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Guidelines to Determine Site-Specific Parameters for Modeling the Fate and Transport of Monoaromatic Hydrocarbons in Groundwater - The objective of this report is to provide guidelines for determining site-specific parameters to model the fate and transport of dissolved groundwater pollutants. Ground water professionals will find this report helpful in cases where tier-3 assessments need to be conducted, and when additional site characterization is required to inform a choice about corrective action or remediation system design. This report will emphasize modeling the fate and transport of benzene. This decision is based on the facts that benzene is the most toxic of the soluble components of gasoline, is more mobile than the other aromatic hydrocarbons, and is subject to the strictest cleanup standards because of its carcinogenic properties. Thus, benzene concentrations often determine the need for remedial action at LUST sites. Nevertheless, the fundamental principles and procedures discussed herein are applicable to other groundwater contaminants commonly associated with petroleum product releases.
Methyl Tertiary-Butyl Ether (MTBE) Report - The Iowa Legislature passed 1999 Iowa Acts, House File 772 that contains a provision requiring soil and groundwater samples collected at leaking underground storage tank (LUST)site after July 1, 1999, be analyzed for methyl tertiary-butyl ether (MTBE)
A web-based program for acquiring Iowa Geologic Survey Bureau (IGSB)
well searches has been created for use in assessment and monitoring
reports. Once registered, environmental professionals may access the
site to conduct well searches at no charge. To register for the new
application, complete the following:
Within 24 hours you will receive a confirmation email indicating you
have successfully registered to use the system. Well searches obtained
by the new method are acceptable for use in reports effective
immediately. Note: you are required to submit all sections of the well
search report, including the map or aerial photo.
The quality control/quality assurance (QC/QA) procedures used during the site investigation must be at least as stringent as those contained in the IDNR's Leaking Underground Storage Tank Quality Assurance Plan
Copies of IDNR's Leaking Underground Storage Tank Quality Assurance Plan may be obtained by calling 515-725-8336. The groundwater professional must be able to provide IDNR with copies of the QC/QA plan designed for the site, field notes and chain of custody forms on request.