When the filter on the one well was removed, tests showed 66 times the acceptable level of the soil fumigant, known as 1, 1 dichloropropane.
12.
Second, the introduction of the soil fumigants, D-D and EDB made available for the first time nematicides that could be used effectively and practically on a field scale.
13.
The contaminants triggered a reaction in the filter that formed methyl isothiocyanate, or MITC, a chemical that is the basis for a commercial pesticide available as a soil fumigant.
14.
Next most highly used were two soil fumigants, Telone and metam sodium, which spilled during a train wreck in 1991 and killed fish in miles of the Sacramento River.
15.
The use of soil fumigants, such as methyl bromide and metam-sodium, which are used in higher application rates than many other pesticides, has also been reduced, according to the report.
16.
The most likely alternatives to methyl bromide as a soil fumigant are chemicals called Telone and chloropicrin, but California and Florida have restrictions on both due to air and water quality concerns.
17.
Growers prepare the ground for the new strawberry bushes by injecting methyl bromide, a soil fumigant that kills pests and weeds, then covering the ground with plastic to hold the gaseous chemical in.
18.
Soil fumigants metam sodium, the biocide that poisoned the Sacramento River in 1991 after a train derailed, and Telone, a replacement for metam sodium and methyl bromide, were the most popular carcinogens and reproductive toxicants, the study found.
19.
Bush and Kerry also answered four other questions on farm labor, fighting pests and diseases, country-of-origin labeling and supporting an exemption from the 2005 ban on use of methyl bromide, a soil fumigant important to Florida's strawberry industry and other growers.
20.
The pesticide, a banned soil fumigant called DBCP, has filtered into ground water in some areas and now exceeds federal standards for safe exposure in about 1, 700 wells that serve more than 200, 000 people, according to an analysis by a team of researchers at the University of California-Berkeley's School of Public Health.
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