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• qeotogicat TechnW-0 s Inc. <br /> 1 10 1 7'h Street <br /> Modesto,California 95354 <br /> (209)522-4119/Fax(209)522-4227 <br /> ' REPORT <br /> ' Groundwater Monitoring <br /> 1st Quarter 2002 <br /> UST Site <br /> 1 <br /> Ted Peters Trucking Co., Inc. <br /> ' 1985 Yosemite Ave. <br /> Manteca, CA 95336 <br /> ' Project No 640 2 <br /> May 8, 2002 <br /> EXECUTIVE SUMMARY <br /> ' This report summarizes the I" Quarter 2002 round of groundwater monitoring and testing <br /> that took place on January 17, 2002 Laboratory analyses indicate that BTEX and TPH-G <br /> ' are not present in the ground water samples collected from MW-1, MW-2 or MW-3 In <br /> addition, none of the oxygenated fuel compounds were detected in any of the wells <br /> ' The groundwater level has increased 0 91 feet since the November 7, 2001, monitoring <br /> event Groundwater gradient calculations show that groundwater flow was due west, which <br /> is the farthest westerly direction recorded for the UST portion of the site <br /> 1 <br /> 1.0 GROUNDWATER MONITORING <br /> ' 1.1 H dro eolo of Site <br /> Y g gY <br /> ' A site-specific groundwater gradient and bearing were calculated from the depth to water <br /> measurements taken during the groundwater monitoring The gradient was 0 0004 ft/ft <br /> flowing west The average elevation of groundwater under the site was 14 19 feet above <br /> ' mean sea level, which is an increase of 0 91 feet since the August 1, 2001 event Depths to <br /> water ranged from 9 28 to 9 74 feet bgs <br />