Air Concentration Criteria
Stakeholder Consultation Session February 27 and 28, 2008
Glyn Fox Glyn.Fox@gov.bc.ca
Land Remediation Section - Environmental Management Branch
ACC Update Outline Comments Received Analytical Methods Volatile Definition “Look up” Tables VPH/LEPH Implementation timeline
Land Remediation Section - Environmental Management Branch
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ACC Update – Comments Received Three Main Areas Remove ecological assertion requirement Clarify text relating to role/use of ACC Ancillary technical questions
(e.g. source for TRVs, definition for volatility, use in risk assessment, etc.)
No negative comment on derivation method
Land Remediation Section - Environmental Management Branch
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ACC Update - Ecological Assertion
Assertion Purpose Legal not technical
Ministry makes no warranty for ecological health for sites remediated based on human health standards
Ministry has now eliminated all requirements related to Eco assertion Replaced with “advisory” in CSR instruments
Certificate of Compliance Preliminary Determination Final Determination
Land Remediation Section - Environmental Management Branch 4
ACC Update – Analytical Methods
Ministry currently lacks official analytical methods for Table 1 ACC substances BCLQAAC Air methods task group
Likely existing US EPA/NIOSH methods will be adopted on interim basis
Adjust ACC for analytical detection limits
Task Group will address standardization of laboratory air method detection limits
Land Remediation Section - Environmental Management Branch
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ACC Update – Volatile Definition
Adjust ACC for volatility Use US EPA Region 6/9 PRG volatile definition
Mol. wt. < 200 g/mole
H’ > 1E-5 atm-m3/mole
Land Remediation Section - Environmental Management Branch
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ACC Update – Culled Substances
Will cull following substances from ACC Table 1 Benz[a]anthracene Benzo[b]fluoranthene Benzo[k]fluoranthene Benzo[a]pyrene 2-chloroacetophenone Chrysene Dibenz[a,h]anthracene Fluoranthene Indeno[1,2,3-cd]pyrene Maleic hydrazide Methomyl Polychlorinated biphenyls (PCBs)
Land Remediation Section - Environmental Management Branch
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ACC Update – “Look up” Tables
Supplement ACC Table 1 criteria with look up tables pre-calculated soil Vapour concentration (Cv) values corrected for depth related attenuation Add ACC for VPH and LEPH Use SAB/Health Canada “surrogates” Combine SAB C6-C8 and C8-C10 = VPH Combine SAB C10-C12 and C12-C16 = LEPH Adjust for 80:20 aliphatic/aromatic split
Land Remediation Section - Environmental Management Branch
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ACC Update – Implementation
Form of Criteria ? Director’s Interim Criteria Minister’s order Timeline ? Summer Fall Winter 2008 2008 2008 – – – – – Approve Air Analytical methods Complete 2nd Draft ACC Post ACC for public comment Finalize Approve and Issue – 1 year lifespan – Permanent
Land Remediation Section - Environmental Management Branch
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