VIAP CALCULATOR RELEASE FOR EVALUATION PURPOSES ONLY

Michigan Department of Environment, Great Lakes, and Energy sent this bulletin at 01/26/2018 05:32 PM EST

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As part of the ongoing process to update the Cleanup Criteria Rules, the proposed rule revisions include a tiered approach to address the Volatilization to Indoor Air Pathway (VIAP). The proposed tiered approach allows a person to utilize facility-specific site conditions to develop generic volatilization to indoor air criteria (VIAC). The generic VIAC are used to evaluate risks to human health and self-implement response activities.

The MDEQ is developing a VIAP calculator as a tool to assist in the implementation of the proposed rules associated with the VIAP. An operating version of the trial calculator is being provided to give users an opportunity to discover how varying inputs to the calculator under the proposed tiered approach affect the resulting criteria. A version of the trial calculator, including the scripts and coding, is also provided for those interested. With rule promulgation, the MDEQ intends to issue a final version of the calculator that is web-based.

Calculator results may not be used for pathway compliance determinations. Results do not represent MDEQ-approved site-specific criteria. Therefore, submittals to the MDEQ may not rely upon calculator results.

The calculator was developed with Microsoft ® Excel 2016 and may not work on other programs or on other versions of Excel. Sample results are provided to assist in verifying the calculator results from your system.

 

While the release of the Excel version of the calculator for evaluation is provided to assist in understanding the proposed rules, any public comments on the proposed cleanup criteria rules for VIAP must address actual rule provisions. The calculator as a tool to implement the proposed rule is not part of the rules package. Therefore, comments regarding how the calculator operates are outside of the rule making process and need not be provided as an official comment on the proposed rules.

 

If you have specific comments or questions regarding the calculator, please contact Christine Flaga flagac@michigan.gov.