ARCHIVED REPORTS XR0007971 - Laserfiche WebLink

Home Browse Search

i 20 July 2001 AGE-NC Project No 97-0300 Page 4 of 4 I5 0. RECOMMENDATIONS Based upon the results of the first quarter 2001 investigation, AGE recommends • Reduction of quarterly monitoring/sampling ground water monitoring events to semi-annual monitoring/sampling events at the site Thus far, four ground water monitonng/sampling I events have been performed at wells MW-1, MW-2 and MW-3 from June 2000 to March 2001 Based on ground water analytical data collected to date, AGE believes that only residual MTBE and TPH-d may be present in ground water and that continued quarterly I ground water monitoring events at this stage of the investigation is not cost effective and will not provide enough useful information to supplement the ongoing investigation Semi-annual monitoring/sampling events should be adequate to monitor the remedial progress at the site ' and should be re-evaluated on a semi-annual basis The next monitoring/sampling event should be scheduled for September 2001 • Submission of a ground water monitoring well sample collected from MW-1 to a microbiological laboratory for microbial enumeration and physicochemical analysis to assess the potential for natural attenuation of petroleum hydrocarbons in ground water at the site • Elimination of analysis for methanol, ethanol, 1,2-DCA and EDB in collected ground water samples • A corrective action plan report is currently being prepared by AGE to evaluate several remedial alternatives for impacted soil at the site,upon regulatory approval, corrective action should be implemented I 6.0. LIMITATIONS Our professional services were performed using that degree of care and skill ordinarily exercised by environmental consultants practicing in this or similar localities The findings were based mainly upon analytical results provided by an independent laboratory Evaluations of the geologic/hydro- geologic conditions at the site for the purpose of this investigation are made from a limited number ' of available data points (ground water samples), and subsurface conditions may vary away from these data points No other warranty, expressed or implied, is made as to the professional recommendations contained in this report I I Advanced CeoEnvironmental,Inc I