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IT AL HElti LTH <br /> An employee owned company <br /> SR"XI, <br /> 35 NOV 10 PM 2` 30 <br /> November 8, 1995 <br /> San Joaquin County Public Health Services <br /> Attn: Linda Turkatte <br /> P.O. Box 2009 <br /> Stockton, Ca 95201 <br /> Dear Linda: <br /> a <br /> A.,Teichert & Son, Inc has retained Spectrum Exploration, Inc. to pressure grout (3) wells"and <br /> drill out (1) well located,at 103-N. E Street, Stockton, California. <br /> Our pressure .grouting technique begins by installing tremie pipe inside the well casing and <br /> running it to the bottom of the well.'.Grout is then pumped from the bottom of the casing to the <br /> surface displacing any water that may be present in the well. The tremie pipe:is then-pulled from <br /> the.well and a pressure grouting devise is sealed .to the top of the'well casing with the weight <br /> of the drill rig. 'The grout is then pumped through the-sealing devise allowing it to be forced <br /> through the screened interval of the well and into the filter pack. Our pumps are capable of <br /> creating 50 to 100 PSI which is more than sufficient for this task. <br /> We will be pressure grouting MW-3, MW-4 and MW-5. <br /> Drilling out MW-1.will be accomplished by over drilling the 2 inch pvc casing with 8 inch <br /> hollow stem augers to the total depth of.the well. The open bore hole is-then back filled with <br /> a cement/bentonite grout from the bottom of the boring.to.the surface through a tremie pipe. <br /> n Please call me if you have any questions regarding this procedure. Also, call me when this `- <br /> pe iit has been approved at 2091465-8112. <br /> Sincerely, <br /> SPECTRUM EXPLORATION, INC. <br /> e <br /> Jim Kleinfelder <br /> MANAGER <br /> Spectrum Exploration,Inc. 2365 Wigwam Drive 209.465.8712 tel <br /> Stockton,California 209.465.8773 fax <br /> II 95205 <br />