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October 25, 2015 <br /> YMCA - Everett <br /> L&A Job No. 15-089 <br /> Page 17 <br /> Cleanouts <br /> Sufficient number of cleanouts at strategic locations should be provided for underground <br /> drain lines. The underground drain lines should be cleaned and maintained periodically to <br /> prevent clogging. <br /> ONSITE STORMWATER DISPOSAL <br /> Soil Particle Distribution Test <br /> Four soil samples, one from each of Test Pits 2, 4, 7 and 10, were obtained from the targeted <br /> advance outwash deposit and taken to HWA laboratory for Soil Particle Size Distribution <br /> test to determine their infiltration rates. These soil samples are listed in the table below and <br /> their test report is presented on Plates A 1-1 and A 1-2. <br /> LIST OF SOIL SAMPLES <br /> Sample Test Pit Depth Soil <br /> No. No. feet Description <br /> 1 TP-2 4.0 - 5.0 Dark yellowish-brown, poorly graded SAND with gravel <br /> 2 TP-4 6.0 - 7.0 Dark yellowish-brown, poorly graded SAND with silt & gravel <br /> 3 TP-7 7.5 - 8.5 Dark yellowish-brown, poorly graded SAND with silt& gravel <br /> 4 TP-10 4.0 - 5.0 Grayish-brown, poorly grade sand <br /> The percentages of clay, silt and sand/gravel of the soil samples determined from the <br /> particle size distribution tests are summarized on Plates Al-1 and Al-2. Based on these <br /> percentages the soil samples were classified according to the USDA (U.S. Department of <br /> LIU & ASSOCIATES, INC. <br />