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I � CLEARWATER u R O L P I \ L Envy anmrnful Se rz, 9 in mid 1998 in accordance with Clearwater's Problem Assessment Report, Feasibility Study, and Remedial Action Plan dated February 21, 1996, Revised Remedial Action Plan dated November 12, 1996, and Constructions Specifications dated March 28, 1997 The system was tested on September 28, 1998 for initial compliance testing according to the SJVUAPCD ATC permit#N-3868-1-0(Appendix D) Mr Craig Mitchell,the SJVUAPCD representative, was present on-site to witness verification testing Results of the verification testing indicated that the system was operating within compliance of the permit, and the remediation system was restated for full operation on October 7, 1998 Results of initial system testing were presented to Clearwater's letter report dated October 1, 1998 3 1 Operational Data -- Soil Vapor Extraction, and Treatment Petroleum hydrocarbon vapors extracted from soil and groundwater are treated by a Solleco ECAT 250 all electric catalytic oxidizer(catox) In accordance with the SJVUAPCD PTO permit#N-3868-1-0 (Appendix D), the influent and effluent air streams for the catox unit were analyzed for contaminant concentrations (TPHg and BTEX)on a monthly basis Catox operational data and analytical results of influent and effluent samples are presented on Table 3, and the SVE/AS process flow diagram is shown on Figure 6 Cumulative analytical results of vapor samples collected from the catox influent and effluent streams are presented on Table 4 The following is a summary of the operational data and analytical results of samples from the SVE process stream for this monitoring period • Monitoring date Influent/effluent sampled on 7/191199, 8110/99, and 9/13/99 • Operational Hours 1,676 hours this period and 6,638 to date • Sys up time this period 83% • Influent air flow rate 157 sefm(7/19/99)to 170 scfm(9/13/99) • Influent air TPHg 28 mg/m3 (8/10199)to 23 mg/m3(9/13/99) • Effluent air TPHg <10 mg/m3(7/19, 8/10, and 9/13/99) • Destruction efficiency >54 517c (7/19/99) to>63 4% (8/10/99) • TPHg recovery rates 0 01 lbs/hr(8/10/99)to 0 03 lbs/hr(7/19/99) • Total TPHg recovery 33 lbs (5 4 gal)this period and 7,377 lbs(1,209 gal)to date • TPHg emission rates <0 01 lbs/hr(7/19, 8110, and 9/13/99) • Operating wells VW-1 to VW-4, MW-1,and RW-1 • Analytes tested TPHg and BTEX • Analytical methods EPA Methods 8015 (modified)and 8020 • Laboratory Entech Analytical Labs,Inc , Sunnyvale,CA(CA FLAP#2224) The TPHg recovery rate is based on analytical influent air sample results and concurrently measured air flow The average TPHg recovery rate for each month is multiplied by hours of operation for that period to calculate TPHg removal for the period between each sampling event D-107 3Q99 GW&Sys Mon Report 3 September 29, 1999