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CONVERSION OF UNITS

This workbook has a number of formulas for converting values into the properunits for insertion into the equations. To use these formulas, identify the

conversion "box" which performs the desired conversion. Input the value youwish to convert in the cell beneath the units it already is in "FROM" and

read the converted value in the cell to the right under "TO".

Follow any Special Instructions listed next to the conversion box.(List of molecular weights on second worksheet)

FROM TO

Vapor Concentration Special Instructions

ppmv ppbv1 1000

ppbv ppmv1 0.001

ug/m3 ug/L1 0.001

ppmv Mol Wt. ug/L Input Compound molecular1 97 4.0 weight under Mol Wt.

Mol Wt. ppbv Input Compound molecular1 134 0.179 weight under Mol Wt.

ppbv Mol Wt. Input Compound molecular1 97 4.0 weight under Mol Wt.

ug/L Mol Wt. ppmv Input Compound molecular1 134 0.179 weight under Mol Wt.

ug/L Mol Wt. ppbv Input Compound molecular1 134 179.104 weight under Mol Wt.

ug/L ug/m31 1000

ug/L mg/m31 1

ppmv %1 0.0001

% ppmv1 10000

ug/m3

ug/m3

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Soil Concentration

mg/kg ug/g1 1

ug/kg mg/kg1 0.001

mg/kg ppm1 1

ppm mg/kg1 1

ppm ug/kg1 1000

Water Concentration

ppm ug/l1 1000

ug/l ppm1 0.001

ppb ug/l1 1

ppm ppb1 1000

Diffusion Coefficient

m2/hr cm2/sec1 2.78

cm2/sec m2/hr1 0.36

m2/sec cm2/sec1 10000

Henry's Law ConstantH H'

dimensionless1 41H' H

atm-m3/mol

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dimensionless1 0.0243902439

Pressure

inches Hg atm1 0.0334224599

mm Hg atm1 0.0013157895

inches Hg1 13.2

inches Hg1 0.0757575758

Mass

kg gram1 1000

gram mg1 1000

mg ug1 1000

ug ng1 1000

Flux

1 3.6

1 0.24

Permeability

millidarcies1 9.87E-12

atm-m3/mol

inches H2O

inches H2O

ng/sec-cm2 μg/hr-cm2

μg/hr-cm2 g/day-m2

cm2

Compound Mol Wt.Benzene 78.11Chloroethane 64.52Chloroform 119.381,1-dichloroethane 98.961,2-dichloroethane 98.961,1-dichloroethylene (DCE) 96.94Cis 1,2-dichloroethylene 96.94Trans 1,2-dichloroethylene 96.94Ethylbenzene 106.16Methane 16.043Methylene chloride 84.93Naphthalene 128.17Tetrachloroethylene (PCE) 165.83Toluene 92.141,1,1-trichloroethane (TCA) 133.411,1,2-trichloroethane 133.41Trichloroethylene (TCE) 131.39Vinyl chloride 62.5Xylene 106.16

TPHv - Gasoline Range *100 *estimate