ARCHIVED REPORTS_XR0006675 - Laserfiche WebLink

Home Browse Search

Ouarterly Monitoring Report January 2001 Canepa's Car Wash(Pacitu,Avenue) Page-5 ' TABLE 2 LABORATORY ANALYTICAL RESULTS (JANUARY 9 AND 10, 2001) ' B T E X TPH-G MTBE Reporting /units 05 05 05 1 0 005 50 Monitor Well I D pg/L ltg/L pg/L pg/L mg/L �tg/L ' 1707-MWI-1/10/01 554 305 691 210 247 450 ' 1707-MW2-1/10/01 25,400 1,570 1,730 5,330 67 ' 172 1707-MW3-I/10/01 ND ND ND ND ND 324 ' 1707-MW4-119/01 24 ND ND ND 00779 ND 1707-MW5-1/9101 ND ND ND ND ND ND 1707-MW6-1/9/01 ND ND ND ND ND ND 1707-MW7-1/10/01 5 1 05 09 22 ND ND ' 1707-MW8-1/9/01 ND ND ND ND ND ND Unit Convursions Analytical iii/L parts per billion(ppb) B T E X=benzene toluene ethyl benzene and total xylenes ' mg/L parts per mullion(ppm) TPH-G=total petroleum hydrocarbons quantified its gasoline MTBE=Methyl tertiary Butyl Ether ND=not detected at or above the laboratory reporting limit 4 3 SOIL VAPOR EXTRACTION SYSTEM Operation of the SVE system was initiated on March 15, 1999 Condor monitors the system on a monthly basis Volatile organic vapor screening is peifoiined with a photo-Ionization detector(PID) at the system inlet and exhaust to evaluate the destruction efficiency of the theinnal oxidation unit Vacuum measurements in inches of water are recorded from ports installed at the SVE wells to evaluate the radius Of Influence Vat tous other system parameters ale monitored to maintain optimum pertormance of the SVE system (see SVE System Log, Appendix D) The destruction efficiency for 1999 ranged fiom 95 27% to 99 94% and for the year 2000, the destiuction efficiency has ianged troin 96 66% to 100% The average desti uction rate for 1999 was 98 71% and for 2000 was 98 8% The SVE systern has been down a total of 95 days, approximately 14% of the time, since operation was initiated on March 15, 1999 The system was down from January 18, 2001 until I January 23, 2001 The efficiency late upon restarting the system was 69% Because of the low efficiency upon restarting the s_vstein additional monitoring of and adjustments to the system will be conducted to verify that it T caches proper efficlenLy If the system does not reach 95% efficiency, it wi l l be T emoved Roti] �,CIVILC diad 1CCVd111dLet1 5 0 DISCUSSION OF RESULTS 5 1 DISCUSSION OF GROUNDWATER ELEVATIONS The average depth to groundwater measured during the January 2001 groundwater-monitoring event was approximately 32 8 feet below the monitor well measuiing points, which is approximately 12 to 18 feet above the top of all monitoring well screens The gioundwatei elevation ranged from 19 33 to 20 36 feet I � �a CONDOR