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4 <br /> 1 <br /> . Thud Quarter 1998 VES Report-TosLo 76 Branded Station No 6981 <br /> October 27, 1998 <br /> Hydrocarbons were detected in all three of the effluent airstream samples collected during the third <br /> quarter 1998 Concentrations of TPHg ranged from 12 to 29 ppmv However, these concentrations <br /> are within the permit requirement of 95% or greater destruction efficiency or <2 pounds per day <br /> (lb /day) emission rate VES destruction efficiencies ranged from 50 00 to 93 33%, and the <br /> emission rates for TPHg ranged from 0 7 to 1 7 lb /day <br /> Fourth Quarter 1998 Scheduled Activities <br /> The following activities are planned for the site during the fourth quarter 1998 <br /> 9 GR will monitor and sample groundwater wells at the site, and will submit the quarterly <br /> groundwater monitoring and sampling report to the appropriate agencies <br /> o GR will continue to pulse the VES and monitor VES operational parameters every two weeks <br /> Influent and effluent vapor stream samples will be collected monthly and analyzed as required <br /> in the operating permit The Fourth Quarter 1998 VES Status Report will be submitted to the <br /> appropriate regulatory agencies by January 31, 1999 <br /> If you have questions, please call us in Sacramento at (916) 631-1300 <br /> . <br /> Sincerely, �`S.��REOG 0, <br /> Gettleettler-Ryan Inc. <br /> d <br /> y � <br /> 'Stephen J Carte N0.5577 <br /> Senior Geologist dt <br /> R G 5577 <br /> // OF CALIFflQ, <br /> Greg A Gurss <br /> Senior Project Manager <br /> Attachments Table 1 - Summary of VES Chemical Analytical Data <br /> Table 2 - Summary of VES Operation <br /> Figure 1 Vicinity Map <br /> Figure 2 Site Plan <br /> Field Methods and Procedures <br /> VES Chemical Analytical Data and Chain-of-Custody Forms <br /> 140124 04 2 <br />