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Ryegrass Limited Purpose Landfill and Baletill Closed Landfill <br />Groundwater and Leachate Sampling and Analysis Plan <br />Kitutas County Solid Waite <br />Sample numbering will follow the following format <br />138-0701= monitoring well MW-29D collected in July 2001 <br />BXX-0701= duplicate, where XX is a well number that doesn't exist on the Site (i.e., does not <br />indicate the sample is a duplicate, or which well a duplicate is from) <br />2.5.3 Chain -0 f-Custody Record <br />The objective of the chain -of -custody procedures is to allow the tracking of possession and handling <br />of Individual samples from the time of field collection through laboratory analysis. Once a sample is <br />collected, it becomes part of the chain -of -custody process. A sample is "in custody" when: (1) it is <br />directly in someone's possession, (2) it is within visual proximity of that person, (3) it is not directly in <br />that person's possession, but locked up and sealed (e.g., during transport), or (4) it is in a designated <br />secure sample storage area, Sampling staff will complete a Chain -of -Custody form, which will <br />accompany each batch of samples. The record will contain the following information: <br />• Project name and number <br />s Names of sampling team members <br />a Requested testing program <br />■ Required turnaround time <br />• Sample number <br />■ Date and time collected <br />• Sample type <br />R Matrix <br />■ Number of containers <br />s Special Instructions <br />■ Signatures of persons involved in the chain of custody <br />When sample custody is transferred to another individual, the samples must be relinquished by the <br />present custodian and received by the new custodian. This will be recorded at the bottom of the Chain - <br />of -Custody form where the persons involved will sign, date, and note the time of transfer. A Chain -of - <br />Custody form is provided in Appendix C. <br />Sampling team members will keep sample coolers in locked vehicles while not In active use or visual <br />range. If couriers are used to transport samples, Chain -of -Custody seals will be affixed to sample <br />coolers. <br />2.6 Quality Assurance/Quality Control <br />Samples will be collected and analyzed with sufficient quality assurance/quality control (QA/QC) to <br />ensure representative and reliable results. The overall QA objective for this investigation is to ensure <br />that all decisions based on laboratory and field data are technically sound, statistically valid, and <br />properly documented. Specific QA protocols will be executed and are described for all activities related <br />to the collection of samples, the analyses of these samples by the laboratory, and the handling of data <br />generated during the investigation. There are two parts to the QA/QC program for this project; field and <br />laboratory. <br />April 2024 1 553-1763.010 2-7 <br />Revised May 2024 <br />