Environment

GMWC monitors process efficiency and quality of effluent discharge to the Petitcodiac River. Representative samples are taken following guidelines specified in the Water Quality –Sampling – Part 10: Guidance on sampling wastewaters (ISO 5667-10). Testing is carried out by GMWC’s own laboratory as well as a local accredited laboratory. Below is an example of recent full year testing results:

2013 Summary operating report

 

Flow

Influent

Effluent

Removal

Removal

NPS*

2013

Daily Average

BOD5

TSS

BOD5

TSS

BOD5

TSS

 

 

m3/day

mg/L

mg/L

mg/L

mg/L

%

%

mg/L

January

60,158

220

240

128

81

42%

66%

25

February

62,447

184

155

135

78

27%

50%

25

March

92,823

119

102

55

57

54%

44%

25

April

90,013

112

143

62

58

44%

59%

25

May

65,535

176

228

80

77

55%

66%

25

June

69,451

150

205

63

68

58%

67%

25

July

72,792

163

239

67

60

59%

75%

25

August

51,501

244

232

69

59

72%

75%

25

September

57,799

288

304

79

68

73%

78%

25

October

46,993

291

302

88

65

70%

78%

25

November

53,350

295

321

88

63

70%

80%

25

December

60,227

183

201

74

52

60%

74%

25

 

 

 

 

 

 

 

 

 

Average

65,257

202

223

82

66

57%

68%

25

NPS: National Performance Standard (Wastewater Systems Effluent Regulations – enacted in June 2012) for Carbonaceous Biochemical Oxygen Demand (CBOD5) and Total Suspended Solids (TSS) is 25 mg/L for both.

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