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laboratory, carried to the field by samplers along with the actual sample bottles, transported to the laboratory, and analyzed exactly like all other samples, Any contaminants found in the trip blanks could be attributed to interaction between the sample and the container, or a handling procedure that alters the integrity of the sample matrix. A sampling equipment rinsate will be collected in the following manner. After decontamination has been performed on the sampling equipment, and prior to use, a distilled water rinsate will be collected from the appropriate sample collection system (e.g. bailers, filtering apparatus). Analysis of this type of sample for volatile organics verifies decontamination effectiveness. Sample handling Samples will be packaged and delivered to the laboratory in a way to best preserve the integrity of the samples. Sample containers will be placed on ice in insulated coolers and the coolers used for transport of the containers. Chain of Custody forms will be enclosed in each cooler. Transport of samples to the laboratory will be by hand delivery by MFG sampling personnel. Chain of Custody forms will be completed in the field at the time of sample collection. When custody changes, signatures of personnel regulating the sample exchange will be put on the form along with the date, time and company affiliation. A signed and completed copy of the Chain of Custody form will be included in the final report. Sample analysis Water samples will be analyzed in accordance with the guidelines of EPA SW-846 (Test Methods for Evaluating Solid Waste-Physical/Chemical Methods) third ed., Revised 12/87, EPA 600/4-79-020 (Methods for Chemical Analyses of Water and Wastes), Revised March 1983, and Standard Methods for the Examination of Water and Wastewater, 16th ed., 1985. Water samples will be analyzed in the laboratory Jor the following parameters: 1) General chemistry: calcium, magnesium, sodium, potassium, carbonate, bicarbonate, sulfate, fluoride, nitrate, phenolphthalein alkalinity (CaCO3), alkalinity (CaCO3), hardness (CaCO3), chloride, pH, specific conductance, and total dissolved solids (IDS); 2) Total organic carbon (TOC); 3) Trace metals: arsenic, barium, cadmium, chromium, copper, iron, lead; manganese, mercury, selenium, silver, and zinc; and 4) Volatile and semi-volatile organic compounds: Priority Pollutant List (40 CFR 122). A laboratory quality assurance/quality control (QA/QC) program will be employed to ensure 3