00816nam a22001577a 450000500170000000800410001704000240005805000220008210000300010424502030013426000300033730000390036750000400040665000500044670001620049620230427153325.0230422b        |||||||| |||| 00| 0 eng d  6HSLRCaHSLRCcHSLRC  aTD 430 bV36 2019  aSan Jose, Nina Elaine C.   aDetermining 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.  aMarikina CitycMarch 2019  avi, 55pages;billustration;c 28cm  aIncludes: references and appendices  a1. Drinking water -- Philippines -- Standards  a 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