Laserfiche WebLink
During the third quarter 2005, the DO levels in observation wells (MW-3 through MW-10) varied in the <br /> range of 1 1 mg/L to 4 55 mg1L, while the DO levels in background monitoring wells (MW-1 and MW-2) <br /> were in the range of 1 2 mg/L to 2 4 mg/L The DO levels in the observation wells continue to be generally <br /> greater than the background monitoring wells, and is likely due to ozone injection DO levels In the <br /> observation wells are consistent with levels measured during previous monitoring events <br /> Concentrations of COD generally appear to correspond to changes in GRO concentrations for wells <br /> MW-4, MW-6, and MW-8 (Figures 12 through 14) Inorganic constituents such as total iron, nitrates, and <br /> sulfates appear to be influencing the heterotrophic plates counts In the groundwater (Figures 15 through <br /> 17) <br /> Based on the field and laboratory data collected to date, the ozone infection system appears to be <br /> supplying ozone and oxygen to the subsurface as designed <br /> LIMITATIONS <br /> This report was prepared in general accordance with accepted standards of care that existed at the time <br /> this work was performed No other warranty, expressed or implied is made Conclusions and <br /> recommendations are based on field observations and data obtained from this work and previous <br /> investigations It should be recognized that definition and evaluation of geologic conditions is a difficult <br /> and inexact art Judgments leading to conclusions and recommendations are generally made with an <br /> incomplete knowledge of the subsurface conditions present More extensive studies may be performed to <br /> reduce uncertainties This report is solely for the use and information of our client unless otherwise noted <br /> i <br /> K\Bp-Arco for URS\5469\Quarterly\2005\Arco_5469_3Q05 docPage 5 of 6 5T-KATU5 <br />