SITE INFORMATION AND CORRESPONDENCE_1

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Del Monte F-oods.— Research Center 205 North Wiget Lane (94598-2458) P.O. Box 9004 � Walnut Creek; CA 94598-0904 Telephone: (510) 944-7300 FAX: (510) 945-7453 April 30, 1996 Hand Delivered 5/1/96 Margaret Lagorio Site Mitigation Unit Public Health Services San Joaquin County ` 304 E. Weber Ave., Third Floor I Stockton, Ca. 95201-0388 RE: Response To Letter From PHS/EHD To Del Monte Dated 2/20/96 - Disco Site Dear Ms. Lagorio: Enclosed is the Del Monte response to the letter that was addressed to Soon Kim on February 20, 1996. As you know, Soon no longer works for Del Monte, and I have responsibility for his projects - including the Disco site. I would like to comment on what has happened at the site since early March to demonstrate that we have been active, even though the system has not been operating, before I discuss the response to the PHS/EHD letter. After shutting the system down, we had several meeting/discussions with Bern Baumgartner, Grant Stewart, and Don Light, and finished with an on site meeting between Grant, Don,.and myself. Recommendations were developed that should increase the life of the carbon by reducing the water uptake by the carbon. As this involved the addition of a simple heat exchanger and as a result of an inspection by the San Joaquin Valley Unified Air Pollution Control District (SJVUAPCD), I submitted an application for a modified Permit To Operate. We have completed some minor piping changes, added the heat exchanger, changed the carbon in both tanks, and are in the process of installing insulation to the piping after the extraction wells and to the two carbon tanks. We will be ready to start up again as soon as SJVUAPCD issues the modified Permit To Operate. In response to the PHS/EHD letter, I requested CH2M Hill to respond to the technical questions and I have a copy of their response enclosed. I planned to address those items that Soon Kim might have had the best knowledge of what happened at the site and I still plan to do so, but I started"late and Soon has been in Europe for the last month, so my response will have to come a little later. This will include a description of the soil and purge water generated from the monitoring well, the analyses, and the disposition. We will also furnish a detailed schematic of the system.