Laserfiche WebLink
E <br /> The results of the analysis of the groundwater samples in parts <br /> per billion (ppb) are shown in Table 4. The laboratory data <br /> sheets with detection limits and COC documentation are contained <br /> in Appendix B. <br /> TABLE 4 <br /> 0 <br /> Groundwater Sample Analysis Resultsin PPM. <br /> SAMPLE TPHG TPHD MTBE B T X <br /> MW-1 15 3 . 3 250 34 30 1 . 8 9 . 8 <br /> MW-2 25 1 . 51 8 . 8 . 16 . 028 . 12 <br /> MW-3 66 4. 6 < . 5 17 1 . 3 . 64 6 . 8 <br /> MW-4 19 1 . 7 4. 6 4. 5 . 68 . 021 2 . 2 <br /> MW-5 0 . 12 . 082 ND . 0017 . 003 . 00072 1 . 0019 <br /> ND = NOT DETECTED <br /> Gradient Calculation <br /> Prior to purging the wells and collecting groundwater samples, on <br /> August 30, 2000, the depth to groundwater was measured. A survey <br /> i of the wells in order to calculate a gradient was completed using <br /> the cement sidewalk corner on the southeastern corner of the <br /> store as a benchmark with an assumed elevation of 30 feet . <br /> The depth to groundwater was measured in the five wells, by an <br /> electronic probe, from the mark located on the top of each <br /> casing. The resulting data is shown in Table 5 . <br /> TABLE 5 <br /> Groundwater Elevation measurements - August 30, 2000 in Feet <br /> Well ID Well Elevation Depth to Water Groundwater <br /> Elevation <br /> MW-1 28. 25 59. 95 -31. 70 <br /> MW-2 28 . 54 60 . 17 -31 . 63 <br /> MW-3 28 .49 59 . 94 -31. 45 <br /> MW-4 28. 51 60. 10 -31.. 59 <br /> MW-5 28. 63 60 . 11 -31. 48 <br /> r <br /> 9 <br />