Validation and Verification Methods. The following procedures will be used to determine if data meets the measurement and data quality objectives and criteria specified in Section 4. If data QA/QC procedures do not meet the specified criteria, the Quality Assurance Officer will review all field and laboratory records to determine the cause. If equipment failures are limiting the usability of the data, calibration and maintenance procedures will be reviewed and changed as needed. If sampling or analytical procedures are the source of failures, methods will be reviewed to resolve the errors. Any changes or modifications to quality control procedures will be approved by the Project Manager prior to inclusion in the QAPP. Review of Sample Handling Proper sample handling techniques are required to ensure sample integrity. During data review, the sample handling procedures identified below are evaluated to determine potential effects on data quality. Review of field sample collection and preservation procedures to determine whether they were completed in accordance with the requirements specified by the analytical methods. Review of chain-of-custody documentation to ensure control and custody of the samples was maintained. Review of sample holding times between sample collection, extraction, and analysis (see Table 6.2-1 in Section 6). Review of sample conditions upon receipt at the contract laboratory. Review of Quality Assurance/Quality Control (QA/QC) Samples. Specific procedures for review of QA/QC samples are included in the sections below. Laboratory Blank Samples Laboratory blank samples (method and instrument blanks) are laboratory-prepared, analyte-free samples used to detect the introduction of contamination or other artifacts into the laboratory sample handling and analytical process. These blanks play an especially important role in sampling programs involving trace-level analyses or analytes that are common solvents found in a laboratory. None of the analytes of concern for this project are common laboratory contaminants. If a contaminant is discovered in the analytical sample at less than five times the concentration it is found in the laboratory blank, it will be considered a laboratory contaminant. Otherwise, it will be reported as an environmental contaminant. Laboratory Control Samples Laboratory control samples are used to assess analytical performance under a given set of standard conditions. Synthetic samples, containing some or all of the analytes of interest at know...
Validation and Verification Methods. The Brownfields feasibility decision by the City is for use in evaluating whether response actions have removed asbestos-containing materials such that planned redevelopment activities may be completed. The data will be compared to the previously referenced state and federal clearance criteria for asbestos cleanup. The validation procedures of the Brownfields Project will be general and will focus on determining the proper collection, preservation and delivery of proper amounts of material under proper conditions to the laboratory for measurement and use in the final decision. The Field Team Leader will be responsible for the validation of real time data generated during clearance sampling which will be conducted in order to decide if data generated is of sufficient quality to determine whether cleanup activities conducted at the site have met the project requirements for future use of the site. Once it is determined that cleanup activities have met the project requirements and site cleanup activities have concluded, a final cleanup report will be prepared. An authorized QA Manager identified in Section A-4 will conduct a review of the final cleanup report. The review will consist of a comparison of a draft Response Action Completion Report and supporting field documents relative to compliance to the quality process and QAPP. The review will specifically address the following: ■ A7: Quality Objectives and Criteria for Measurement Data. ■ B1: Sampling Process Design. ■ B2: Sampling Methods. ■ B3: Sample Handling and Custody Requirements. ■ B5: Quality Control Requirements. The QA Manager will summarize deficiencies in writing to the Project Manager for resolution and evaluation of effect on the project decision(s). The Project Manager will rely on standard methods conformance and the laboratory data packages to support valid analytical data.
