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y <br /> a <br />' Mr Don Rodgers Project 792774 01000000 <br /> May 2, 2000 <br /> Page 3 <br />' results and elevation data for the subject site and for the former ARCO site located at 441 West <br /> Charter Way are shown on Figures 2 and 3, respectively <br />' REMEDIATION SYSTEM STATUS- FIRST QUARTER 2000 <br /> The remediation system consists of a Stealth Bobcat Catalytic Oxidizer rated at 100 cubic feet <br />' per minute (cfm) The remediation system began operation during the first quarter On January <br /> 31, 2000, an initial startup event occurred on January 31, 2000 At this time, system repairs were <br /> necessary On February 3, 2000, the startup event occurred under the supervision of regulatory <br />' personnel Effluent air stream sampling showed that the system was operating within permit <br /> guidelines Weekly system O&M events have been conducted and air samples are collected <br /> monthly according to permit requirements As of March 8, 2000, the system was 54% operational <br />' and the average flow rate was 37 1 cfm Downtime resulted from automatic shutdowns when <br /> moisture was pulled into the unit Through March 8, 2000 approximately 452 pounds of TPHG <br /> and 0 02 pounds of benzene were destroyed System operational data is summarized on Tables 1 <br />' through 3, located in Appendix D O&M field sheets and laboratory analytical reports are also <br /> presented in Appendix D <br /> CONCLUSIONS <br />' Analytical results of petroleum hydrocarbons were generally consistent with previous sampling <br /> events Groundwater elevation decreased 0 70 foot from the previous sampling event (November <br /> 1999) <br />' IT will continue to perform quarterly groundwater sampling The next sampling event is <br /> tentatively scheduled for May 2000 1T will continue SVE system O&M O&M site visits will <br />' occur weekly and compliance sampling will occur monthly <br /> Please call if you have questions regarding this report or any aspect of the project <br />' Sincerely, <br />' 1T Corporation <br /> 1r <br /> Mark Capps, R G 6561 Tim Anenson <br /> Project Geologist Project Manager <br />' CPIN ICamPk\Data\ArchivelRodgerslQtrly\RDGRIgOO doc-Mit I IT Corporation <br />