Laserfiche WebLink
KLE/NFELOER <br /> �Bright People.Right Solutions. <br /> 2.1.4 Percolation Testing <br /> Two percolation tests were performed by a representative from our firm on April 18, 2020 within <br /> the proposed bioswale areas at depths of approximately 3 and 5 feet below existing grade. The <br /> approximate locations of the test holes are shown on Figures 2 and 3. <br /> The percolation tests were performed following accepted regulatory guidelines, using relatively <br /> "clean" water. The test procedure calls for maintaining a head of water approximately 2 to 3 feet <br /> above the bottom of the test holes. Measurements of depth to groundwater are taken every 30 <br /> minutes for a period of at least 4 hours. The final test reading is used to calculate a percolation <br /> rate in gallons per square foot per day (gfd). The results of our percolation testing and <br /> recommendations for bioswales are presented in Section 5.10. <br /> 2.2 LABORATORY TESTING <br /> Kleinfelder performed laboratory tests on selected samples recovered from the explorations to <br /> evaluate their physical and engineering characteristics. The following laboratory tests were <br /> performed: <br /> • Unit Weight (ASTM D2937) <br /> • Moisture Content (ASTM D2216) <br /> • Atterberg Limits (ASTM D4318) <br /> • Percent Passing No. 200 Sieve (ASTM D1140) <br /> • Corrosion — Soluble Sulfate Content (CA DOT Test #417) — Performed by Sunland <br /> Analytical <br /> • Corrosion — Soluble Chloride Content (CA DOT Test #422) — Performed by Sunland <br /> Analytical <br /> • Corrosion — pH (CA DOT Test#643)— Performed by Sunland Analytical <br /> • Corrosion — Minimum Resistivity (CA DOT Test#643)— Performed by Sunland Analytical <br /> All laboratory test data are presented in Appendix B. The corrosion test results are also discussed <br /> in Section 5.12, Soil Corrosion. <br /> 20210067.001A/ST020R111447 Page 5 of 37 May 11, 2020 <br /> ©2020 Kleinfelder www.kleinfelder.com <br />