TM99-09 Removal of Two Constituents from Lab Schedules 1324 (Organochlorine Pesticides in water and 1398 (Low-Level Organochlorine Pesticides in water) and Addition of One or Two Surrogates to Lab Schedules 1324, 1364 , 1398, and 1608.

This technical memorandum announces the removal of two constituents, perthane and grosspolychlorinated naphthalenes (PCNs), from the National Water Quality Laboratory lab schedules 1324 and 1398. In addition, two new surrogates have been added to the following schedules: 1324, 1398, and 1608. Lab schedule 1364 will only have one new surrogate added.