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6ETTLER - RYAN INC. <br /> Mazda 4, 1996 <br /> Mr. Brett Hunter <br /> Chevron USA Products Company <br /> P.O. Box 5004 <br /> San Ramon, California 94583 <br /> Subject: Letter Report for Well Abandonment at Former Signal Oil Service Station#221-5, 5431 <br /> West Grant Line Road, Banta, California. <br /> Mr. Hunter: <br /> At the request of Chevron USA Product Company (Chevron), Gettler-Ryan Inc. (G-R) abandoned three <br /> groundwater monitoring wells at the subject site(Figure 1). On March 4, 1996, G-R observed Bay Area <br /> Exploration, Inc. (C57 522125) abandon groundwater monitoring wells MW-1 through MW-3. The <br /> location of the former wells are shown on the attached Site Plan (Figure 2). The well abandonment <br /> permit issued by San Joaquin County Public Health Services (SJCPHS) is attached. <br /> Each 2-inch diameter well was pressure-grouted with neat cement to the total depth of the well with <br /> approximately 25 to 30 pounds per square inch (psi) of pressure applied at the top of each well for <br /> approximately 5 minutes. After pressure-grouting, each wellhead box was removed and the upper 2 feet <br /> of casing was overdrilled with 8-inch diameter hollow stem augers. The borehole was then grouted to <br /> surface grade with neat cement. All debris was removed from the site at the end of the well abandonment <br /> activities. Ms. Mary Meays of the SJCPHS was onsite to observe well abandonment activities. <br /> The wells have been properly abandoned as required. If you should have any questions, please call our <br /> G-R in our Rancho Cordova office at (916) 631-1300. <br /> Sincerely, <br /> Gettler-Ryan Inc. <br /> Greg A. Gurss �ra J. <br /> Project Manager <br /> * No.5577 <br /> Stephen J. Carter <br /> Senior Geologist, R.G OF CAL��� <br /> Attachments: Figure 1 - Vicinity Map <br /> Figure 2 - Site Plan <br /> Well Abandonment Permit <br /> CHS02215.RP1 <br /> 6747 Sierra Court, Suite J Dublin , California 94568 (51 0) 551 -7555 <br />