00941nam a22001937a 4500 20230427153325.0 230422b |||||||| |||| 00| 0 eng d HSLRC HSLRC HSLRC TD 430 V36 2019 San Jose, Nina Elaine C. 29988 Determining the pH level of water in different water stations in Barangay Concepcion Uno, Marikina City in correspondence to the environment protection agency standards with the use of litmus paper. Marikina City March 2019 vi, 55pages; illustration; 28cm Includes: references and appendices 1. Drinking water -- Philippines -- Standards 29989 Mary Margarette R. Montalla, Louise Sheanne S. Opeña, Darren Paul S. Pascual, Arthur Vince Ivan P. Racoma, Jose Emilio V. Ricafrante and Leandro M. Zamora 30309 lcc THE 88200 88200 0 0 lcc 0 0 HSLRC HSLRC THE 2023-04-22 TD 430 V36 2019 THE0688HS 2026-07-09 07:37:24 1 2023-04-22 THE