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dilute chlorine solution. Contaminated sand filter shall not be used. It is not anticipated that <br /> gravel/sand filter will be required to be chlorinated prior to introducing to the well. <br /> 2.4 SOIL SAMPLING INTERVALS AND LOGGING METHODS <br /> During drilling,a 2-inch diameter split-spoon sampler will be used to collect undisturbed soil samples <br /> at every 5-foot interval or at observed changes in soil characteristics,for soil classification according to <br /> the Unified Soil Classification System. Steel sampling tubes will be cleaned and reused as <br /> construction progresses. Standard penetration tests(number of blows of a 140 lb.weight to advance <br /> the sample tube 6 inches)will also be taken at each 5-foot depth interval. Well <br /> destruction/construction activity monitoring and well-logging will be performed by: <br /> Richard E.Toy <br /> Kjeldsen,Sinnock,Neudeck, Inc. <br /> 1355 Halyard Drive, Suite 100 <br /> West Sacramento,CA 95691 <br /> Phone:916-403-5900 <br /> under the supervision of Neal Colwell,Professional Engineer's License C-59437. Soil classification <br /> and penetration data will be reported on standard boring log diagrams. <br /> July 2015 Conformed mth 21 October 2015 Conditional Approval 8 MW-5 Replacement <br /> City of Riverbank WWTF Monitoring Well Installation Workplan <br />