Laserfiche WebLink
i <br /> were sampled end a sAug test, wap, performed on these wells, see <br /> Figures 3, 3B, 3C, Table 1 and Appendix A. <br /> sQ,u <br /> �tygi pu�d;, �rat�s� �,w� Tam + ec1� ttA*m- all of the onsite <br /> �FSl 7 �.�� r ,' - z d ,�.t "'niss during thg monitoring;E roud� gonduo0ed �n Ns�v®i r <br /> // rm <br /> GROUND WATER MONI'T'ORING <br /> A ground water monitoring round was conducted on November 21, <br /> r 1990. During this visit, depth to ground water was measured and <br /> samples were obtained from the six on site monitor wells for <br /> chemical analysis. From this data, a ground water gradient map <br /> 1 was generated, Figures 4A and 4B. Figu aAesea the data <br /> obtained from monitor well � and produces <br /> an anomalous ground water higfi on 2 �relatMvel klat gradient at <br /> that well. Figures 4B and 4C (11-27-90) do not use the data from <br /> monitor well MW5 and show a relatively flat gradient flowing to <br /> the southeast (from MW6 towards MW2) on November 21 , 1990 and a <br /> relatively flat gradient flowing to the south and southeast (from <br /> MW4 towards MW2) on November 27, 1990. Historically this site has <br /> shown flow directions to the southeast and east. The overall <br /> ground water elevation beneath this site has showed a decline, <br /> -- with the exception of the month of January, 1990, which showed an <br /> increase from 0.521 at monitor well MW2 to an increase of 1.330 at <br /> monitor well MW4. Since the last ground water measurments taken <br /> in September, 1990, the ground water has d.acreased in elevation <br /> from 1.34 feet at MW2 to 0.67 feet at MW1, see Table 2. <br /> CHEMICAL RESULTS-GROUND WATER SAMPLES <br /> Ground water samples were obtained from all six on site monitor <br /> wells on November 21, 1990 (MW-1, KW-2, MW-3, MW-4, MW5, and MW6) . <br /> Prior to obtaining the ground water samples each well was purged <br /> using a hand bailer, until the temperature, pH, and conductivity <br /> stabilize a r x at 2� toa w ter-,�, see�ADper�dix <br /> 's or�d�°�on�sifie <br /> y EI r r� <br /> S _ Ground water beneath this site has gasoline range contamination. <br /> Only monitor wells MW1 and MW5 are above the detection limits for <br /> > Total Petroleum Hydrocarbons (TPH) , greaten than 0.05 parts per <br /> million (ppm) , with 2 ppm and 31 ppm respectively showing <br /> significant increases from 0.1 ppm in monitor well MW1 and from 4 <br /> ppm in monitor well MW5 on August 24, 1990. Monitor wells KW1, <br /> r MW2 and MW-5 tested above the detection limits for the volatile <br /> Aromatic Compounds of Benzene, Toluene, Ethylbenzene, and Xylenes <br /> (BTEX) , see TaLle 2 and Appendix S. <br /> b <br /> �� page 3 <br />