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March 11, 2019 Rommel C. Imbuido, MD Deputy Head for Diagnostic, Environmental Health & Sanitation To: Mr. Bernard T. Sese, MD, MPM QIC, City Health Office To whom it may concern, Good day! We are Grade 11 Senior High School Students from Jose Rizal University! We are writing this letter to formally request certain test needed for our science investigatory project namely, DIY Solar Powered Water Purifier. As part of the investigation, we were asked to conduct a test on our product, specifically, its total colliform, pH level, and turbidity level. Rest assured that the results from this test will only be used for the sole purpose of our research and that our guardians as well as our Subject Teacher are informed of this matter. If you have any questions, please contact John Lorence Villamin, Jose Rizal University General Physics Teacher at [email protected]. Thank you for your assistance in this matter. Sincerely, Franchesca Dyne Romarate GRADE 11, STEM STUDENT