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Table 3 , continued <br /> Results of Certified Laboratory Analysis of Groundwater <br /> Samples from Monitoring Wells MW-1 , MW-2 , and MW-3 <br /> August , 1993 - June 24 , 1994 <br /> Date/ <br /> Well Depth to TPH-D TPH-G B T E X <br /> Number Water (ppb) (ppb) (ppb) <br /> ----------------------------------------------------------- <br /> 06/24/ 94 <br /> MW-1 7 30 ft N. D. 730 22 3 1 12 20 <br /> MW-2 6 98 ft N D N D N D N D N D N D <br /> MW-3 6 54 ft N D N D N D N.D N D. N D <br /> ----------------------------------------------------------- <br /> Method <br /> Detection 50 50 0 5 0 5 0 5 0 5 <br /> Limit <br /> -_------------------------------------------------------------- <br /> *Although not required by PHS/EHD, analyses were also <br /> performed for Total oil and Grease (TOG) on the samples <br /> acquired on August 16-18 , 1993 using SM 5520 B&F All <br /> samples were free of detectable concentrations of TOG <br /> TPH-D Total Petroleum Hydrocarbons as Diesel <br /> TPH-G Total Petroleum Hydrocarbons as Gasoline <br /> BTEX Benzene , toluene, ethylbenzene, total xylenes <br /> ppb . Parts per billion <br /> N D Not detected <br /> SUMMARY OF OTHER ENVIRONMENTAL ACTIVITIES PERFORMED DURING <br /> THE _PAST _QUARTER <br /> Calculation of the Direction of Slope of Groundwater Flow <br /> The depths to groundwater measured in MW-1 , MW-2 , and MW-3 <br /> on June 24 , 1994 and previously determined wellhead <br /> elevations were used to develop groundwater contours by the <br /> interpolation method and calculate the direction and slope <br /> of groundwater flow <br /> A line drawn perpendicular to the groundwater contours <br /> indicates the direction of groundwater flow In this case, <br /> the direction of flow is N-234 -E <br /> The distance between the highest and lowest elevation <br /> countours (L) is 106 feet . The elevation difference (h) <br /> between these extreme contours is . <br /> 63 05 ft - 62 45 ft = 0 06 ft <br /> Page 7 <br />