Backflow Device Test Report - Laserfiche WebLink

Home Browse Search

ITCO ALLIED ENGINEERING CO. AN ALLIANCE OF INSTANT TESTING COMPANY AND ALLIED TEST DRILLING Jobsite and Laboratory Testing, Geotechnical Services, Commercial, Residential and Municipal 7125 West 126th Street, Suite#500-Savage, MN 55378 Telephone: (952)890-7366 Fax: (952)890-5883 September 29, 2017 Final Grade, Inc. 3441 —Bluff Drive Phone: 952-492-5100 Jordan, Minnesota 55352—8304 Fax: 952-492-5101 RE: 500 Willow Drive South Long Lake, Hennepin County, Minnesota As requested, site visit was made on September 29, 2017 at 10:20 A.M.to evaluate reported dark questionable soils within the garage area of a single family residence under construction. Our surficial geology reference indicates that the lot lies within a region of(dt)soils, typically loamy till,which may include small areas of thick,fine, loamy colluvium. The referenced soils are generally acceptable for construction, if within prescribed limits of consolidation and moisture. At the time of the inspection, the house footings had been poured,with the garage footing forms set at 20"for the pending our. Soils consisted of a damp,tan lean clay.To assess the strength of the subgrade soil, a 5/8 inch diameter smooth probe was used to penetrate the footing lines at random. With full body weight applied,the probes indicated penetration consistent with soils of acceptable strength, although slightly lower strength soils were noted within the west section of the footing near a dark patch of soil.To further evaluate the referenced dark soils, a 1 5/8'"inch diameter fluted hand auger was put down, extracting a thin zone of horizon "B" material with no detectable organic content. The load bearing capacity of the soil was evaluated by a dynamic cone penetrometer tests conducted at random, or locations indicating an increase in probe penetration along the north footing.The dynamic cone penetrometer(DCP), employs an eight kilogram (17.6 pound) hammer to drive a 20 millimeter diameter conical point into the soil,with the penetration recorded in millimeters per blow. From the DCP readings, a per blow, penetration average was recorded and an N-value derived.This N-value is an empirical relationship we have established to equate the dynamic cone data to the more familiar blows per foot(BPF)standard penetration soil boring test Test#1 —Garage North Footing (Approx. 8' From Northwest Corner) DCP Depth Per Blow Avg. /N-Value Estimated Load 1045 MM (41.0") 73.9 MM/N —4.1 1375 PSF