· The Department encourages the use of a PID at petroleum surface spill cleanups to assist in documenting cleanup.
· While a PID is sensitive to petroleum products such as gasoline and diesel fuel, field screening with a PID is generally not effective for low volatility oils such as lubricating oil, hydraulic oil, and mineral oil.
· Contact the manufacturer if you are unsure your PID can adequately detect the spilled product(s).
· Using a PID is not a substitute for laboratory analysis.
· NDEE does not have field screening values, other than zero, to determine “clean” vs “contaminated.”
· The primary purpose of field screening with a PID as it relates to this guidance is to demonstrate qualitative changes in contaminant levels.
This guidance taken, in part, from NDEE Risk-Based Corrective Action (RBCA) at Petroleum Release Sites: Tier 1/Tier 2 Assessments & Reports, 18.104.22.168-Field Screening:
· Place the soil sample in a clean, wide-mouth glass jar with a screw-on lid/ring,
· Fill the jar one-half full with the soil sample,
· Cover the mouth of the jar immediately with aluminum foil and secure the lid/ring,
· Place the jar in an environment above 60 degrees F for 30 minutes,
· Measure the contaminant level by puncturing the foil with the instrument probe,
· Record the highest level that the instrument registers,
· Field screening results are to be reported in parts per million (ppm) or parts per billion (ppb) relative to the calibration gas used to calibrate the instrument: often isobutylene.
Be sure the PID is charged and calibrated in accordance with the manufacturer’s specifications prior to sample analysis
Reporting Field Screening Results