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' RM Associates 701-0102 <br /> ' removed from the soil is the lack of rebound in the detected hydrocarbons in groundwater nearly four <br /> years after active remediation at the site had ceased <br /> The site is free of the gasoline oxygenates, including MTBE, (although a minor amount of 1,2-DCA <br /> at 2 7 �tg/L was detected in most recent monitoring of BIE-MW3) The absence of MTBE has been <br /> well established by analyses The remaining concentrations of TPHg and benzene are readily <br /> biodegradable and will most certainly continue to biodegrade toward non-detectable levels <br /> ' Based upon the evidence presented and summarized in this report, including monitoring data over <br /> a period of approximately four years following cessation of active remediation, and upon the <br /> ' conclusions cited above, RMA contends that further investigative or remedial activity at the site is <br /> no longer warranted The presence of the existing monitoring and extraction wells at the site are <br /> considered to represent far more of a hazard than do the remaining concentrations of petroleum <br /> ' hydrocarbons <br /> It is RMA's recommendation, therefore, that the site be considered for immediate closure and <br /> because the site is no longer involved with dispensing petroleum hydrocarbons, that all existing <br /> monitoring and extraction wells be appropriately destroyed <br /> ' 6.0 CERTIFICATION <br /> This report has been reviewed and approved by the client or responsible party To the best of our <br /> knowledge, all statements and information provided in this report are true and correct <br /> �F1D Q co <br /> * a1'-" 0� <br /> ' Ronald W Midielson, R G <br /> cc <br /> No 387r � <br /> ' F-VP o4le6 , <br /> OF C5�� <br /> ' Page 10 of 11 <br />