A02. PWS Attach 4 - Limit of Quantitation (LOQ).pdf
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- Trace Metal Sample Analysis
- Solicitation number
- HT942726RE010
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This is an appendix establishing Limit of Quantitation (LOQ) requirements for metal analysis across three sample matrices: water, soil/sediment, and tissue. The document specifies LOQ thresholds for 24 metals and two arsenic species that contractors must achieve during analytical testing and reporting.
The LOQ requirements vary by matrix type and analyte. Water samples require LOQ values ranging from 0.001 µg/L for mercury and arsenic species to 50 µg/L for calcium and magnesium. Soil/sediment samples (dry weight) specify LOQ values from 0.1 mg/kg for cadmium to 5 mg/kg for aluminum, with some metals marked as not applicable (NA). Tissue samples (wet weight) require LOQ values from 0.0004 mg/kg for mercury to 1 mg/kg for aluminum and zinc. The document mandates that CAS numbers and compound names must be reported in electronic data deliverables exactly as written in the Performance Work Statement. Critically, LOQ values must not be less than the lowest calibration standard, and reporting of estimated results flagged with "J" qualifiers is required for all verified values below the LOQ threshold.
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Other files
| File | Type | Posted |
|---|---|---|
| A02 PWS FINAL v2 COR.docx | DOCX document | |
| Attachment 6-Pricing Sheet v2.xlsx | XLSX spreadsheet | |
| Solicitation - HT942726RE010-0001.docx | DOCX document | |
| A02. PWS Attach 1 - Final Analytical Report & EDD Requirements v2.docx | DOCX document | |
| A02. PWS Attach 4 - Limit of Quantitation (LOQ) v2.docx | DOCX document | |
| A02. PWS Attach 3 - Analytical Methods v2.docx | DOCX document | |
| A02. PWS Attach 3 - Analytical Methods.pdf | ||
| A02. PWS Attach 1 - Final Analytical Report & EDD Requirements.pdf | ||
| A02. PWS Attach 2 - EDD Specifications.pdf | ||
| Attachment 6-Pricing Sheet.xlsx | XLSX spreadsheet | |
| Solicitation - HT942726RE010_final.docx | DOCX document |
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Text version
Attachment 4 – Limit of Quantitation (LOQ)
Required Water Required (dry wt.)
Soil/Sediment Required (wet wt.)
Tissue
CAS* Metal* LOQ (ug/L)**
LOQ
(mg/kg)**
LOQ
(mg/kg)** 7429-90-5 Aluminum 5 5 1 7440-36-0 Antimony 0.05 0.2 0.02 7440-38-2 Arsenic 0.15 0.4 0.04 7440-39-3 Barium 0.1 1 0.2 7440-41-7 Beryllium 0.15 1 0.1 7440-43-9 Cadmium 0.05 0.1 0.02 7440-70-2 Calcium 50 NA NA 7440-47-3 Chromium 0.120 1 0.18 7440-48-4 Cobalt 0.1 1 0.2 7440-50-8 Copper 0.2 0.8 0.2 7439-89-6 Iron 1 NA NA 7439-92-1 Lead 0.05 0.2 0.04 7439-95-4 Magnesium 20 NA NA 7439-96-5 Manganese 0.1 1 0.04 7439-97-6 Mercury 0.001 0.15 0.0004 7439-98-7 Molybdenum 0.1 1 0.03 7440-02-0 Nickel 0.2 1 0.2 7782-49-2 Selenium 0.1 1 0.15 7440-22-4 Silver 0.05 0.5 0.1 7440-28-0 Thallium 0.04 0.5 0.15 7440-62-2 Vanadium 0.15 1 0.2 7440-66-6 Zinc 1 2.2 1
7778-43-0 Arsenic V (pentavalent) 0.001 mg/L NA NA
7778-43-0 Arsenic III (trivalent) (7778-43-0) 0.001 mg/L N/A N/A
* CAS numbers (= analyte codes) and compound names must be provided in the electronic data deliverables (EDD) exactly as written in the PWS ** = not less than the lowest calibration standard. Reporting of estimated (J flagged) results are required for verified values weight abbreviated as wt.
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