…ither the federal MCL or background concentration, for two consecutive sampling events, consistent with §§ 257.95(e) and (h). Additionally, the owner or operator must include documentation that the system meets a subset of performance standards at §§ 257.91(a) through (e), 257.93…

…recoverable, nanograms per liter Water None None None None Dissolved None Agree 19023 PCB 74, wf ng/l OPC PCB congener 74, water, filtered, recoverable, nanograms per liter Water None None None None Dissolved None Agree 19024 PCBs 70 + 76, wf ng/l OPC PCB congeners 70 plus 76, wa…