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Stoneleigh P2-LR001011ALPHA TESTING, INC. 2209 Wisconsin St., Suite 100 Dallas, Texas 75229 972/620-8911 - 972/263-4937 (Metro) FAX: 972/406-8023 October l 1, 2000 SPRING VALLEY CONSTRUCTION 10950 Alder Circle Dallas, Texas 75238 Attention: Mr. Keller Webster ' ' Re: Lime Slurry and Water Pressure Injection. STONELEIGH AT RIVERCHASE Buildings 1, 4, 12A, 12B and G2 Coppell, Texas ALPHA Report No. 00652-21 Submitted herewith are results of our analysis of lime slurry and water pressure injection conducted at the above referenced project. Our analysis consisted of sampling soils after lime slurry and water pressure injection to a depth of 7 ft and performing moisture content, pocket- penetrometer and absorption swell tests on representative samples. Sampling of the injected soils using test borings was performed on October 11, 2000. A total of 16 test borings (Borings 7-22) were performed at the approximate locations shown on Figure 1, the Boring Location Plan, to obtain samples of the injected soils for laboratory testing. Individual test results are presented on summary data sheets attached to this report. According to the project geotechnical report (re: ALPHA Report No. 98611 dated August 25, .1998), acceptance of lime slurry and water pressure injection should be based upon attaining an average free swell of 1 percent, or less, from soils within the injected zone. Results of current moisture content tests (Figure 2) indicate the average moisture content of the injected soils at each boring location varies from about 17 to 23. Results of absorption swell tests conducted on samples from the injected zone indicate free swells ranging from about 0.1 to 3.0 percent and averaging about 0.6 percent. Based on results of current moisture content tests and absorption swell tests, it is our opinion the present free swell within the injected soils in Buildings 1, 4, 12A and 12B conforms to the project criteria of I percent, or less. Therefore, it is recommended the lime slurry and water pressure injection at Buildings 1, 4, 12A and 12B be accepted. However, based on results of current moisture content tests and absorption swell tests, it is our opinion the present free swell within the injected soils at Building (12 does not conform to the GeotedmL-~ E~ · ~ ~ Testing · Env/rcmmenta~ Enoheor/r~ · Ccmsutt/r~ project criteria of 1 percent, or less. Therefore, it is recommended the soil swell potential at Building G2 be further reduced by additional water injections. We appreciate the opportunity to be of service to you on this project. If we can be of further assistance, please contact our office. ~.. ~,,~.~,..~..e.i~ ?~ Sincerely yours, f~Z ~'"--x;s' "~,~' ALPHA TESTING, INC. ~~:~ ~avi .~.~.~,,~,~ Manager of Engineering Services D^l /pc Attachments Copies: (3) Client (1) John Datum, A.I.A. (3) City of Coppell SPRING VA~.r.~Y ~IC[~ ~ BORING LOCATIGNS ~.T-, ~ ~65~-21 10-11-00 MOISTURE CONTENT BORING #7 BORING #8 BORING ~ DEPTH % MOIST. HAND PEN DEPTH % MOIST. HAND PEN DEPTH - % MOIST. HAND PEN 0-1 15.4% 3.5 0-1 22.1% 1.0 0-1 21.3% 2.75 0-1 17.6% 3.5 0-1 26.1% 1.5 0-1 18.6% 1.75 1-2 22.5% 1.0 1-2 23.3% 1.0 1-2 25.6% 1.0 1-2 24.3% 1.5 1-2 16.3% 2.0 1-2 23.0% 0.25 2-3 18.5 2.5 2-3 20.8% 2.5 2-3 23.7% 0.75 2-3 15.2% 3.25 2-3 17.2% 2.0 2-3 25.0% 0.25 3-4 14.0% 3.5 3-4 21.9% 1.5 3-4 18.4% 3.75 3-4 18.0% 3.5 3-4 27.7% 2.25 3-4 25.2% 0.75 4-5 20.6% 2.0 4-5 20.3% 1.25 4-5 20.3% 1.25 4-5 15.8% 3.25 4-5 19.4% 2.25 4-5 15.9% 1.75 5-6 26.0% 2.0 5-6 26.4% 1.75 5-6 21.9% 1.0 5-6 18.6% 2.0 5-6 21.0% 2.5 5-6 20.7% 1.25 6-7 22.3% 2.0 6-7 22.3% 1.5 6-7 22.7% 1.0 6-7 22.4% 2.25 6-7 18.5% 2.0 6-7 20.2% 1.75 Spring Valley Construction Laboratory Test Data Dallas, Texas ~...~'_~.~.,' ~ 2 -~- At Riverclmse q~ 8(.~,, ~ 00652-21 lO/ll/O0 MOISTURE CONTENT BORING #10 BORING #11 BORING #12 DEPTH % MOIST. HAND PEN DEPTH % MOIST. HAND PEN DEPTH % MOIST. HAND PEN 0-1 19.6% 19.6 0-1 14.5% 3.0 0-1 20.0% 2.5 0-1 22.9% 0.75 0-1 14.3% 3.25 0-1 24.5% 2.0 1-2 21.8% 0.26 1-2 15.1% 2.5 1-2 24.2% 1.75 1-2 24.0% 0.75 1-2 19.7% 1.0 1-2 12.2% 4.5 2-3 15.9% 2.75 2-3 16.8% 1.75 2-3 15.2% 2.75 2-3 18.4% 2.5 2-3 20.9% 2.5 2-3 13.9% 3.75 3-4 18.3% 2.5 3-4 24.6% 1.75 3-4 21.2% 2.0 3-4 19.9% 1.25 3-4 20.1% 2.0 3-4 16.9% 2.0 4-5 22.3% 0.75 4-5 22.6% 4.5 4-5 21.6% 1.75 4-5 17.3% 1.5 4-5 28.8% 1.25 4-5 23.4% 1.75 5-6 39.2% 1.0 5-6 22.4% 1.75 5-6 20.4% 2.25 5-6 26.2% 0.75 5-6 18.6% 2.25 5-6 27.5% 2.25 6-7 26.1% 1.0 6-7 25.2% 2.0 6-7 25.0% 1.25 6-7 36.1% 1.0 6-7 27.3% 1.5 6-7 25.0% 1.25 Spring Valley Construction Laborator~ Test Data Dallas, Tens Fixture 2 Stonddgh At Rlv~.~ --~ (~Lm~BL 006s2-21 10/11/00 MOISTURE CONTENT BORING #13 BORING #14 BORING #15 DEPTH % MOIST. HAND PEN DEPTH % MOIST. HAND PEN DEPTH % MOIST. HAND PEN 0-1 28.9% 0.75 0-1 20.0% 3.25 0-1 18.9% 1.5 0-1 29.2% 0.75 0-1 21.5% 1.25 0-1 23.8% 3.25 1-2 19.6% 2.0 1-2 19.2% 3.25 1-2 21.0% 1.5 1-2 17.1% 2.25 1-2 20.4% 1.25 1-2 23.4% 0.5 2-3 17.0% 2.25 2-3 12.7% 2.5 2-3 13.8% 0.5 2-3 18.2% 2.25 2-3 17.4% 3.0 2-3 30.2% 1.25 3-4 22.6% 2.0 3-4 15.8% 3.0 3-4 24.0% 2.5 3-4 16.7% 2.25 3-4 18.6% 2.75 3-4 18.8% 2.5 4-5 22.9% 4.5 4-5 27.4% 1.5 4-5 12.8% 4.5 4-5 18.9% 3.0 4-5 19.4% 2.75 4-5 16.4% 4.5+ 5-6 22.3% 3.0 5-6 23.6% 3.0 5-6' 19.4% 2.0 5-6 25.9% 4.0 5-6 17.7% 3.0 5-6 22.3% 2.5 6-7 21.7% 1.5 6-7 33.7% 1.75 6-7 21.4% 2.5 6-7 26.1% 2.5 6-7 33.6'% 1.0 6-7 30.0% 2.5 Spring Valley Construction Laboratory Test Data I)Mim, Texas Figure 2 Copp~ Te~s 00652-2] ]0/11/00 MOISTURE CONTENT BORING #16 BORING #17 BORING #18 DEP'I¥1 % MOIST. HAND PEN DEPTH % MOIST. HAND PEN DEPTH % MOIST. HAND PEN 0-1 24.7% 2.25 0-1 23.1% 3.0 0-1 21.6% 1.5 0-1 19.0% 1.75 0-1 18.0% 2.75 0-1 23.4% 2.0 1-2 24.2% 0.5 1-2 18.4% 3.0 1-2 26.5% 1.0 1-2 20.0% 1.75 1-2 20.3% 3.0 1-2 27.3% 1.0 2-3 19.0% 1.0 2-3 20.8% 0.75 2-3 12.3% 2.5 2-3 20.8% 1.25 2-3 24.1% 1.25 2-3 14.4% 2.5 3-4 19.1% 4.5 3-4 11.8% 4.25 3-4 31.2% 1.5 3-4 15.9% 3.5 3-4 15.3% 3.0 3-4 16.5% 1.5 4-5 24.2% 4.25 4-5 26.3% 2.0 4-5 23.5% 3.0 4-5 17.6% 4.25 4-5 16.9% 1.75 4-5 16.4% 3.0 5-6 22.8% 2.5 5-6 13.8% 4.5+ 5-6 23.6% 1.5 5-6 19.3% 1.75 5-6 11.1% 3.75 5-6 23.3% 2.75 6-7 16.9% 3.5 6-7 29.1% 1.75 6-7 24.3% 3.0 6-7 23.3% 2.25 6-7 17.6% 2.5 6-7 15.9% 4.5+ Spring Valley Construction Laborator~ Test Data Dallas, Texas Figure 2 Stonddgh At mverchase · ~ Texas 00652-21 10ft 1/00 MOISTURE CONTENT BORING #19 BORING P0 BORING ~1 DE(~'I"I % MOIST. HAND PEN DEPTH % MOIST. HAND PEN DEPTH % MOIST. HAND PEN 0-1 31.5% 1.0 0-1 23.3% 1.0 0-1 17.7% 1.5 0-1 27.4% 0.5 0-1 22.7% 1.5 0-1 21.7% 2.25 1-2 19.4% 0.5 1-2 24.3% 1.0 1-2 13.3% 4.0 1-2 22.6% 1.0 1-2 29.3% 1.0 1-2 19.6% 4.0 2-3 12.6% 2.25 2-3 18.6% 3.0 2-3 12.1% 4.5 2-3 14.7% 4.5 2-3 10.7% 3.5 2-3 14.7% 4.5 3-4 20.7% 2.75 3-4 28.1% 2.0 3-4 18.5% 4.0 3-4 22.1% 2.75 3-4 28.0% 2.0 3-4 18.1% 4.0 4-5 21.8% 1.5 4-5 16.5% 3.0 4-5 17.0% 3.0 4-5 28.0% 2.0 4-5 16.2% 3.0 4-5 17.8% 4.5 5-6 18.2% 1.5 5-6 ' 14.0% 3.0 5-6 19.6% 4.0 5-6 27.6% 2.0 5-6 17.6% 4.5 5-6 21.1% 4.0 6-7 31.6% 3.0 6-7 14.5% 3.0 6-7 13.3% 2.25 6-7 23.8% 2.5 . 6-7 20.0% 2.0 6-7 19.4% 2.25 Spring Valle~ Construction Laboratory Test Data DMlas, Texas Figure 2 StonelMgh At Riverehase Coplmil, Tern 00652-21 1WII/00 MOISTURE CONTENT BORING #22 DEPTH % MOIST. HAND PEN 0-1 11.1% 4.0 0-1 16.6% 4.0 1-2 17.8% 4.5+ 1-2 10.4% 4.5+ 2-3 16.7% 4.5 2-3 25.9% 1.5 3-4 17.8% 2.0 3-4 11.5% 4.5+ 4-5 22.3% 4.5 4-5 23.7% 3.0 5-6 28.7% 2.25 5-6 20.7% 2.25 6-7 28.2% 1.5 6-7 20.3% 3.25 Spring Valley Construction I.,aborat~-'~s'-['l~ Dallas, Texas Figure 2 Stont~kigb At Rivercimse 006~2-21 -- · Coppdl, Texas 10/11100 AB~OlUrnONIWEI.LTESTDATA BORIN~ k'~... -. - ...... 7 7 8 8 9 9 10 10 DEl/RI, FT' ........ 2-3 4-5 2-3 5-6 0-1 6-7 2-3 5-6 DRY UNIT WBI(iHT, PCF .. 113 108 112 101 104 104 112 99 INITIAL MOI~'URE CONTENT, %...-- 18.5 16.1 17.7 21.0 18.6 20.9 17.3 26.2 FINAL ~ CONTENT, I(, ...... 19.2 17.6 20.3 26.8 21.8 22.2 18.3 27.8 ~--."~:-t, .~ FREE ~ ~ .... 0.1 0.1 0.2 0.3 0.7 0.1 0.3 0.1 BOI~INQ NO ..... 11 11 12 12 13 13 14 14 ~ FI' ..... 1-2 5-6 1-2 5.6 2-3 5-6 2-3 5-6 DRY UNIT 'W~QI,IT, IN~ .......... 106 107 ~8 08 107 99 111 104 Iq. AIll~ LIMIT, % .--. INnlAI. llOIl'nJRE CONTENT, %.--.. 15.1 18.0 24.2 24.0 17.0 22.7 12.7 22.0 RNAL ~ (~ONIINT, % .... 17.0 19.7 28.7 27.4 20.7 272 16.5 23.1 ~ FREE ~, ......... 0.1 0.1 1.1 1.5 0.3 0.9 0.0 0.5 BORIM]I IICI. . . 16 15 16 16 17 17 16 16 : DEPTH, liT. .. _. 3-4 6-7 1-2 4-5 1-2 5-6 2-3 6-7 IN~Y UNIT ,~QHT, IIICF ...... 107 106 104 101 106 118 119 08 INIIIAL IJOll'TtJRE CONTENT, %. .... 19.7 21.7 20.7 23.6 20.2 13.8 12.9 19.3 FIML IKNITtJRE CONTENT, % .-- 21.5 24.3 23.1 27.2 21.2 15.8 14.5 26.5 I~R(~NT FREE ~ i . _ 0.2 0.2 0.5 0.7 0.7 0.6 0.1 1.4 BONIN~ Ill]. . 19 19 20 20 21 21 22 22 ~ FT... 3-4 6-7 2-3 5-6 2-3 5-6 1-2 5-6 DNY IMIT ~/~HT, I~F e? 26 104 t1~ 116 104 108 04 LJ~JlD I. IIT0 % ----.-- FI.AIT~ LILT, % .... FU4Tm~Y~~ ..... INIllIM. lIOlITUIIE CONTENT, 1(k-- 22.1 23.8 18.6 14.0 14.7 20.7 14.6 28.7 FIML IIOII'TURE CONTENT, % ~ 26.1 27.8 26.6 17.6 17.1 21.9 27.2 29.7 I~R~ENT ~ ~ I 0.5 0.6 0.3 0.1 0.9 0.8 3.0 0.6