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Kennedy/Jenks Consultants <br /> 3. Make volumetric calculations prior to grouting, to estimate the total volume of grout required to <br /> fill the annular space. The amount of grout actually used must be compared with this estimate. <br /> Ensure that the grout meets the following specifications: <br /> a. Volumes of grout used must be within 10 percent of estimated value. <br /> b. The grout consists of ASTM C150 Type II cement and water at a ratio of 5 gallons of water <br /> per 94 Ib sack of cement, weighing approximately 118 lbs per foot. Approximately 5 Ib of <br /> powdered bentonite for each sack of cement is mixed into the grout. <br /> 4. Note that leakage tests or a bond log might be required to validate the grout seal. <br /> 5. Grout conductor casing into place by one of the following methods: <br /> a. Pressure-grout from the bottom of the casing, using a packer or Braden-head to force the <br /> grout into the annular space between the conductor casing and the borehole wall. <br /> b. Fill the casing with grout and use a spacer plug apparatus to force the grout into the annular <br /> space between the conductor casing and the borehole wall. The spacer plug must be <br /> composed of a material that can be left in the boring and later drilled through to complete it. <br /> 6. After allowing the grout to set, continue drilling with an appropriate diameter hollow stem auger. <br /> A rotary bit can be used initially to drill through any grout that might have hardened in, or directly <br /> below, the casing. <br /> 1.5 Equipment Cleaning <br /> 1. Prior to drilling each boring, steamclean downhole equipment (augers, well casing, sampler). <br /> 2. Before collection of each drilling sample, wash sampling equipment (sampler and brass liners) <br /> with a brush, in a solution of high purity phosphate-free soap and potable water. Rinse the <br /> equipment with potable water. <br /> 3. Before leaving the site at completion of drilling, steamclean downhole equipment and vehicles <br /> that require cleaning. <br /> 1.6 Investigation-Derived Residuals <br /> Place soil cuttings and other residuals in appropriately labeled containers for disposition by the <br /> client. All soil samples transported to the laboratory must be returned to the client for disposition. <br /> Kennedy/Jenks Consultants is available to assist the client with options for disposition of residuals. <br /> Monitoring Well Installation Work Plan SOG 1 <br /> Delicato Family Vineyards, Manteca, California Page 3 <br /> pb➢yrdrplaCminy'oM0710765001.�Aefiulo109+phNwhstM wA pMVpperMh alf sub ffsoikemp.dX <br />