Laserfiche WebLink
Groundwater Gradient: 0.002 ft/ft <br /> SVE SYSTEM QUARTERLY OPERATION AND PERFORMANCE <br /> Equipment Inventory: 100 cfm Stealth Catalytic Oxidizer <br /> Operating Mode: Shut down pending SJVUAPCD application review <br /> APCD Permit No.: N-903-2-0 <br /> TPH Concentration End of Period (lab): --- <br /> Benzene Concentration End of Period(lab): --- <br /> MTBE Concentration End of Period (lab): --- <br /> Flow Rate End of Period: - - <br /> HC Destroyed this Period(lab): --- <br /> Cumulative HC Destroyed: 3467.25 lbs. <br /> Percent Time Operational: 0 <br /> DISCUSSION: <br /> At the time of the first quarter monitoring event, groundwater was encountered in the monitoring wells at <br /> depths ranging from approximately 42.20 to 44.62 feet below ground surface (bgs). Well S-1 was dry. <br /> Groundwater elevations in the monitoring wells increased 1.74 to 2.21 feet since the fourth quarter 2002 <br /> sampling event. Depth to water measurements were normalized to mean sea level (MSL), and were used <br /> to construct a groundwater elevation contour map (Figure 2). The general groundwater flow direction on <br /> January 17, 2002, was calculated to be towards the south-southeast at an average gradient of 0.002 ft/ft. <br /> South-southeast groundwater flow direction has consistently been observed during previous monitoring <br /> events. <br /> TPHG was detected in well MW-4 (55 pg/L). MTBE was detected in wells MW-3 and MW-4, with the <br /> highest concentration (24 pg/L) detected in well MW-3. MTBE was also detected in well MW-7 (19 µg/L), <br /> BTEX compounds were was not detected in any of the wells during the first quarter 2003. TBA was <br /> detected in wells MW-3 (9.3 fig/L) and MW-4 (6.1 gg/L). Fuel oxygenate compounds were not detected in <br /> wells MW-1, MW-2, MW-6, MW-9, and MW-10. TPHG, benzene, and MTBE data have been summarized <br /> on Figure 3. <br /> ATTACHMENTS: <br /> • Table 1 Groundwater Elevation and Analytical Summary <br /> • Table 2 Groundwater Analytical Results for Oxygenates <br /> • Figure 1 Site Location Map <br /> • Figure 2 Groundwater Elevation Contour Map(First Quarter 2003) <br /> • Figure 3 Groundwater Analytical Summary (First Quarter 2003) <br /> • Appendix A Field Data Sheets <br /> Appendix Sampling and Analysis Procedures <br /> • Appendix C Certified Analytical Reports and Chain-of-Custody Documentation <br /> P:IUSA Gasoline100651Qtrly120031USA_65_1Q03.DOC STRATUS <br />