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ENVIROl'�VIENTAL HEALTH`` EPARTMENT oA°u'" SAN JOAQUIN COUNTY z: G Unit Supervisors Donna K. Heran, R.E.H.S. Director 304 East Weber Avenue,Third Floor Carl Borgman,R.E.H.S. L11 Al Olsen, R.E.H.S. Stockton,California 95202-2708 Mice Huggins, R.E.H.S.,R.D.I. • �.. P• Program Manager Telephone: 209 468-3420 Douglas t Wilson,Lagorio,R_E.H.E.H.S one: p � ) Margaret R.E.H.S.. Laurie A. Cotuila, R.E.H.S. Program Manager Fax: (209) 464-0138 Robert McClellon, R.E.H.S. Website:www.sjgov.org/ehd/ Jeff Carruesco, R.E.H.S. MICHAEL MCCREIGHT DEC 0 9 20M COMPASS GROUP USA 2400 YORKMONT RD CHARLOTTE NC 28217 RE: Canteen Corporation Facility #1757 Site Code: 1727 1500 Shaw Road RO#: 000104 Stockton, CA 95205 Clean Up Fund#: 16536 On November 30, 2005, the San Joaquin County Environmental Health Department (EHD) conducted a site inspection with your consultant, Delta Environmental's Eric Muehlberger, and has the following comments. The EHD was notified by Mr. Muehlberger that this inspection was planned and requested our presence. The soil vapor extraction (SVE) unit construction.was done and the unit was to be placed online soon. The air sparge (AS) unit construction was nearing completion and was due to be online soon as well. With the piping installation to the wellheads complete, the EHD took this opportunity to inspect a representative number of the vapor wells (VE-1 thru VE-5) and air sparge wells (AS-1 thru AS-13), as well as the monitoring wells onsite for construction damage and compliance with the San Joaquin County Well Standards. On inspection, it was noted that all of the inspected vapor wells and air sparge wells lacked an adequate grout seal inside the traffic box. Only gravel was present inside these traffic boxes, and all had penetrations into the 'skirt' sheet metal, which could allow liquids to migrate into the box from the surface and then downward through the gravel. The EHD did not require the interiors of the traffic boxes to be grouted initially, as mandated by our Well Standards, so that additional construction (trenching for SVE/AS piping) could occur. Unfortunately, the interiors of the traffic boxes were not grouted when they were set. The EHD requires that grout seals be added to the interior of every (VE, AS, and MW) traffic box/well-head. As guidance, the grout for every well should extend up into the lower half of the inner traffic box skirt and the PVC casing should extend slightly higher, into the upper half of the inner traffic box skirt. In addition, any penetrations into the traffic box `shirt' are to be sealed with a non-petroleum sealant, and the traffic box is to be watertight.