ClPestdw
Chlorinated pesticides and PCBs– Drinking Water
Laboratory Fee Schedule
Procedure: EZZ0222A
Chlorinated pesticides and PCBs– Drinking Water
Synonym(s): |
Chlorinated pesticides and PCBs in Water |
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 water proof 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 |
Method |
EPA 508.1 |
Turn-around Time |
Samples must be extracted by the lab within 14 days of collection. |
Interferences/Limitations |
|
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. 2) If the chlorine residual is >5 mg/L, additional dechlorinating agent is required. For every mg/L of chlorine above the initial 5 mg/L add an additional 10 mg of Na2SO3. For example: a sample with 7 mg/L chlorine would require 70 mg of Na2SO3.
Contact the laboratory at (512) 776-7587 for currently supported analyte list. |