ARCHIVED REPORTS_QUARTERLY GROUNDWATER MONITORING REPORT 1ST QUARTER 2016

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Dual Phase Extraction System-Gstar Mass Recovery and Adsorption • Parcee0BM OU 666 West Weber Avenue,Stockton,CA (In order to show best estimate,recovery calculations assume one-half of the detection limit when the orruixemd is reported as less than the detection limit.) System Data Influent Concentrations 9 stove TP ecove TPHo Recove Benzene Recove MTBE Recove TBA Recove ry Period Period Period I Pan d period Period Per od Volume Net Cumulative Net Cumulative Net Cumulative Net ;Cumulativ Net Cumulative Net Cumulative Date Extracted TPHg TPHd TPHo Benzene WEE TBA Adsorbed Adsorbed Adsorbed Adsorbed Adsorbetl Adsorbed Adsorbed Adsorbed Adsorbed Adsorbed Adsorbed Adsorbed Sam etl Nations) L L Ib5 ICs lbs lbs lbs lbs lbs lbs lbs lbs lbs lbs 1013112013 6.957 150 2,600 920 10.50 10.50 15.0 5 . 2/13/2014 3,2280.000 .025 '50 420 250 10.50 10.50 15.0 0.001 152.62 0.041 9,572.34 0.016 5,153.52 0.000 0.079 0.000 0.025 0.000 0.581 3/2712014 2,865 1,800 5,100 480 10.50 10.50 15.0 0.022 152.64 0.066 9,572.40 0.009 5.153.53 0.000 0.079 0.000 0.025 0.000 0.581 4/2812014 1,505 110 1,300 210 1.3 10.50 15.0 0.012 152.65 0,040 9,572.44 0.004 5,153.64 0.000 0.079 0.000 0.025 0.000 0.581 7/16/2014 625 160 440 250 10.50 10.50 5.9 0.001 152.65 0.005 9,572.45 0.001 5,153.54 0.000 0.079 0.000 0.025 0.000 0.581 10/24/2014 597 180 710 290 13 10.50 9.6 0.001 152.66 0.003 9,572.45 0.001 5.153.64 0.000 0079 0.000 0.025 0.000 0.581 2/5/2015 605 66 520 170 1.5 10.50 15.0 0.001 152.66 0.003 9,572.45 0.001 5,153.54 0.000 0.079 0.000 0.025 0.000 0.582 00 4/242015 754 <50 820 210 10.50 0.54 9.3 0.000 152.66 0. 4 9,572.46 0.001 5.153.54 0,000 0.079 0.000 0.025 0.000 0.582 7/30/2015 1,199 53.8 2.2 1.5 10.50 0.50 5.0 0.001 152.66 0.004 9,572.46 0.001 5,153.54 0.000 0.079 0.000 0.025 0,000 0.582 10/1 20742015 _ 1,067 63 680 160 __'0.19 0.44 8.4 _ 0.001 __ 152,66 0.003_ _9,572A6 0 001 5,153.54 _0 000 _ 0.079 0.000 __ 0,025 0.000 0.582 8- - 985 80 1100 250 0.50 10.50 15.0_ 0T- - -153.66 - 6-W7 9,572.47 0.002 5,153.55 - 0:000 b.079 0.000 0.025 0.000 0,582 Current Reporting Period: First Quarter 2016 Cumulative Totals: March 18,2004 through January 14,2016 Hours Operated During Reporting Period 4.25 hours Number Days Operational Since Startup 1,697 days Extracted Ground Water 985 gal Cumulative Total Gallons Extracted 7.307,672 gal 2.99 Average Flow Rate 3.86 gpm Cumulative Average Flow Rate 2.99 Spin Pounds of TPHg Removed During Period 0.001 lbs Cumulative Pounds of TPHg Removed 152.86 lbs 0.1 Ibs/tlay Pounds of TPHd Removed During Period 0.003 lbs Cumulative Pounds of TPHcI Removed 9,572.46 lbs 5.6 Ibs/day Pounds of TPHo Removed During Period 0.001 lbs Cumulative Pounds of TPHo Removed 5,153.54 lbs 3.0 lbs/day Pounds of Benzene Removed During Period 0.000 lbs Cumulative Pounds of Benzene Removed 0.079 lbs 0.000 lbs/day Pounds of MTBE Removed During Period 0.000 lbs Cumulative Pounds of MTBE Removed 0.025 lbs 0.000 Ibs/day Pounds of TBA Removed During Period 9.000 lbs Cumulative Pounds of TBA Removed = 0.582 gas 0,000 lbs/day_ Definitions: Equations: TPHg =Total petroleum hydrocarbons as gasoline gal =gallons TPHg=Total petroleum hydrocarbons as diesel pg/L=micrograms per liter lbs adsorbed=(gallons groundwater exvacted)'(AVG ug4 removed)'(2.2 lb&g)'(3.7858ga0'(10A-9 kg/ug) TPHo=Total petroleum hydrocarbons as oil lbs/day=Pounds per day MTBE =Methyl-tertiary butyl ether ICs =pounds TBA=tertiary-butyl alcohol <=Value is less than laboratoryreporting limit give =gallons Per minute =Not anal ed/N.It applicable Page 3 Stantec