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SOIL REMEDIATION STANDARDS

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Title: SOIL REMEDIATION STANDARDS


1
SOIL REMEDIATION STANDARDS
  • CURRENT DEVELOPMENTS
  • Barry Frasco
  • NJDEP
  • 9/18/02

2
SOIL REMEDIATION STANDARDSLEGISLATIVE HISTORY
  • P.L. 1993 c.139 (S-1070)
  • HAZARDOUS SITE DISCHARGE REMEDIATION ACT
  • P.L. 1997 c.278 (S-39)
  • BROWNFIELD AND CONTAMINATED SITE REMEDIATION
    ACT
  • NEW JERSEY STATUTES ANNOTATED REFERENCE - NJSA
    5810B

3
SOIL REMEDIATION STANDARDSLEGISLATIVE
REQUIREMENTS
  • REMEDIATION STANDARDS TO BE RISK BASED
  • DEVELOPMENT OF RESIDENTIAL AND NON-RESIDENTIAL
    SOIL REMEDIATION STANDARDS
  • DEVELOPMENT OF SOIL REMEDIATION STANDARDS THAT
    ARE PROTECTIVE OF GROUND WATER AND SURFACE WATER

4
SOIL REMEDIATION STANDARDSLEGISLATIVE
REQUIREMENTS
  • STANDARDS TO BE CONTAMINANT SPECIFIC (NO
    CUMULATIVE EFECTS OF MORE THAN ONE CONTAMINANT)
  • PROVISION FOR ALTERNATIVE SOIL REMEDIATION
    STANDARDS BASED UPON SITE SPECIFIC FACTORS
  • UNTIL SOIL REMEDIATION STANDARDS ARE ADOPTED,
    STANDARDS CAN BE DEVELOPED/APPLIED ON A SITE
    SPECIFIC BASIS

5
SOIL REMEDIATION STANDARDSLEGISLATIVE
REQUIREMENTS
  • NO ECOLOGICAL BASED STANDARDS CAN BE PROPOSED OR
    ADOPTED UNTIL THE ENVIRONMENT ADVISORY TASK FORCE
    COMPLETES IT WORK.
  • HOWEVER, ECOLOGICAL BASED STANDRDS CAN BE
    DEVELOPED/APPLIED OF A SITE SPECIFIC BASIS

6
SOIL REMEDIATION STANDARDSCURRENT DEVELOPMENT
STATUS DEVELOPMENT OF GENERIC STANDARDS
  • LAND USE SCENARIOS
  • RESIDENTIAL
  • NON-RESIDENTIAL (WORKER)

7
SOIL REMEDIATION STANDARDSCURRENT DEVELOPMENT
STATUS DEVELOPMENT OF GENERIC STANDARDS
  • EXPOSURE PATHWAYS
  • INGESTION
  • INHALATION
  • IMPACT TO GROUND WATER
  • IMPACT TO SURFACE WATER
  • DERMAL (Cr6 - ALLERGIC CONTACT DERMATITIS)

8
SOIL REMEDIATION STANDARDSCURRENT DEVELOPMENT
STATUS DEVELOPMENT OF GENERIC STANDARDS
  • USING THE TOXICITY FACTOR HIERARCHY FOR THE
    INGESTION/INHALATION PATHWAYS
  • CALCULATE A SOIL REMEDIATION STANDARD FOR BOTH
    CANCER AND NON-CANCER HEALTH ENDPOINTS
  • LOWEST DERIVED STANDARD BECOMES THE GENERIC
    STANDARD FOR THE GIVEN CONTAMINANT

9
SOIL REMEDIATION STANDARDSCURRENT DEVELOPMENT
STATUS DEVELOPMENT OF GENERIC STANDARDS
  • INGESTION PATHWAY INHALATION
    PATHWAY
  • CANCER NON-CANCER CANCER
    NON -CANCER
  • ENDPOINT ENDPOINT
    ENDPOINT ENDPOINT
  • (20 PPM) (500 PPM)
    (100 PPM) (800 PPM)
  • GENERIC SOIL REMEDIATION STANDARD IS THE LOWEST
    LEVEL

10
SOIL REMEDIATION STANDARDSCURRENT DEVELOPMENT
STATUS DEVELOPMENT OF GENERIC STANDARDS
  • MODIFYING FACTORS
  • BACKGROUND
  • CONTAINED IN BROWNFIELD ACT
  • MUST BE NATURAL BACKGROUND
  • IF HEALTH BASED CONCENTRATION IS LESS THAN
    BACKGROUND, GENERIC STANDARD WILL BE SET AT
    BACKGROUND
  • OPTION TO CONDUCT A SITE SPECIFIC BACKGROUND
    DETERMINATION WILL STILL EXIST

11
SOIL REMEDIATION STANDARDSCURRENT DEVELOPMENT
STATUS DEVELOPMENT OF GENERIC STANDARDS
  • MODIFYING FACTORS
  • ANALYTICAL QUANTITATION LIMITS
  • PQLs TO BE BASED ON ACTUAL ANALYTICAL METHODS
    USED
  • IF HEALTH BASED CONCENTRATION IS LESS THAN THE
    PQL, GENERIC STANDARD WILL BE SET AT THE PQL

12
SOIL REMEDIATION STANDARDS DEVELOPMENT OF
GENERIC STANDARDSEXPOSURE PATHWAYS - MODELS AND
ASSUMPTIONS
  • GENERAL ASSUMPTIONS
  • USE OF USEPA MODELS TO THE GREATEST EXTENT
    PRACTICABLE
  • USE OF USEPA DEFAULT ASSUMPTIONS (MAJOR
    EXCEPTION - USE OF NEW JERSEY VALUES OVER
    NATIONAL VALUES)

13
SOIL REMEDIATION STANDARDS DEVELOPMENT OF
GENERIC STANDARDSINGESTION PATHWAY
  • USE OF USEPA MODELS TO THE GREATEST EXTENT
    PRACTICABLE
  • USE OF USEPA DEFAULT ASSUMPTIONS

14
SOIL REMEDIATION STANDARDS DEVELOPMENT OF
GENERIC STANDARDSINHALATION PATHWAY
  • ACCEPTABLE AIR CONCENTRATION DETERMINED
  • CARCINOGENS - UNIT RISK FACTOR (URF)
  • NON-CARCINOGENS - REFERENCE CONC. (RfC)
  • BACK CALCULATION OF WHAT LEVEL IN SOIL WILL NOT
    EXCEED THE ACCEPTABLE AIR CONCENTRATION USING
    COMBINED EMISSION AND DISPERSION MODELING

15
SOIL REMEDIATION STANDARDS DEVELOPMENT OF
GENERIC STANDARDSINHALATION PATHWAY
  • VOLATILIZATION
  • RESIDENTIAL AND NON-RESIDENTIAL MODELS AND
    ASSUMPTIONS ARE SIMILAR
  • DUST GENERATION
  • RESIDENTIAL - BASED ON WIND
  • NON-RESIDENTIAL - BASED ON VEHICULAR TRAFFIC

16
SOIL REMEDIATION STANDARDS DEVELOPMENT OF
GENERIC STANDARDSIMPACT TO GROUND WATER PATHWAY
  • BACK CALCULATION OF THE LEVEL OF A GIVEN
    CONTAMINANT IN WHICH WILL NOT RESULT IN THE
    EXCEEDANCE OF THE GROUND WATER QUALITY STANDARD.

17
SOIL REMEDIATION STANDARDS DEVELOPMENT OF
GENERIC STANDARDSIMPACT TO GROUND WATER PATHWAY
  • DEVELOPMENT OF GENERIC STANDARDS FOLLOWING THE
    EPA APPROACH IN THE SOIL SCREENING LEVELS
    DOCUMENT
  • USE OF A SIMPLE LINEAR EQUILIBRIUM SOIL/WATER
    PARTITIONING EQUATION TO ESTIMATE CONTAMINANT
    RELEASE IN SOIL LEACHATE
  • SIMPLE WATER BALANCE EQUATION TO CALCULATE A
    GROUND WATER DILUTION FACTOR

18
SOIL REMEDIATION STANDARDS DEVELOPMENT OF
GENERIC STANDARDSIMPACT TO SURFACE WATER PATHWAY
  • BACK CALCULATION OF THE LEVEL OF A GIVEN
    CONTAMINANT IN WHICH WILL NOT RESULT IN THE
    EXCEEDANCE OF THE SURFACE WATER QUALITY STANDARD.

19
SOIL REMEDIATION STANDARDS DEVELOPMENT OF
GENERIC STANDARDSIMPACT TO SURFACE WATER PATHWAY
  • NO GENERIC STANDARDS WILL BE PROPOSED AS THE
    MODELS USED ARE HIGHLY DEPENDENT UPON SITE
    SPECIFIC CONDITIONS.
  • ONLY A DESCRIPTION OF THE MODEL(S) TO BE USED
    WILL BE IN THE RULE
  • DEVELOPMENT OF IMPACT TO SURFACE WATER SOIL
    STANDARDS WILL BE DONE ONLY IF THERE IS A
    POTENTIAL FOR SURFACE WATER IMPACT

20
SOIL REMEDIATION STANDARDS DEVELOPMENT OF
ALTERNATIVE REMEDIATION STANDARDS
  • PROVIDED FOR IN THE BROWNFIELDS ACT
    (NJSA 5810B12f)
  • THREE LEVELS OR TIERS
  • GENERIC REMEDIATION STANDARDS USING DEFAULT
    ASSUMPTIONS
  • ALTERNATIVE REMEDIATION STANDARDS USING SITE
    SPECIFIC FACTORS IN LIEU OF DEFAULT VALUES
  • ALTERNATIVE REMEDIATION STANDARDS DERIVED FROM A
    MORE COMPLEX RISK ASSESSMENT

21
SOIL REMEDIATION STANDARDS DEVELOPMENT OF
ALTERNATIVE REMEDIATION STANDARDS
  • AS NOTED IN THE BROWNFIELDS ACT
  • BURDEN OF PROOF OF THE PROTECTIVENESS OF THE ARS
    LIES WITH THE PERSON PROPOSING THE ARS
  • THE DEPARTMENT CAN DEVELOP/IMPLEMENT AN ARS
  • AN ARS CAN BE LOWER THAN THE GENERIC STANDARD

22
SOIL REMEDIATION STANDARDS DEVELOPMENT OF
ALTERNATIVE REMEDIATION STANDARDS
  • FLEXIBILITY TO DEVELOP AN ALTERNATIVE REMEDIATON
    STANDARD EARLY IN THE REMEDIATION PROCESS (I.E.,
    DURING THE SITE INVESTIGATION OR REMEDIAL
    INVESTIGATION STAGES)

23
SOIL REMEDIATION STANDARDS DEVELOPMENT OF
ALTERNATIVE REMEDIATION STANDARDS
  • INGESTION - PRIMARILY GENERIC STANDARDS
  • INHALATION - MIXED USE OF GENERIC AND SITE
    SPECIFIC STANDARDS
  • IMPACT TO GROUND WATER - PRIMARILY SITE SPECIFIC
    STANDARDS
  • IMPACT TO SURFACE WATER - SOLELY SITE SPECIFIC
    STANDARDS

24
SOIL REMEDIATION STANDARDS DEVELOPMENT OF
ALTERNATIVE REMEDIATION STANDARDS
  • NEED TO CONSIDER THE LEAP FROG EFFECT
  • 10PPM 50PPM 100PPM
    200PPM 400PPM
  • GENERIC GENERIC ARS
    GENERIC ARS
  • GW IMPACT INHALATION GW IMPACT
    INGESTION INHALATION



25
SOIL REMEDIATION STANDARDSCOMPLIANCE ISSUES
  • APPLICATION OF SOIL REMEDIATION STANDARDS TO
    DETERMINE IF A SITE IS CLEAN OR HAS BEEN
    REMEDIATED.

26
SOIL REMEDIATION STANDARDSCOMPLIANCE ISSUES
  • ALL POINT COMPLIANCE V. AVERAGING
  • CONCEPT OF FUNCTIONAL AREA
  • MAY VARY WITH LAND USE SCENARIO
  • AVERAGING V. REMEDIAL STAGE
  • CONTAMINATION MUST BE DELINEATED
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