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Geofiogicaf Technics Inc, <br /> ' 27419,wer Road - � 1 !2 39 <br /> Modesto,Cahfomw 95351 <br /> (209)538-64241FO;r#538-5852 <br /> ' REPORT <br /> Groundwater Monitoring <br /> Spring Quarter 2000 <br /> UST Site <br /> Ted Peters Truclung Co., Inc <br /> 1985 Yosemite Ave <br />' Manteca, CA 95336 <br /> Project No 640 2 <br />' August 18, 2000 <br /> EXECUTIVE SUMMARY <br />' This report summarizes the Spring Quarter 2000 round of groundwater monitoring and <br /> testing that tools place on May 1, 2000 The test results show that only minor amounts of <br /> STEX and TPH-G were present in the ground water sample collected from MW-1 None of <br /> the oxygenated fuel compounds were detected in any of the wells <br /> 1 he groundwater level has risen 0 66 feet since the November 24, 1999 monitoring event <br />' Groundwater gradient calculations show that groundwater flow was N64°W, which is <br /> consistent with all the previous gradients recorded for the UST portion of the site <br />' 1.0 GROUNDWATER MONITORING <br />' 1.1 Hydrogeology of Site <br /> A site-specific groundwater gradient and bearing was calculated from the depth to water <br />' measurements taken during the groundwater monitoring The gradient was 0 001 ft/ft <br /> flowing N64°W The average elevation of groundwater under the site was 14 63 feet above <br />' mean sea level, which is 0 66 feet higher than the previous (November 1999) monitoring <br /> event Depths to water ranged from 8 83 to 9 3 feet bgs <br />