Laserfiche WebLink
i <br /> 8.0 WASTE MANAGEMENT <br /> Dnll cuttings are stored on site and covered by 6 mil plastic sheeting Proper disposal <br /> procedures will be implemented pending regui,ttory agency approval The dnll!ng augers were <br /> steam cleaned prior to drilling each boring All nnseate is containerized in DOT approved <br /> containers and left on site pending approval of disposal procedures <br /> 9.0 CONCLUSIONS <br /> To assess groundwater quality and to determine the groundwater gradient beneath the site, three <br /> manitoring wells were drilled to a total depth of approximately 77 feet below grade <br /> Groundwater was encountered during drilling activities at approximately 62 feet The <br /> groundwater gradient, as determ.ned from the monitoring wells and g*oundwater elevations, is <br /> in a no:t`ierly direction at apprcx,mately 6 029 feet/feet <br /> Analyzed soil samples collected at the soillgroundwatei interface determined that only toluene <br /> was detected above method detection'limits Toluene concentrations ranged from 0 015 to 0 023 <br /> mg/kg To accurately determine groundwater quality beneath the site, groundwater samples <br /> were collected on May 7, Julie 21, and August 22, 1991 Laboratory results of all analyzed <br /> groundwater samples determined that petroleum hydrocarbons were only detected in monitoring <br /> wells MW I and MW2 Laboratory analyses of the August 22, 1991 samples determined that <br /> only benzene was detected above methor+ detection limits, 0 41 and 0 63 jig/I, respectively <br /> From all sampling rounds, no constituents were present above Maximum Contaminant Level, <br /> established by the State Department of Health Services <br /> The source i>f impaction has been removed Based on the information provided concentrations <br /> of dissolved petroletim constituents in groundwater are below the State MCLs and do not warrant <br /> active remediation at this time <br /> PIP <br /> cum,u.sA nw ice <br /> csR.•»i 8 <br />