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June 18, 1994 <br /> ADDENDUM TO WORK PLAN FOR <br /> VERIFICATION SAMPLING FOR SITE CLOSURE <br /> FORMER UNION ICE COMPANY FACILITY <br /> 425 NORTH UNION STREET, STOCKTON, CALIFORNIA <br /> At the request of the Union Ice Company, ICF Kaiser has prepared this addendum to <br /> the Work Plan dated March 9, 1994, for the environmental site investigation verification <br /> soil and groundwater sampling for the former Union Ice facility at 425 North Union <br /> Street, Stockton, California. <br /> The additional work activities described in this addendum are designed to meet the site <br /> closure requirements of the San Joaquin County Environmental Health Division. The <br /> previous planned sampling of stockpiled soil at 1320 W. Weber Street (that originated on <br /> the Union Street Property) is hereby deleted from our Work Plan, along with our <br /> previously planned special laboratory OA/QC services. <br /> Groundwater Monitoring Well Installation <br /> Boriniz - In addition to the previously proposed soil borings, a groundwater monitoring <br /> well will be installed just north of the slant boring (Figure 1). Soil samples will be <br /> collected every five feet using a standard penetration tube SPT sam ler and used to <br /> log the subsurface lithology. Once groundwater has been encountered, continuous <br /> sampling will be used for the remainder of the boring (approximately 10 to 15 feet) to <br /> ensure correct placement of the screened interval. The total depth of the well is planned <br /> to be approximately 75 feet. <br /> All lithological samples will be screened for volatile hydrocarbons using an organic vapor <br /> monitor photo-ionization detector (OVM-PID). If field observations and screening of <br /> soil samples with a photo-ionization detector indicate significant petroleum hydrocarbon <br /> concentrations, additional soil samples will be obtained for chemical analysis. <br /> Analytical soil samples, if samples are collected, will be collected in clean brass liners <br /> using a modified California split-spoon sampler. After collection, each brass liner will be <br /> sealed, labeled and immediately placed in a chilled cooler for transportation to American <br /> i Environmental Network, a California certified laboratory. Strict chain-of-custody <br /> procedures will be followed during sample collection and delivery to the laboratory. All <br /> sampling tools will be cleaned with Alconox (a laboratory-grade detergent) and triple <br /> rinsed with de-ionized water prior to use at each location. All drilling equipment will be <br /> steam-cleaned prior to each use. <br /> jmflunionice\addend.wp1 ICF KAISER <br /> 1 <br />