Reporting Limits. Provided below is a list of maximum acceptable reporting limits and units for various constituents in aqueous, sediment, and tissue matrices. Contractor may not deviate from maximum acceptable reporting limits without approval of County. Contractor must provide laboratory and electronic data report (EDR) results in the units specified in the following table. Contractor must provide reasonable explanation for alternate proposed reporting limits. Aqueous Samples Reporting Limit and Units Na, Mg, K, Ca 1.0 mg/L XX0, Xx, XXX0, XX0 1.0 mg/L SO4 in Rainwater 0.5 mg/L F 0.1 mg/L B 0.1 mg/L Nitrite + Nitrate as NO3 0.4 mg/L NH3 as N 0.1 mg/L TKN 0.2 mg/L Total Phosphorus as PO4 0.06 mg/L Orthophosphate as P 0.02 mg/L SiO2 0.5 mg/L Total Non-filterable Residue (Total Suspended Solids (TSS)) 5.0 mg/L Volatile Non-filterable Residue (Volatile Suspended Solids (VSS)) 5.0 mg/L Total Filterable Residue (Total Dissolved Solids (TDS)) 5.0 mg/L Xx, Xx, Xx, Xx, Xx, Xx, Xx in freshwater 0.5 ug/L As, Se, in freshwater 0.4 ug/L Tl,in freshwater 0.2 ug/L Hg in freshwater 0.01 ug/L Zn in freshwater 2 ug/L Fe, Mn in freshwater 5 ug/L Ag, As, Be, Cd, Cr, Cu, Fe, Ni, Pb, Se, Sb, Tl, Zn, in seawater 0.05 ug/L Hg in seawater 0.5 ng/L Oil & Grease 5 mg/L MBAS 0.1 mg/L Organochlorine Pesticides (except Toxaphene) 2 ng/L Toxaphene 20 ng/L PCB Congeners 2 ng/L PCB Arochlors 20 ng/L Organophosphorus Pesticides 5 ng/L Carbaryl in freshwater 2 ug/L Pyrethroid Pesticides in freshwater 2 ng/L Fipronil Insecticides 5 ng/L Neonicitinoid Pesticides 4 - 4 ng/L Triclopyr 1.0 ug/L Glyphosate 5.0 ug/L Nonylphenol 100 ng/L Total Petroleum Hydrocarbons (TPH) 0.1 mg/L Volatile Organic Compounds (VOC) 5 ng/L Semi-Volatile Organic Compounds (SVOC) 5 ng/L Sediment and Tissue Samples (dry wt) Organochlorine Pesticides (except Toxaphene) 2 ug/kg Aqueous Samples Reporting Limit and Units Toxaphene 20 ug/kg Total Petroleum Hydrocarbons (TPHS) 5 mg/kg Volatile Organic Compounds (VOC) 2-100 ng/g Semi-Volatile Organic Compounds (SVOC) 2-100 ng/g Fipronil Insecticides 5 ng/g PCB Congeners 2 ug/kg PCBs (arochlors) 20 ug/kg Pyrethroid Pesticides 5 ug/kg Fipronil Insecticides 5 ug/kg PAHs 2 ug/kg Cadmium 0.05 mg/kg Copper 0.05 mg/kg Chromium (total) 0.05 mg/kg Lead 0.05 mg/kg Mercury 0.05 mg/kg Nickel 0.05 mg/kg Selenium 0.05 mg/kg Silver 0.05 mg/kg Zinc 0.05 mg/kg
Reporting Limits. The reporting limits are the lowest concentration that can be reliably achieved within specified limits of precision and accuracy during routine laboratory conditions. For many analytes, the reporting limit analyte concentration is selected by the laboratory as the lowest non-zero standard in the calibration curve. Sample reporting limits vary based on sample matrix and dilution of the samples during analysis. Reporting limits should be equal to or below the PQLs (Practical Quantitation Limits) provided in Table 7.0-1 for each method. Data Qualification Qualifiers will be applied to QC samples when acceptance criteria are not met and corrective action is not performed or is unsuccessful. These same qualifiers will be applied to the associated sample data, as defined in the following table.
Reporting Limits. ARI's reporting limits are based on method detection limit (MDL) studies and demonstrated analyte response. These limits consider sample weights or volumes, and extract or digest volumes as specified in ARI Standard Operating Procedures (SOP). Reporting limits are matrix dependent. The sample matrix may preclude achievement of published reporting limits. XXX's analysts will endeavor to analyze samples as concentrated as possible based on the matrix. It is at the discretion of ARI to define the point at which sample overload will damage the analytical system. QA Acceptance Criteria: ARI calculates and publishes acceptance limits for QA parameters including but not limited to LSC spike recovery, matrix spike recovery and replicate RPD. These limits are based on historic data, reviewed at least quarterly and updated as necessary. ARI’s published QA acceptance criteria may change between the time a quotation is prepared and when samples arrive at ARI’s facility.
