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eilta Environmental Consultants, Inc. 1801 HigI hway 8. Suite 114 ,St. Paul,, MN 55112 6121636-2'1427 FAX:1612/636,-8552 September 7, 1990 Mr. is Jopke City of Roseville 2660 Civic Center Drive Rosm"lle,, MN 55113 Subject: Ground Water/ Contamination Sub-Surtace erred Lion System B-Dale Amoco, 2164 North Date Street Roseville, Minnesota Delta Nol. 10� 535 LZ Enclosed are 25' copies of the plans, for the remediation, system, at the referenced site. Defta Environmental Consultants,, Inc. (Delta), on behalf of Amoco Oil Company, is requesting permission, to implement construction of the remedi"ation, system. , o _ 4 As we discussed in, our meeting on, Wednesday, August 291, 1,9901,, leaking distribu -n tion !4!mk- underground storage to have contaminated, the local ground water and sub-surface so-fis. '11-Ae lines and tanks, have been replaced but some contamination remains. A soil venting system will address the issue, of sub -soil contamination. A ground water recovery system will address the ground water contarmination. During the operation of the soil vent system, air is drawn through the soils and removed by extraction points, which are plumbed into a, vacuum blower. Ile blower, and piping manifold are housed in a treatment building. The vapors removed by the vacuum blower are exhausted to the atmosphere. The locations of the extraction, vents and the treatment building are shown in Figures 1 and G-3.2. The treatment building is constructed of wood With vinyl siding. It houses the equipment required for the remediati,on process,. the layout of equipment in the interior of the building is shown in Figure U. The construction specifications of the 'building are shown in Figure Al. The building will be set on a concrete pad with a blerm,ed edge. The berm will have a containment volume Pir�&ical Solutions to Environmental Concerns