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An employee owned company <br /> SPECTRUM EXPLORATION, INC. <br /> 2365 Wigwam Drive <br /> Stockton,CA 95205 <br /> (209)465-8712 <br /> October 6, 1997 (209)465-8773 FAX <br /> PAYMENT <br /> San Joaquin County Public Health Services RFr`FE1"Fr, <br /> Attn: Mike Infurna OCT 0 9 1997 <br /> P.O. Box 2009 <br /> Stockton, Ca 95201 PUBLIC HEALTH SERVICES <br /> ENVIRONMENTAL HEALTH CiVIS C7 u <br /> Subject: 188 Frank West Circle Well Abandonment <br /> Dear Mike: <br /> Spectrum has been contracted by Station West Investors to pressure grout (3) monitoring wells at <br /> the address above. <br /> Our pressure grouting technique begins by installing tremie pipe inside the well casing and running <br /> it to the bottom of the well. Grout is then pumped from the bottom of the casing to the surface <br /> displacing any water that may be present in the well. The tremie pipe is then pulled from the well <br /> and a pressure grouting devise is sealed to the top of the well casing with the weight of the drill rig. <br /> The grout is then pumped through the sealing devise allowing it to be forced through the screened <br /> interval of the well and into the filter pack. Our pumps are capable of creating 50 to 100 PSI which <br /> is more than sufficient for this task. <br /> After the pressure grouting is complete, the top 3-5 feet will be drilled out to the original boring <br /> diameter and topped off with additional grout forming a mushroom cap. <br /> Please call me if you have any questions regarding this procedure. Also, call me when this permit <br /> has been approved at 209/465-8712. <br /> Sincerely, <br /> CTRUM EXPLORATION, INC. <br /> Jim Kleinfelder <br /> Manager <br />