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material of construction, method of closure and filling requirements are specific to the intended analysis Chemicals needed to preserve the sample material are commonly placed inside the sample containers by the laboratory or glassware vendor prior to delivery of the bottle to our personnel The laboratory sets the number of replicate containers ' TRIP BLANKS A Trip Blank is carried to each site and is kept inside the cooler for the duration of the sampling event It is turned over to the laboratory for analysis with the samples from that site ' SAMPLE STORAGE All sample containers are promptly placed in food grade ice chests for storage in the field and transport (direct or via our facility) to the analytical laboratory that will perform the intended analytical ' procedures These ice chests contain quantities of restaurant grade ice as a refrigerant material The samples are maintained in either an ice chest or a refrigerator until relinquished into the custody of the laboratory or laboratory courier ' DOCUMENTATION CONVENTIONS ' Each and every sample container has a label affixed to it In most cases these labels are generated by our office personnel and are partially preprinted Labels can also be hand written by our field personnel The site is identified with the station number and site address, as is the particular groundwater well from ' which the sample is drawn (e g MW-1, MW-2, S-1 etc) The time at which the sample was collected and the initials of the person collecting the sample are handwritten onto the label Cham-of-custody records are created using client specific preprinted forms following USEPA specifications Bill of Lading records are contemporaneous records created in the field at the site where the non-hazardous purgewater is generated Field Technicians use preprinted Bill of Lading forms ' DECONTAMINATION All equipment is brought to the site in clean and serviceable condition and is cleaned after use in each ' well and before subsequent use in any other well Equipment is decontaminated before leaving the site The primary decontamination device is a commercial steam cleaner The steam cleaner is de-tuned to function as a hot pressure washer which is then operated with high quality delonized water which is produced at our facility and stored onboard our sampling vehicle Cleaning is facilitated by the use of proprietary fixtures and devices included in the patented workstation (U S Patent 5,535,775) that is incorporated in each sampling vehicle The steam cleaner is used to decon reels,pumps and bailers Any sensitive equipment or parts (i a Dissolved Oxygen sensor membrane, sounder etc ) that cannot be ' washed using the hot high pressure water, will be sprayed with a non-phosphate soap and deionized water solution and rinsed with deionized water EXAMPLE The sounder is cleaned between wells using the non-phosphate soap and deionized water solution followed by deionized water rinses The sounder is then washed with the steam cleaner between sites or as necessitated by use in a particularly contaminated well LrP 005 865