FIELD QUALITY CONTROL REQUIREMENTS. This information was provided in Section B5 of the Generic QAPP. Section B2 above provides container requirements, analytical methods, and preservative requirements specific to this Site. In addition, QA/QC acceptance criteria for matrix spikes, equipment blanks, trip blanks, and laboratory control samples, etc. are provided in Pace Analytical’s QAM provided in Appendix D.
FIELD QUALITY CONTROL REQUIREMENTS. Blanks for sampling procedures will be collected for applicable project analytes according to requirements in DEP SOP FQ 1000. Equipment blanks will be collected from the autosampler assembly used to collect composite samples according to the requirements in DEP SOP FS 2100. The following additional field-QC measures (per the DEP Agreement and/or as proposed by the Contractor) will be performed for this project: List or enter NA.
FIELD QUALITY CONTROL REQUIREMENTS. Field QC samples are submitted as separate samples to the laboratory and reported accordingly, on the data reports. Specific requirements are outlined below. The only field QC samples routinely used on this program are field duplicates. Field duplicates – A routine water quality monitoring field duplicate is defined as a second sample, from the same location, collected in immediate succession, using identical techniques. This applies to all cases of routine surface water collection procedures, including in-stream grab samples, bucket grab samples (e.g., from bridges), pumps, and other water sampling devices. It is recommended that field grab duplicate samples (10% annual basis) be collected when the total number of routine samples is greater than 10 samples per year. Duplicate samples are sealed handled, stored, shipped, and analyzed in the sample manner as the primary sample. Precision of duplicate results is calculated by the relative percent difference (RPD) as defined by 100 times the difference (range) of each duplicate set, divided by the average value (mean) of the set. For duplicate results, D1 and D2, the RPD is calculated from the following equation: RPD = (D1 − D2) ∗ 100 (D1 − D2)⁄2 Equation ES-1: Field Duplicate Relative Percent Difference Best professional judgment is used to determine the acceptability of field duplicate analyses.
