Evaluation of Septic Tank and Subsurface Wetland for

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Confidence Interval Sample Calculation: Determine 90% confidence interval for RT3 Total Nitrogen X Z σ n ± ( α /2) For 90% α = 1-0.9 = 0.1 Using the t-Table α /2 = 0.05 (this is called p for the table so p = 0.05) degrees of freedom (df) = sample size – 1, or n – 1 df = 7-1 = 6 = 7.8 ± (1.9432) 7.094 7 = 7.8 5.2 ± There is 90% confidence that the mean is between 2.6 and 13.0. 67
Appendix 4 - Conductance of Water Corrected for Temperature Conductance (μmho) Sample 17-Aug 21-Sep Pisgah septic inlet 516 230 Pisgah septic outlet 472 232 Pisgah mid-wetland 438 447 Retrieve septic inlet 245 177 Retrieve septic outlet 352 272 Retrieve wetland effluent 575 387 Retrieve wetland effluent duplicate 392 68
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
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plants discharging a volume of 20m
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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 and 40: Laboratory Water Quality Analysis A
Page 41 and 42: NEPA laboratory also does not test
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: Appendix 3 - Determination of 90% C
Page 79 and 80: Appendix 6 - Total Dissolved Nitrog
Page 81 and 82: Appendix 8 - Evapotranspiration Det
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Evaluation of Septic Tank and Subsurface Wetland for

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