1976-05-10 Septic System Design Report

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I p�e�on�DAUG 4 1976 VILLAGE CE ORONO r SOIL TESTING SERVICES OF MINNESOTA. INC. 2405 ANNAPOLIS LANE SUITE 280 MINNEAPOLIS, MINNESOTA 55441 612-559-1900 August 2, 1976 Mr. James Hanson 616 East Park Street Wayzata, Minnesota 55391 Ct884 Re: Compaction Test for Residence to 8e Located Dakota Avenue in Orono, Minnesota. STS Job No. 90739-A Dear Sir: On July 30, 1976, Mr. Philip S. Stoffey of Soil Testing Services of Minnesota went to the above referenced site and performed 5 cone penetrometer tests in the southeast corner of the excavation (see location sketch). Approximately 4 feet of medium to coarse sand mixed with traces of fine to coarse gravel had been placed in that area, The results of these tests are included in this report. The Con- tractor, who placed the fill, used a vibratory roller with a 30-inch drum to compact the s.-,d. Lifts were placed,at approximately 9-inch intervals. The cone penetrometer is a penetration device used in granular soils. A 30-inch rod with a cone -shaped tip is driven into granular soils by dropping a 10-pound weight 30 inches and recording the number of blows required to penetrate 1 foot. The cone penetrometer has been calibrated in various soils with other compaction -measuring devices. For the type of soil used at this location, at least 30 blows for 12 inches would indicate compaction to approximately 95% of the maximum Modified Proctor dry density (ASTM D-1557-70). After an initial seating of 6 inches which is necessary William C. Kwasny,P.E. CHICAGO. PEORIA, ILLINOIS • WASHINGTON, D.C. • ORLANDO, FLORIDA • CEDAR a EnginaoringAnalvsis;Reports John P. Gnaadingar, P.E. RAPIDS•IOWA CITY, DAVENPORT, DES MOINES, IOWA • WICHITA, KANSAS a SAY • Construction Ouality Control Clyde N. Baker, P.E. - CITY, DETROIT, GRAND RAPIDS, MAROUETTE, MICHIGAN 0 MINNEAPOLI , 9 Foundation Borings and Tasting