Laserfiche WebLink
' #2236) for a full scan EPA Method 8260B and for TPH as diesel by FPA <br /> Method 8015 The analytical results for this sample are tabulated in the <br /> Tables Section of this report as Table One The influent water sample <br /> analytical report and chain of custody record is attached in Appendix B <br /> A graph showing the effectiveness of the system in relation to the decline <br /> of TPH as gasoline concentrations in the influent water samples is <br /> attached in the Graph Section of this report <br />' Mon hlv ,Fuel Recovery Calculations <br /> The influent TPH-G concentration was used to calculate the estimated <br />' mass removed from the site during the month based on total gallons <br /> treated The Monthly Performance Log is presented as Table Two in t h e <br />' Tables Section of this report It shows that based on the number of <br /> gallons extracted in the month of April 2001, which was 180,270 gallons, <br /> and assuming a constant TPH-G concentration of 1,000 parts per billion in <br />' the influent water stream, the system recovered 024 gallons of gasoline <br /> from the groundwater beneath the site To date, it is estimated that <br /> nearly 31 gallons of gasoline have been removed from the subsurface <br /> IDOWNGRADIENT MONITORING WELLS <br /> Monitoring wells MW-13, MW-14, MW-15, MW-16, and MW-19 are <br /> sampled every 4 to 6 weeks to track the hydrocarbon concentrations of <br /> the groundwater downgradient of the recovery wells These wells are <br /> located across Yosemite Avenue approximately 90 feet downgradient of <br /> the recovery wells, and are the closest observation points to determine if <br /> the plume leaving the site is being remediated Since the start-up of t h e <br /> interim groundwater remediation system, hydrocarbon concentrations <br /> within these monitoring wells have generally dropped one to two orders <br />' of magnitude <br /> Frank's One Stop Remediation System Monthly Report — April 2001 <br /> -3- <br />