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PST – Petroleum Storage Tank. QA/QC - quality assurance/quality control ... Surface Water PCLE Zone Map* Figure 6B - Photographs* ... (≥ 25% LEL) NAPL zone expanding NAPL zone is observed to be expanding using time-series data Mobile NAPL in vadose zone NAPL zone is observably mobile, or is theoretically mobile based on COC concentrations ... ................
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