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1 <br /> Regional Office <br /> INTERNATIONAL <br /> 4585 Pacheco Boulevard <br /> TECHNOLOGY 7 1, it, <br /> Martinez,California 94553-2233 <br /> CORPORATION 510-372-9100 <br /> Fax;510-372-5220 <br /> ptl 12- 31 <br /> L July 3, 1997 <br /> Ms. Mary Meays, REHS <br /> Senior Registered Environmental Health-Specialist <br /> Public Health Services <br /> San Joaquin County <br /> Environmental Health Division <br /> 304 E. Weber Street <br /> U Stockton, CA 95201 <br /> Groundwater Monitoring Letter Report - Site Code 22073 <br /> L 1400 Waterloo Road Stockton <br /> ' Dear Ms. Meays: <br /> IT Corporation (IT)was retained to perform groundwater monitoring at the Lipton (formerly Van l <br /> den Bergh Foods Company) facility (Site Code 22073), located in Stockton, California. The field <br /> work was performed on June 30, 1997. <br /> The monitoring included measuring the groundwater levels in the six monitoring wells at the site, <br /> sampling groundwater in one monitoring well (MW-4) located adjacent to the former leaking <br /> E underground storage tank, and analysis of the sample for total petroleum hydrocarbons (TPH) as <br /> diesel. This monitoring was requested by San Joaquin County Public Health Services, Environmental <br /> Health Division(PHS/EHD)as a final corrective action at the site. The objective of the sampling was <br /> to measure the concentration of TPH as diesel in the groundwater immediately below the former <br /> diesel source. <br /> Field Activities <br /> The field,activities.were initiated with a Tail ate. Safet 1Vleetin to identi and discuss otential <br /> g :. y g fY p <br /> health and.safety hazards associated witlr the monitoring activity.''Subsequently, the groundwater <br /> depth in each well was measured using a water-level meter. <br /> ;Approximately three a well volumes of groundwater(22 gallons)Were,theri.purged from monitoring <br /> well MW-4 us" n' .an unused dis osable�bailer. Groundwater parameters including pH, electrical <br /> _ <br /> conductivitv..dissolved oxygen and temperature.:were nlanitored, and stabilized during purging. A <br /> groundwater sample was then.collected in two one,liter glass:amber bottles: The bottles were labeled, <br /> A� <br /> sealed.and packed in an ice-box cooler that was maintained at a temperature of approximately 4°C <br /> using water-ice, until it was delivered-to McCampbell Analytical Inc. (DHS Certification No. 1644), r <br /> ! Tr Corporahon is a wholly owned subsidiaay of International Technology Corporation - I <br /> Znh. <br />