Laserfiche WebLink
0E11 NEIL O. ANC :SON & ASSOC., INC.GEOTECHNICAL SERtVICES-ENGINEERING LABORATORIES 22 N Houston Ln <br /> Lodi, California 95240 <br /> Lodi (209) 367-3701 <br /> Stockton (209) 472-1091 <br /> FAX: (209) 333-8303 <br /> September 10, 1998 <br /> Attn. Elwyn Heinen Q <br /> Advanced Design Group, Inc. 4- <br /> 1120 Sixth Street <br /> Modesto, CA 95354-2203 <br /> Subject: Percolation Test <br /> Rivercrest Vineyard, Inc. <br /> 18700 E. River Rd. <br /> Ripon, California <br /> Our Job #: S98100 <br /> Gentlemen: <br /> Per your request we have completed performing a percolation test at the subject project. It <br /> is our understanding that the percolation test is to aid in the design of a proposed leach field system <br /> at the subject project. This letter and attachments present the results of our tests. <br /> L The percolation test was performed by an engineer from our office. The test hole(PT-1)was <br /> located in the area of the proposed leach line system at the southeast corner of the lot. A 48-inch <br /> profile hole 1.was excavated with a hand auger. The profile hole was logged by-an engineer and a <br /> description of the soils encountered is presented on the attached Log of Test Hole Sheet located in <br /> the appendix. The surface soil consisted of a fine to medium sand which was underlain by a fine to <br /> medium sand with silt continuing to the maximum depth explored. For a detailed description of the <br /> soils encountered refer to the log of test hole. <br /> A shallow percolation test extending to a depth of 36 inches was performed adjacent to the <br /> profile hole. A 4.0 inch diameter test hole was excavated and 2 inches of gravel was placed in the <br /> bottom of the hole. A two-inch diameter perforated pipe was then placed and backfilled with gravel. <br /> The test hole was filled with water 24 hours prior to running the test. The last half hour of the test <br /> readings were witnessed by a county health official and the test data obtained is enclosed in the <br /> appendix. The percolation rates have been adjusted to account for the pipe and the gravel backfill. <br /> Calculations for this adjustment is on the test data sheet located in the appendix. <br />