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Table 13 <br /> Ozone Injection Well Monitoring Program <br /> Stockton Terminals Technical Committee <br /> Port of Stockton <br /> Stockton, California <br /> Ethyl- Total DO ORP <br /> Sample Water Sampling TPHg Benzene benzene Toluene Xylenes MTBE TBA Pre-Purge I Post-Purge Pre-Purge I Post-Purge <br /> Identification Zone Date (pg/L (pg/L) (pg/L) (pg/L) (pg/L) (pg/L (pg/L (mg/1) (mV) <br /> Trigger Wells-B Zone(cont.) <br /> OW-2B B 10/31/07 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 6.46 3.80 101 -64 <br /> OW-2B B 02/06/08 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 3.75 3.26 -3.3 -15.8 <br /> OW-2B B 05/06/08 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 1.26 0.86 -121.6 -45.6 <br /> OW-2B B 08/05/08 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 1.27 0.73 -211.7 -249.5 <br /> OW-2B B 11/04/08 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 0.52 0.49 -177.7 -156.7 <br /> OW-2B B 02/03/09 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 4.32 3.91 261.8 227.7 <br /> OW-2B B 05/05/09 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 0.36 0.49 -125.3 -132.7 <br /> OW-2B B 08/05/09 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 0.36 0.31 -250.8 -252.8 <br /> OW-2B B 11/03/09 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 2.24 2.20 -133 -120 <br /> OW-2B B 02/02/10 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 3.51 2.90 -95.2 -106.1 <br /> OW-4B B 02/08/06 <50 <0.50 <0.50 <0.50 <2.0 <0.50 9.9 8.28 246 179 <br /> OW-4B B 05/11/06 70 <0.50 <0.50 <0.50 <2.0 <0.50 1.18 1 -71 -110 <br /> OW-4B B 08/09/06 <50 <0.50 <0.50 <0.50 <2.0 <0.50 1.86 1.08 99 -6.5 <br /> OW-4B B 11/02/06 <50 <0.50 <0.50 <0.50 <0.50 <0.50 2.13 1.82 -110 -89 <br /> OW-4B B 01/30/07 <50 <0.50 <0.50 <0.50 <0.50 <0.50 1.39 1.50 -156.4 -138.2 <br /> OW-4B B 05/03/07 <50 <0.50 <0.50 <0.50 <0.50 <0.50 0.85 0.41 -136.3 -125 <br /> OW-4B B 07/31/07 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 0.23 0.71 -130.8 -120.8 <br /> OW-4B B 10/31/07 <50 <0.50 <0.50 <0.50 <0.50 <0.50 6.5 <br /> OW-4B B 02/06/08 <50 <0.50 <0.50 <0.50 <0.50 <0.50 20 1.23 0.86 -209.6 -157.7 <br /> OW-4B B 05/07/08 <50 <0.50 <0.50 <0.50 <0.50 <0.50 18 0.39 0.36 -21.5 -112.6 <br /> OW-4B B 08/06/08 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 0.49 0.36 -316.9 -299.6 <br /> OW-4B B 11/04/08 <50 <0.50 <0.50 <0.50 <0.50 <0.50 10 0.96 0.31 -138.6 -200.6 <br /> OW-4B B 02/04/09 <50 <0.50 <0.50 <0.50 <0.50 <0.50 35 0.81 0.61 -183.4 -146.3 <br /> OW-4B B 05/04/09 <50 <0.50 <0.50 <0.50 <0.50 <0.50 31 3.7 2.7 -571.1 -526.9 <br /> OW-4B B 08/05/09 <50 <0.50 <0.50 <0.50 <0.50 <0.50 53 0.91 0.75 -423.3 -401.3 <br /> OW-4B B 11/04/09 <50 <0.50 <0.50 <0.50 <0.50 <0.50 22 1.45 1.57 -228 -217 <br /> OW-4B B 02/03/10 <50 <0.50 <0.50 <0.50 <0.50 <0.50 15 1.13 1.15 -155.1 -151.3 <br /> Trigger Well Concentration Limits pg/L: 0.15** 29 42 17 5 <br /> Explanation: <br /> TPHg=total petroleum hydrocarbons as gasoline,analyzed by EPA Method 8260B DO=dissolved oxygen mg/I=milligrams per liter <br /> MTBE=methyl tertiary butyl ether,analyzed by EPA Method 8260B ORP=oxidation reduction potential mV=millivolts <br /> BTEX=benzene,toluene,ethylbenzene,and xylenes analyzed by EPA Method 8260B. --=not sampled/not analyzed pg/L=micrograms per liter <br /> **The default compliance limit for benzene is the method reporting limit of 0.5 pg/L per CRWQCB electronic communication dated January 6,2005. <br /> (#) Compliance value per RWQCB Letter dated December 15,2008. <br /> (*)TBA compliance limits for indicated wells(*)are based on the median value of all available datea through third quarter 2008. <br /> Historical average calculations are based on all data available through fourth quarter 2005,which includes the time prior to the activation of the ozone injection system and the anticipated one year <br /> initial spike in concentrations following activation of the ozone injection system for groundwater system re-equilibration. <br /> 1Q10 OzoneConcentration Tables.xls Page 6 of 6 <br />