.5 ’ 97.5 ” - - - - - - - - - - - - - - - - - - PAGE T-46 CONTINENTAL AMERICAN/VENADO STREET 2OC5C(l) NOVEMBER 18, 1987 TABLE OF TEST RESULTS Field density tests were performed in accordance with the current ASTM D 1556 "Standard Test Method for Density of Soil In Place by the Sand-Cone Method." The results are presented below. Test Moisture Dry Test Location Elevation Content Density No. of Test (ft) (% dry wt) (pcf) SEE DRAWING # 10 678 VISTA RICA BASEGRADE 7.4 679 It II 4.7 SEE DRAWING # 11 WALL BACKFILL 680 LOT 276 274.0 20.3 681 " 276.0 15.5 SEE DRAWING # 10 WALL BACKFILL 682 VENADO STREET SUBGRADE I.3 683 " I, 10.6 684 ' BASEGRADE 7.4 685 " II 7.9 SEE DRAWING #ll 686 LOT 275 FG 14.0 UTILITY BACKFILL 687 LOT 274 FG 12.6 688 u FG 15.8 689 ' FG 14.3 UTILITY BACKFILL -. 690 CALLE FUEGO -2 13.3 691 II FG 8.5 692 II FG 11.9 CALLE FUEGO 693 STA It55 SUBGRADE 11.5 694 STA Ot53 It 10.7 121.2 130.6 128.6 108.1 110.6 110.8 114.2 133.6 131.5 110.3 111.5 111.5 109.1 112.9 117.0 119.1 120.5 Relative Soil Comoaction Test Type P UP G G L L I I G G G G F F F F F if4 99.8 98.2 91.3 93.4 96.4 99.3 96.4 95.0 93.1 9-18-87 94.2 94.2 92.1 92.1 95.4 97.2 98.3 10-27-87 98.9 Date Remarks 9-17-87 10 9-28-87 II 0 10-05-87 II I, - - - - - - - - - - - - - - - PAGE T-47 CONTINENTAL AMERICAN/VENADO STREET 2OC5C(l) NOVEMBER 18, 1987 TABLE OF TEST RESULTS Field density tests were performed in accordance with the current ASTM 0 1556 "Standard Test Method for Oensitv of Soil In Place by the Sand-Cone Method." The results are presented below. - Test Moisture Dry Test Location Elevation Content Density No. of Test (ft) (% dry wt) (pcf) CALLE FUEGO 695 STA 2t30 BASEGRAOE 696 STA 2t45 ' 697 STA 3tO5 ' 698 STA 3t79 ’ 699 VENADO STREET n CALLE FUEGO 700 STA 0+35 ' 701 STA It11 ’ 702 STA lt60 ’ CALLE VIENTO BUILDING #58 703 LOT 275 -2 704 0 SUBGRAOE 705 VI II 706 ' ,I CALLE VIENTO 707 LOT 274 ' 708 LOT 275 ' CALLE VIENTO 709 BUILDING #61 LOT 274 -3 BUILDING #40 710 LOT 274 SUBGRADE BUILDING #59 711 LOT 274 -2 3.7 132.0 H 96.1 7.1 136.6 H 99.4 6.2 132.6 H 96.5 5.8 130.8 H 95.2 5.7 138.2 I 99.7 2.9 136.9 H 99.6 4.7 137.0 H 99.7 6.5 136.8 H 99.6 4.1 120.0 P 91.7 12.8 126.5 B 99.0 14.0 116.5 F 95.0 4.6 130.6 P 99.8 9.4 9.6 -. 126.9 B 99.3 126.0 B 98.6 20.8 107.9 G 91.1 20.4 122.3 8 95.6 20.1 109.8 G 92.7 Relative Soil Comoaction Test Type i%) Date Remarks 10-28-87 10-29-87 II 0 ” 10-30-87 " II 11-12-87 II ,I II II I# - PAGE T-48 CONTINENTAL AMERICAN/VENADO STREET 2OC5C(l) NOVEMBER 18, 1987 TABLE OF TEST RESULTS - Field density tests were performed in accordance with the current ASTM D 1556 "Standard Test Method for Density of Soil In Place by the Sand-Cone Method." The results are presented below. - - - - -~ - Test Moisture Dry Relative Test Location Elevation Content Density Soil Compaction Test No. of Test (ft) (% dry wt) (pcf) Type (%I Date Remarks CALLE VIENTO BUILDING #58 712 STA 2t30 BASEGRADE 3.9 713 STA lt40 ' 4.5 128.6 BUILDING 1161 ' 714 STA 4t20 ' 4.4 715 STA 4t73 " 5.6 716 STA lt67 ' 5.2 717 STA 3t40 ' 5.9 718 STA lt35 ' 4.8 -. 128.6 135.9 137.0 133.7 133.6 134.3 93.6 11-16-87 FAILED SEE # 93.6 ” FAILED SEE #718 98.9 W 99.7 " 97.3 11-17-87 97.2 I' 97.7 " RETEST SEE #713 - - - - - - - - - - - - - - PAGE L-l CONTINENTAL ANERICAN/VENADO STREET 2OC5C(l) NOVEMBER 18, 1987 LABORATORY TEST RESULTS The maximum dry density and optimum moisture contents of the soils as determined by the ASTM D1557-70 method, that uses 25 blows of a 10 pound rammer falling from a height of 18 inches on each of 5 layers in a 4 inch diameter l/30 cubic foot compaction cylinder, are presented as follows: Soil Type A B C II E F G H I J K L M N Light Yellow Brown Fine to Medium Sand 120.9 9.8 Soil Description Maximum Dry Density lb/cu.ft. Optimum Moisture Content % Dry Wt. Gray Tan silty Clay 113.8 Red Brown Very Fine to Coarse Clayey Sand 127.8 Green With Red Streaks Silty Clay 106.3 Medium Brown Silty Fine Sand With Clay Binder 122.9 Tan Yellow silty Clay 120.4 Light Brown-Orange clayey Fine to Coarse Sand 122.6 Olive Brown Fine to Medium Clayey Sand _. 118.4 Gray Silty Fine to Coarse Sand (Import) 137.4 6.9 Gray Brown Silty Fine to Coarse Sand (Import) 138.6 7.2 Brown Clayey Fine to Coarse Sand 133.1 Brown Silty Fine to Coarse Sand (Import) 125.5 Tan Clayey Silty Fine to Medium Sand (Import) 115.0 Medium Brown Gray Fine to Medium Sandy Clay 120.5 13.3 16.4 9.5 15.4 12.0 13.0 12.7 14.0 8.9 8.7 15.0 - - LABORATORY TEST RESULTS - - - - - - - PAGE L-2 CONTINENTAL AMERICAN/VENADO STREET 2OC5C(l) NOVEMBER 18, 1987 The maximum dry density and optimum moisture contents of the soils as determined by the ASTM 01557-70 method, that uses 25 blows of a 10 pound rammer falling from a height of 18 inches on each ,of 5 layers in a 4 inch diameter l/30 cubic foot compaction cylinder, are presented as follows: Soil We 0 P Soil Description Tan Fine to MediumSilty Sand Brown Very Fine to Coarse Sand (Import) Maximum Dry Density lb/cu.ft. 118.0 130.9 Optimum Moisture Content % Dry Wt. 11.3 8.4 - - - - -