524.2 THMs 120 ml 2-40ml VOA vials 2-6 C, ascorbic acid, HCl in field 14 days 504.1 EDB/DBCP 280 ml O2-40ml VOA vials -6 C, Na 2 S 2 3 14 days 508 Pesticides S1000 ml 11L amber G 2-6 C, Na 2 2 O 3 7,14 days 515.1 Herbicides 1000 ml 1-1L amber G 2-6 C, Na 2 S 2 O 3 14,28 days