Yesterday the EPA released their recommendations for what to do about the toxic muck in the San Jacinto Waste Pits, after more than a decade of local and federal agencies poking and fishing around in the area (on either side of the I-10 crossing of the river). So far the Superfund site has been temporarily dealt with by the 2011 placement of a pretty-much-just-a-tarp-with-rocks-over-it armored cap, which the EPA says has already been repaired at least 7 times; the document released yesterday notes, however, that disturbances at the site caused by weather and previous nearby sand mining operations “could cause a catastrophic release of the highly toxic waste materials from the impoundments, if they remain in place.”

The EPA wants to remove about 202,000 cubic yards of contaminated material (roughly enough to fill the floor of the Astrodome with a 13-foot-deep layer) but says it’ll have to be done carefully so as not to accidentally stir up the waste into the surrounding river while trying to get it out; the removal would also probably take place in stages to avoid potentially exposing too much of the waste at a time to storms or flooding. Here’s the EPA’s map of the 2 sites where the paper sludge was originally dumped in the 1960s — the (capped) northern area is outlined in blue and labeled Cap Site, while the southern site (outlined in yellow and labled Southern Impoundment) is covered in part by the Glendale Boatworks building, next to Southwest Shipyard:

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