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<br />' Aggregate Industries - F Slreet Site Characterization Report <br />Project Number 1001018 ~nxnooN <br />October 9, 2001 <br />Page I1 <br />7. The BTEX concentrations observed in the groundwater samples collected from MW- <br />' 1 through MW-4 and EW-I in July 2001 did not exceed the MCLs. <br />8. Signiticant impacts to the property boundary, stbsurface utilities, structures, <br />' registered groundwater wells and nearby surface water bodies from the diesel-fuel <br />release at the subject site do not appear to be likely at this time based on current <br />contaminant characteristics and readily available information regarding those <br />receptors. <br />The following recommendations are made based on information obtained during the soil and <br />' groundwater abatement and assessment activities. <br />1. It does not appear that additional soil or groundwater remediation is warranted at the <br />site at this time based on current contaminant characteristics. <br />2. One (l) additional groundwater monitoring well should be installed at the site to the <br />' north-northeast of well MW-2. <br />3. Three (3) additional quarters of groundwater monitoring should be performed at the <br />site to confirm that significant petroleum hydrocarbon contamination in groundwater <br />' is not present at the site. <br />4. Impacted soil which may be encountered during future mining activities performed in <br />' the spill area should be handled in accordance with Federal, State and local <br />regulations. <br />' S. Preparation of a Corrective Action Plan does not appear to be necessary since <br />evaluation of active remedial options is not warranted at this time and groundwater <br />monitoring appears to be appropriate for the site. <br />8. GENERAL COMMENTS <br />' The analyses and opinions expressed in this report are based on data obtained from the <br />indicated locations along with other information described in this report. This report does <br />not retlect any variations in subsurface geohydrology or contaminant distribution which may <br />' occur between wells and or across the site. Actual subsurface conditions may vary and may <br />not become evident without further exploration. Due to the dynamic nature of groundwater <br />' flow and contaminant migration, subsurface conditions will vary with time. <br />This report was prepared for the exclusive use of Aggregate Industries - WCR, Inc. for <br />' specific application to the subject property and has been prepared in accordance with <br />generally accepted geo-environmental engineering practices. No warranties, either express <br />or implied, are intended or made. In the event that changes in the nature or location of <br />1 <br /> <br />