KALA GROUNDWATER CONSULTING LTD. - British Columbiaa100.gov.bc.ca/appsdata/acat/documents/r7785/r_OK... · LO2405 - Proof of Water - Page 3 4.0 CLOSURE Please find attached a detailed

KALA GROUNDWATER CONSULTING LTD. - #3 - 3 107A - 3 1 st Avenue #207 - 220 4th Avenue

Vernon, B.C. - V1T 2G9 Kamloops, B.C. - V2C 3N6 Tel(250) 54.5-1720 Tel (250) 372-9194

Fax (250) 545-1720 Fax (250) 372-9398 kalapac @direct.ca

Date: July 30,2002 Our Ref.: 02405

V1E 1W3

Attn:

Re: WATER WELL EVALUATION LOT 1, PLAN KAP 66946, DL 3848, ODYD VERNON, BC

1 .O INTRODUCTION

In accordance with your request Kala Groundwater Consulting Ltd. (Kala) has completed a domestic water well evaluation within the above legal property description.

The investigation included the review of available information including topographic map, driller’s report, pumptest data and an inventory of existing water wells. Kala’s investigation has been completed in compliance with instructions from the Regional District of North Okanagan, Subdivision Servicing By-Law No 726, 1986.

2.0 SITE DESCRIPTION

The property is located just off Jackpine Road approximately 9 km north east of Vernon, BC. The property is bounded by Abbott Creek to the east and the Kedleston Creek to the west. Figures 1 and 2 provide site location and well location plans.

The existing 150 mm diameter by 159.1 m deep well was constructed in October 2001 by Schibli Drilling of Lumby, BC. The well was constructed with a 4” 160 P.S.I. PVC liner from 9.1 m to 159.1 m and is located at the south end of the property.

(5 12 9

The next closest well is a rock well located approximately 100 m northwest of the property. The well is 3 (40° 12 1.92 m deep, and reported to be approximately 3 years old.

KALA GROUNDWATER CONSULTlNG LTD. CONFIDENTIAL

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Alan Kohut

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LO2405 - Proof of Water 07130102

Page 2

1

2

3.0 PROOF OF WATER

Site Location Information Well hiformation

Moore’s Well & Pump Service Ltd. of Vernon, BC, undertook a 360-minute constant rate yield test on the existing well and collected groundwater samples. Samples were submitted to Car0 Environmental Services, of Kelowna, BC, for analysis. The following tables of findings are attached for reference.

A copy of the driller’s log, pump test data, certificates of groundwater quality analysis and comparative criteria are shown within the Appendix. Based on the limited office assessment undertaken by Kala using the data provided by Moore’s Well & Pump Service Ltd., the following conclusions and recommendations are provided for the use of the Regional District of North Okanagan and the client:

a) The existing well located on Lot 1, just off Jackpine Road, is capable of a sustainable well yield of 6,546.37 L/day (1,400 IGPD).

b) The groundwater samples (total & fecal coliforms) from the well met the criteria outline in the Summary of Guidelines for Canadian Drinking Water Quality - March 2001 maximum allowable concentrations.

KALA GROUNDWATER CONSULTING LTD.

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Alan Kohut

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LO2405 - Proof of Water -

Page 3

4.0 CLOSURE

Please find attached a detailed description of the terms, limitations and constraints applicable to Kala involvement within this project and the uses of this report.

If there are any questions or concerns regarding this letter please contact Paul Blacken in Kamloops at your convenience.

Sincerely; Kala Groundwater -ulting Ltd.

Paul Black&, A . M . Environmental Technologist

Reviewed by: KaIa Groundwater Consulting Ltd.

Per: Larry C. Topp, P.Geo. Hydrogeologist


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LIMITATIONS AND CONSTRAINTS

Standard of Care

This report has been prepared in accordance with generally accepted hydrogeological and environmental practices. Where possible and applicable Kala has referenced and undertaken authorized commissions in accordance with governing regulatory guidelines. No other warranty, expressed or implied, is made.

Reporting

This report has been prepared for the specific site, design objective, development and purpose that was described to Kala Groundwater Consulting Ltd. (Kala) by the client and summarized in this document. The applicability and reliability of any of the findings, recommendations, suggestions, or opinions expressed in the report are only valid to the extent that there has been no material alteration to or variation from any of the said descriptions provided to Kala, unless Kala was specifically requested by the Client to review and revise the report in light of such alteration or variation.

Preliminary Site Investigations

Reporting is confidential intended to provide the client with a baseline assessment of environmental conditions within and immediately adjacent to the subject property. Reporting is based on data, information and materials collected during the performance of a PSI. A PSI is based solely on site conditions of the subject property during the time of site visits as described in this report. In evaluating a particular property Kala relies in good faith on historical information provided by individuals and agencies noted within the report. Kala does not warranty any property, explicitly or implicitly. Although every effort is made to verify the authenticity of pertinent information, Kala assumes no responsibility for any deficiency, misstatement or inaccuracy contained within a report as a result of omissions, misrepresentation or fraudulent acts of the individuals or parties interviewed.

Groundwater Potential Evaluations and Proof of Water

Reports are prepared in accordance with generally accepted hydrological practices for the Owner/Client, and their authorized agents. No warranty expressed or implied is made. The applicability of this report is only valid to the extent that there has been no material alteration fiom any of the said descriptions provided to Kala, unless Kala is specifically requested by the client to review and revise this report in light of such alterations. Groundwater potential evaluations are based on a thorough review of maps, databases and published documents available at the time of the assessment, and a site reconnaissance. The conclusions provided by Kala do not preclude the existence of other aquifers. A properly supervised groundwater supply investigation is required to verify the presence or absence of suspected aquifers. If additional information or assessment findings arise which may alter the conclusions and/or recommendations of this report Kala would be pleased to review and append our report where required. Proof of water assessments are based on pumping test information provided by others and interpreted by Kala unless otherwise noted. Groundwater sourced fiom fiactured bedrock aquifers is dependant on the density and aperture of randomly and structurally oriented fractures and joints. Kala can not warranty the long term viability of domestic water wells completed within fiactured bedrock.


LIMITATIONS AND CONSTMNTS

~-

Use of the Report

The information and opinions expressed in this report are for the sole benefit of the Client. No other party may use or rely upon this report or any portion thereof without Kala’s express consent. Kala will consent to any reasonable request by the client to approve the use of this report by other parties as approved users. The ownership and copyright of this report remain the property of Kala, who authorizes only the client and approved users to make copies of the report, and only in such quantities as are reasonably necessary for the use of the report by those parties. The client and approved users may not give, lend, sell or otherwise make available the report or any portion thereof, or any copy of the report or portion thereof, to any other party without the express written permission of Kala.

Third Party Use of Kala Reports

The information provided within this report is for the exclusive use of the client/owner and their authorized agents. Third party use of this report or any reliance or decisions made on the subject information herein, is at the sole risk of the third party. Kala has no obligation, contractual or otherwise to any third persons or parties, using or relying on this information for any reason and therefore accepts no responsibility for damages incurred by a third party as a result of actions taken or decisions made on the basis of the subject information.

Complete Report

The report is of a summary nature and is not intended to stand alone without reference to the instructions given to Kala by the Client, communications between Kala and the Client, and to any other reports prepared by Kala for the Client relative to the specific site described in the report. In order to properly understand the suggestions, recommendations, and opinions expressed in the report, reference must be made to the whole of the report. Kala cannot be responsible for use by any party of portions of the report without reference to the whole report.

Interpretation of the Report

(a) Nature and Exactness of Soil Description: Classification and identification of soils, rocks and geologic units have been based upon commonly accepted methods employed in professional geotechnical practice. This report contains descriptions of the systems and methods used. Where deviations from these systems have been used they are specifically mentioned. Classification and identification of the type and condition of soils, rocks and geologic units are judgmental in nature. Accordingly, Kala cannot warrant or guarantee the exactness of the description of insitu ground conditions set forth in the Report.

(b) Logs of Test Holes, Pits, Trenches etc.: The test hole logs are a record of information obtained from field observations and laboratory testing of selected samples as well as an interpretation of the likely subsurface stratigraphy at the test hole sites. In some instances normal sampling procedures do not recover a complete sample. Soil, rock or geologic zones have been interpreted fiom the available data. The change fiom one zone to another, indicated on the logs as a distinct line, may be transitional. The same limitations apply to test pit and other logs.


LIMITATIONS AND CONSTRAINTS

(c) Stratigraphic and Geologic Sections: The stratigraphc and geologic sections indicated on drawings contained in this report are interpreted from logs of test holes, test pits or other available information. Stratigraphy is inferred only at the locations of the test holes or pits to the extent indicated by items (a) and (b) above. The actual geology and stratigraphy, particularly between these locations, may vary considerably from that shown on the drawings. Since natural variations in geologic conditions are inherent and a function of the historic site environment, Kala does not represent or warrant that the conditions illustrated are exact and the user of the report should recognize that variations may exist.

(d) Groundwater Conditions: Groundwater conditions shown on logs of test holes and test pits, and/or given within the text of this report, record the observed conditions at the time of their measurement. Groundwater conditions may vary between test hole and test pit locations and can be affected by annual, seasonal and special meteorological conditions, or by tidal conditions for sites near the seas. Groundwater conditions can also be altered by construction activity. These types of variation need to be considered in design and construction.

Samples

Kala normally disposes of all unused soil, rock, and sediment or bulk water samples after 90 days of completing the testing program for which the samples were obtained. Further storage or transfer of samples can be made at the owner's expense upon written request.


Alan Kohut

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I I Total Available Drawdown 1-1- A n\ 85.11 m

None (only tested for colifoms)

SGCDWQ-2001-Summary of Guidelines for Canadian Water Quality - March 2001

8oftWap - 02405 - Site Location Diagram - Figure 1

P-

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XALA GROUND WA ER CONSULTING L TD. - VERNON KAMLOOPS

207 - 220 4th AVENUE TEL. (250) 372-91 94

only. Locations and configurations are approximate only.

KAMLOOPS, BC, V2C 3N5 FAX (250) 372-9398

Notes: Thk diagram is for conceptual purposes Drawnlby: PJF

Date: July 2002 ~://wiapwwv.gov. bc.ca/wat/waterbot/gwell-out.hRml Approved by:

Client:

Project Description: Proof of Water Vernon, B.C.

Dlagram: Well Location Diagram

Scale: As Shown Ref: 02405 File Ref: SL well.ppt Fig: 2

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APPENDIX

Driller’s Log Definition of Terms

Pump Test Data Analytical Chemistry Results

Comparative Criteria

Alan Kohut

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BCS Pm 623Y-l Environment Water Management Division

>

BRITISH COLUMBIA W A T E R W E L L R E C O R D Dote 14 I '.A01 /,!./I

De scr ip l ive ~ o c at i o n /ALrB(k&In/-Fn/7.Q f Fkc f L ! L , ! 5 3 3 A I. T Y P E 1 &New W e l l 2 0 Recondit ioned 9. CASING: 1 &"steel 2 UGalvonized 3 OWood

hi V. pF 17 /1/ 0.k

OF WORK 3 0 Deepened 4 0 Abandoned ~ ~ l ~ ~ i ~ l ~ 4 U P l a s t i c 5 OConcre te

1 0 C ble tool 2 (7 Bored 3 0 Jetted 2 - W o R K 4 d o t o r y a O m u d b d r C Ureve rse

3. WATER 1 6 m e s t i c 2 0 Municipal 3 0 l r r i go l i an

4. D R I L L I N G A D D I T I V E S

5. M E A S U R E M E N T S from 1 d o u n d l e v e l 2 U top01 casing casing height above ground level n

0 Other

WELL uSE4 0 Comm.8Ind 0 Other-

__

Pilless untt-.---ft I U above 2 E1 below ground level

1 d e l d e d 2 UCemented 3 OThreoded I t m e w 2 OUsed * Perforot ions

S h o e h ) v F < Open hole: from to c 7 7 I t D i o m e t e r X ins

IO. SCREEN: 1 ONominal [Telescope) 2 G P i p e Sire

Type 1 UContinuous Slot 2 0Per fo ra ted 3 U L o u v r e

Mo te r ia l l U Stainless Steel 2 0 Plastic Omher- Set from--. _-to---ft below ground level

n Other _____

F i t t i ngs , ~ O P ~ - ~ _ _ _ bottom--..-

Grovel Pack _ _ _

I I. DEVELOPED BY: 1 U s u r g i n g 2 O J e t t i n g 3 h l r

4 G B a i l i n g 5 U P u m p i n g U Other

colour- __ smell ; gas 1 O w 2 e300 15. W A T E R ANALYSIS: 1 H a r d n e s s L . - l - l . I r n g ~ L . - ___-

2 Iron[ .I -1-1 mgiL 3 Chloride[-I_ ] . . A d mg L

4 PH 1 _ _ 1 1 - . 1 Field Dote LI-l-._L~_I Address

8 . W E L L L O C A T I O N S K E T C H

V J F Z C O Member, 8 C W W D A 4 Uno ; ~ _ _ _ _ _ _

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Aquifer:

Aquiclude:

Aquitard:

Artesian well:

Available Drawdown:

Drawdown (S):

Flowing artesian well:

Permeability:

Production Well (PW):

Pumping Rate (Q):

20 year Pumping Rate (QtJ:

Residual Drawdown:

Specific Capacity (Qls):

Static Water Level:

Storativity:

Testwell 0: Till:

Transmissivity:

Water table:

Well Yield:

Definitions of terms

A mass of material containing wafer which can be removed by means of wells.

A geologic formation, group of formations or part of a formation through which virtually no water moves

A saturated, but poorly permeable bed, formation, or group of formations that does not yield water freely to a well or spring. However an aquitard may transmit appreciable water to or from adjacent aquifers.

A well which the water rises above the top to the aquifer in which i t occurs.

A volume of water measured from static water level to top of riser above screens.

The distance between the static water level and the surface of the cone of depression

A well in which the water overtlows at ground surface.

A measure of the ability of a material to permit the passage of water. Gravel has high permeability; clay has a very low permeability.

Well producing water forconsumption.

Constant or step pumping rate; typically in Us. or USgpm

Maximum recommended pumping rate based on well equilibrium estimations

The difference between the non-pumping water level and the level at a given time (1) after the pumping was stopped.

Well discharge expressed as rate of yield per unit of drawdown ( ie: USgpdft, Vdm).

The level of water in a well that is not being affected by withdrawal of groundwater.

The volume of water that the aquifn releases from storage per unit surface area of aquifer per unit loss in the component of hydraulic head normal to that surface.

Well used for exploratory purposes to determine if a water bearing zone is present

Compact mixture of clay, sand and stones often called hardpan OT boulder clay. Till is deposited by glacien.

The rate at which water is transmitted through a unit width of aquifer under a unit hydraulic mdient; generally expressed in mVsec.

Level below which rock, gravel or other material is saturated.

The volume of water discharged from a well in gallons per minute or cubic meten per day.

r

lrnpa-viovr m u m

Confined Aquifer

lmpaYiouI suatum

Unconfined Aquifer

Kala Groundwater Consulting Ltd. Pumping Test Data Report

29 367 107.06 33.68

30 369 105.45 32.07

31 37 1 103.92 30.54

32 373 102.40 29.02

- ~ _

___ ~ ~ _ _ _ ~ _ _ - _ _ - --__

- _ _ ~ - .- - - _.__ -

207-220 4th Avenue

{amloops, British Columbia

3h: 250-372-91 94 Fax: 250-372-9398

____ , Project: 6 Hour Yield Test

_________ No:

Client: Page 1

lata observed at: New well Pumping test: 6 Hour Yield Test

Iistance from PW: 0 [m] Pumping well: New well

% ) e p t m x 7 3 . 3 8 m Screen radius:

-0cation: Vernon. BC Screen length:

rest performed by: Moore s I Casing radius:

late: 0611 812002 Aquifer thickness: 32.6 [m]

-___

_ _

, -~

I

Time [min] Depth to WL [m] Drawdown [m]

1 0 73.38 0.00

2 1 74.50 1.12

3 2 75.59 2.21

4 4 76.50 3.12

5 6 78.85 5.47 -__ - . - ____________-

6 8 79.97 6.59

7 10 81.03 7.65

8 15 83.31 9.93

9 20 85.27 1 1.89

10 30 89.08 15.70

11 40 92.06 18.68 .- -

12 50 94.69 21.31

13 60 97.04 23.66

14 90 102.62 29.24

15 120 105.48 32.10

16 150 107.38 34.00

17 180 110.03 36.65

18 210 112.53 39.15

-____ .~ _____.__

~ _ _ _ __-

~ __ __ . .. ~ ___

19 240 113.71 40.33

20 270 114.80 41.42

21 300 115.64 42.26

22 330 116.43 43.05 ______

23 ( 360 117.29 43.91

24 361 115.55 42.17 __ __

25 362 112.75 39.31

26 363 111.15 37.77

27 364 110.00 36.62

28 365 108.77 35.39 -

33 375 101.02 27.64

34 377 99.93 76 55

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Kala Groundwater Consulting Ltd. 207-220 4th Avenue

Kamloops, British Columbia No: 02405

Ph: 250-372-91 94 Fax: 250-372-9398 Client: Page 2

Pumping Test Data Report

Project: - 6 Hour Yield Test _. . . .

~

Data observed at: New well Pumping test: 6 Hour Yield Test

Distance from PW: 0 [m] Pumping well: New well

D e p t h to static WL: 73.38 m Screen radius: ~~ I Location: Vernon. BC Screen length:

I Test performed by: Moore s Casing radius:

Date: 0611 812002 Aquifer thickness: 32.6 [m]

Time [min] ~ Depth to WL [m] Drawdown [m] ~

98.72 25.34 35 379

36 381 j 97.56 24.18 I ~

39 390 92.75 19.37

40 395 90.37 16.99

41 400 I 88.32 14.94

42 405 86.47 13.09

43 410 85.09 11.71

44 41 5 84.18 10.80

45 420 83.12 9.74

____

_ _ __ ~ ___

1410 74.52 1.14 I 46

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I Kala Groundwater Consulting Ltd. Pumping Test Analysis Report

207-220 4th Avenue

Kamloops, British Columbia

Project: 6 Hour Yield Test -I No: 02405 -I I Ph: 250-372-9194 Fax: 250-372-9398

- - Client:

I 6 Hour Yield Test (Bawdow n vs. Tim w ith Discharge) I Tim [nin]

0 282 564 846 1128 1410 Discharge + New well

6 Hour Yield Test

Drawdown vs. Time with Discharge I Test

Analvsis method:

Analvsis results:

I

Test parameters: Pumping well: New well Aquifer thickness: 32.6 [m]

Screen radius: 0 [ml

Screen length: 0 [ml

Casing radius: 0 [ml

Discharge rate: 0.2524 [I/s]

Comments:

Evaluated by: M8 n - A - . nC I. n,"nn_

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Kala Groundwater Consulting Ltd. Pumping Test Analysis Report

207-220 4th Avenue

Kamloops, British Columbia

Ph: 250-372-91 94 Fax: 250-372-9398

Project: - 6 Hour Yield Test

No: 02405

I Client:

6 Hour Yield Test (Cooper-Jacob Tm-Drawdow n)

1 Tim [ i n ]

10 100 I ,ooo New well

T L

C

Test name:

Analvsis method: CooperJacob Time-Drawdown

6 Hour Yield Test

Analvsis results: Transmissivity: 2.22E-1 [mz/d] Conductivity: 6.81 E-3 [m/d]

Test Darameters: Pumping well: New well Aquifer thickness: 32.6 [m]

Screen radius: 0 [ml Confined aquifer




Comments:

Evaluated by: MB

n=.ip. nfiiroimn7

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Kala Groundwater Consulting Ltd. Pumping Test Analysis Report

- ~~~

207-220 4th Avenue


Project: 6 Hour Yield Test -

Client: --I Ph: 250-372-91 94 Fax: 250-372-9398

1

6 Hour Yield Test (Cooper-Jacob Tim-Draw dow n)

Tme [min] 10 100

Test name:

Analvsis method: CooperJacob Time-Drawdown

6 Hour Yield Test

1 Analvsis results: Transmissivity: 6.40E-1 [m2/d] Conductivity: 1.96E-2 [mld] I Test Darameters: Pumping well: New well Aquifer thickness: 32.6 [m]

Screen radius: 0 [ml Unconfined aquifer



Discharge rate: 0.2524 [Vs]

Comments:

Evaluated by: MB .-._I_

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Kamloops. British Columbia No: 02405

Ph: 250-372-91 94 Fax: 250-372-9398 Client:

Pumping Test Analysis Report

Project: 6 Hour Yield Test .___

-

__.~__ _ _

6 Hour Yield Test (Neuman)

1 IU 1E-1 1 E O 1 E l 1E2 1 B 3 1B4 1E5 1E6 1E7

VI - 3

m New well

Test name:

Analvsis method: Neuman

6 Hour Yield Test

Analvsis results: Transmissivity: 2.1 7E-1 [m*/d] Conductivity: 6.65E-3 [m/d]


Screen radius: 0 tml Beta: 0.005


Casing radius: 0 tml


LOG( SylS): 4

Comments:

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Kamloops, British Columbia No:

Ph: 250-372-91 94 Fax: 250-372-9398 Client:


Project: -___.

6 Hour Yield Test -- ~~~ ~.

~~~~~ _ _ ~ ~ _ _ ~

6 Hour Yield Test (Theis Recovery)

Ut' 10 100 New well

\ I I

Test name:

Analvsis method: Theis Recovery

6 Hour Yield Test

Analvsis results: Transmissivity: 1.96E-1 [m2/d] Conductivity: 6.02E-3 [m/d]


Screen radius: 0 [ml Confined aquifer



Discharge rate: 0.2524 [Vs]

Pump Time 360 [min]

Comments:

Evaluated by: MB

- . - - . . - .- - . -

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Ph: 250-372-91 94 Fax: 250-372-9398 Client:


Project: ---_____

- 6 Hour Yield Test ~~

- ~ _ ~ ~ _ _ _ _

I I

6 Hour Yield Test (Theis Recovery)

T Y

In

Test name:

Analvsis method: Theis Recovery

6 Hour Yield Test

Analvsis results: Transmissivity: 5.74E-1 [m*/d] Conductivity: 1.76E-2 [m/d]


Screen radius: 0 [ml Unconfined aquifer




Pump Time 360 [min]

Comments:

Evaluated by: MB

natw nfiii Q I X U ~

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CERTIFICATE OF ANALYSIS

,June 6, 2002

Moore's Well R Pump Service 853 E? Fairweather Place VERNON, BC vi-r 8-ro

Attention: Garry Moore

Sample ID: Jackpine Road

Sanipling date: .June 3/02 Received date: ,June 4/02

Analysis Results

Total Coliform 0 coloniesll OOmL

Fecal Coliform 0 coloniesM OOmL

Interpretation of Results: According to Canadian Drinking Water Guidelines the maximum acceptable concentration for both total or fecal coliforms is 0 Colonies/lOOml_. (When Heterotrophic Plate Count is tested, there should be fewer than I 0 0 col/mL) If any coliforms are detected, or if it is noted that there arc? more than 3110 backgrmind colonies per IOOrnL, or if there are more than 100 HPC per mL, the site should be resampled and/or remediation should be undertaken.

Certified by' CAR0 Environmental Services

Jbnice M. Fraser, B.Sc Lab Manager

FAX (250)549-3814

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Summary of Guidelines for Canadian

. . . . . . . - . . .

Drinking Water Quality

Prepared by the Federal-Provincial Subcommittee on Drinking Water

of the Federal-Provincial-Territorial Committee on Environmental and Occupational Health

March 2001 .-.

Membership of the Federal-Provincial Subcommittee on Drinkjng Water and Secretariat

Provincial and Territorial Represenlaiiva

Alberta British Columbia Manitoba New Bmswick Newfoundland Northwest Territories Nova Scotia Nunavut Territory Ontario Prince Edward Island Quibec Saskatchewan Yukon Temtory

Federal Representaha

Health Canada Environment Canada

Liaison Officers

Dr. Jim Popplow Mr. T i Macaulay

Ministry of Environmental Protection Ministq of Health and Ministry Responsiile for Seniors Department of Conservation Department of Health and Wehess Department of Environment and Labour Department of Health and Social Services Department of the Environment and Labour Department of Health and Social Services Ministry of Environment Department of Fisheries, Aquaculture &d Environment Ministire de I'Environnement Department of the Environment and Resource Managemeat Department of Health and Social Services

Mr.Karuchinniah Mr. Bob Smith Mr. Don Rocan

Mr. Neil Thomas Mr. Martin Goebel

Mr. Duane Fleming Mr. David Brig,$ns

blr. Bruce Trotter Mr. Gof? Jenkins

Mr. George Somea Ms. Hiltne Trenblay

Mr. Thon Phommavong Ms. Patricia Brooks

Ms. Michile Giddings Ms. Connie Gaudet

Federal-Provincial-Temtonal Committee on Environmental and Occupational Health Canadian Advisory Council on Plumbing

Subcommittee Secretary

, Health Canada (Drinking Water Section, Safe Environments Programme, Healthy Environments and Consumer Safety Branch) Mr. David Green

ne March 2001 edition of the "Summary of Guidelines for Canadian Drinking Wata Quality" SUPCX& an p~v ions V C ~ ~ ~ O U S ,

hcIuding that contained in the 1996 SixthEdition of the Guidelinesjor Crmadiun W n g Water @a&.

1

Safe Environments Programme Health CaMda

Protozoa Numerical guidelines for the protozoa Giardia and Cryprospondurn are not proposed at this time. Routine

metho& available for the detection of protozoan cysts and oocysts suffer from low recoveq rates and do not provide my information on their viability or human infectivity. Nevertheless, until better monitoring data and infomation on the viabgity and infectivity of cysts and oocysts present in drinking water are available, measures to reduce the risk of suspected to be present in source waters or if Giardia or Cryptosporidium has been responsible for past waterborne

- .outbreaks in a community, a treatment regime and a watershed or wellhead protection plan (where feasible) or other measures known to reduce the risk of illness should be implemented.

~ m a r y of Guidelines for Canadian Drinking Water h l i v (03101) Federal-Provincial Subcommiitee on Drinking Water

as much as possible should be implemented. If viable, human-infectious cysts or oocysts are present or

. . . . . . -

Viruses (Under Review)

human enteric viruses, many of which are non-cultuxable. Testing is complicated, expensive, not available for all viruses, and beyond the capabilities of most laboratories involved in routine water quality monitoring. n e bed means of safeguarding against the presence of human enteric viyses are based upon the application of adequate treatment and the absence of faecal indicator organisms, such as Escherichia coli.

Boil Water Advisories

a rolling boil for 1 minute is considered adequate.

Numerical guidelines for human enteric viruses are not proposed at this time. There are more than 120 types of

. .

General guidance on the issuing and rescinding of boil water advisories is provided. In the event of an advisory,

Summary of Guidelines for Chemical and Physical Parameters

Parameters with Guidelines Guidelines for all chemical and physical parameters, including al l new, revised and r e e m e d &urn

acceptable concmtxations (MAG), interim maximum acceptable concentntions (LMACs) and aesthetic objectives (AOs), are listed in Table 2. For more information on the drinking water guide'he for any particuiar compound, please refer to the latest edition ofthe Guidelinesfor Canadian Drinking Water Qua& cr to the supporting Documentation for the parameter of concern.

Table 2 Summary of Guidelines for Chemical and Physical Parameters

MAC I h U C A 0 Parameter bo&) (ma&) ( J w s ) aldicarb 0.009 aldrin f dieldrin 0.0007 aluminum1 antimony 0.006 2 arsenic 0.025 atrazine + metabolites = 0.005 azinphos-methyl - 0.02 - barium 1 .o bendiocarb 0.04 benzene 0.005 benzo[a]p yrene 0.00001

' boron 5 bromate 0.01 bromo+ ' 0.005 cadmium 0.005

3

Safe Environmentr Programme Health Canada

' S~mmary of Guidelinesfor Canadian Drinking Wuter Qualip (03/0]) Federal-provincial Subcommittee on Drinking wafer

A 0 PrMC M A C

Parameter (mgn) (mgn) (m@) selenium 0.01 simazine 0.01

sodium 9 a00 sulphate 10 5500

_. . . . . - - .sulphide ( a ~ H2S) - 50.05 taste Inoffensive temperature 515°C terbufos 0.001 tetrachloroethylene 0.03

tekachlorophenol, 2,3,4,6- 0.1 s o . O O l toluene 9.024 total dissolved solids ("DS) GOO

t r i c h l o ~ p h ~ d , 2,4,6- 0.005 lo.002

trihalomethanes (total) 11 0.1

tricldoroethylene 0.05

trifluralin 0.045

turbidity 1 m 1 2 25 NTU 9 1 3 urani\rm 0.02 vinyl chloride 0.002

..

~-

xylenes (total) 50.3 zinc 2 55.0

Notes: 1. A health-baed guideline for aluminum in drinking water har, not be= established. Howrrer, water mknent p la t s using

aluminum-based coagulants should optimize their operations to rcducc residual aluminum Ieve!s in m t c d water to the lowest extent possible as a precautionary memm. Operationu[ guidance .ia[ue~ of less than 100 pg/L total aluminum for conventiod txeatment plants and less than 200 pg'L total aluminum for 0th~: types of matmcnt SY*ZIS arc rmmmended Any atteapt to minimim duminum residuals must not compromise the effcc~~c~ess of disinfection processes or inter;'erc with &e re;novai of disinfection by-product ~ECUSOK.

2. Becanse 6rstdrawn wate: may contain higher concentrations of me*& than found in running warn after flushing, fauces should be thorou@y flushed before water is taken for consumption or analysis.

3. TCU = true colour unit 4. In cases where total dichlorobenzenes are m e m d and concmations cc:ce:d the most stringeat value (0.005 mgl) , the

conctnmtiom of the individual isomers should be established 5. It is rccouuncuded, however, that the concenmtion of fluoride be adjusted to 0.8-1.0 a&, which is the optimum range for the

control of dentai caries. 6. Equivalent to 10 mgL as n i ~ k ~ g e n . Whm nitrate and nihitc an d e d e d separately, levcls of ni&ite should not exceed

3 2 m& 7. Eqyivalent to 0.007 mg& for paraquat ion

9. It is rrcommcnded ht-sodinm be included in routine monitoring progmmes, as levels may be of inmest to anthonties who wish to prrscnbe sodium-rcstticted diets for their patients.

10. T h e n may be a laxative effect in some iudividds when dpbatc lcrc!s exceed 500 m& ' 11. The IMAC for trihalomcthanes is expressed as a NMing annual avenge. IC is based on the &k associated with chlomfonn, h e

trihalomethanc most often pment and in greatest concentdon m drinking water. The guideline is designated as interim until such time as the risks h m other disinfeaion by-prodocts an asctrtained. The preferred method of ControIling di<~cctionby-pdwts is precursor remod, however, any method of control employed must not compromise the effccdvmess of water disinfection.

12. KN = nephelometric turbidity unit. 13. At the point of consumption

a. ~onn i ts .

5

Sde Environments Programme Health Canado

S U ~ ~ V of Guidelinesfor Canadian Driding Water Quati9 (0301) Federal-Provincial Subcommittee on Drinking Water

To facilitate the monitoring of radionuclides in drinking water, the reference level of dose is expressed as an activity concentration, which can be derived for each radionuclide from published radiological data n e National Radiological Protection Board has calculated dose conversion factors @CFs) for radionuclides based on metabolic and dosimetric models for adults and children. Each DCF provides an estimate of the'50-year committed effective dose resulting from a single intake of 1 Bq* of a given radionuclide.

of 2 L, O r 730 Vyear, and a maximum committed effective dose of 0.1 mSv, or 10% of the International Commission on Radiological Protection limit on public exposure:

The ~ C S of radionuclides in public water supplies are derived from adult DCFs, assuming a daily water intake

..- . . . . - _ . .

1 x 104 (Svlyear)

730 Mear) x DCF (Sv/Bq) MAC @@) =

When two or more radionuclides are found in drinking water, the following relationship should be satkfjed:

where ci and MACi are the obswved and maximum acceptable concentrations, respectively, for each contriiuting radionuclide.

MACs for radionuclides that should be monitored in water samples are listed in Table 4. If a sample is analysed by gamma-spectroscopy, additional screening for iadionuclides that may be present under certain conditions can be performed. MACs for these radionuciides are given in Table 5 . MACs for a number of additional radionuclides, both natural and artificial, can be found in the sixth edition of the guidelines booklet.

Water samples may be initially screened for radioactivity using techniques for gross alpha and gross beta activity determinations. Compliance with the guidelines may be inferred if the measuremeats for gross alpha and gross beta activity are less than 0.1 BqL and 1 BqL, respectively, as these are lower than the strictest MCs. Sampling and analyses should be carried out oftea enough to acmately characterize the annuai exposure. If the source of the activity is known, or expected, to be chan-eig rapidly with time, then the sampling frequency should reflect this factor. If there is no reason to suppose that the some varies with time, then the sampling may be done annually. If measured concentrations are consistent and well below the reference levels, this would be an argument for reducing the sampling frequency. On the other hand, the sampling frequency should be maintained, or evea increased, if concentrations are approaching the reference levels. In such a case, the specific radionuclides should. be identified and individual activity concentrations measurea

_-

-. .

Becquml (Bq) is the unit of activity of a radioactive substance, or the rate at which busformatiom cux in &e substance One ~ r c l is q y l to one tiansfonnation per second and is approximately e@ to 27 picocuries @Ci).

7

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KALA GROUNDWATER CONSULTING LTD. - British Columbiaa100.gov.bc.ca/appsdata/acat/documents/r7785/r_OK... · LO2405 - Proof of Water - Page 3 4.0 CLOSURE Please find attached a detailed