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Site Investigation Work Plan Data Acquisition Carousel Cleaners, Sacramento, California and QA/QC Sample Shipment Paperwork Specific review considerations will be made for sample shipment paperwork. Before analytical samples are shipped from the field to the laboratory,the completed chain-of-custody paperwork will undergo thorough QC checks.First,a check will be performed by field personnel after all chain-of-custody forms and labels have been completed. Completion will include completing all necessary fields, except the chain-of-custody time relinquished field and having the sampler sign and date the form after completion of the review. The reviewer will ensure that the following is completed: • All forms and sample labels will be completed using a blue or black ballpoint pen. If an error is made on any form,the error will be struck with a single line,the correct value will be written as close to the old value as possible, and the correction will be initialed and dated. The incorrect value will not be written over or obliterated in any way. • If any sample shipment or paperwork errors occur,the errors will be corrected, signed, and dated. In addition to the above reviews,the designated reviewer also will evaluate the following: • adherence to the project schedule, • correct use of sample numbers, • correct types and numbers of sample bottles, • specification of preservation where necessary, • dates,times, and initials of corrections, and • correct chain-of-custody transfers between field personnel. Error Detection and Correction If any document completion errors are found during the review of project documents by the PM or a designee, a correction process will be undertaken by the individual who discovered the error. If an error is discovered,the incorrect form will be sent to the individual best suited to correct the error.After the form has been corrected, it will, in effect,become the final version of the document, suitable for report use. 5.8.2 Data Validation Data validation will be performed on every work order, method, and matrix. This confirmation process will include review of the analytical results and associated laboratory internal QC data and field QC data reported by the analytical laboratory. All generated data will be assessed for PARCC parameters.Any data that do not meet the project limits will be flagged and/or rejected. Any rejected data will go against the project completeness objective.At a minimum,the following items will be reviewed: • holding times, • accuracy(LCS, calibration, and surrogates), • precision(duplicates), • sample integrity, • interferences, and • blank contamination. 5-8