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DTSTAMP:20240516T165719Z
LOCATION:288-290
DTSTART;TZID=America/Chicago:20240515T153000
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UID:IOSC_IOSC 2024_sess145_PAPER230@linklings.com
SUMMARY:A Proposed Approach to Measure Oil Removal Efficiency by Surface W
 ashing Agents in the Laboratory
DESCRIPTION:Paper\n\nRobert Grosser (Pegasus Technical Services, Inc.); De
 vi Sundaravadivelu and Raghu Venkatapathy (Pegasus Technical Services, Inc
 ); and Robyn Conmy (US EPA)\n\nOver 50 surface washing agents (SWAs) are l
 isted on the National Contingency Product Plan Schedule (NCPPS) with no cu
 rrent protocol to measure their effectiveness in removing weathered oil fr
 om shorelines. The US EPA is developing a testing protocol to determine th
 e influence of different parameters on SWA performance, which involves art
 ificially weathering Alaskan North Slope oil on stainless-steel discs and 
 adding SWA products to lift the oil from the substrate. Gravimetric analys
 is is used to determine the amount of oil removed by the SWA and remaining
  on the substrate. \n\nIn this study, 20 SWAs listed on the NCPPS were eva
 luated and showed widely varying effectiveness. The repeatability (Sr) and
  reproducibility (SR) of the protocol itself was evaluated with five SWA p
 roducts and a no product added control on three separate days. Efficient p
 roducts showed higher protocol variability (SR of 9.2-15.8% ), while ineff
 icient products and controls showed lower variability (SR of 2.2-4.4%) acr
 oss the three test days. The h-statistic, which describes the deviation of
  each trial from the overall mean for any given product, was used to confi
 rm statistical similarity of the three trials. Based on these results, the
  protocol was found to be repeatable and reproducible for the products inv
 estigated and conditions used. Further investigations of protocol paramete
 rs, such as mix time, turbulence, contact time, salinity, SWA to oil ratio
 , and temperature, will be conducted to further differentiate SWA product 
 performance. A standardized testing method could serve as an initial scree
 ning tool for SWAs and determine their appropriateness for oil spill remed
 iation.\n\nDisclaimer: The views expressed in this article are those of th
 e authors and do not necessarily reflect the opinions or policies of the U
 .S. EPA. This publication does not constitute an endorsement of any commer
 cial product.\n\nTag: Restoration\n\nSession Chair: Christopher Tracy (Her
 itage Environmental Services)
URL:https://iosc2024.conference-program.com/presentation/?id=PAPER230&sess
 =sess145
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