1601 FLORIDA DR Geotech Report 2022-10-25

September 10, 2017 Infiltration Tests L&A Job No. 17-095 Page 5 The infiltration test pits was excavated to about 20 to 24 inches deep, approximately the level of subgrade soils under the proposed access road, with their bottom excavated into the weathered deposit of brown, silty fine sand with trace to some gravel. Dimensions of the infiltration test pits and the soil condition at bottom of the pits are presented in the table below: TEST PIT SIZE AND SOIL CONDITION Test Pit Description of Soil No. Size at Bottom of Test Pit IT-1 3.58' x 4.86' Brown, silty fine SAND, X 1.67' deep some gravel IT-2 3.75' x 4.42' Brown, silty fine SAND, x 1.42' deep trace gravel Infiltration Test Procedure and Test Results The in-situ infiltration tests were conducted in accordance with the Small Pilot Test procedure outlined in Everett Stormwater Code. The infiltration test pits were first filled with water for several hours to soak the soils underneath the pits. Clear tap water was used in the tests. The infiltration tests were then conducted in accordance with the test procedure in the pits. The test results were presented in the APPENDIX attached to this report. A steel bar was placed across the top of the test pits and water levels from the steel bar were measured during the tests. LIU & ASSOCIATES, INC.