COMPLIANCE INFO_2008-PRESENT - Laserfiche WebLink

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Muniappa Naidu [EH] From: Nathan Schumacher [NSchumac@dtsc.ca.gov] Sent: Monday, September 29, 2008 2:51 PM To: Muniappa Naidu [EH] Cc: Sam Martinez Subject: Fwd: Re: request- Gordon Research Property, Manteca, CA As requested. Nathan Schumacher Public Participation Specialist DTSC 8800 Cal Center Drive Sacramento CA 95826 (916) 255-3650 Toll Free (866) 495-5651 >>> Sam Martinez 09/25/2008 9: 16 AM >>> Dear Mrs. DeLoach, Thank you for your note regarding the on-going removal at the Gordon property. At this point, however, not aware DTSC does not know of any release from the Gordon property or any actions that potentially could have contaminated or altered the flow of the groundwater into your well. Based upon available information, the predominant groundwater flow in this area is generally from the south-south east to the north-north west. Work to date at the site includes the classification of material, packaging and proper storage of containers which were previously stored in an open uncontrolled manner. The containers are stored in locked containers. Efforts are underway to identify the appropriate disposal facilities for the containers. The unidentified, unlabeled containers held liquids and solids, the field identification methods resulted in the preliminary identification of the following compounds as constituents of potential concern: -- Benzene, toluene, xylene, and ethylbenzene (components of gasoline and many other petroleum solvents) ; -- Trichloroethane, acetone, methyl ethyl ketone, and methyl isobutyl ketone; -- Metals such as mercury, chromium, lead, and arsenic. As you are aware, the only confirmed spill at the Gordon Property was a spill of mercury a concrete floor within one of the outbuildings. Once these identified wastes are removed from the Site, sampling of soil in areas that have the highest potential for contamination will occur. The sampling will also include an overall systematic sampling to determine if other areas are impacted, and to insure that all appropriate measures are taken. During this sampling it is expected that the on-site well may be sampled. With respect to the testing of the water produced by your well, U.S EPA recommends that well owners annually test for total coliform bacteria, nitrates, total dissolved solids, and pH levels. While DTSC has no soil sampling to support the sampling of your well for the constituents of potential concern, should you desire to test for the above constituents of potential concern, the U.S. EPA maintains a reasonable amount of information for private well owners including this resource and links for the appropriate analytical methods: http://www.epa.gov/safewater/methods/analyticalmethods.html We recommend checking that any laboratory used be accredited by the State of California, a listing of accredited laboratories is found at: http://www.cdph.ca.gov/certlic/labs/Pages/ELAP.aspx Please note that labs are accredited for specific analytical methods and it is often most economical to find a lab that can perform all of the analyses desired and provide the sample collection containers. You are correct in your presumption that valid sample collection and analysis includes a limited time period between collection and analysis, it is best to deliver samples to the laboratory on the date of collection. 1