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• Former EZ Serve #100878, Manteca <br /> TABLE 2 <br /> Calculations for Residual Dissolved Phase Hydrocarbons as TPH as gasoline <br /> in Saturated Zone for Samples Collected in December 1998 <br /> Y:= (ATC}n <br /> Where <br /> V=Volume of residual dissolved phase hydrocarbons as TPH-G in water(gallons) <br /> A=Maximum estimated area(ft2)of impacted groundwater (See Figure 3) <br /> T=Maximum estimated thickness(ft)of impacted groundwater in Sat Zone <br /> C=Average benzene concentration(ug/1) <br /> n=Soil Porosity(assume 35%) <br /> Volume ID Area (A)in ft2 <br /> (see Fig 3) (see Figure 2) Thickness )in ft Volume V) in ft3 <br /> V1 5427 1 10 54270 <br /> V2 13216 10 132160 <br /> Calculations(C)for maximum TPHgas concentration in groundwater <br /> for samples collected in April 1998(Refer to Figure 2 for sample locations) <br /> Average TPHgas <br /> Volume ID Concentration <br /> (see Fig 3) Sample ID (u /L <br /> V1 MW-1 2200 <br /> vi MW-5 1800 <br /> V i -Average TPHgas Concentration(u /L)= 2000 00 <br /> V2 MW-2 110 <br /> V2 MW-3 <50 <br /> V2 1--MW-8 <50 <br /> V2-Average TPHgas Concentration(u /L)T 3667 <br /> V = (ATC)nj <br /> Volume ID ` <br /> (see Fig 3) Area T(ft) €€ C(u /L) n(35%) V(ug) <br /> V1 5427 10 1 2000 0 35 I 37989000 <br /> V2 13216 10 00 37 1 0 35 1696207 52 <br /> (ligallon/ 608 lb II <br /> V u ) (27 27 L/ft3) (1 m/lw u ) llb/453 6 m) hexane) V( allons) <br /> 37989000 00 1035960030 00 103596 1 228 1 0 37 037 <br /> 1696207 52 I 46255579 07 4626 1 010 1 002 002 <br /> Sum= 039 <br /> I I I 1 <br /> I <br /> 38 gallons <br /> Max volume in gallons of Idissolved phase hydrocarbons asTPHgas for groundwater sampled 12198 0. I <br /> Is I II II 1 ' <br /> , 1 { <br />