Loading...
Amberpoint BP 2R-LR060208February 8, 2006 Transwestern Commercial Services 5001 Spring Valley Road, Suite 600W Dallas, Texas 75244 Attn: Re: 'lrerfacon Consulting Engineers & Scientists Terracon Consultants, Inc. 8901 Carpenter Freeway, Suite 100 Dallas, Texas 75247 Phone 214.630.1010 Fax 214.630.7070 www. terracon.corn Mr. Jim Gaspard /~///4_~ ,~ ~' A~t Buildi.ng 5 ~ndy Lake Road Coppe,l, Texas Terracon Project No. 94051418.0168 Dear Mr. Gaspard: Terracon has completed its evaluation of moisture levels achieved bywater pressure injection at the above referenced site. This was the third evaluation performed by Terracon for the referenced project (Building 5). The building pad was injected with two additional passes of water (for a total of eight) to a maximum depth of about 7 feet prior to this evaluation. The injection process was observed on a full time basis by a representative of Terracon. Fourteen bodngs were drilled on February 4, 2006. Each boring was continuously sampled to a maximum depth of 7 feet with thin-walled tube samplers. The samples were extruded, logged, sealed and packaged at the site for transportation to the laboratory. In the laboratory, moisture content and hand penetrometer readings were determined on one-foot intervals. Swell tests were performed on selected soil samples. A diagram depicting the approximate boring locations is attached. Laboratory data is provided on the attached Summary of Laboratory Tests. Review of the laboratory data generally indicates out of fourteen borings only two borings (B-42 and B-43) are indicated to be below desired moisture levels with one boring (B-44) being marginal. Considering that eight injection passes have been made we recommend that somewhat higher movement potential be accepted in this area and that construction proceed. Delivering Success for Clients and Employees Since 1965 More Than 70 Offices Nationwide Transwestern Commercial Services February 8, 2006 Project No. 94051418.0168 Please contact us if there are any questions concerning the test results or recommendations. Sincerely, /! ,.c . ~.,'~7,~, ,%~ ~ ..................... .,~ Project Manager ~...86610 "?~'~ Principal CC~ Lee Stone - City of Coppell Larry Davis - City of Coppell Leon Davis - Rogers O'Brien Construction Company Richard Nordyke - O'Brien & Associates Keith Leslie - Technistructures 2 l~rracon LABORATORY TEST RESULTS B-37 Hand Moisture Moisture Load Swell Depth Penetrometer Content After Content (%) (Psf) (%) (ft) (tsf) Swell Test (%) 0-1 0.0 28.6 1-2 0.25 28.6 2-3 2.00 20.8 21.6 500 0.3 3--4 0.75 28.4 4-5 2.75 19.4 19.9 750 0.0 5-6 2.50 19.8 6-7 0.75 26.4 B-38 Hand Moisture Moisture Load Swell Depth Penetrometer Content After (ft) (tsf) Content (%) Swell Test (%) (Psf) (%) 0-1 1.75 22.9 1-2 1.75 22.7 2-3 1.25 21.3 3-4 2.25 21.4 4-5 1.25 23.4 5-6 1.50 20.8 6-7 0.75 21.1 B-39 Hand Moisture Moisture Load Swell Depth Penetrometer Content After Content (%) (Psf) (%) (ft) (tsf) Swell Test (%) 0-1 3.25 19.6 1-2 0.75 25.7 2-3 4.5+ 17.1 3-4 4.50 17.5 19.1 625 0.3 4-5 3.00 19.6 20.5 750 0.2 5-6 1.75 20.6 6-7 3.75 18.6 Project No. 94051418.0168 LABORATORY TEST RESULTS B-40 Hand Moisture Moisture Load Swell Depth Penetrometer Content After Content (%) (Psf) (%) (ft) (tsf) Swell Test (%) 0-1 1.00 22.4 1~2 1.50 25.2 2-3 1.50 24.3 3-4 3.25 21.4 23.6 625 0.8 4-5 3.50 17.4 5-6 3.75 19.1 20.2 875 0.3 6-7 4.5+ 15.2 B-41 Hand Moisture Moisture Load Swell Depth Penetrometer Content After Content (%) (Psf) (%) (ft) (tsf) Swell Test (%) 0-1 1.00 29.8 1-2 1.50 23.9 2-3 1.25 21.7 3-4 3.00 20.7 21.4 625 0.5 4-5 2.75 19.6 5-6 4.5+ 15.7 19.6 875 2.2 6-7 3.00 18.7 B-42 Hand Moisture Moisture Load Swell Depth Penetrometer Content After Content (%) (Psf) (%) (ft) (tsf) Swell Test (%) 0-1 2.00 23.6 1-2 4.5+ 19.1 21.6 375 2.8 2-3 4.5+ 19.4 3-4 4.5+ 18.4 23.8 625 3.2 4-5 3.50 20.9 5-6 4.25 19.6 2'1.0 875 0.2 6-7 2.50 21.9 Project No. 94051418.0168 'I ~rrac~n LABORATORY TEST RESULTS B-43 Hand Moisture Depth Penetrometer Moisture Content After Load Swell (ft) (tsf) Content (%) Swell Test (%) (Psf) (%) 0-1 4.5+ 17.3 1-2 4.5+ 17.9 19.9 375 1.8 2-3 4.5+ 17.1 3-4 4.5+ 16.8 21.8 625 1.1 4-5 4.5+ 18.9 21.1 750 2.2 5-6 4.5+ 18.1 6-7 3.00 19.1 B-44 Hand Moisture Depth Penetrometer Moisture Content After Load Swell (ft) (tsf) Content (%) Swell Test (%) (Psf) (%) 0-1 3.75 24.3 1-2 4.5+ 18.3 23.2 375 4.9 2-3 2.50 22.6 3-4 2.75 21.6 4-5 4.25 19.3 20.6 750 0.6 5-6 4.00 20.8 6-7 3.50 20.0 21.4 1,000 0.0 B-45 Hand Moisture Moisture Load Swell Depth Penetrometer Content After (ft) (tsf) Content (%) Swell Test (%) (Psf) (%) 0-1 1.25 22,2 1-2 Z.00 20.0 2-3 3.50 20.7 22.2 500 1.2 3-4 2.50 19.2 4-5 3.25 18.3 5-6 3.75 19.6 20,5 875 0.3 6-7 2.50 18.6 Project No. 94051418.0168 LABORATORY TEST RESULTS B-46 Hand Moisture Moisture Load Swell Depth Penetrometer Content After Content (%) (Psf) (%) (ft) (tsf) Swell Test (%) 0-1 2.50 23.1 1-2 4.50 20.4 24.8 375 2.5 2-3 2.75 21.7 3-4 2.75 19.2 21.2 625 0.0 4-5 2.25 20.3 5-6 3.50 19.1 6-7 4.25 18.9 21.8 1,000 0.2 B-47 Hand Moisture Moisture Load Swell Depth Penetrometer Content After Content (%) (Psf) (%) (ft) (tsf) Swell Test (%) 0-1 4.00 22.3 1-2 3.00 21.7 2-3 3.75 19.7 21.2 500 0.3 3-4 2.50 20.9 4-5 2.00 21.4 5-6 3.50 19.6 22.3 875 0.9 6-7 3.00 20.6 B-48 Hand Moisture Moisture Load Swell Depth Penetrometer Content After Content (%) (Psf) (%) (ft) (tsf) Swell Test (%) 0-1 0.75 27.5 1-2 2.50 25.3 2-3 2.25 23.9 3-4 4.00 23.9 25.2 625 0.5 4-5 3.75 21.2 5-6 3.75 18.4 6-7 4.00 18.9 19.6 1,000 0.2 Project No. 94051415.0168 '~fr~..an LABORATORY TEST RESULTS B-49 Hand Moisture Moisture Load Swell Depth Penetrometer Content After Content (%) (Psf) (%) (fi) (tsf) Swell Test (%) 0-1 0.50 27.7 1-2 2.75 21.5 2-3 3.50 23.3 25.1 500 0.6 3-4 2.75 18.7 4-5 2.75 19.2 20.3 750 0.3 5-6 2.50 19.7 6-7 2.75 16.9 B-50 Hand Moisture Moisture Load Swell Depth Penetrometer Content After Content (%) (PSf) (%) (ft) (tsf) Swell Test (%) 0-1 1.25 22.6 1-2 1.75 20.1 2-3 2.25 16.5 3-4 3.50 20.7 22.0 625 0.6 4-5 3.25 19.9 5-6 3.75 18.9 21.2 875 0.5 6-7 3.00 18.4 Project No. 94051418.0168