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REMEDIATION TESTING ANDDESIGN <br /> ENVIRONMENTAL INVESTIGATION REMEDIATION SITE CLOSURE <br /> 609 Pacific Avenue, Suite 201, Santa Cruz 95060, CA <br /> Phone 408-458-1612 FAX 408-458-1509 <br /> May 28, 1993 <br /> Mr. Harlan Knoll <br /> San Joaquin County Public Health Services <br /> 445 North San Joaquin Street <br /> Stockton, California 95201 <br /> Subject: Workplan to Conduct a Soil Gas Survey and Vacuum <br /> Extraction Feasibility Testing at Beacon Station #513 <br /> Located in Lodi, California <br /> Dear Mr. Knoll : <br /> Remediation, Testing and Design (RTD) is pleased to submit the <br /> following Workplan to conduct a soil gas survey (SGS) and perfor-ft <br /> vacuum extraction feasibility testing (VEFT) at Beacon Station #513 <br /> located at East Kettleman Lane and South Lee Avenue in Lodi, <br /> r' California. The submittal of this Workplan is in response to our <br /> -: telephone conversation on May 26, 1993 in which you detailed what <br /> would be required in the body of the Workplan. <br /> The field work is tentatively scheduled for June 8, 1993 . RTD <br /> would fully appreciate your cooperation in expediting this request <br /> and in taking time to review this Workplan. Any comments that you <br /> may have will be gladly accepted and will be incorporated <br /> immediately into a revised Workplan to ensure regulatory <br /> compliance . <br /> SCOPE OF WORK <br /> RTD proposes the following activities : 1) Conduct a Soil Gas <br /> Survey, 2) Conduct Vacuum Extraction Feasibility Testing, and 3) <br /> Prepare a report outlining the procedures, data, evaluations, <br /> findings, and recommendations . Details of these activities are <br /> presented below. <br /> Soil Gas Survey <br /> In order to investigate and characterize the general extent and <br /> distribution of possible hydrocarbon impacts to shallow soils, a <br /> limited Soil Gas Survey (SGS) is proposed. The SGS will generally <br /> consist of the installation of 16 temporary vapor extraction <br /> >: 3 probes . The probes will be constructed of Schedule 80 3/4-inch <br /> diameter carbon steel pipe . Each probe will contain a 36-inch <br />