Laserfiche WebLink
Where petroleum hydrocarbons are detected in the field representative or suspected, <br /> soil samples will be logged, sealed and conveyed on ice under Chain of Custody to <br /> ' Sequoia Analytical-Sacramento, certified laboratory for quantification Additionally TDS <br /> will be measured in collected water samples Drilling, sampling and analytical protocols <br /> are discussed in the relevant attachments <br /> 52 Evaluate Groundwater Quality <br /> tThe monitoring well installations directed by PHSIEHD may more allow specific vertical <br /> P <br /> definition of the contaminated soil zone and allow monitoring of ground water below the <br /> zone to determine the impact of migrating petroleum hydrocarbons downwards into the <br /> underlying water table at 45 to 55 FT bgs The ability to measure any lateral travel down <br /> gradient and provide an indication of adsorption of the long chained petroleum <br /> hydrocarbons to the soil media should be enhanced with the installation of the monitoring <br /> ' wells <br />' Potential Monitoring Well Locations <br /> The second MW, location MW-2, will likely be located on site, 40 FT south to 40 FT <br /> SSW of the NE corner of the site Access for the drill rig will bear on the exact location <br /> between the fence line and the existing masonry block wall tank secondary <br />' containment <br />' The location of a third MW, MW-3 will be much more dependent upon the DPT boring and will <br /> be decided after results are reviewed <br /> Monitoring wells will be 2" PVC with design similar to MWA installed in December 2000 <br /> Soil samples will be evaluated at 5 FT intervals between 15 and 35 FT bgs with additional <br /> sampling if soil appears to be contaminated <br />' 5 3 Weigh Remediation Options <br /> Current uses and importance of urgency of restoration must be considered on an <br />' economic basis It is presumed that the source has been removed <br /> lei, <br /> 5-2 <br /> l <br />