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Home My WebLink AboutSUB200600072 Assessment - Environmental 2007-09-24 DIGS, INC P O Box 31 Charlottesville, VA 22902 mewl Phone•804-978-4435 Fax 804-978-3703 September 21, 2007 County of Albemarle Attn: Greg Cooley 401 McIntire Road Charlottesville, VA 22902 Re: Creekside Phase III Dear Greg: Please find enclosed one (1) copy of the CBR Test results for the above referenced project. We trust this is the information that you need. Please contact us with any questions. Sincerely, -jCJfv- V, Gretchen V. Wood Office Manger Enclosed John E Gooch, RE. ®®cj'l Steve Gooch, C.P.G./A.O.S.E. Phone (434) 293-7449 Fax a "tZYI Fax (434) 293-5137 1821 Broadway Street Charlottesville, Virginia 22902 wwwgooch-eng.coin September 18, 2007 Mr. Mac VanderPloeg Digs, Inc. 1030 Linden Avenue Charlottesville,VA 22902 Re: CBR Tests Creekside Mount Vista Lane Sta.18+75 Welbourne Lane Sta. 26+00 Albemarle County JOB CODE: 2625 Dear Mac: Enclosed are the results of two (2) CBR tests we recently ran on soil samples from the referenced site. We have enclosed the moisture-density (compaction) curves, the sieve analysis results, and the stress-strain curves. Our personnel performed sampling in the field. We trust this is the information you need. If there are any questions,please let us know. Sincerely: Gooch Engineering &Testing, Inc. Steve Gooch Encl. Cp.° o c h CBR TEST REPORT 1821 Broadway Street 72 g l n e e r Z i g Charlottesville, VA 22902 Phone 434-293-7449 tV7 e s t i n g , In C. FAX 434-293-5137 Date. 9/13/07 By. HPP Project. Creekside Job No.: 2625 Sample. Locat.. Mount Vista Lane Sta 18+75 Description: Red silt AASHO T-99 X Max. Dry Dens. 95.3 pcf , Opt. Moisture 23.0 AASHO T-180 Cylinder No. 1 Cylinder Ht. 4.584 in. Cylinder Vol 0 0744 cu.ft. Cylinder Wt. 9 31 Hammer Wt. 5.5 lb No. Lifts 3 Blows/lift 50 Surcharge Wt 10 lb. DENSITY AND MOISTURE DATA As Compacted After Soaking Can No. Al A2 A27 A28 Wt. wet sample + can, gm. 68.47 68.45 68.55 68.45 Wt. dry sample + can, gm. 59.78 59.57 59.04 58.97 Wt. water, gm. 8.69 8.88 9.51 9.48 Wt. can, gm. 21 25 21.02 21.25 21 02 Wt. dry soil, gm. 38.53 38 55 37.79 37.95 Percent moisture 22.55 22.8 23.04 25.17 25.1 24.98 Wt. mold +wet soil, lb. 18.16 18.38 Wt. wet soil, lb. 8.85 9.07 Wet density of soil, pcf. 118.95 121.67 Dry density of soil, pcf. 96.87 97.28 Percent max. lab density 101.6 102.1 PENETRATION DATA SWELL DATA Penetration Load in. lb. Dial reading before soaking 0 121 in 0.000 0 Dial reading after soaking 0.13 in 0.025 270 Swell 0 009 in 0.050 395 Percent Swell 0.20 % 0.075 475 Volume after soaking 0.0745 cu. ft. 0.100 540 0.150 640 0.200 715 CBR= 100(540/3000) = 18.0 0.300 830 0.400 920 0.500 995 Creekside Mount Vista Lane 1200 Sta. 18+75 1000 • 800 ♦ V 0 600 -J 400 200 0 I I 0 0.1 0 2 0.3 0.4 0.5 0.6 Penetration Creekside Mount Vista Lane Sta 18+75 97 0 96.0 - 95.0 - 94.0 93.0 F"4 (4 92 0 91.0 • 90.0 89 0 88.0 87 0 86.0 85.0 17 0 18 0 19.0 20.0 21.0 22.0 23.0 24.0 25 0 %MOISTURE SIEVE ANALYSIS REPORT Creekside Mount Vista Lane Sta. 18+75 Sieve Cumulative %Passing 3/q 100 4 100 10 95.8 40 84.9 200 74.5 ATTERBERG LIMITS Liquid Limit 44.1 Plastic Limit 28.3 Plasticity Index 15.8 77 CBR TEST REPORT /"G Cpo O C 1821 Broadway Street n g i n e e Y' i n g Charlottesville,VA 22902 Phone 434-293-7449 C e s t i n g , I n C. FAX 434-293-5137 Date: 9/13/07 By. HPP Project Creekside Job No.: 2625 Sample: Locat.. Welbourne Lane Sta 26+00 Description. Brown sandy silt AASHO T-99 X Max. Dry Dens. 99 6 pcf., Opt. Moisture 18.3 AASHO T-180 Cylinder No. 2 Cylinder Ht. 4.584 in Cylinder Vol. 0.0744 cu.ft. Cylinder Wt. 9.31 Hammer Wt. 5 5 lb No. Lifts 3 Blows/lift 50 Surcharge Wt. 10 lb. DENSITY AND MOISTURE DATA As Compacted After Soaking Can No. A3 A4 A29 A30 Wt. wet sample+ can, gm. 68 56 68.51 68.72 68.60 Wt. dry sample + can, gm. 61.22 61 33 59.73 59.82 Wt.water, gm. 7.34 7 18 8.99 8.78 Wt. can, gm. 20.97 20.81 21.42 21 74 Wt. dry soil, gm 40.25 40.52 38.31 38.08 Percent moisture 18.24 18 0 17.72 23.47 23.3 23.06 Wt. mold +wet soil, lb. 17.98 18.47 Wt. wet soil, lb. 8.67 9.16 Wet density of soil, pcf. 116.53 122 00 Dry density of soil, pcf. 98 77 98.98 Percent max. lab density 99.2 99.4 PENETRATION DATA SWELL DATA Penetration Load in. lb. Dial reading before soaking 0.027 in 0.000 0 Dial reading after soaking 0 069 in 0 025 80 Swell 0.042 in 0.050 135 Percent Swell 0.92 % 0.075 190 Volume after soaking 0 0751 cu. ft. 0.100 240 0.150 325 0.200 390 CBR= 100(240/3000) = 8.0 0.300 500 0 400 590 0.500 680 Creekside Welbourne Lane Sta. 26+00 800 - 700 . 600 500 400 J 300 200 100 0 < 0 0 1 0.2 0.3 0.4 0.5 0.6 Penetration Creekside Welbourne Lane Sta 26+00 99.0 98 0 97.0 - H al 96 0 a H q 95.0 94 0 93 0 92.0 1 0 160 17.0 18.0 19.0 200 21.0 22.0 23 0 %MOISTURE heOrt}. �� ✓ln5 avo4 /Me•'sFarz `-- (r)(irct '✓1 / 70 n,`F2, s�zt.E�� l7 ra�vi,�y 2 . SIEVE ANALYSIS REPORT Creekside Welbaurne Lane Sta. 26+00 Sieve Cumulative%Passing V4 100 4 96.3 10 88.1 40 75.1 200 62.9 ATTERBERG LIMITS Liquid Limit 39.7 Plastic Limit 30.5 Plasticity Index 9.2