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• • Page 1 of 2 <br /> Mike Infurna [EH] <br /> From: MacLeod, Max [Max.MacLeod@lfr.com] <br /> Sent: Wednesday, July 01, 2009 3:10 PM <br /> To: Mike Infurna [EH] <br /> Cc: Seyfried, Scott; Goldstein, Lucas <br /> Subject: Four proposed soil vapor wells, 10'- 10.5'deep at Robinhood plaza <br /> Attachments: Attachment 1.pdf; Attachment 2.pdf <br /> Mr. Infurna: I spoke with you a few weeks ago about installing four soil vapor extraction (SVE)wells inside the <br /> C&S One Hour Martinizing dry cleaning facility located at 5756 Pacific Ave. in Stockton. During our conversation <br /> you expressed a concern that these wells could serve as a conduit for spilled dry cleaning solvents to the vadose <br /> zone and potentially eventually reach down to groundwater below the site. To minimize the chance of such an <br /> occurrence LFR is proposing to construct the wells with the following features: <br /> 1. A well box that fits snuggly into a small (6") hole cored in the concrete slab to reduce the circumference of <br /> the of the slab/grout interface. <br /> 2. A raised lid that will be above grade by approximately 1/8"to avoid liquid infiltration that might occur with <br /> flush-mounted (or below-grade)well lid (see sketch on Attachment 1 —if the lid specified in the sketch <br /> [Enviroequip FM 150] is not be available, another small diameter lid will be used). <br /> 3. Use of an "Enviro Cap" casing plug that requires unique tool to remove cap (see Attachment 2). <br /> We propose to hand-auger the boreholes with a 4" bucket. The top 6"of the borehole (possibly up to 24")will be <br /> 6" in diameter. The well will be constructed using standard methods (not a pre-pack). <br /> Please notify me if the wells as sketched and described here will meet with your approval. I will have a check <br /> made out for$89.00 for the monitoring well permit plus $315.00 for three hours of inspection time to the SJ <br /> County Environmental Health Department along with a completed well permit application (please verify that these <br /> are the correct fees). Thank you for your assistance with this project. Sincerely, Max MacLeod <br /> E.Max MacLeod,P.E. <br /> Senior Project Engineer <br /> LFR an ARCADIS company <br /> 1900 Powell Street,12th Floor <br /> Emeryville,California,94608-1827 <br /> 510-596-9684 Direct Dial <br /> 510-652-4500 Main Number <br /> 510-316.6115 Mobile <br /> 510-652-4906 Facsimile <br /> max macleod@Ifr.comvisit us at www Ifr com <br /> 7/2/2009 <br />