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APPENDIX B <br />VOLUME-MASS CALCULATIONS OF EXTRACTED GASOLINE HYDROCARBONS <br />OCAMPO PROPERTY - 821 South Wilson Way, Stockton, California <br />Assumptions: <br />Utilizing field measurements collected during the SVE remediation (Table 1) and analytical data collected from <br />air samples (Table 2), the volume of extracted gasoline hydrocarbons at the site can be approximated. <br />Hydrocarbon mass removed during the operating period can be calculated using the following equation: <br />M=C-Q-t <br />Where: M = cumulative mass recovered (kg) <br />C = TPH-g vapor concentration (kg/m3) <br />Q = extraction flow rate (m3/hr) <br />t = operational period (hrs) <br />The average inlet TPH-g concentration and average inlet flow rates during each time interval were utilized for calculating the <br />approximate mass/volume of extracted gasoline hydrocarbons. <br />Time <br />Interval (pg/I) <br />C (TPH-g) <br />Average Average <br />(pg/l) (kg/m') <br />(ft3/m in) <br />Q <br />Average <br />(ft3/min) <br />Average <br />(m3/hr) <br />t <br />(hours) (kg) <br />M <br />(pounds) (gallons) <br />03/07/11 <br />04/04/11 <br />1,000 <br />430 715 0.000715 81 <br />83 82 139.32 393 39.15 86.3 13.8 <br />04/04/11 <br />05/02/11 <br />430 <br />600 515 0.000515 83 <br />82 82.5 140.17 564 40.71 89.8 14.4 <br />05/02/11 <br />06/06/11 <br />600 <br />210 405 0.000405 80 <br />81 80.5 136.77 336 18.61 41.0 6.6 <br />06/06/11 <br />07/11/11 <br />210 <br />200 205 0.000205 81 <br />80 80.5 136.77 839 23.52 51.9 8.3 <br />07/11/11 <br />08/09/11 <br />200 <br />200 200 0.000200 80 <br />81 80.5 136.77 693 18.96 41.8 6.7 <br />08/09/11 <br />08/22/11 <br />200 200 0.000200 80 <br />82 81 137.62 313 8.61 19.0 3.0 <br />10/19/11 <br />10/20/11 <br />- <br />150 150 0.000150 83 <br />82 82.5 140.17 24 0.50 1.1 0.2 <br />TPH-g recovered during rebound test and remainder of 3rd Quarter 2011: 20 3 <br />Cumulative TPH-g recovered: 8,278.3 1,324.6 <br />Notes: <br />ug/I: micrograms per liter <br />kg: kilograms <br />m3/hr: cubic meters per hour <br />kg/m3 : kilograms per cubic meter <br />ft3/min: cubic feet per minute <br />hr: hours <br />TPH-g: total petroleum hydrocarbons quantified as gasoline <br />Advanced GcoEnvironmental, Inc.