Chlorinated pesticides and PCBs – Drinking Water
Laboratory Fee Schedule
Procedure #: EZZ0222A
Synonym(s): | Chlorinated pesticides and PCBs in Water. |
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Requisition Form | G-22 |
Test Description | Chlorinated pesticides and polychlorinated biphenyls (PCBs) in drinking water, EPA method 508.1 |
Pre-Approval Needed | N/A |
Supplemental Information Required | N/A |
Supplemental Form(s) | N/A |
Performed on Specimens from (sources) | Environmental |
Sample/Specimen Type for Testing | Drinking Water |
Minimum Volume/Size Required | Narrow-mouth (or wide mouth) amber glass with Teflon (PTFE) cap liner; 1 quart (1 L) |
Storage/Preservation Prior to Shipping | • Add 50 mg of sodium sulfite (Na2SO3) to the empty container (dechlorinating agent) • Open the tap and allow the system to flush until the water temperature stabilizes, at least 5 minutes. Turn flow down to a smooth, pencil thin stream. • Remove cap from the bottle, tilt, and place under stream. • Fill half the container with sample water. Mix gently until sodium sulfite is completely dissolved. • Add 3 to 4 mL 6N hydrochloric acid (HCl) in order to achieve a pH of < 2. (HCl is used as a Preservative) • Finish filling the container (to shoulder) and seal. A small amount of head space is acceptable. • Mix for one minute • Store samples in the dark from time of collection until extraction • Store at 4°C. |
Transport Medium | N/A |
Specimen Labeling | • Label each bottle with a waterproof marker. • Pre-printing labels is acceptable. • Sample identification must match submission form. |
Shipping and Specimen Handling Requirements | • Ship according to Dangerous Goods Regulations, IATA, and/or CFR 49. • Ship on ice (4°C). • Store samples in the dark from time of collection until extraction |
Turn-around Time | Samples must be extracted by the lab within 14 days of collection. |
Interferences/Limitations | • Be careful not to add too much Na2SO3to the sample because this may cause interference in the analysis. • Sampling equipment must be free of plastic tubing, gaskets or other parts that may leach interfering analytes into the sample. • Matrix interferences may be caused by contaminants that are coextracted from the sample. The extent of matrix interferences may vary considerably from sample to sample. |
Common Causes for Rejection | Insufficient quantity, unacceptable specimen type or source, improper shipping conditions, expired media or collection container, discrepancies between specimen label and submission form, incomplete or missing submission form |
Additional Information |
1) Laboratory QC duplicates are required for samples. One in ten samples should be collected in triplicate. For the sample to be triplicated, add the words “+DUP”. The sample and duplicates will be submitted with only one analysis form. Contact the laboratory at (512) 776-7587 for currently supported analyte list. |