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HomeMy WebLinkAboutBackflow Device Test Report 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 r Test#2—Garage North Footing (Approx. 12' East of Test#1) DCP Depth Per Blow Avg. /N-Value Estimated Load 575 MM (22.6°) 39.5 MM/ N—7.75 2875 PSF Test#3—Garage North Footing (Approaching Northeast Comer) DCP Depth Per Blow Avg. /N-Value Estimated Load 310 MM (12.2") 31.6 MM/N—10 3500 PSF Based upon our observations and test results, it is recommended that the footing area represented by DCP test#1 be configured as a 24"wide design (reinforcement optional).This should include, approximately the west 20' section of the north footing line. In our opinion,with the noted recommendation,the observed and tested sub-grade soils are acceptable for footing placement, meeting an assumed bearing capacity requirement of 2000 PSF. Our observations and subsequent soil evaluation on this date is limited in scope to soil conditions observed within the footing excavations, and to the depths achieved by shallow probes and dynamic cone penetrometer tests.Therefore,we are unable to assess sub-grade soils, which may be encountered by borings conducted as part of a standard subsurface geotechnical investigation. Sincerely, Itco Allied Engineering Company Reviewed By: Gary Standish Robert P. Sullentrop, P.E. Senior Inspector Minnesota Reg.#17823 Cc: City of Long Lake Building Inspections #701 - 1 /#605—1 /#614—1%/#610—'/l#304- (3) DCP/#612—50% Arno 41-so-200- LIWIO BACKFLOW'DEVICE TEST REPORT Service Address 450 C7 VJi f ov4 l r^ 0-rV12(2 Name of Premises._ I'I } ua �a r) Location of device~ s Device 1�d bei/2? 3 a'-I—a 11� MQ" SMai Number Test Kit MamFacarer SSW unbar : Date OWMW RP ❑ DC ❑ DCDA ❑ RPDA ❑ Reduced Pressure Principle Assernbl - ;,.. Relief Valve Check Valve#2 Check Va;e-#1 No.2 Shifioff Check Valve#2 Opening Point Backpressure Test Valve Opened at psid Closed Tight ❑ Heid at _,Vsid `Closed'fight ❑ Held at psid Leaked 11Leaked ❑ Leaked ❑ Did not open ElLeaked.� ❑ Double Check Valve Aaserly Backflow Assembix status Check Valve#2 Check Valve 91 140.2'sfiutoff Check Valve ilk Backpressure Test VON* Passed R Closed Tight © Held at psid ' Closed Tight ❑ Held at psid Failed 0 Leaked ❑ Leaked i Leaked © Leaked ❑ Time �- 2(a Certified Tester# A -15 - Test by(Signature) print Name of Your signature certifies that all info anon provided on this section is correct. Comments: I_J Certificate of Completion Duct Sealing Performed For: 250 i Norson, Builders 500 Willow Dr Orono, MN 55358 200 CL Overall Sealing Results 150 4 m When we arrived, 100 YOUR DUCTS HAD: U- 235.8 CFM of Leakage, equivalent to a 44.5 Square Inch Hole 5o This equals 141.5 refrigerators full of air loss e very hour After we finished, 0 YOUR DUCTS HAVE: 0 5 10 15 20 25 30 35 21.3 CFM of Leakage, equivalent to a Sealing rmeinMinutes 4.0 Square Inch Hole Aeroseal Technician Scott This corresponds to a 91 .0% Reduction in Aeroseal Case ID 4029 Duct Leakage. Date of Seal 3/17/2017 Note: Duct Leakage results are calculated in Cubic System Description System 1 Feet per Minute (CFM) measured at a standard OPERATING PRESSURE of 25 Pa. Seal Description Seal return Hardware HomeSeal AERLIEAL. Duct Sealing Performed By: Eruct Sealing From The Inside Central Minnesota Aeroseal 9145 County Rd 17 Delano, MN 55328 Phone: 763-742-0988