The level of the cancer agent tetrachlorethylene used for cleaning semiconductors at one of the plants was 9, 400 times the permissiblelimit.
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2.
If teachers across the system pushed their marks to this permissible upper limit, it would see an increase in marks which would not be detected by the moderation process.
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3.
This was why the Court concluded that it was permissible for the law to limit how much an individual could contribute to any particular campaign.