Laserfiche WebLink
The groundwater samples collected from MW- 1 , MW-2 and MW-3 contained detectable <br /> concentrations of petroleum hydrocarbons, including TPH-as-gasoline, TPH-as-kerosene, and <br /> BTEX compounds. The groundwater sample collected from MW-4 did not contain detectable <br /> concentrations of petroleum hydrocarbons. The oxygenate compounds, TPH -as-diesel and TPH- <br /> as-motor oil were not detected in any of the four groundwater samples. The groundwater sample <br /> analytical results are summarized in Table 2 , the distribution of TPH-as-gasoline and benzene in <br /> groundwater is shown on Figure 5 , and the laboratory report is included in Appendix B. <br /> Between September 12 , and December 11 , 2003 , the concentrations of petroleum hydrocarbons <br /> in groundwater remained relatively stable. Since the monitoring wells were installed in July 2002 , <br /> the concentrations of petroleum hydrocarbons in groundwater have generally declined , probably <br /> due to prior source removal efforts and on-going natural attenuation processes. The plume of <br /> impacted groundwater appears to be defined at MW-4 to the north-northeast of the former USTs. <br /> Otherwise, the lateral and vertical extent of impacted groundwater remains undefined . <br /> 8 <br />