Laserfiche WebLink
Environmental <br /> Mr Harlin Knoll Resources <br /> 21 February 2001 Management <br /> Page 3 <br /> were the only compounds detected in this well As shown in Table 1, the <br />' previous concentrations were detected at levels slightly exceeding their <br /> detection limits The absence of detectable concentrations during the <br /> current sampling event indicates that the previous low concentrations <br /> have declined to levels below their respective detection limits <br /> Former Tank 2 Location <br /> Analytical results for ground water samples collected at former tank 2 <br /> are presented in Table 2 As shown, the concentrations of compounds <br /> detected in the shallow wells during the current sampling event were the <br /> lowest concentrations ever detected in these wells At MW-5 (upgradient <br />' of the former tank location), no detectable concentrations of chemicals <br /> were reported At MW-6 (immediately downgradient of the former tank <br /> location), TPH-g and BTEX were detected at the lowest concentrations <br /> ever recorded in this well At MW-2 (downgradient of the former tank <br /> location), no detectable concentrations of chemicals were reported The <br /> decrease in concentrations at MW-6 and the absence of chemical <br /> detections at MW-2 appears to indicate that natural attenuation <br /> continues to decrease the chemical concentrations at this location <br />' In the deep well MW-S , no detectable concentrations of TPH-{ ) g or BTEX <br /> were present During the previous sampling event, conducted <br /> immediately following monitoring well installation, TPH-g, toluene, <br /> ethylbenzene, and xylenes were detected at MW-8 As shown in Table 2, <br />' these compounds were detected at concentrations slightly in excess of <br /> their detection limits during the previous sampling event The absence <br /> of detectable concentrations during the current sampling event indicates <br />' that the previous low concentrations have declined to levels below their <br /> respective detection limits <br />' Conclusions <br />' The results of ground water samples collected in shallow monitoring <br /> wells indicate that chemical concentrations at each former tank site are <br /> decreasing Based on the sampling results collected to date, natural <br /> t attenuation is expected to continue to reduce the chemical concentrations <br /> in ground water at each former tank site <br /> For the dee wells, the absence of detectable concentrations during the <br />' P g <br /> current sampling event indicates that the previous low concentrations <br />' have declined to levels below their respective detection limits The <br />