Letter Health Consultation: Kinder-Morgan Facility in North Gila Valley, Yuma, Arizona

摘要

We received your request via Ms. Sheila Stoeller at Arizona Corporation Commission and Mr. Brian Davison at Arizona Department of Environmental Quality. It is our understanding that Kinder-Morgan installed monitoring wells around its Yuma Booster Station, which is surrounded by agricultural fields. Two of the monitoring wells (MW-6 and MW-7) are located on the North Gila Thomas estate property. The purpose of the monitoring wells is to provide early detection of potential contaminants associated with the pipeline running through the agricultural fields. This pipeline is from Colton, CA to Phoenix, AZ. It is also our understanding that MACTEC Engineering and Consulting, Inc. (MACTEC) has provided laboratory data to you since April 2005. However, the recent elevated readings of Volatile Fuel Hydrocarbons (VFH), Benzene, Toluene, Ethyl benzene, total Xylenes, and Methyl-tert-butyl Ether (MTBE) have caused your concern. We have reviewed the groundwater sampling data collected from the two monitoring wells (MW-6 and MW-7) and conducted an assessment to evaluate whether the chemicals are at levels of public health concern.