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<br /> Nuel Henderson [EH]
<br /> From: Nuel Henderson [EHJ
<br /> Sent: Friday, January 11, 2013 11:31 AM
<br /> To: 'todd.hafner@cardno.com'
<br /> Cc: 'Barton, Jim@Waterboards';Adrienne Ellsaesser[EH]
<br /> Subject: RE: Monitoring Well Destruction
<br /> Todd,
<br /> I've reviewed the groundwater data and a limited amount of soil data to address your request.Assuming
<br /> that there is no impacted soil in the vicinity of the wells, a can agree to pressure grouting JLM-4, 12, 14,
<br /> 15, 16, 17, 18, 19, 24, and 25. JLM-20 and JLM-26 each have impacted groundwater and must have the
<br /> well contents removed. Your proposal to overdrill JLM-3, 5, 13, 21, 22 and 23 is acceptable. Please verify
<br /> that soil in the areas of wells proposed for pressure grouting is not impacted in your work plan.
<br /> Nuel Henderson
<br /> From:Todd Hafner [mailto:todd.hafner@cardno.com]
<br /> Sent:Thursday,January 10, 2013 5:34 PM
<br /> To: Nuel Henderson [EH]
<br /> Cc: John Yoakum [EH]
<br /> Subject: Monitoring Well Destruction
<br /> Hi Nuel,
<br /> I am in the process of preparing a well destruction workplan at the request of Jim Barton for J&L Market
<br /> located at 8125 South EI Dorado Street in French Camp and would like your recommendation/approval with
<br /> regard to destruction methodology before it is submitted. Eighteen monitoring wells and two ozone sparge
<br /> wells associated with the site will be destroyed. The monitoring wells are installed to depths ranging from
<br /> approximately 36.5 to 140.6 feet, and the ozone sparge wells are each installed to a depth of approximately
<br /> 35 feet. Seven monitoring wells are installed inside steel conductor casing.The conductor casing was
<br /> installed to depths ranging from approximately 57 to 96.5 feet.
<br /> In an effort to reduce costs, I am proposing to destroy wells JLM4,JLM12, JLM14,JI-Ml 5,JLM16,JLM17,
<br /> JLM18, JLM19, JLM20,JLM24,JLM25, and JLM26 by pressure grouting and destroying JLM3,JLM5,
<br /> JLM13, JLM21, JLM22,JLM23,and the two ozone sparge wells by overdrilling.The vast majority of
<br /> impacted soil was removed prior to the installation of all but three monitoring wells.Attached is a table of
<br /> groundwater quality data associated with the wells. Please let me know if my proposed approach is
<br /> acceptable. Mr. Barton would like to review the completed workplan next week. Let me know if you have any
<br /> questions.
<br /> Todd Hafner, P.G.
<br /> SENIOR GEOLOGIST
<br /> CARDNO ATC
<br /> Cardno`
<br /> ATC
<br /> Shaping the Future
<br /> Phone(+1)209-579-2221 Fax(+1)209-579-2225 Mobile(+1)209-662-0899
<br /> Address 1117 Lone Palm Avenue, Suite B, Modesto, CA 95351
<br /> Email todd.hafner@cardno.com Web www.cardnoatc.com-www.cardno.com
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<br /> 1/29/2013
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