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<br /> Former Canteen Facility Apnl l4,2005
<br /> Qqartefly GToundWater Monitoring Report Pa e 6
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<br /> SYSTEM OPERATING EFFICIENCY
<br /> During this quarter, the system was shutdown only for oil changes of the ICE unit The total
<br /> down time has been estimated at approximately 2 2 days The uptime for this quarter is 97 4%
<br />' Overall uptime has improved from 89 4%to 910% since the end of last quarter
<br /> RECOMMENDATIONS
<br /> IDelta recommends the following for the Former Canteen Facility.
<br /> • Continue groundwater monitoring and reporting, including measurement of depth to
<br /> groundwater in each well, evaluating monitor well status, preparation of a
<br /> potenttometrtc surface contour map containing the calculated gradient and
<br /> approximate rate of groundwater movement, and, preparation of isoconcentration
<br /> contour maps for benzene and TPH(g) at the two different screened aquifer depths
<br />' • The schedule for groundwater monitoring will remain as follows
<br /> . Quarterly MomtonLag Annual Monitongg
<br />' (1St, 2nd, and 3rd Quarters) (4th Quarter)
<br /> MW-3, MW-3A, MW-3D, MW-1 I All Wells
<br /> MW,13, MW-i3A, MW-13B
<br /> Each well will be gauged quarterly If an analyte is not detected by the laboratory for
<br /> two consecutive quarters, then that analyte will only be monitored for during the
<br /> annual event The analytcs listed below should be removed from the quarterly
<br /> monitoring parameters, but will remain in the annual monitoring parameters
<br /> MW-3 -- 1,2 DCA, EDB, TBA, DIPE, TAME, and ETBE.
<br />' MW-3A— 1,2 DCA, EDB, TBA, DIPE, TAME, and ETBE
<br />' MW-31)— 1,2 DCA, EDB, TBA, DIPE, TAME, and ETBE
<br /> MW-11 —EDB, TBA, DIPE, TAME, and ETBE
<br />' MW-13A— 1,2 DCA, 1 EDB, TBA, DIPE, TAME, and ETBE
<br />' MW-13B— 1,2 DCA, EDB, TBA, DIPE, TAME, and ETBE.
<br /> Delta understands that should a removed analyte be detected in a monitor well during
<br />' annual monitoring, quarterly monitoring and analysis will resume for that well
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