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Date: <br />USCS Soil Classification: <br />Infiltration Rate Calculation: <br />minutes <br />inches <br />inches <br />inches <br />inches <br />625 CYPRESS AVENUE <br />SANTA ANA, CALIFORNIA <br />DRAFTED BY: ACS CHECKED BY: JTA APRIL 2024 PROJECT NO. W1895-88-01 FIG. 19 <br />Total Depth of Test Hole, Dt = 300 <br />Infiltration Rate, It = 0.02 inches/hour <br />PERCOLATION TEST RESULTS AND CALCULATIONS <br />ENVIRONMENTAL GEOTECHNICAL MATERIALS <br />2807 MCGAW AVENUE - IRVINE, CALIFORNIA, 92614 <br />PHONE: 949-491-6570 <br />Initial Depth to Water, D0 = 180.7 Havg = 119.0 inches <br />Test Hole Radius, r = 4 ΔH = 0.5 inche <br />Final Depth to Water, D = 181.2 H = 118.8 inche <br />Time Interval, Δt = 30.00 Ho = 119.3 inches <br />8 <br />7 <br />6 <br />180.7 <br />5 <br />4 <br />Df <br />Final Depth <br />to Water <br />(in) <br />3 10:25 AM 10:55 AM 30.00 180.7 <br />2 9:55 AM 10:25 AM 30.00 180.2 <br />181.2 0.5 62.50 <br />0.5 62.50 <br />*If two consecutive measurements show that six inches of water seeps away in less than 25 minutes, the test shall be run for <br />an additional hour with measurements, taken every 10 minutes. Otherwise, pre-soak (fill) overnight. Obtain at least twelve <br />measurements per hole over at least six hours (approximately 30 minute intervals) with a precision of at least 0.25". <br />no <br />1 9:25 AM 9:55 AM 30.00 179.9 <br />Trial No. Start Time End Time <br />Δt <br />Time <br />Interval <br />(min) <br />0 <br />Initial <br />Depth to <br />Water <br />(in) <br />180.2 0.4 83.33 <br />ΔD <br />Change in <br />Water Level <br />(in) <br />Percolation Rate <br />(min/in) <br />2 9:00 AM 9:25 AM 25 179.4 179.9 <br />1 8:30 AM 8:55 AM 25 179.0 179.4 0.4 <br />0.5 no <br />Trial No. Start Time End Time <br />Δt <br />Time <br />Interval <br />(min) <br />D0 <br />Initial Depth to <br />Water <br />(in) <br />Df <br />Final Depth <br />to Water <br />(in) <br />ΔD <br />Change in <br />Water Level <br />(in) <br />Greater <br />than or <br />Equal to <br />6"? <br />(y/n) <br />Diameter (if round) = 8 Sides (if rectangular) = ---- <br />PERCOLATION TEST DATA SHEE <br />Project:625 Cypress Avenu Project No.:W1895-88-01 Tuesday, March 5, 2024 <br />Sandy Soil Criteria Test* <br />Test Hole Dimensions (inches)Length Width <br />Test Hole No.:B2 Tested By:JC <br />Depth of Test Hole, DT:25 Sandy Silt (ML) <br />𝐼∆ <br />∆