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Title: Sampling and Analysis Plan for Environmental Control Number: Revision Date: Page 11 of 30 <br /> Groundwater Monitoring I PUE.EN.D.026.04 2/19/2020 <br /> • Contact information for laboratory invoice receipt (GCC Rio Grande) <br /> • Samplers printed name, signature, site information (state,zip code,time zone) <br /> • Designation of analytical suite designation,typically assigned as quote number <br /> • Chronological listing of sample ID, date/time of collection, matrix (groundwater), <br /> number of containers, analysis requested (analytical suite—"GW-Compliance") <br /> • Remarks as necessary <br /> • Relinquished by signature and date/time <br /> No scratch-outs are permitted on the chain of custody form. If a minor correction is required, <br /> such correction shall be made in ink by a single line through the error and corrected <br /> information beside. Initials shall be placed beside the correction. If the error is deemed <br /> significant by the sampler and could cause any future question as to the validity of the <br /> sample(s), the original chain of custody shall be destroyed and replaced with a new clean, <br /> accurate version. The carbon copy shall be retained by the sampler for records. If a carbon <br /> copy is not available, a photocopy of the chain of custody shall be made and filed in the <br /> sampler's records prior to packaging. The chain of custody document(s)will be placed in a <br /> Ziploc-type plastic bag and enclosed in the sample cooler or shipping container.The sample <br /> cooler will be custody-sealed as described below. <br /> Custody Seals <br /> Custody seals are used to assure the integrity of samples from the time the samples are collected <br /> and logged into the chain of custody system until the samples are received by analytical <br /> laboratory personnel. Samples will be shipped to the laboratory in coolers or other appropriate <br /> shipping containers. The cooler or shipping container must be custody-sealed in a manner <br /> which requires the destruction of the seal at the time of opening whenever a third-party delivery <br /> service is used. Such coolers or shipping containers will also be taped shut, with a layer of <br /> clear packaging tape placed over the custody seal, signed and dated using an indelible pen,to <br /> minimize the likelihood of accidental destruction during shipping and handling. <br /> 3.7 Field Quality Assurance/Quality Control(QA/QC) Samples <br /> Field duplicate samples and equipment rinse blanks will be collected during sampling events <br /> as described below.Field duplicates are useful in documenting combined field and laboratory <br /> precision. Field equipment rinsate blanks serve to evaluate the effectiveness of field <br /> decontamination procedures and should be collected as the final sample of the sampling event. <br /> Duplicate Samples <br /> One field duplicate sample will be collected per sampling event. Field duplicate samples are <br /> collected at the same location and time, placed in two different bottle sets, and labeled <br /> appropriately for separate analysis at the laboratory. Corresponding duplicate sample pair <br /> bottles are filled in alternating quarter-bottle increments to maximize sample homogeneity. <br /> Duplicate QC samples will be identified in a manner so as to not represent the sample site <br /> location. Designation of the sampling location where the duplicate sample is taken will be <br /> recorded in a field notebook for reference when reviewing sample results. Although the <br /> laboratory may know the sample is a duplicate, it will not know what sample has been <br /> duplicated. <br /> Equipment Rinsate Blanks <br />