TM98-02 Reporting Changes for Selected Organochlorine Constituents from Schedule 1325 and Schedule 1335 - Minimum Reporting Levels, Qualified Data, Surrogates, and Elimination of Two Constituents

This technical memorandum announces changes in data reporting for all constituents in NWQL schedule 1325 (Insecticides and Gross PCBs in Bottom Material; Wershaw and others, 1987) effective December 15, 1997. The changes also are applicable to schedule 1335 (Organochlorine Insecticides, Gross PCBs, and Organophosphate Insecticides in Bottom Material) which is a combination of schedules 1325 and 1320. Minimum reporting levels are changed for 15 method constituents, all detections of methoxychlor are qualified as "estimated", additional surrogates are included, and two constituents (perthane, lab code 342, and gross polychlorinated naphthalenes, lab code 395) are deleted. Reporting changes are listed in table 1. No changes are being made to constituents in schedule 1320 (Organophosphate Insecticides in Bottom Material).