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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
AP-42:

air model that generates particulate emissions data

ARS:

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.

Cr+3:

Trivalent chromium

Cr+6:

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.

IIPR:

Informal interested party review

IRIS:

Integrated Risk Information System

ISCST3:

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

Kd:

solid-liquid partitioning coefficient

LSR:

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.

MET:

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.

RP:

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.

SCC:

Soil cleanup criteria or criterion

SSL:

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

USEPA:

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.