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f'r The water samples were transferred into two sterilized, glass, 40 m1 VOA sample containers a � and a 500 ml amber glass bottle. The samples were immediately sealed in the field with F Teflon-lined threaded caps ensuring an airtight seal. The samples were labeled appropriately in the field. Labels included: sample location, depth, date, time, job number, and field identification number. ' i Samples were placed immediately in an insulated storage container cooled with chemical ice. The temperature inside the storage container was maintained at or below 4° Celsius (39.2° Fahrenheit) and monitored with a thermometer to ensure that the temperature remained constant. The storage container also included a laboratory-prepared travel blank for quality ' control purposes and as an indicator of cross contamination. The travel blank was placed with the sample containers and analyzed if the field samples indicated detectable levels of fuel constituents. A chain of custody record accompanied the samples. Chain of custody records I included: sample location, depth, date, time, job number, field identification number, I temperature of sample container,analysis required and personnel collecting samples. ! a Water samples were delivered to a State certified hazardous waste laboratory within t * 1 approximately 4 days of collection. The temperature was maintained at 4° Celsius (39.2° Fahrenheit) in the insulated storage container prior to delivery to the laboratory. Once the samples were delivered to the laboratory, the chain of custody was signed by the laboratory 1 indicating that the possession of the samples had changed. The water samples were analyzed within the required 7-day period following collection. 1 I Well purging equipment was pre-cleaned by steam prior to each purging interval. Decontamination of sampling bailers is achieved by using a different dedicated, disposable I bailer for each sample. i i . r � I f I