We’ll be referring to the table we have available for download for the screening levels for assessment. For this state, assessment of soil contamination proceeds in a systematic manner (see the Decision Tree document). The sample’s concentration is compared to background levels — either uncontaminated soil from or near the site or state background levels. […]
This is a follow-up post to The Numbers where we provided laboratory analysis results for a sample of pit waste at a natural gas well site. Risk assessment is a huge topic so we’ll be splitting the post into two parts. In this part we’ll discuss some features of the site that have to be […]
At a drilling site pits are used to store water, contain drilling fluids and cuttings or to hold other liquid substances such as brine or oil. Sites we’ve examined have all had at least one pit, that for drilling fluids and cuttings. These pits may also have held used fracture fluids (flowback). The only sites […]