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plume boundary, and 4) the dissolved concentration of benzene is less than 1,000 ug/I, and <br />the dissolved concentration of MTBE is less than 1,000 ug/I. In relation to other criteria for <br />closure, a sensitive receptor survey has been completed for the site, and the supply or <br />surface water features that were identified are not likely to be impacted by the remaining <br />impact at the site. Soil -vapor sampling has also been completed, as required, for the site. <br />Lastly, the residual impact in soil and groundwater at the site should continue to naturally <br />degrade. <br />In conclusion, AGE believes that the additional directed assessment is not necessary or warranted <br />and would not provide additional useful data that is necessary to evaluate the site for closure. AGE <br />requests that the Water Board consider rescinding the directive for additional site assessment <br />outlined in the 06 August 2018 letter. <br />Should you have any questions regarding this email, please do not hesitate to contact our offices. <br />Regards, <br />AdvancedGeo <br />Environmental <br />n� <br />M EmpbyrY owrxNCo mp�ly <br />Daniel Villanueva <br />Senior Project Geologist <br />Advanced GeoEnvironmental, Inc. <br />Environmental • Compliance • 1ndus&w1Hygiene • Geotechnical <br />Phone: 800-511-9300 <br />Fax: 888-445-8786 <br />dvillanueva@advgeoenv.com <br />www.advgeoenv.com <br />IX/orlang in Partnership with People, Business and the Environment" <br />This emaiVfax message is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, <br />use, disclosure or distribution of this emaiVfax is prohibited. If you are not the intended recipient, please contact the sender by email/fax and destroy all <br />paper and electronic copies of the original message. <br />From: Buehler, Alan@Waterboards <Alan.Buehler@Waterboards.ca.gov> <br />Sent: Tuesday, October 16, 2018 8:46 AM <br />To: Daniel Villanueva <dvillanueva@advgeoenv.com> <br />Subject: Ralph's Square <br />Daniel — <br />I just wanted to follow up on the status of your response to my request for a Work Plan. Per my 8/6/18 letter, it was <br />due 10/12/18. <br />Mann, M. gueKer, P.G. <br />Engineering Geologist I UST Enforcement Unit <br />Central Valley Regional Water Quality Control Board <br />