Evaluation of Septic Tank and Subsurface Wetland for

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(APHA, 1975). Ammonia was measured using Hach Test ‘N Tube Vials according to Hach Salicylate Method 10031 which is for a concentration range of 0.4 – 50.0 mg/l NH3-N. This method converts all ammonia to ammonium so that both are measured. Total phosphorus was determined using Persulphate Digestion Method 4500-P B followed by the Stannous Chloride Method 4500-P D. An Orion model 230A was used for pH determination. Rejection of outlier data was performed according to Standard Method 1010 B (APHA, 1998). Figure 4-5 Dissolved oxygen titration for BOD test. (Photograph by author.) The inter-laboratory comparison of one set of samples indicated that the variation between lab test results for TSS, nitrate, pH and the low range of fecal coliform were within the range of test method variation. The (NEPA) laboratory does not test fecal coliform to completion so high concentrations of fecal coliform were not compared. The 31
NEPA laboratory also does not test total coliform or ammonia and was not yet testing for total nitrogen at the time of this study. The BOD and phosphorus inter-laboratory comparison test results indicated a discrepancy between the two laboratories. Further investigation will be conducted by NWC. 32
Page 1 and 2: Evaluation of Septic Tank and Subsu
Page 3 and 4: Abstract Locally designed wastewate
Page 5 and 6: Acknowledgments Major funding was p
Page 7 and 8: Chapter 6 - Costs ……………
Page 9 and 10: Table 5-6 Parameters Influencing Bi
Page 11 and 12: The predominant geological formatio
Page 13 and 14: plants discharging a volume of 20m
Page 15 and 16: lack access to acceptable excreta d
Page 17 and 18: Critical design parameters for sept
Page 19 and 20: Subsurface Flow Constructed Wetland
Page 21 and 22: inging larger rock from a distant q
Page 23 and 24: Chapter 3 - Site Descriptions Figur
Page 25 and 26: Wetland inlet sample point Flush to
Page 27 and 28: Figure 3-4 Pisgah wetland beds befo
Page 29 and 30: times over a two-week period, grew
Page 31 and 32: Figure 3-7 Retrieve youth in front
Page 33 and 34: Chapter 4 - Methodology Field Data
Page 35 and 36: out (see Figure 4-2). Locating the
Page 37 and 38: Figure 4-3 Media porosity measureme
Page 39: Laboratory Water Quality Analysis A
Page 43 and 44: Since evapotranspiration decreases
Page 45 and 46: The water level in the middle of th
Page 47 and 48: BOD was determined to be 53% at Pis
Page 49 and 50: solids than a sample point that pul
Page 51 and 52: Table 5-4 Ammonia (NH3-N) for Pisga
Page 53 and 54: Table 5-5 Nitrate (NO3-N) for Pisga
Page 55 and 56: o Alkalinity Nitrification and deni
Page 57 and 58: system were measured to be 3.3 mg/l
Page 59 and 60: coliform by 88%. The Retrieve septi
Page 61 and 62: Chapter 6 - Cost of Pisgah and Retr
Page 63 and 64: The septic tanks will have to be pu
Page 65 and 66: Jamaica may refer to the hydraulic
Page 67 and 68: Chapter 8 - References APHA (Americ
Page 69 and 70: Pennant, Joseph, (2005), Assistant
Page 71 and 72: Chapter 9 - Appendices Appendix 1 -
Page 73 and 74: 7-Dec- 2004 SET FIVE Sample BOD TSS
Page 75 and 76: Appendix 3 - Determination of 90% C
Page 77 and 78: Appendix 4 - Conductance of Water C
Page 79 and 80: Appendix 6 - Total Dissolved Nitrog
Page 81 and 82: Appendix 8 - Evapotranspiration Det

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