Laserfiche WebLink
i <br /> CALCULATION OF HYDROCARBON MASS DISSOLVED IN GROUNDWATER <br /> Ranch Market- Riverbank <br /> 23569 South Santa Fe Road <br /> Riverbank, CA October 11, 2000 <br /> These mass calculations were conducted based on Figure 10 and the last quarter of data presented in Table 2 <br /> AREA 1 A 250 sq ft area around the former tank pit and well MW-1 <br /> Estimated avg concentration of 159,000 ug/1 <br /> AREA 2 A 9,200 sq ft area outside of AREA 1 and including MW-2, MW-3, and MW-4 <br /> Estimated avg concentration of 32,330 ug/1 <br /> AREA 3 A 17,400 sq ft area outside of AREA 2 and including MW-5 and MW-5D <br /> Estimated avg concentration in this area is 318 ug/1 <br /> I AREA 4 Remainder of the impacted area (approximately 41,800 sq ft) defined by wells MW-9, GP-3 <br /> Estimated avg concentration in this area is 62 ug/l <br /> AREA 1 AREA 2 AREA 3 AREA 4 <br /> CONTAMINANT TPHg TPHg TPHg TPHg <br />' X - CONTAMINANT CONCENTRATION (mg/1-) = 159 3233 0 318 0 062 <br />' N -POROSITY (%) = 038 038 038 038 <br /> A - IMPACTED AREA (ft^2) = 250 9,200 17,400 41,800 <br />' H - HEIGHT OF IMPACTED AREA (ft) = 10 30 30 30 <br /> P - POUNDS OF CONTAMINANT(lbs) = 9.43 211.69 3.94 184 <br /> Estimated Total Mass of Dissolved Hydrocarbons; 226.9 pounds +/- 50% =(52 to 156) <br /> IEstimated Volume of Dissolved Hydrocarbons: 32.4 gallons +/- 50% = (7.4 to 22.2) <br /> areamass wk4 <br /> 0 <br /> I <br /> i <br />