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ENGEO1 <br /> GEOTECHNICAL AND ENVIRONMENTAL CONSULTANTS <br /> I N C O R P O R A T E D MATERIALS TESTING <br /> Project No. <br /> 4545.2.002.03 <br /> September 22, 1999 <br /> Mr. Doug Nazarenus <br /> Ryland Homes <br /> 12647 Alcosta Blvd, Suite 190 <br /> San Ramon, CA 94583 <br /> Subject: Ryland Junction—Tract 2384 o5. <br /> Tracy Boulevard and Tcnnis Lane <br /> Tracy, California <br /> MONITORING WELL DESTRUCTION <br /> Dear Mr. Nazarenus: <br /> At your request and with your authorization, we provided observation services during the <br /> destruction of four monitoring wells at the northeast portion of Ryland Junction located in Tracy, <br /> California. The purpose of our services was to confirm that the well destruction was accomplished <br /> in general conformance with the requirements of San Joaquin County Environmental Health <br /> Department. <br /> The four monitoring wells were abandoned on October 22 and 25, 1999, by removing debris and <br /> materials from the well casing by displacing them with compressed air; overdrilling the well casings <br /> using hollow stem augers for the full well depth, and backfilling the resulting boring with neat <br /> cement. <br /> A San Joaquin County Environmental Health Inspector also conducted site visits and observed most <br /> of the well abandonment. He appeared satisfied with the procedures and well abandonment. Based <br /> on our observations, it is our opinion that the well destruction was accomplished in general <br /> conformance with the requirements of San Joaquin County Environmental Health Department. <br /> If you have any questions regarding the contents of this letter,please do not hesitate to contact us. <br /> Very truly yours, <br /> ENGEO INCORPORATED Reviewed by: <br /> Casey Lee Jensen Duncan R. Hic tt, CEG <br /> clj/jd:well <br /> cc: 1 —Mr. Michael J. Infurna, Jr., R.E.H.S. —Public Health Services, San Joaquin County <br /> 2401 Crow Canyon Road • Suite 200• San Ramon,CA 94583-1545 • (925)838-1600 • Fax(925)838-7425 <br /> www.engeo.com • E-mail:engstaffCLengeo.com <br />