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A4OM • Once the samples are collected and COC is completed, it is the sampler's responsibility to submit the samples to the courier or the lab. The signature in the `relinquished by' field must be the same person that is physically submitting the samples to the lab. o If samples are handed over to another person in the office, the sampler must relinquish the samples to that person by signing them over. o If samples are placed in a refrigerator for later pick up, the sampler must `relinquish' the samples to 'AECOM secure fridge'. • Whomever receives the samples from the person relinquishing the samples must sign the 'received by' field of the COC. • Scan and save all documentation. 2.2 QUALITY SAMPLES During routine sampling events the following quality samples may be required: • 1 trip blank per cooler with samples to be analyzed for volatile organic analysis (VOA) per day. Note, the term VOA vials refer to the 40-ml containers used for aqueous samples. • sampling of volatile compounds. o Two VOA vials filled with deionized (DI) water only analyzed for VOCs. • 1 duplicate sample for every 10 samples taken per event. o Duplicate sample is taken at a predetermined location and the bottle set is identical to the original sample set taken and analyzed for the same constituents. • 1 field blank for every 20 samples taken, or one per day if less than 20 samples are collected that day. o Three VOA vials filled with DI water only analyzed for VOCs. • 1 MS/MSD (volume varies) for every 20 samples taken per event. o No longer to be submitted as a separate sample but as additional volume to a predetermined primary sample. o Must be clearly marked on COC, "PERFORM MS/MSD ON XXX" • 1 equipment blank per day when using non-dedicated equipment. o Equipment blank bottle set is identical to the analyses taken for the primary sample where the non-dedicated equipment was used. Page 2 of 3