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Home My WebLink AboutCT 04-10A; POINSETTIA PLACE; REPORT OF GEOTECHNICAL TESTING AND OBSERVATION ROUGH GRADING FOR BUILDING PAD 5; 2013-04-13•: :: 0410A : .GeoTek, .1384 Poinsettia Avenue, Suite .A Vista, CA 92081-8505 . . (760) 599-0509. Office (760) 599-0593 Fax.. www.geotekusa.com April 13, 2011: PN 3389-SD- Shea Homes. Limited Partnership, San Diego . ;• . 9990 Mesa Rim Road San Diego, California 92121 Attention: Ms. Sarah Beckman . . . . Subject: Report of Geotechnical Testing and Observation Rough Grading:for Building Pad 5.. CTO4-10 •..•. . ...... . Carlsbad, California 92009 . Dear Ms Beckman, In accordance with your request, GeoTék, Inc. is pleased to.provide herewith the results of our geotechnical testing and observation services duringrough grading associated with construction.:: of Building Pad 5 on Tract CT 04-10, Carlsbad, California / Construction Summary This'.report is limited to grading of the subject building pad. Recent grading was pe-formed in late 2011 and early 2012 by TNT Grading Grading consisted of approximately three (3) feet of the pre-existing fill was removed, the ground surface was scarified and additional fill placed Fill placed was derived from on site materials and: materials derived: from the extension. of Poinsettia Lane south and east of the tract Fielddensity and laboratory: test results indicate that the fill materials were compacted td, a-* minimum of 90. percent relative compaction at the locations tested; The field density test results are included in Table 2. The approximate locations of the field density tests related to the grading for the subject building pad are shown on Figure I. It should be noted that the area:: of removals and engineered fill is limited to the area indicated on Figure t. GEOTECHNICAL I ENVIRONMENTAL I MATERIALS All material herein @.2012 GeoTek, Inc. All. Rights Reserved Shea Homes Limited Partnership, San Diego . . :0 :•• April 13, 2013 Report 'of Geotechnical Testing and Observation . : 0 Project No. 3389-SD O :• Building Pad 5, CT 04-10 :, : : Page 2 0 •. :' Field Testing ,: 0 0:0 . •. 0 ' : :' 0 0' •0 , .. 0 Our field density testing was performed in general accordance with ASTM Test Method D6983. Our field density testing program was conducted 'as'follows: 0, ', • Field density' tests were taken at 'periodic intervals and, random locations to, check the compaction efforts by the contractor. Visual classification of the soil in the field, compared to the soil descriptions from the laboratory' testing, was the basis for determining the maximum density and optimum 'moisture content applied to each field density test. : •, : Laboratory Testing The laboratory testing pertinent to field density tests is the Moisture-Density Relationships for the various soils encountered. The laboratory 'maximum dry density and optimum moisture content for soil, types tested were determined in general accordance with test method ASTM D 1557.:: Laboratory test results are presented in Table I. . Conclusions It is our professional opinion that the site is suitable for the intended 'use provided that site: ': construction and future maintenance is performed in accordance with 'the recommendations presented herein and in the reference' reports. : Based, on the results of, :the above testing' 'and observations, we conclude that th,é recommendations.' included in the approved 'soils engineering report remain "app cable. Foundation recommendations previously offered in Reference 5 and 6 remain applicable Recommendations '' ' , •' : :: , ': Any additional grading-or construction' on the site should 'be done in accordance with the currently applicable codes', and standards. Recommendations should:be sought from the:: Geotechnical Engineer prior to additional grading.' LIMITATIONS ''' •. Cuts, fills, and processing of original 'ground under the purview of this report,: have been completed under the observation of, and with selective testing by GeoTek, Inc. and are found': to be in compliance with the approved soils engineering report and applicable provisions of the Shea Homes Limited Partnership, San Diego :• April 13, 2013 Report of Geotechnical Testing and Observation :: Project No. 3389-SD •: Building Pad 5.CT04-10 •: : Page 3 : current California.: Building Code (CBC). Our field density testing and observation services during building pad grading followed generally accepted professional engineering practices and no further warranty is implied nor made. This report is subject to review by the controlling.: authorities for this project GeoTek, Inc accepts neither responsibility nor liability for work, testing, or recommendations performed or provided by others We appreciate theopportünity to be of service on this project Please contact the undersigned if you have any questions OFESS/0 Ap OF A OFC : imó . e, CEG 1142 : onald A. Reed, GE 2524 . S Expires 04/ -/14 :: s : Expires: 06130120 13 5 . Principal Geologist .. Senior Project Engineer •• .. • Enclosures References:: : :: • :: • :: Table I Laboratory Test Results. S •• . •. Table 2 Summary of Field Density Test Results • ., Figure I Density Test Location Plan Shea Homes Limited Partnership, San Diego : :• April 13, 2013 Report àf Geotechnical Testing and Observation Project No. 3389-SD Building Pad S. CT 04-10 :• References Selected References I Geotechnical Evaluation Proposed Residential Buildings, SRWB Property, South Side of Cassia Road, East of Poinsettia Lane, Carlsbad, California by GeoTek, Inc dated April 13,2004. :• 2; .Grading and Private -Storm Drain Plan" for CT 04-10, Poinsettia.Pláce, Carlsbad : California prepared by Pangaea Land Consultants, Inc. •. • • . :. . • 3. Stock Pile Grading Plan CT 04-I 0, Poinsettia Place",prepared by Pangaea Land Consultants Inc. undated. . 4. Geotechnical Update and Grading Plan Review, CT 04 10, Poinsettia Place, Poinsettia Lane and Cassia Road, Carlsbad; California 92009 by Géolek, Inc. dated December 2, 2010. . • : 5. "Updated Seismic and Post-Tension Design Parameters;:Vitalia, Tract CT 04-10, •• • . Carlsbad, California 92009" by. GeoTek dated August 29, 2011 revised January 9, 2012. : 6. Review of Post tensioned Plans, Vitallia, Tract CT 04-10, Carlsbad, California 92009 by GeoTek, Inc. dated March 19, 201:2. • •: • • •.• :: Shea Homes Limited Partnership, San Diego April 13, 2013 Report of Geotechnical Testing and Observation : Project No. 3389-SD Building Pad 5, CT 04-10 : :• Laboratory Testing TABLE I LABORATORY TEST RESULTS - ASTM D 1557 : Soil Description Maximum Dry Density (pcf) Optimum Moisture (% HiO) A LightBrown, fine to medium, Silty Sand 121.5 9.5 B Medium Brown fine Silty Sand 117.5 12.0 C. Tan/light Brown fine Silty Sand 114.0. 12.5 GeoTek, Inc. Shea Homes 411312013 Vita/ia Project No.: 3389-SD3 Carlsbad, California Page 1 of I TABLE I SUMMARY OF FIELD DENSITY TESTS GRADING DATE Test No. Location Elev/ Depth Moisture Content (%) Dry Density (pcf) Soil Type - Maximum Density (pcf) Test Type - Relative Compaction (%) 12/17/11 32 BP 5 50.5 12.9 114.2 A 121.5 N 94 12/19/11 38 BP 5 53.0 12.0 113.1 A 121.5 N 93 12/20/11 39 BP 5 54.0 11.0 112.5 A 121.5 N 93 12/20/11 40 BP 5 55.0 11.3 111.4 A 121.5 N 92 12/20/11 41 BP 5 56.0 12.4 109.5 A 121.5 N 90 12/21/11 43 BP5 56.0 14.1 105.5 C 114.0 N 93 12/27/11 69 BP5 252.0 15.1 104.3 C 114.0 N 91 12/28/11 78 BP 5 253.0 20.6 102.5 C 114.0 N 90 12/29/11 81 BP 5 255.0 15.4 104.5 C 114.0 N 92 1/5/12 111 BP5 FG 256.9 14.1 111.7 B 117.5 N 95 1/5/12 112 BP 5 FG 256.9 13.3 110.6 B 117.5 N 94 Note: N = Nuclear Gauge Test FG = Finished Grade Test All elevations are approximate lo I.. .. I GRAPHIC SCALE IN ?EDT) I tth • 20 ft. Legend Density test location / Limits of areas under purview this report All IocaUons are approximate Base map from "Grading Plans for Poinsettia Place" By Pangaea Land Consultants, undated 1384 Poinsettia Avenue. Suite A Vista. California 92081-8505 Density Test Location Plan Shea Homes Rough Grading for Building Pad 5, CT 04-10 Carlsbad, California Figure 1 PN: 3389-SD3 2013