3 ms·
On June 27, 2006, a monitoring well, which most people (myself included) would probably never notice among the carefully manicured flowers and shrubs, registere
by OGinparadise 14y ago
On June 27, 2006, a monitoring well, which most people (myself included) would probably never notice among the carefully manicured flowers and shrubs, registered 85,000 µg/L of TCE, the same toxic industrial de-greaser that newspapers reported about in Google's buildings a few weeks ago. For the sake of comparison, the federally-mandated limit for one liter of groundwater in micrograms is pretty far from 85,000. It's 5.
The silicon part of "Silicon Valley. "
- rayiner 14y agoThat's a shit-ton of TCE too. 85,000 micrograms per L is 85 milligrams per L. In comparison, there is about 100 milligrams of caffeine in a liter of coke and about 400 milligrams of caffeine in a liter of coffee. So we're talking about containment levels at about the same order of magnitude as beverages that intentionally contain an active specific ingredient.
- tptacek 14y agoThat is a shitload of TCE. I can't find any Superfund site with a similar concentration.
- rayiner 14y agoI found 29,000 uG/L at this petrochemical distribution facility: epa.gov/tio/download/remed/rse/mattiace.pdf (page 13 of the text, section 4.3.2).
- philsnow 14y agoClick the red triangle near 101 / 237 interchange in Sunnyvale on the google maps link from the footer of the article, you'll get this page: http://geotracker.waterboards.ca.gov/gama/gamamap/public/cluster_wells.asp?parlabel=TCE&sitelat=null&sitelon=null&mytype=detections&zl=15&dataset=EDF&rx=-122.05&ry=37.4&timeframe=ALL&gis_layer=&gis_name= http://geotracker.waterboards.ca.gov/gama/gamamap/public/clu... It's sorted in descending order by max level of TCE detected at each well, ever. The top three wells are 140k (ca 2006), 110k (ca 2009), and 100k (ca 2007) micrograms / liter. There's a similar site by the Sunnyvale Fry's on Arques, but that one's peak detection was 74.7k ug/L.