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Gunner Sub-LR 990122 (2)Client: [ngineering Ce. 9200 King Arthur Drive Dallas, Texas 75247-3610 Phone 214/631-4372 Fax 214/631-4380 Mr. Mark Mords EPI Property Developement 14990 Landmark Blvd., Suite 300 Dallas, Texas 75240-6729 Jan. 18, 1999 ST Job No. 1598-0018 Report No. 95/8948 Test Method: ASTM C 42 ASTM C 39 Project: St. Marin Apartments Copp~e, II, Texas COMPRESSIVE STRENGTH OF CONCRETE CORES Cored on: 01/14/99 CaPped Max. Comp. Corrected Core Test Length Diameter Area L/D Correctior Load Str. Strength Average Number Date ~i.n .). (in.), (sq.in.~, Ratio Factor (lbs.) ~.'~, (pst') (ps~ 1-A 01/18/99 6.4 3.65 10.46 1.75 0.97 43,150 4120 4000 1-B 01/18/99 6.5 ,3.65 10.46 1.78 0.98 .37,000 3540 3470 1-C 01/18/99 6.6 3.65 10.46 1.86 0.99 53,000 5070 5020 4160 2-^ 01~18/99 5.9 3.65 10.46 1.62 0.97 45,300 4330 4200 , 2-B 01/18/99 4.7 3.65 10.46 1.29 0.93 38,300 3,~0 3400 .27C 01/18/99 7.6 3.65 10.46 2.08 1.00 40,500. 3870 3870 3820 3-A 01/18/99 6.3 3.65 10.46 1.73 0.98 50,200 4800 4700 3-8 01/1,8/99 6.1 3.65 10.46 . ,1.67 0.97 50,3,00 4810 4670 3-C 01/18/99 6.1 3~65 10.46 1.67 0.97 45~_~00 4320 4190 4520 Locations: Core No's l-A, 1-B & 1-C - Paving, 40' west; 45' south of southeast comer of bldg. no. 7. Corn No's 2-A, 2-B 8, 2-C - Paving, 20' south of southwest comer of bldg. no. 7. Core No's 3-A, 3-B & 3-C - Paving, 20' north; 80' east of northeast comer of Clubhouse. Notes: (1) Core No's l-A, 1-B & 1-C taken to prove out concrete placed on 09118/98; report no. 66, lab. no. 7800 (2) Core No's 2-A, 2-B & 2-C taken to prove out concrete placed on 09/18/98; report no. 66, lab. no. 7799 (3) Corn No's 3-A, 3-B & 3-C taken to prove out concrete placed on 09/01/98; report no. 58, lab. no. 7665 (4) All cores were cured by soaking in lime saturated water for 40 hours prior to testing. cc: City of Coppell - Garreth Campbell EPI - Don Matlock (FAX) MFC Construction - Dick Dennie AECC, Inc. - Mark Gottschlat