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• • Page 4 of 5 <br /> extraction (SVE)wells inside the C&S One Hour Martinizing dry cleaning facility <br /> located at 5756 Pacific Ave. in Stockton. During our conversation you expressed a <br /> concern that these wells could serve as a conduit for spilled dry cleaning solvents to <br /> the vadose zone and potentially eventually reach down to groundwater below the site. <br /> To minimize the chance of such an occurrence LFR is proposing to construct the wells <br /> with the following features: <br /> 1. A well box that fits snuggly into a small (6") hole cored in the concrete slab to <br /> reduce the circumference of the of the slab/grout interface. <br /> 2. A raised lid that will be above grade by approximately 1/8"to avoid liquid <br /> infiltration that might occur with flush-mounted (or below-grade)well lid (see <br /> sketch on Attachment 1 — if the lid specified in the sketch [Enviroequip FM 150] <br /> 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 <br /> Attachment 2). <br /> We propose to hand-auger the boreholes with a 4" bucket. The top 6"of the borehole <br /> (possibly up to 24")will be 6" in diameter. The well will be constructed using standard <br /> methods (not a pre-pack). <br /> Please notify me if the wells as sketched and described here will meet with your <br /> approval. I will have a check made out for$89.00 for the monitoring well permit plus <br /> $315.00 for three hours of inspection time to the SJ County Environmental Health <br /> 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 <br /> 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@lfcc_omvisit us at www.lfr.com <br /> NOTICE: This e-mail and any files transmitted with it are the property of ARCADIS <br /> U.S., Inc. and its affiliates.All rights, including without limitation copyright, are <br /> reserved. The proprietary information contained in this e-mail message, and any files <br /> transmitted with it, is intended for the use of the recipient(s) named above. If the <br /> 7/8/2009 <br />