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Sample Handling Sample containers were labeled immediately prior to sample collection Samples were kept cool with cold packs until received by the laboratory At the time of sampling, each sample was logged on an ARCO chain-of-custody record that accompanied the sample to the laboratory Samples that required overnight storage prior to shipping to the laboratory were kept cool (4°Celsius) in a refrigerator The refrigerator was kept in a warehouse which was locked when not occupied by an EMCON employee A sample/refrigerator log was kept to record the date and time that samples were placed into and removed from the refrigerator Samples were transferred from EMCON to an ARCO-approved laboratory by couner or taken directly to the laboratory by the environmental sampler Sample shipments from EMCON to laboratories performing the selected analyses routinely occurred within 24 hours of sample (,ollection Sample Documentation The following procedures were used during sampling and analysis to provide Chau}-of-custody control during sample handling from collection through storage Sample documentation included the use of the following • Water Sample Field Data Sheets to document sampling activities in the field • Labels to identify individual samples • Cham-of-custody record sheets for documenting possession and transfer of samples • Laboratory analysis request sheets for documenting analyses to be performed Field Logbook In the field, the sampler recorded the following information on the Water Sample Field Data Sheet (see Figure A-2) for each sample collected • Project number • Client's name • Location • Name of sampler • Date and time • Well accessibility and integrity • Pertinent well data (e g , casing diameter, • Calculated and actual purge volumes depth to water, well depth) • • Purging equtpment used • Sampling equipment used 0