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SRP Community RelationsSite Information ProgramHudson Chromate Project Basis & BackgroundPart 5


Summary of the Basis and Background of the Soil Cleanup Criteria for Triavalent and Hexavalent Chromium (September 19988)
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ATTACHMENT 1: Glossary of Terms and Acronyms

ACD: Allergic contact dermatitis

air model that generates particulate emissions data


Alternative remediation standard

ASTM Method D3987-85:

This is a water extraction procedure that the Department is recommending to determine the solubility of Cr+6 in a given soil or waste and therefore assess its potential to elicit ACD.


Trivalent chromium


Hexavalent chromium

Fick's Law:

a law of chemistry and physics: the rate of diffusion of one substance in another is proportional to the negative gradient of the concentration of the first substance

Hexavalent Chromium Analysis:

The Department strongly recommends the use of the NJDEP Modified SW846 Methods 3060A and 7196A for the analysis of soil for hexavalent chromium. Where background interference is a problem, the Department uses USEPA Method 218.6 (Ion Chromatography) in place of NJDEP Modified SW846 Method 7196A.


Informal interested party review


Integrated Risk Information System


Industrial Source Complex - - Short Term, Version 3 is an air model that generates particle dispersion data


solid-liquid partitioning coefficient


The ratio of the volume of extraction liquid expressed in liters to the weight in kilograms of soil sample being extracted utilizing American Society of Testing and Materials Method D3987-85.


Minimum elicitation threshold

Nonresidential land use scenario:

This represents a typical adult worker exposure at an industrial site and involves a 8 hour working day, 250 working days per year over a 25 year period. This scenario is equivalent to the Restricted Use scenario in Public Law 1997, Chapter 278.

Residential land use scenario:

This represents a typical child through adult exposure at a single home location and involves a 24 hour exposure time, 350 days per year over a 30 year period. This scenario is equivalent to the Unrestricted Use scenario in Public Law 1997, Chapter 278.


Responsible party

Site specific risk assessment:

Risk assessment as set forth in N.J.S.A. 58:10B-12f(1) pursuant to the USEPA Risk Assessment Guidelines for Superfund, Part B.


Soil cleanup criteria or criterion


Soil screening level

Total Cr:

Total chromium is the sum of the hexavalent and trivalent chromium forms. Analytically, it is determined by SW846 Methods 3050B and 6010B or the USEPA equivalent Method 200.8


United States Environmental Protection Agency

USEPA 1312: An extraction procedure simulating the effects of acid rainfall that is being recommended by the Department to evaluate the potential impact of Cr+6 on ground water.