Water Sample Collection
- Collect water from the kitchen sink (unfiltered tap).
- Ensure no water has been used for 8 hours.
- Avoid touching the inside of the bottle or cap.
- Fill the bottle slowly, stopping before it overflows.
- Seal tightly after collection.
- Record date, time, and details on the chain of custody document.
- Next Steps:
- Place the sample in a Ziploc bag to prevent leaks.
Dust Sampling Procedure
Handwashing
- Wash hands thoroughly with soap and water.
- Dry with a clean paper towel.
Collecting Field Blank:
- Use the "blank" tube.
- Open the ghost wipe package without contaminating the wipe.
- Fold the wipe four times and place it in the tube.
Floor Dust Sample Collection:
- Lay down the cardboard template without touching the center.
- Open the ghost wipe and place it inside the template.
- Press firmly across the surface, moving diagonally and ensuring even pressure.
- Avoid going beyond the template.
- Fold the wipe with the dust inside four times.
Windowsill Dust Sample:
- Open the ghost wipe and wipe the windowsill’s top surface.
- Capture the dust by folding the wipe with the dusty side inwards.
- Measure the length and width of the wiped area using a tape measure.
Documenting and Sealing:
- Record the sample collection date, time, and measurements on the chain of custody form.
- Place all samples (floor, windowsill, and field blank) in Ziploc bags and seal tightly to prevent contamination.
- Double-check that all required details (e.g., length and width of windowsill) are noted.
Final Steps:
- Wash hands again after collecting the samples.
- Complete the chain of custody form with the necessary information and store the samples for transport.
Soil Sampling Procedure
Choosing Locations:
- Select three different locations around the house, within 3 feet of the walls, ideally on different sides.
- Look for areas with bare soil or minimal covering (e.g., leaves or grass that can be pushed aside).
Collecting Soil Samples:
- Wash hands before starting.
- Dig down about 2 inches into the soil and loosen the soil.
- Collect one scoop from each of the three locations, mixing soil layers.
Documenting and Sealing:
- After collecting the samples, place them in a labeled jar.
- Make a quick sketch of the house to mark sample locations and record date and time on the chain of custody form.
- Seal the samples in a bag and prepare for shipping.