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Ryegrass Limited Purpose Landfill and BaleMl Closed Land%U, <br />Groundwater and Leachate Sampling and Analysis Plan <br />Icautly C.=ry S-04d Waste <br />Table G provides guidelines for minimum QA/QC samples for field sampling and laboratory analysis of <br />water samples, <br />2.6.1 Field <br />Field QA/QC includes proper documentation of field activities and sampling/handiing procedures, as <br />described in Section 3.5. <br />Field QA/QC samples will consist of the following. <br />■ One duplicate per sampling round <br />■ One trip blank (analysis for VOCs) per sampling round <br />2,6J.1 >Duplleates and Split SampleS <br />A minimum of one field duplicate will be analyzed per 20 samples or one per sampling event <br />(whichever is greater) to verify the precision of laboratory and/or sampling methodology. The field <br />duplicate will be collected at one selected groundwater location and will be tested for all parameters. <br />The duplicate sample will be collected using the same procedures as for the corresponding sample <br />and will be field filtered for dissolved metals using the same tubing and filter. <br />Duplicates are used to confirm analytical results from a given sample point. Dupiioate samples are <br />collected in the field using a matching set of laboratory -supplied bottles and sampling from the <br />selected well, as requested. Each duplicate should be sampled by alternating between the regular <br />and the duplicate sample bottles, proceeding in the designated sampling order (VOCs first, followed <br />by TPH, Inorganics and metals, see SOP in Appendix B). The well where the duplicate is collected <br />must be Identified an the field sampling data sheet. All duplicates shall be blind -labeled (see Section <br />3.5,2). Once a duplicate is collected, it is handled and submitted In the same manner as the rest of <br />the samples. Duplicate samples will be labelled as separate samples, and will be "bond"; i.e., the <br />laboratory will not know it is a duplicate (see Section 3.5.1). <br />Split samples are collected when a well Is sampled with a third party (e.g., Ecology). Split samples <br />should be collected using the same method as a duplicate, alternating between sample bottles, and <br />proceeding in the designated sampling order. The well at which a split sample is collected must be <br />identified on the field sampling data sheet. Also note the condition of the bottles or preservatives, <br />the sample collection method (if different from the standard), and the selected agency laboratory. <br />2.6.1.2 Trip Blanks <br />Trip blanks are used to detect contamination that may be introduced in bottle preparation, in transit <br />to or from the sampling Site, or in the field. Trip blanks are used to detect VOC contamination. There <br />will be one trip blank In each cooler used to ship VOC samples to the laboratory. The trip blank will <br />consist of a purged -free deionized/distilled water blank supplied by the analytical laboratory. It will <br />be transported to and from the field, then returned to the laboratory unopened and unaltered for <br />analysis. The term "purged -free" water refers to deionized/distilled water that has been boiled and <br />capped In the laboratory. <br />ApN1 2024 1 553-1753-010 2-B <br />Revised May 2024 <br />