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Page 1 of 2 <br />Nuel Henderson [EH] <br />From: Nuel Henderson [EH] <br />Sent: Thursday, January 18, 2007 2:05 PM <br />To: 'rmarty©advgeoeny.com' <br />Cc: Harlin Knoll [EH]; Margaret Lagorio [EH]; Lori Duncan [EH]; Jim Barton (E-mail) <br />Subject: RE: Waterloo Food & Fuel <br />Bob, <br />Your summary of the points of agreement is generally good. Other issues discussed or agreed on include <br />EHD's willingness to approve the four proposed shallow GWE wells on the west portion of the subject site, but will <br />require a justification and cost/benefit analysis for the four proposed deeper GWE wells before approving their <br />installation. The data from —185 feet bsg should be reexamined to evaluate the appropriateness of installing a <br />single screen well in the 185-foot zone in the source area. The WFS well MW-7 (deep), upgradient to the site is <br />impacted by MTBE. <br />The necessity for additional upgradient wells should be reevaluated, perhaps using some WFS MWs or data can <br />achieve the desired goal of up-gradient delineation. <br />Nuel <br /> Original Message <br />From: Robert Marty [mailto:rmarty@adygeoenv.com] <br />Sent: Thursday, January 18, 2007 12:36 PM <br />To: Nuel Henderson [EH] <br />Cc: 'Jim Barton'; Harlin Knoll [EH]; Margaret Lagorio [EH]; Lori Duncan [EH]; 'bill' <br />Subject: Waterloo Food & Fuel <br />Nuel: <br />Thank you for your input regarding the Waterloo Food & Fuel site yesterday; I believe the <br />meeting was productive in moving the project along and getting our arms around the extent of <br />impacts. The following is a brief summary of the action items that evolved out of our meeting <br />yesterday. <br />AGE will submit a Work Plan Addendum or (Work Plans) for the following: <br />Installation of "in-fill" or "in-board" wells to continue assessment of impacted ground water. <br />These wells will include one to be installed near the northeast corner of the "Arroyo's" site <br />(pending approval from the property owner). <br />Advancement and sampling of a "transect" of CPT borings in a generally north-south direction, <br />west-southwest of the subject site. <br />- Vertical definition of impacts in the source area (on-site). <br />Soil vapor intrusion sampling/evaluation, particularly along south side of property. <br />After the CPT results have been evaluated, we will determine the number and locations of <br />additional monitoring wells in a generally down-gradient direction. <br />Also: I researched the identification of other possible sources; evidently, quite some time ago, we <br />did some historical research in the area of the site to determine if there were any additional <br />sources (e.g. old gas stations). There are no Sanborn Fire Insurance maps available for the area <br />1/18/2007