Laserfiche WebLink
09 May 2002 <br /> AGE-NC Project No 96-0232 <br /> Page 7of8 <br /> evacuation (purging) with a submersible pump to finish the removal of fine-grained sediment <br /> Developmental purging activities will be continued until field parameter(pH, electrical conductivity, <br /> and temperature) readings have stabilized and purged water is visually sediment-free Well <br /> development will occur no sooner than 72-hours following well completion <br /> 34 GROUND WATER AQUIFER PUMPING TESTS <br /> Two 24-hour, Second Zone and Rocky's Upper Zone ground water aquifer pumping tests will be <br /> performed at the site to induce a decline in static water level in the newly Installed ground water <br /> extraction wells A constant ground water pumping rate (approximately 5 gallons per minute) will <br /> be utilized from the ground water extraction well during the aquifer pump test to achieve optimum <br /> draw-down influence The draw-down in ground water level versus time will be measured with <br /> pressure transducers, at a mmimum, in wells MW-4 (Three B's Truck Plaza), MW-7, MW-14, <br /> MW-15, MW-16, MW-17 and MW-18 and manually measured in well MW-11 (A, B, C and D) <br /> Grab water samples will be collected at 6-hour intervals and submitted to a DHS-certified laboratory <br /> for the following constituents <br /> • TPH-g and tPH-d in accordance with EPA Method 8015 Modified/5030/3550, <br /> • BTEX, methanol, ethanol, 1,2-DCA, EDB, MTBE, TAME, DIPE, ETBE and TBA by EPA <br /> Method 8260 Modified, and <br /> Laboratory reports for ground water analysis, testing methods, laboratory quality assurance/quality <br /> control (QA/QC)reports, and sample chain of custody documentation will be presented in a report <br /> with findings and recommendations <br /> Purged ground water will be containerized In an on-site 6,500-gallon Baker tank, following the <br /> 24-hour pump test, the purged ground water will be transferred from the Baker tank to the Flag City <br /> Chevron pump-and-treat ground water remediation system for treatment and disposal <br /> 35 IN-SITU OZONE SPARGING PILOT TEST <br /> Ozone sparging is an In-situ air stripping process utilizing fine bubbles of ozone that will be injected <br /> Into saturated soil via OW-1 to extract and decompose dissolved petroleum hydrocarbon <br /> constituents An ozone generator will be utilized to produce gaseous ozone which will be infected <br /> into the subsurface via microsparge points The"microbubbles"(approximately 50 micrometers)will <br /> Advanced GeoEnvwonmental,Inc <br />