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Overview of Formosa Drainage Study

annika

This supplementary legal document describes recommendations for storm- and waste-water management improvements for the Formosa petrochemical plant in Calhoun County, Texas. The text is a fairly standard drainage assessment. The author describes non-trivial discharge of pollutants out of the plant’s outfalls, which drain into local waters, and the inability of the plant’s systems to prevent flooding from even small storms. For some context on this, it is pretty standard to design a stormwater system to be able to drain the 100-year storm (that is, the storm with a 1% or less chance of occurring in any given year). Formosa’s Texas plant demonstrated the inability to convey even the 2-year storm.

Formosa Drainage Study

annika

Emphases are mine:

Problem areas were identified based on the results from the outfall drainage studies provided by Formosa. Thus, all the results in the OPCC rely on those studies, uncertainities associated with those studies, and the assumptions made for those studies, some of which may or may not be appropriate as I pointed out in Supplement #2 [Page 4]” (3)

“The proposed improvements assume that the conveyance capacity of the problem areas is increased 100%, which would be able to handle twice as much flow that it currently does. The results from the Drainage Study are not conclusive as to what storm event Formosa’s system currently is capable of conveying. The report does mention that the system is not capable of conveying the 2-year storm, and “sometimes” not even the 1-year storm event. (3)

“A 45% contingency is applied to the OPCC due to the uncertainties associated with underground utilities, likelihood of existence of low road crossings and need to replace those, groundwater impacts, other unknowns, and additional costs associated with engineering, etc. 45% is reasonable and in line with industry practices in my experience, especially given the large amount of unknown information available.” (4) 

“My opinion from my July 9, 2018 report that “there have been and are still pellets and/or plastic materials discharges above trace amounts through Outfall 001” is further supported by the deposition testimony of Lisa Vitale, as representative for Freese & Nichols, Inc, that she and her colleagues have seen floating white pellets or small plastic pieces in Lavaca Bay and in the area near outfall 001 as part of her work on the receiving water monitoring program for Formosa’s TPDES permit...Ms. Vitale also testified that she told John Hyak of Formosa about these sightings as well as has sent him water samples with the pellets about five or six times, including at least one time prior to 2010. This, along with the June 2010 EPA Report I cited in my July Report, demonstrates to me that Formosa was aware of problems related to discharges of plastics from its facility since at least in 2010.” (6)

 

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Kathy.Thompson

This article explains that there is still desvestation from Hurrican Sandy.  Raw sweage seeped in the Passica River and the efforts to remove it still exist.  New Jersey's infrasture is very  vulnerable.  The DEP developed a 230 million system to build flood walls and hopefully this will help in case of future storm.  

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stephanie.niev…

The aftermaths of Sandy had created many vulnerabilites to the communities around the shores. There were about 840 million gallons of raw sewage scattered into the Passaic River; and since the sewerage system had struggled to get back to full operating hours and service, there were 4.4 billion gallons of partially treated sewage were released into New York Harbor. In addition, many infrastructure was severely damaged after the storm: houses, power substations, police headquarters, etc.

 

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stephanie.niev…

After the storms, many towns affected came up with ways to increase protection in infrastructure. Town officials working alongside exerpts have been working to upgrade their plans on making their communities more resilient to natural disasters. There have also many several funds and donations for the towns affected by Sandy; there have also been ways on how to help prevent flooding in such areas. In the article, it discusses how "the DEP has worked with local officials to design a proposed $230 million federally-funded system of flood walls along the Hudson River for Hoboken and parts of Weehawken and Jersey City."