1.  Your order will be shipped with carbonless Chain of Custody form for recording all required information. If more are needed, print enough Chain of Custody forms so that the deployment and retrieval data for each Sentinel™ Sediment Passive Sampler can be recorded on a row corresponding to the sample.  One copy of the form is sufficient for 20 Sentinel™ Sediment Passive Samplers. 

2.  If the deployment plan includes a field blank, leave the field blank in the tube in which it was shipped, clearly mark the tube “Field Blank.”  Do not deploy the field blank. 

3.  Make provisions to save the 50 mL tapered centrifuge tube(s) and the resealable plastic packaging for reuse in shipment to the lab.  (No need to match the Sentinel™ Sediment Passive Sampler to the 50 mL tube or other packaging materials in which it was shipped.) 

4.  Remove the Sentinel™ Sediment Passive Sampler from the 50 mL tapered centrifuge tube.  It is shipped with a metal tag attached to the flat end that will can serve as sample identification, or to help with retrieval. 

5.  Insert the Sentinel™ Sediment Passive Sampler into the Sediment to be monitored by whatever means required. The Sentinel™ Sediment Passive Sampler is designed with a stainless steel body and washers to provide sufficient strength for insertion.

6. At deployment, record on the Chain of Custody Form: 

• The sample ID number (the serial number on the metal tag or other system appropriate to your deployment);  
• The date deployed; 
• The time deployed (to the nearest 15 minutes); and  
• The water speed at the sample site (use 0-2 cm/min for sediment). 

7. For most applications, a deployment of approximately 10-14 days duration will be sufficient to achieve a limit of detection of ~1-2 ng/L (ppt) for all PFAS analytes addressed in EPA Method 1633. 

8. Plan to bring ~50 mL of DI water to rinse the Sentinel™ Sediment Passive Sampler at retrieval.

9. At retrieval, record on the row in the Chain of Custody Form corresponding to the Sentinel™ Passive Sampler: 

• The sample ID number (the serial number on the metal tag or other system appropriate to your deployment);  
• The date retrieved; 
• The time retrieved (to the nearest 15 minutes); and  
• The water temperature in °C. 

(The water temperature could have been recorded at deployment.)

10. Briefly rinse the Sentinel™ Sediment Passive Sampler with ~50 mL of DI water to remove most dirt and debris before shipment.

11. Replace the Sentinel™ Sediment Passive Sampler in a 50 mL tapered centrifuge tube and tighten the cap.  Place the tube with Sentinel™ Sediment Passive Sampler in the resealable plastic bag or other return packaging. 

12.  Place all Sentinel™ Sediment Passive Samplers in refrigerated packaging and ship overnight (or at most two-day delivery) to laboratory for analysis.