Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN: 9780134746241
Author: Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher: PEARSON
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C. Chemical Factors of the River The table below shows the chemical parameters of the two rivers. Compare the parameters to the DENR water quality standard in DAO 2016.-08 and classify the two rivers. CHEMICAL PARAMETERS ALPHA RIVER DELTA RIVER 6 2 1 Dissolved Oxygen (mg/L) minimum 7 14 2. Nitrate (mg/L) 0.5 6 3. Phosphate (mg/L) 7.0 9.0 4. pH 4.5 5. BODS 12 Table 1. Water Body Classification and Usage of Freshwater Classification Intended Beneficial Use Class AA Public Water Supply Class I - Intended primarily for waters having watersheds, which are uninhabited and/or otherwise declared as protected areas, and which require only approved disinfection to meet the latest PNSDW Class A Public Water Supply Class II - Intended as sources of water supply requiring conventional treatment (coagulation, sedimentation, filtration and disinfection) to meet the latest PNSDW Class B Recreational Water Class I - Intended for primary contact recreation (bathing, swimming, etc.) Class C 1. Fishery Water for the propagation and growth of fish and other aquatic resources 2. Recreational Water Class II - For boating, fishing, or similar activities 3. For agriculture, irrigation, and livestock watering Navigable waters Class D Note: For unclassified water bodies, classification shall be based on the beneficial use as determined by the Environmental Management Bureau (EMB). Table 3. Water Quality Guidelines for Primary Parameters Unit Parameter Water Body Classification AA A B C D SA SB SC SD BOD mg/L 1 3 5 7 15 n/a n/a n/a n/a Chloride mg/L 250 250 250 350 400 n/a n/a n/a n/a Color TCU 5 50 50 75 150 5 50 75 150 mg/L 5 5 5 5 2 6 6 5 2 Dissolved Oxygen) (Minimum) Fecal Coliform Nitrate as NO3-N MPN/100mL <1.1 <1.1 100 200 400 <1.1 100 200 400 mg/L 10 10 7.0-8.5 6.5-8.5 pH (Range) Phosphate mg/L 7 7 7 7 15 10 15 6.0-9.0 6.5-8.5 6.5-8.5 6.5-8.5 6.5-9.0 6.0-9.0 7.0-8.5 7.0-8.5 <0.003 0.5 0.5 0.5 5 0.1 0.5 0.5 5 26-30 26-30 26-30 25-31 25-32 26-30 26-30 25-31 25-32 50 80 110 25 110 Temperature (b) °C Total Suspended Solids mg/L 25 65 50 80 Notes: MPN/100mL Most Probable Number per 100 milliliter n/a-Not Applicable TCU-True Color Unit (a) Samples shall be taken from 9:00 AM to 4:00 PM. (b) The natural background temperature as determined by EMB shall prevail if the temperature is lower or higher than the WQG; provided that the maximum increase is only up to 10 percent and that it will not cause any risk to human health and the environment. 1. Classify the two rivers. Explain your answer.
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Transcribed Image Text:C. Chemical Factors of the River The table below shows the chemical parameters of the two rivers. Compare the parameters to the DENR water quality standard in DAO 2016.-08 and classify the two rivers. CHEMICAL PARAMETERS ALPHA RIVER DELTA RIVER 6 2 1 Dissolved Oxygen (mg/L) minimum 7 14 2. Nitrate (mg/L) 0.5 6 3. Phosphate (mg/L) 7.0 9.0 4. pH 4.5 5. BODS 12 Table 1. Water Body Classification and Usage of Freshwater Classification Intended Beneficial Use Class AA Public Water Supply Class I - Intended primarily for waters having watersheds, which are uninhabited and/or otherwise declared as protected areas, and which require only approved disinfection to meet the latest PNSDW Class A Public Water Supply Class II - Intended as sources of water supply requiring conventional treatment (coagulation, sedimentation, filtration and disinfection) to meet the latest PNSDW Class B Recreational Water Class I - Intended for primary contact recreation (bathing, swimming, etc.) Class C 1. Fishery Water for the propagation and growth of fish and other aquatic resources 2. Recreational Water Class II - For boating, fishing, or similar activities 3. For agriculture, irrigation, and livestock watering Navigable waters Class D Note: For unclassified water bodies, classification shall be based on the beneficial use as determined by the Environmental Management Bureau (EMB). Table 3. Water Quality Guidelines for Primary Parameters Unit Parameter Water Body Classification AA A B C D SA SB SC SD BOD mg/L 1 3 5 7 15 n/a n/a n/a n/a Chloride mg/L 250 250 250 350 400 n/a n/a n/a n/a Color TCU 5 50 50 75 150 5 50 75 150 mg/L 5 5 5 5 2 6 6 5 2 Dissolved Oxygen) (Minimum) Fecal Coliform Nitrate as NO3-N MPN/100mL <1.1 <1.1 100 200 400 <1.1 100 200 400 mg/L 10 10 7.0-8.5 6.5-8.5 pH (Range) Phosphate mg/L 7 7 7 7 15 10 15 6.0-9.0 6.5-8.5 6.5-8.5 6.5-8.5 6.5-9.0 6.0-9.0 7.0-8.5 7.0-8.5 <0.003 0.5 0.5 0.5 5 0.1 0.5 0.5 5 26-30 26-30 26-30 25-31 25-32 26-30 26-30 25-31 25-32 50 80 110 25 110 Temperature (b) °C Total Suspended Solids mg/L 25 65 50 80 Notes: MPN/100mL Most Probable Number per 100 milliliter n/a-Not Applicable TCU-True Color Unit (a) Samples shall be taken from 9:00 AM to 4:00 PM. (b) The natural background temperature as determined by EMB shall prevail if the temperature is lower or higher than the WQG; provided that the maximum increase is only up to 10 percent and that it will not cause any risk to human health and the environment. 1. Classify the two rivers. Explain your answer.
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