SECTION 252:690-3-13. Background monitoring location  


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  • (a)   Streams. The permittee must collect background samples at a point away from the stream bank, as close as is feasible to the channel, immediately upstream of the point of discharge, but not affected by it.
    (b)   Lakes. The permittee must collect background samples at a point away from the waters edge and outside the regulatory mixing zone.
[Source: Added at 19 Ok Reg 1721, eff 6-13-02]