Denman Island Natcrsheds

c -- 11 . '. /I

Province of British Colunbio I Ministry of Er!vi.r.cnment I Water Investigations Branch I . I I i- c t I I 1 F. Chwojka Te c hni ci an Groundwater Section I Hydro1 ogy Di vi s ion I I I P I Victoria, B.C., ?day I979 li TABLE OF CONTENTS 1 I Page LF I Table of Coriterlts ...... ii List of Figures ...... -.. iii 1 List of Tables ...... iii I 1 1. Introduction ...... I . 2. Location, Size and Climate ...... 1 I 3. Topography a~c! Drainage ...... 1 4. General Geology ...... 2

8 I 5. Bedrock Geology ...... ' ...... 2 1 6. Surficial Deposits ...... 3 7. Groundwzter Occurrence ...... 3

..8. Well Inventory ...... 3 I I 9. Groundwater Recharge ...... 4

1 10. Well Distribution 2nd Groundwater Use in Each Watershed ...... 6 I 11. Gromchater Chemistry ...... 7 .. 12. Concltlsions ...... 8 I 13. Recommendations ...... 9 I 14. . References ...... 10

1 E I I 1 r -a I LIST OF FIGURES t

Figure 1 Location Map ...... W 11 Figure 2 Denman Island Natcrsheds ...... 12 Figure 3 Geological Map ...... Pocket Figure 4 Water Well Lccati.cn Map ...... Pocket Figure 5 Distribution of 1974 Water Sampling Sites . . 13 Figure 6 Distribution of 1973 Water Sampling Sites . . 14

Figure 7 Distrlbuticn of Total Dissolved Solids in Groundwater ...... 15 Figure 8 Distributjon of LCh1ori.de i.n GrounGwater ... 16 Figure 9 Distribution of Hardness in Groundwater ... 17

LIST OF TABLES

-..--r-Paee Table 1 Precipitation Kerns for the Period 1941-19?0 for Penman Islad ...... ,. 18 Table 2 Estimates of Groundwater Recharge and Usage . 19 Table 3 Result of 1973 Water Sampling (from Cooper 1973) ...... ; 20 Table 4 1973 Water Sampling Sites ...... 21

LIST OF APPENDICES '*

Appendix 1 Well Inventory - Denman Island (Pzges 1-9)

Appendix 2 Chemical Analysis (Sites 2490589-1400626)

c I PRELIMINARY REVIEW OF I I GROUNDiVATER CONDITIONS AND AVAI LAB1 LITY ou I . DENMAN ISLAND, BRITISH COLUMBIA

I 1. INTRODUCTION With population growth increasing in the Gulf Islands, the demand I for fresh water becomes very important. This preliminary review deals with the known groundwater conditions of Denman Island. It was prepared to show present groundwater use and potential groundwater supplies.

.A list of all known wells, a well location map and a watershed map for the Island are included in this preliminary report. Estimates of groundwater recharge and usage within each watershed have been calculated, bsed on average precipitation considerations. Available .water quality informsticm on groundwaters for the Island has also been reviewed.

* 2. LOCATION, SIZE AND CLIMATE ..

Denman Island is located on the east side of Vancouver Island, 14 miles south of Courtenay (Figure 1). It can be,reached by scheduled ferry from Vancouver Island and has approximately 500 residents. In 1976, there were 795 people living on Denman Island and Hornby Island, with about 300 on Hornby.

Denman Island covers 13,000 acres or 2C square miles. Its climate is warm in summers with mild, wet winters. The average annual precipitation is 53 inches. The yearly distribution of rainfall and snowfall are shown in Table 1. Precipitation rr.zans for the period 1941 to 1970 are from Environ- ment Canada (1970).

I 3. TOPOGRAPHY AND DRAINAGE Denman Island is a Lorthwest trending island with a dominant ridge I paralleling its west coast (Figure 2). rilaximum elevations of 400 feet occur along this topographic feature. Local relief is generally less than 300 feet. I Seven watersheds make up the island's drainage system (Figure 2): Denman, i 1 'I '. 2 I Boyle, Hornby, Central , Roirias, Chicadee and Henry. L.

I The largest watershed areas are Denman on the west side coverhg 24% of the island, Central in ths middle of the island taking up 27%, and I Horriby on the southern half with 18%. 1 4. GEENER4L GEOLOGY Denman Island is irnderlain by three sedimentary bedrock formations, I all part of the Nariaimo Group of Upper Cretaceous age,. These formations hav*e been designated the Cedar District, de Courcey and Northurnherland 1 Formations (Cooper 1973). Two unconsolidated surficial units are also recognized on the islaid. I These include the Quadra Sediments and the Salish Sediments. The Quadra Sediments cover about i/6 of the northern portion of Denman Island, while 1 the Salish Sediments occur only at the northern- tip of the island (Figure 3). I 5. --EEDROCK GEOJXGY The Cedar District Fomation is found on almost the mtire west coast: of Denman Island and measures up to 1,000 feet in thickness (Muller 1977). 1 It is made up of marine shales cut by sandstone dykes. The shales include clay, silt and fine sand size particles and are dark grey or dark greenish I in colour. The sandstone dykes range in thickness from 2 'to 8 inches in width and are dark to light brown. From earlier studies this fornation was I interpreted as an offshore marine deposit be.cause the fine laminations suggest it was deposited in deep waters free from wave action (Muller 1970). I *The de Courcey Formation overlies the Cedar District formation and is comprised of massive beds of brown-grey sandstone with interbedded, poorly I sorted conglnmerate. Total thickness is estimated to be 900 to 1,000 feet. S The sandstone ranges from medium- to coarse-grained and the conglomerate 1 fragments rag? Trcrn fine pebbles to boulders in a fine-grained sand matrix. This formation is believed to be a deltaic deposit because of the presence i of interbedded conglomerates ad sandstones. I - I 3

I I The Northimberland Formation is found on the nid-east coast of Denma? Island and overlies the de Courcey Formstion. The finc-grkkd sandstone, I siltstone and shale beds are said to be 300 feet thick [Nuller 1970). Like the Cedar District Formation, this unit is also believed t~ be a marine a depos it . I 6. SURFICIAL DEPOSITS The Quadra Sediments consist of sand, silt, gravel and clay up to 300 feet thick and are dated at more than 49,000 years before present I (Dyck et al, 1966). I The Salish Sediments a-e marine deposits and are comprised of reworked Quadra Sediments and consist of boulders, gravels, sands, silts and clays.

I 7. GROUNDWATER OCCURRENCE On Denman Island groundwater can be found in both the bedrock and 1 the surficial deposits. Good to excellent sources of groundwater are found in the unconsolidated deposits. In the Salish and Quadra Sediments in the I northeast portion of the island, springs form adequate year-round fresh water supplies. Other springs occurring locally above clay beds indicate perched I water tables in some areas. Fair to good sources of groundwater occur alc#iig faults in the bedrock and may also be found at conglomerate-sandstone or I shale-sandstone ' contact bedding planes. Bedrock areas which are not suffi- ciently fractured or where structural conditions are unfavourable msy only I yield poor to fair quantities of groundwater (Cooper 1973). I a. WELL .INVENTORY From Groundwater Section files to September 1977, records are avail-

aLle of 35 dug walls with an average depth of 14 feet and 78 drilled wells $ I with an averege depth of 130 feet. The deepest dug well is 32 feet and the deepest drilled well is 430 feet. Total footage for dug wells is 1,226 feet I and for drilled wells, 10,157 feet. Locations of wells and springs are I shown in Figure 4. All wells on file are listed on pages 1 to 9 in Appendix 1. I I i 4 I i Tne oldest entry is a spring recorded in 1920 and the.& oldest drilled well dates back to 1959 with many entries without coinpletion dates. From I * the 171 sources of water, 35 or 20% of them have site identific2.tion numbers for sampling purposes. Bemistry results are attached; see computer forms i for sites between numbers 1400588 and 1400626 in Appendix 2. The best producing well on the island has been reported at 30,gpn:. - I The average for drilled wells with reported yields is 4-1/2 'gprn. Ancngst the dug wells and springs there is one reported to yield 15 gpm. The average 1 for dug wells with reported yields is 7 gpm. These figures are based on dri'llers' reports and reported yields by residents. They can be pumping I test results, bailer test yields or open pipe flow estimates. Distance to water in dug wells ranges from 0 to 25 feet with afi I average of 9.5 feet. Distances to water in drilled4wells vary from 2 to 50 feet with one recorded at 218 feet. Average distance to water is 19.5 feet I on the island. 9. G ROW! D\'!ATE R RE CHARGE i From Environment Canada precipitation data, (Table 1) the average amount of precipitation for Denman Island for the period 1941 to 1970 was I 52.7 inches per year. This ,total is made up from 48.6 inches of rainfall and 41.0 inches of snowfall. Snowfall, however, is taken as only 10% or I 4.1 inches of water equivalent. Estimated potentia! recharge from precipitation (Foweraker, 1975) 1 was calculated for Maj-ne Island on the basis of 1 inch per year. However, Foweraker found that his calculations exceeded by several times the esti- I mated storage availablc for groundwater within the fractured bedrock media, leading him to believe that on an annual basis storage and permeability, and I not precipitation, appear as *he more immediate limiting factors controlling ? groundwater availability on the islands, particularly during the dry summers I and early fall periods. Table 2 has been prepared to show the estimated potential recharge I (based on this 1 inch of precipitation a year) and the groundwater usage for watersheds on Denmaii Island on which only a thin overburden cover exists over I 1 5 I I bedrock. Groundwater usage is calculated on the number of wells per watershed A and taking each well as using 500 USgpp for a period of 160 days. The per- 1 centage of the estimzted potential recharge used is called the "percentage groundwster usage". For example, in Table 2 using the "Denman" watershed I (No. 1) : Groundwater usage x 100 Percent groundwater usage = l"/year recharge from precipitation 6 ., 1 - 3.70 x 10 US gals. x 100 6 99.3 x 10 US gals.

I precipitation) I Unlike the Mayne Island study mentioned above, on Denman Islaid we have .no detailed information or calculations of structural thickness of the potable water-bearing zone between the water table and the underlying non- 0 I potable zone. Therefore, the Table 2 figures given for "available bedrock storage" are based ~n a conservative "model" only, in which the thickness of I the potable water-bearing zone is taken as only 200 feet and the storage -4 coefficient(s) as 10 or .01%. This gives a conservative figure for stor- 1 age as we know some wells are greater than 200 feet deep and supply satisfactory groundwater. Based on this "model", the groundwater and storage 6 1 available in the bedrock is 23.9 x 10 US gals. This is approximately one quarter of the value of 99.3 x lo6 US gals. for estimated potential recharge 1 available from precipitation for the same watershed. Percent groundwater usage appears therefore to be much higher when based on the available bedrock storage value, as we can see below. 1 (Groundwater usage) x 100 Percent groundwater usage = Velum; in storage * 6 1. -. (3.7 x 10 US gals.) x 100 23.9 x lo6 ne* I = 15.48 % (based on a bedrock model with *-9 a 200-foot thick water-bearing ,011 % zone and an "s" vaiue of .01)d op

I_ J L see( I It should also be mentioned that on the northeast part of Denman Is.l%nd, watersheds No. 5 and No. 7 and part of watersheds No. 6 and No. 4 are covered I with unknown thicknesses of unconsolidated surficial deposits. Storage I I I I 1 6 coefficient values may be expected to be quite different from.. those used in the bedrock model for the "Dennan" watershed (No. 1). Uritil more information I is available from well tests and drilling, it is not possi5le to create a meaningful theoretical model for available groundwater storage for the water- I sheds that are partly or completely lying within these surficial unconsolidated deposits. However, at the present time this is not a mzjor concern in 1 calculating percent storage and groundwater use because the .majority of th? wells on Denman Island lie within the bedrock watersheds No. '1, No. 2 and . 1 No. 3 for which we have estimates of storage and use. I 10. WELL DISTRIBUTION- AYD-- GROUNDWATER USE IN EACH WATERSHED I. The "Denman" drainage area (see Figures 2 and 4) reaches from Yellow Rock past Repulse Point, Metcalf Bay along the west side of the island north -e---- e 1 to Denman Point and up towards Henry Bay. In this watershed most of the wells for the island are found: 48 dug wells and 26 drilled ones. The best pro- I ducing well is reported to yield 15 gpm. Average depth for dug wells is 11 feet and' 113 feet for drilled wells. Groundwater usage as a percentage I of groundwater in storage in the bedrock is 15.S% for the penman drainage area. While most of the wells are for domestic use in this area, some are I used for irrigation and cattle. a The lfBoyle" watershed on the southern tip of Denman Island has 6 dug I wells and 10 drilled wells. The best well produces 20 gpm and all knoxn yields average 4 gpm, and are for domestic use only. Groundwater usage is I estimated at 22.2% of the groundwater in storage in the Boyle watershed. Dug wells average 11 feet in depth and drilled wills average 199 feet in depth. I 3. ,The "Hornby" drainage area around GrahamLake, east to the Strait of Georgia and south towards Boyle Point, has 12 dug wells and 3 drilled ones. Groundwater usage is for cattle and domestic .connections; less than 52of I *. T the groundwater in storage appears to be utilized from wells in this area. I d The "Central" drainage area in the centre of Denman Island slopes gently towards the coast to Fillongly Provincial Park on the east side of I the island. This area has 23 dug wells and 4 drilled ones. The best reported yield is 30 gprn with only 4 known pumping rates for 27 wells. I .I 1 - . 7 D 1 Dug wells average i3 feet in depth and drilled wells average 114 feet in CI depth. The water is mostly for domestic use with some irrigation an3 for 1 cattle. In the Provincial park it is used for campers and visitors.

s'.There are TIO records in our files of wells drilled in the "Kcmas" I drainage area along the northeast coast of Denman Island. I 6. The "Chicadee" watershed around Chicadee Lake and north towards Henry Bay has only one listing, a dug well west of Chicadee Lake, 9 feet deep and 1 no known yield. * 1 The "Henry" drainagc areaon the northern tip of Denman Island aqd around Henry Bay has also one dug well, dating back to 1940 with no knom I yie Id.

I 11. GROUNDWATER CHEMISTRY

The Groundwater Section has presently on file 34 sampling sites on I Denman Island. Ciemistry analyses for these sites are shown in Appendix 2. Figure 5 shows thc distribution of sampling sites throughout the island. I Nineteen sites are dug wells and 12 are drilled wells. Chicadee Lake, Parsons Creek and a spring are additional sample sites. Most of the sampling was 1 carried out during the summer of 1974 within the Denman watershed with 17 wells sampled.

I In 1973, 20 water samples were collected by Cooper. These sites Ere shown in Figure 6. These samples were tested :or the following constituents: I Cobalt (Co), Lead (Pb), Calcium (Ca), Sodium (Na), Magnesium (Mg), Potassium (IC), Copper (Cu), Zinc (Zn), Tem?erature (OC) and pH. All concentrations are in I parts per. million and listed separately (Table 3). Eleven of the 20 samples have site identification numbers and were sampled again in 1974 as previously described. Their locations hv section, well number and site number (Figure 6) 4 J I are given in Tabln 4. % I The water quality is generally very satisfactory. From the distribution of totni dissolved solids, Figure 7, only 2 wells show values in excess of 1 000 mg/L. Both are drilled wells, 114 feet and 87 feet deep, with only I 17 to 20 feet to water. One is on the southwest side of Denman Island I (No. 1400604) and the other is on the southeast coast (So. 1400616). Both 1 I 8 * I are close to rhe shoreline. Chloride values for both wells, Figure 8, ere particularly high (1 260 and 500 mg/L respectively). Other-high chloride I values occur close to the southeast coast (No. 1400611) and on the northwest side of the islaid (No. 14006i)7). These analyses may indicate that seawateT I encroachment is occurring at these locales. Hardness is not a problem on the islcmd (Figure 9). Only one well has hardness in excess of the reccm- I mended standard of 183 mg/L. 1 12. CONCLUSIONS Based on available information, most wells on Denman Island supply water to individual homes only. It would appear that available groundwater 1 storage in the bedrock is the major 1.imiting factor cantrolling groundwater availabitity. Recharge from precipitation is therefore limited to available 1 nonsaturated storage at any time. Present groundwatier usage on an annual basis does not appear to be exceeding natural recharge or available ground- I water supplies in storage.

, The average depth of wells on Denman Island is 130 feet and drilling I is often stopped as soon as sufficient water is encountered. The best producing well on the island has been reported at 30 gprr,, and the average for 60 drilled wells with reported yields is 4.5 gpm. The best dug well is 1 I) reported to yield 15 gpm and the average for 6 dug wells with reported yields I! \ 1 is 3.5 gpni. . The groundwater on Denman Island is generally of a favourable quality I with total dissolved solids generally in the range from 30 to 300 mg/L. There are , however, three sites with chemical consti:uents above recommended I limits (Figures. 6, 7, 8). Total dissolved solids at these sites range from 822 to 2 423 mg;I, nith high chloride values ranging from 370 to 1 260 mg/L. I The best potential for groundwater is found in the unconsolidated deposits. Fair to good groundwater sources can be found along faults in i bedrock and along conglomerate-sandstone or shale-sandstone contacts. I I I I ! 9 , 1 '1 3. KCOMMENDATIONS

.II, Groundwater recharge and usage calculations show that the Denman 1 watershed and the Boyle drainage area are the two watersheds with the mst wells and the highest groundwhter use on Denman Island. There are no obser- 1 vation weils on the island at present and an observation well should be considered in these areas to monitor water level fluctuations over the long term.

I The mat suitable areas in the Denman watershed for an observation well would be near the village, the northwest quarter of Section 18 and south I of Metcalf Bay, the southwest quarter of Section 6. In the Boyle drainage area a monitor well would best be sited in the northwest quarter of Section 7, I northwest of the ferry terminal. A test drilling program and establishment of an observation well 1 should be considered in the Celitral-Komas-Chicadee and Henry watersheds to assess the groundwater potential of the unconsolidated deposits. 1 Three areas, including the southeastern part of th.e island in the Boyle watershed, the southwestern part of Denman Island near Metcalf B3y and I the Denman Point area, both in the Denman drainage area, should be sampled again to show possible variatiorrs in water quality. Field chemical analysis 1 would be satisfactory to delineate the areas with high conductivity and high chloride. All three of these areas have shown high Total Dissolved Solids I and high chloride results in previous sampling. A field inventory should be undertaken to update all recently completed

wells. Also, local residents should be interviewed to determine whether , I specific grouridwater problems are occuring in any areas. I 1 I 1 .I 1 -. 10

I I 14. REERENCES u Coopei-. 1973. A Thesis entitled "The Hydrogeology of Denrm Island, I British Columbia". Dyck, W., J.A. London, J.G. Fyles and W. Blake Jr. 1956. Geological Survey of Canada, Radiocarbon Dates V. Geological Survey of Canada, Paper I 66-48.

Environment Canada. 197G. Temperature aqd Precipitation Means for the Period 1941 to 1970, Denman Islwd, British Columbia.

Foweraker, J.C. 1974. Groundwater Investigations 011 !!ayne Island, Report I No. 1, Evaluation, Cevelopment and Management of the Groundwater - Resource on Mayne is laid. Internal Rq~ort, Gromdwater Division, Water Investigations Branch, Departiient of Lads, Forests and Water I Fesources Muller, J.E. 1970. Geology of the Upper Cretaceaus Nanpimo Group, Vancouver Island and Gulf Islands, British Columbia. Geological Survey of Canada, I Faper 69-25. L

Muller, J.E. 1977. Geology Map of Vwcouver Island. Open' File 463, I Geological Survey of Canada. I I I I 1. I I 1 I

1400622 1400621 I 100

1400604! \ I400608

...... Ministry of th:? Envit'on.ment WATER SAMPLING SITES IINCH=lMl ...... ENVIRONMEEJTAL AN3 ENGINEEGING SERVICE DENMAN ISLAND ...... ENGINEER- WATER INVEiTIGATIONS BRANCPI DWG. No...... 5...... F.!.?!.. a=.- --**I --**I ---

I! t- NOTE:

QIAMETER OF CiRCLE PROPORTIONAL TO MAGNITUDE OF TQS CONCENTRATION

......

ENVIRONMENTAL AND ...... WGINEEI --I-. WATER INVESTIGATION --......

128 I I' NOTE:- DIAMETER OF CIRCLE PROPORTIONAL TO MAGNITUDE OF HARDNESS CONCENTRATION .-

DATE Province of British Columbia DISTRIBUTION OF SCALE: VERT ...... I INCH = I MILE Ministry of the Environment HARDNESS IN GROUNDWATER IiOR ...... ENVIHONMENTAL AND ENGINEERING SERVICE WATETt II!VESTIGATIONS BRANCH .... !3!?...... '- . !-... TABLE 1

PRECIPITATION MEANS FOR THE PERIOD 1941-1970 FOR DENMA?? ISLAND IN INCHES

Jan. Feb. Mar. Apr. May June July Aug. Sept. Octo NOVO Dec. Year

Mean Rainfall 7.20 4.43 4.35 2.66 1.31 1.45 1.03 1.32 1.93 5.87 8.10 8.90 48.55

Mean Snowfall 16.00 8.20 3.20 0.10 0.00 0.00 0.00 0.00 0.00 0.00 2.50 11.00 41.00

Mean Total Precipitation 8.80 5.25 4.67 2.67 1.31 1.45 1.03 1.32 1.93 ' 5.87 8.35 10.00 -52.65 TABLE 2

ESTIMATES OF GROUNDWATER REalARGE, STORAGE AND USAGE IN WATERSHEDS WITH WIN OVERBURDEN OVER BEDROCK

Groundwater us age as Avai 1ab le Recharge in Recharge in Number Usage @ % of Bedrock acdrock Storage Bedrock Storage ofPercent Usage Drainage(Watersheds) Areas SquareMiles Acres @ Acre-feet1 in./yr. Gallons@ 1 in./yr. (US) Wellsof per Well"gpd 1 in./yr. Volulne in Based on 0.01% Based on 0.01% Stor ape Acre-feet In Acre-feet in Gallons (US) (zool De&,) / for 100 Days (200' Depth) (ZOO1 Depth) (200' Depth) - 23.9 x 106 1. Dermal 5.727 3,665 305 99.3 x 10 74 3.70 x 106 3.7 733,000 73.30 15.48

6 2. Boyle 0.871 558 47 15.3 x 10ti 16 0.80 x io 5.2 111,600 11.16 3.6 x 10 22.22

6 472,400 ' 47.24 15.4 x 10 5 3. Honby 3.691 2,362 197 64.2 x 10 15 0.75 x 30 1.2 4.87

i TABLE 3

RESULTS OF 197.3 WATER SAMPLING (All concentrations in part per million) , (From CooDer 1973) Elemnt CO Ph Ca Na M g K cu . Zn Tsmp, 9.1; Recoi~tmded 6.5- 0.05 200 N.A. 150 , ’ .. N.A.. . . . , .1...0. . , 5.0 15OC Lipit* . N.A. 8.3 SzT1e Kell No: 1 - 0.163 21.353 8.507- 1.435 6.760 0.327 11.500 14 7-10 .. 2 - 0.026 23.525 11.343 57.393 0.296 0.680 --- 5.5it4_ 11 i.60 3 0.022 - 16.4.59 170.146 1.696 149.561 c. 044 1.230 14 7.80 4 0.038 0.008 20 107 ‘ 23.316 -4.034 1.403 3.120 ’ 0.500 11 7.04 - 5 0.042 7.224 10.395 1.957 11275 0.094 0.079 14 7.00 6 0.005 - 14.762 9.768 2.057 0.485 0.205 0.123 - 6. if2 7: 0.029 - 18.218 14.494 3.587 0.446 0.980 0.321 - 6.58 8 .. - 21,357 20.165 3.392 0.319 0.044 0.085 13 7.30 9 - 0.030 53.3S6 31.508 - 0.957 0.017 0.017 - 10.30 -- -- - 10 -. - 2.513 113.431 0.783 3.954 0.017 0.024 15 5,6q __-._- -- 11 - - 6.232 13.234 2,152 0.61.2 0.300 0. G18 14 5.62 12 0.c25 - 12.250 6.192 4.696 0.705 0.036 C. 016 11 7.55 1 13 0.017 - 14,752 8 852 5.740 ., 0.344 0.027 0.03.4 10 7.74 14 - -0.143 14.134 18,905 3.914 0.833 0.243 0 .‘SO0 - 6.68 15 - - 23.871 69.319 1.272 2,870 1.200 0 072 14 7.65 15 o.cc9 - 7,852 23.316 2,609 7,142 0.223 0. ,760 13 6.98 17 0.037 - 10 679 -ZcJ6.180 -_ 0.848 0.574 0.031 0.136 13 7.92 1s - 0,036 5.654 8.132 1.435 0,638 0.028 O.G’Z8 20 7.17

- I E) 19 12.2SC 14.809 1.826 0.038 0.026 1.920 12 , 6.EO 0 ,n J - 0.259 15.846 27.727 3.392 0.765 C. 208 0.780 12 7.04

,.B,C. Ilept: of I-Iealth 1 \ 1 21 1 TABLE 4 1 -_I 1973 WATER SAMPLING SITES I I Sample No. Section Well No. . Site No.

1 28 1 - I 2 27 2 1400607 3 S.L. Scott - I 4 1400603 5 1400625 I 6 .14006@6 7 I- 8 '9 GrahamLake - 1 10 14 1 1400610 11 16 1400615 _- _- 12 - 24

I 13 ~ 24 - 14 16 7 1400622 I 15 6 1 1400608 16 5 3 - 17 . 1 b 27 6 1400590 18 26 1 14005s 1 I 19 20 1 - 20 18 6 1400597 I I I

1 , I I 1 1 I 1 I'

I APPENDIX 1 I WELL INVENTORY - DE+WISLAND .-

I -* (Pages 1-9) I I I I I I I I I LOCATION C 0L4i‘L E T IO M OEPTH CASING OWNER’S NAME ’ -- -1 -1 DATE I DUG 1 ORiLLED 1 QIAM. I LENGTY --- i-

B .5 Ini 1-- i -- I I 63‘ I I I

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‘ I 5k5‘I WATER I I SITE

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- -I---- 21 WELL INVENTORY- DEMMAN ISLAND

C MPLE N 0 lPTH . C\SlNG DISTANCE^ WATER I I SITE 0 T 10 1. DATE DUG -DRILLED DIAM. LENGTH

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23 /

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P WELL INVENTORY- DENMAN ISLAND I LO C AT1 ON C Oh4 PLE 0 N OWNER'S NAME TI DATE

I i 2'

6'6 '' . 190' 6 '/ 3' 215' 6'' /3' 8'

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f- I 1

'1% I - WELL INVENTORY- DENMAN ISLAND LOCI

WELL INVENTORY- DENMAN ISLAND * APPENDIX 2

NMI CAL ANALYSIS

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