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a i <br /> DOULOS ENVIRONMENTAL COMPANY <br /> 1537 PINE VALLEY CIRCLE <br /> ROSEVILLE, CA 95661 <br /> (916) 782-9054 <br /> j <br /> June 15, 1998 <br /> � I <br /> a <br /> Mr. Terrence Fox <br /> Ultramar, Inc. , <br /> 525 West Third Street <br /> Hanford, California 93230 <br /> Subject: Well Abandonment Report for Beacon#513 I <br /> 401 West Kettleman Lane, Lodi, California °! <br /> i Dear Mr. Fox: , <br /> I � r <br /> Ultramar, Inc. (Ultramar), has contracted Doulos Environmental Company (Doulos) to abandon <br /> monitoring wells, as well as prepare this report for the subject;site. The.purpose of this work was <br /> to meet the requirements for case closure for the underground storage tank investigation that was <br /> conducted at this site as requested by Harlin Knoll from San Joiaquin;County Health Services <br /> Agency. I <br /> a <br /> FIELD WORK <br /> i <br /> The work performed included: Obtaining well abandonment permits from San Joaquin County <br /> (permits enclosed), abandonment of three monitoring wells, and preparing a report which presents <br /> field procedures and volumes of grout used. All activities wer''e completed in compliance with the <br /> 4 <br /> San Joaquin County guideline and California State Department of Water Resources Bulletin 1 <br /> 74-81. <br /> � � I <br /> Pressure Grouting J <br /> On May 22, 1998, Doulos personnel abandoned three monitoring wells. Prior to pressure <br /> grouting the wells, the volume of grout needed to displace the 4pore space in the sand pack, and <br /> the volume of the casing was calculated. The wells were abandoned in place by pressure grouting <br /> with a neat cement slurry. The grout was placed with a trimmie pipe from approximately five feet <br /> above the bottom of the well to the surface. Sections of trimmre pipe were removed as the grout <br /> moved up the casing of the well. After the grout had been trimmied to the surface additional <br /> grout was added to maintain the grout level at the top of the casing as it pushed its way into the <br /> sand pack pore space. The actual volume of grout placed in each well exceeded the calculated <br /> j volume (see Table). Well covers were removed and replaced with like-material to match the <br /> surrounding area. <br /> 4 } <br /> 1 3 <br /> I - <br /> E I <br />