Case study - EPH in soil with diesel and home heating oils

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Courtesy of Sitelab Corporation

Sitelab’s UVF-3100 analyzer is a popular tool when excavating soils contaminated by fuel oils from underground storage tanks (USTs). These studies show the accuracy testing samples for Extractable Petroleum Hydrocarbons, EPH C11- C22 aromatic hydrocarbons.

Samples are extracted in solvent using test kits and measured on the UVF analyzer’s EPH optics, calibrated to Sitelab’s PAH Calibration Kit. Results correlate well to the Massachusetts DEP’s EPH method using GC-FID.

Regulators in Massachusetts, North Carolina and a growing number of states, require VPH and EPH laboratory methods, where aliphatic and aromatics are reported separately.

Site 1: Residential Home Heating Oil Spill

A contractor split samples with Sitelab and a certified laboratory testing soils contaminated with heating oil after removing a homeowner’s underground fuel tank. Field results were used to guide excavation to below 200 ppm.

Site 2: Industrial Site with No. 2 Fuel Oil

Sitelab’s mobile laboratory was used on-site to excavate contaminated soils after removing two 10,000 gallon fuel tanks. The property was being redeveloped into a shopping center. The site’s action limit was 800 ppm.

Site 3: Trucking Facility with Diesel Fuel

After removing a diesel tank once used for refueling trucks, a contractor excavated all the impacted soil and then used a vacuum truck to remove the contamination above the bedrock until Sitelab’s EPH concentrations were clean and site closure samples were collected.

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