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Mass-Volume Calculations of Recovered Hydrocarbons <br /> THATER PROPERTY (former TUCKER CONSTRUCTION) <br /> 336 East Locust Street, Lodi, California <br /> Assumptions: <br /> Utilizing analytical data collected from soil-vapor samples (Table 4) and field measurements (Table 2), <br /> the average concentration of recovered hydrocarbons at the site can be approximated. <br /> The mass of hydrocarbons removed during the operating period can be calculated using the following <br /> equation: <br /> M = c • Q •t <br /> Where: M = cumulative mass recovered (kg) <br /> C = soil-vapor concentration (kg/M3) <br /> Q = extraction flow rate (M3 1h r) <br /> t = operational period (hrs) <br /> The average influent concentration of total petroleum hydrocarbons quantified as gasoline (TPH-g) <br /> and average flow rates during each weekly time interval were utilized to calculate the approximate <br /> mass/volume of extracted TPH-g. <br /> 05 to 12 February 2007 <br /> TPH-g detected in this time interval (pg/1): 1 1,9001 6,1001 1 <br /> Flow rates measured in this time interval (scfm): 1 38.01 38.01 60.0 45.0 <br /> C = Average TPH-g concentration: 4,000.0 pg/I = 0.004 kg/m3 <br /> Q = Average flow rate: 45.3 scfm = 76.9 M3/hr <br /> t= Operational period: 59 hrs <br /> Pounds (lbs) of TPH-g recovered: 40.0 lbs <br /> Gallons of TPH-g recovered: 6.4 gallons <br /> 12 to 19 February 2007 <br /> TPH-g detected in this time interval (pg/1): 1 6,1001 6,6001 1 <br /> Flow rates measured in this time interval (scfm): 45.01 50.01 1 <br /> C =Average TPH-g concentration: 6,350.0 pg/l = 0.00635 kg/m4 <br /> Q= Average flow rate: 47.5 scfm = 80.7 M3/hr <br /> t = Operational period: 66 hrs <br /> Pounds (lbs) of TPH-g recovered: 74.6 lbs <br /> Gallons of TPH-g recovered: 11.9 gallons <br /> Advanced GeoEnvironmental,Inc. <br />