1601 FLORIDA DR Geotech Report 2022-10-25

r , 3.2 Calculate the infiltration rate for each 15-minute interval (change in depth at each interval x 4) and record the results in the table below. Time of * Depth to Infiltration Measure Water vel Rate (15-min. interval} (inchesLe) (in/hr) ( 8: Zi 5-WS t�$ :3‘ (o-W 3, I$: 5 f -7/ ca 8 2,© t4:4P6 z. (Q: z I '-r./S Z. 4. Check for high groundwater/immediate groundwater mounding: 4.1 Within 24 hours after the falling head period, excavate the botto •w•f the pit. 4.2 Is standing water or seepage visible in excavated hole? (Yes No) 4.3 If yes", record depth : ft. 5. Data Analysis/"Measured Infiltration Rate"Selection (use the falling head data to confirm the measured infiltration rate calculated from the steady-state data): 5.1 Steady-state measured infiltration rate: Provide the lowest infiltration rate from steady- state table above: Z.6q in/hr. 5.2 Select"Measured Infiltration Rate": Z a 0 in/hr 5.3 If the lowest measured infiltration rate is less than the minimum rate associated with an infiltration BMP, that BMP cannot be used. 5.4 If the measured infiltration rate is less than all minimum infiltration rates for infiltration BMPs, no further investigation is required. 6. Calculate "Design Infiltration Rate": The design infiltration rate shall be calculated by applying the appropriate correction factor to the above measured infiltration rate. 6.1 Select a correction factor. Site variability and number of locations tested, CF„= b.45 Uncertainty of test method, CFt= 0.5 Degree of influent control to prevent siltation and bio-buildup, CFm = Total correction factor= CFv x CFt x CFm = ©. 2 6.2 Calculate the Design Infiltration Rate below: Design Infiltration Rate = 4.2' x 2.cs = p,55 in/hr Infiltration Test performed by: Print Name ,4. 5. kJ Signature _,. Date $/z3/2o11 Company i -tU 45sOcad►4ec, vtc..