A presentation by Golder Associates to Township of Langley Council on a proposed Aldergrove fish farm, Jan. 18, 2010.

1. Hydrogeological Assessment Phase 1 Information Review PROPOSED GRAVEL EXTRACTION AND AQUA-FARMING OPERATION 753-264th STREET ALDERGROVE, BC Matthew Munn Jill Sacre January 18, 2010

3. Step #2 - Identify Data Gaps

8. Clay will be placed within the aquaculture pond excavation to form four pond “cells”

9. Base of aquaculture cells will be underlain by a sand layer “drainage system” to intercept incidental leakage

11. Groundwater will not be extracted on-site for facility use

13. BC Ministry of Environment’s Water Resources Atlas

14. Township Groundwater Modelling (Golder, 2005)

15. Township Vulnerability Mapping (Golder, 2005)

16. Piteau Associates Ltd. (April 1996)

18. High vulnerability to contamination (MoE)

19. Sand/gravel commonly exposed at ground surface

20. MoE Aquifer #34

21. Low vulnerability

23. Unregistered wells?

24. 17 water licence POD’s in vicinity

25. 14 licences on PH Creek

27. Water table measured at 5 to 6 m-bg on Property (April 9, 1996)

29. Water table measured at 5 to 6 m-bg on Property (April 9, 1996)

31. Water table not encountered in Test Holes (June 12, 2009)

32. No MW’s installed

34. Step #2 - Identify Data Gaps DATA GAP = Absence or deficiency of information required to satisfy impact assessment objectives X

36. Identify groundwater receptors: - confirm water licence intake field locations - confirm all water well locations and intake depths

38. Identify groundwater receptors: - confirm water licence intake field locations - confirm all water well locations and intake depths

39. Characterize development-groundwater interactions: - excavation depths relative to water table - drainage system depths relative to water table - locations of excavations and ponds - locations of geothermal array and compost pad UNKNOWN

40. X Step #3 - Recommendations (Phase 2)

42. Determine which of Piteau’s 1996 MW’s are functional/viable

43. Drill four to eight additional on-site MW’s on Property perimeter and within confirmed gravel extraction areas, to confirm Aquifer thickness and facilitate groundwater monitoring program

45. Estimate maximum allowable excavation depths, as per typical ALC requirements

47. Unconfined = highly vulnerable to surface contaminant sources

48. Second deeper aquifer = low vulnerability

49. Confirmed and projected water depths (Piteau, 1996) infer proposed excavation depths of 4.5 to 6.2 m will directly intercept the Aquifer water table

52. Hydrogeological Assessment Phase 1 Information Review PROPOSED GRAVEL EXTRACTION AND AQUA-FARMING OPERATION 753-264th STREET ALDERGROVE, BC Matthew Munn Jill Sacre

53. Hydrogeological Assessment Phase 1 Information Review PROPOSED GRAVEL EXTRACTION AND AQUA-FARMING OPERATION 753-264th STREET ALDERGROVE, BC Matthew Munn Jill Sacre

54. Introduction Township resolution (July 20, 2009) commissioned an “independent hydrogeology study” to identify and evaluate potential impacts to groundwater resources resulting from gravel extraction and aqua-farming activities proposed for the property at 753 - 264th Street, Aldergrove BC. ALC issued agreement-in-principle (May 7, 2009) with conditions the Owner assess “ … any potential risk to the aquifer or use of the aquifer on adjacent lands …(and) determine the precise location and depth of the aquifer underlying the entire extraction and aquaculture facilities …”

56. Step #2 - Identify Data Gaps - Interpret local groundwater conditions - Identify additional data required to assess potential groundwater impacts and/or fulfill agency requirements

58. Entire property within ALR

59. Perry Homestead Ck.

64. Excavation depths will vary: - aquaculture ponds: 6.2 m - water detention and overflow ponds: 4.5 m - wetlands area: 2.5 m deep - geothermal array: unspecified depth and location

65. Clay will be placed within the aquaculture pond excavation to form four pond “cells”

67. Facility operations will depend entirely on incident rainfall to satisfy water requirements

68. Groundwater will not be extracted on-site for facility use

70. BC Ministry of Environment’s Water Resources Atlas- Regional-scale aquifer mapping and classification - Registered water supply well summary - Surface water licence summary

72. Piteau Associates Ltd. (April 1996) - Examined geology and groundwater depths within a formerly proposed 35 acre gravel extraction area - Directly explored water table depths within central and western Property areas

74. High vulnerability to contamination (MoE)

75. Unconfined

76. Sand/gravel commonly exposed at ground surface

77. MoE Aquifer #34

78. Low vulnerability

80. Modelling also identified a deeper aquifer (Aldergrove Quadra) below the Property that is separated from the Abbotsford- Sumas Aquifer by a 40 to 50 m thick silt/clay layer

82. 10 north of PH Creek

83. 15 west or south of Property

84. Unregistered wells?

85. 17 water licence POD’s in vicinity

86. 14 licences on PH Creek

88. Sand/gravel to full depths drilled at all locations

89. Five holes converted to MW’s

90. Water table measured at 5 to 6 m-bg on Property (April 9, 1996)

92. Primarily sand/gravel to full depths

93. Water table not encountered in Test Holes (June 12, 2009)

94. No MW’s installed

95. Flow directions not confirmed

97. Identify groundwater receptors: - confirm water licence intake locations - confirm all water well locations and intake depths

99. Identify groundwater receptors: - confirm water licence intake field locations - confirm all water well locations and intake depths

100. Characterize development-groundwater interactions: - excavation depths relative to water table - drainage system depths relative to water table - locations of excavations and ponds - locations of geothermal array and compost pad UNKNOWN

102. Determine which of Piteau’s 1996 MW’s are functional/viable

103. Drill four to eight additional on-site MW’s on Property perimeter and within confirmed gravel extraction areas, to confirm Aquifer thickness and facilitate groundwater monitoring program

105. Estimate maximum allowable excavation depths, as per typical ALC requirements

107. Unconfined = highly vulnerable to surface contaminant sources

108. Second deeper aquifer = low vulnerability

109. Confirmed and projected water depths (Piteau, 1996) infer proposed excavation depths of 4.5 to 6.2 m will directly intercept the Aquifer water table

112. Hydrogeological Assessment Phase 1 Information Review PROPOSED GRAVEL EXTRACTION AND AQUA-FARMING OPERATION 753-264th STREET ALDERGROVE, BC Matthew Munn Jill Sacre