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December Z3, 1999 Puge C-9 <br />• C.4.2.3 Custody Seals <br />Custody seals are preprinted adhesive-backed seals with security slots designed to break if <br />the seals are disturbed. Sample shipping containers (coolers, cardboard boxes, etc.) are sealed with <br />custody seals in as many places as possible to ensure security. Seals are signed and dated before use <br />and strapping tape should be placed over the seals to ensure that seals are not broken accidentally <br />during shipping. Upon receipt at the laboratory, the sample custodian must check (and certify, by <br />completing the package receipt log) that the seals on coolers, boxes, and bottles are intact. <br />C.4.2.4 Clrain-of-Custody Form <br />The chain-of-custody (COC) record will be completed, placed in a plastic bag, and taped to <br />the inside lid of the sample cooler. Instructions for filling out the COC are givemin Section C.5.3. <br />C.4.2.5 Sample Shipment <br />Samples should be shipped every day during sampling. Samples will be shipped in iced <br />coolers with a completed chain-of-custody form taped to the inside of the cooler lid. Coolers will <br />be sent to the lab by standard overnight delivery orhand-carried io a Colorado-certiFed laboratory. <br />• The choice of laboratory could change during the course of monitoring program. <br />Samples will be shipped such that the holding times are not exceeded. <br />C.5 DOCUMENTATION <br />C.5.1 Field Sampling Data Sheet <br />A field sampling data sheet for groundwater samples should be completed at each sampling <br />location. The data sheet will be filled incompletely. If items on the sheet do not apply to a specific <br />location, the item will be labeled as not applicable (NA). The following information is included on <br />the data sheet: <br />Well number <br />Date and time of sampling <br />Person(s) performing sampling <br />Volume of water evacuated before sampling <br />Conductivity, temperature, and pH during evacuation <br />• ~ Time samples are obtained <br />Number of samples taken <br />Sample identification number <br />Agapito Associates, lne. <br /> <br />