JOE RICH CREEK WATERSHED

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1 Water Quality Monitoring For the South Slopes of the JOE RICH CREEK WATERSHED (Year Data) Prepared for GORMAN BROS. LUMBER LTD. Westbank, BC by DOBSON ENGINEERING LTD. #4, 1960 Springfield Road Kelowna, BC V1Y 5V7 February, 2004

2 Water Quality Monitoring / Joe Rich Creek Watershed (Year ) i Table of Contents 1.0 INTRODUCTION PROJECT DESCRIPTION WATER QUALITY PARAMETERS SAMPLING METHODS/EQUIPMENT SAMPLING LOCATIONS SAMPLING DATES QUALITY ASSURANCE AND QUALITY CONTROL PRECIPITATION AND STREAM DISCHARGE LABORATORY ANALYSIS RESULTS TURBIDITY SUSPENDED SOLIDS FOREST DEVELOPMENT PAST FOREST DEVELOPMENT PROPOSED FOREST DEVELOPMENT CONCLUSIONS RECOMMENDATIONS File: Project: Date: February 2004 DOBSON ENGINEERING LTD.

3 Water Quality Monitoring / Joe Rich Creek Watershed (Year ) ii Tables Table 1 Sampling Site Locations and EMS Identification Numbers Table 2 Sampling Dates and Parameters Analyzed Table 3 Turbidity Values Clear Flow Vs Turbid Flow ( ) Table 4 Suspended Solids Values Clear Flow Vs Turbid Flow ( ) Table 5 Proposed Forest Development File: Project: Date: February 2004 DOBSON ENGINEERING LTD.

4 Water Quality Monitoring / Joe Rich Creek Watershed (Year ) iii APPENDICES APPENDIX A Water Quality Monitoring Sites Location Map APPENDIX B Lab Analysis Data Tables 1-3 APPENDIX C Precipitation and Stream Discharge Data File: Project: Date: February 2004 DOBSON ENGINEERING LTD.

5 GORMAN BROS. LUMBER LTD. Westbank, BC Water Quality Monitoring for the South Slopes of the JOE RICH CREEK WATERSHED (Year Data) 1.0 INTRODUCTION This report discusses the water quality assessment for Leech, Schram and Bailey Creeks, which are situated on the south slopes of the Joe Rich Creek watershed. The Joe Rich Watershed Monitoring Group has expressed concerns about the proposed forest development by Gorman Bros. Lumber Ltd. in this area and the potential impacts the development may have on water quality. The purpose of this program is to determine if forest development is affecting water quality in the above named creeks by comparing water quality in basins with active development to water quality in those that do not. 2.0 PROJECT DESCRIPTION This project is designed as a paired watershed study using Leech Creek as a control, and Schram Creek and Bailey Creeks as treatment basins (Refer to Appendix A, Location Map). Leech Creek was to remain undeveloped, however, forest health issues resulted in the harvest of a small patch cut area in upper Leech Creek (Polygon CP 401, FL A18671 ~ 10 ha). This development is not intensive, and this basin remains useful as a control for the study. There is currently no future development proposed in Leech Creek. The Schram Creek basin is currently undeveloped, allowing its use as a control basin as well, however there is future development proposed in Schram Creek. Proposed development is discussed in detail in Section 4.0. Water quality sampling has been conducted from to determine if forest development is affecting water quality (primarily sediment dynamics turbidity/suspended solids). Residents in the area (Stu and Anne Morrison) collected the water samples and delivered them to Caro Environmental Services for laboratory analyses. Gorman Bros. Lumber Ltd. has been operating in the area during the project period. File: Project: Date: February 2004 DOBSON ENGINEERING LTD.

6 Water Quality Monitoring / Joe Rich Creek Watershed (Year ) Water Quality Parameters Water samples were collected and analyzed for turbidity and suspended solids during each site visit. These two parameters can be impacted by forest development as a result of surface erosion from roads and landslides 1. During 2001, additional laboratory analyses were conducted for; alkalinity, calcium (total), chloride, color (true), dissolved solids (total), fluoride, hardness (total), iron (total), magnesium (total), manganese (total), nitrate, nitrite, ph, potassium (total), sodium (total), specific conductance, sulphate, uranium, total coliform and fecal coliform. These parameters are typically examined for new drinking water sources, therefore they are no longer measured in this study. Although these additional parameters are important with respect to drinking water quality, turbidity and suspended solids best identify changes in water quality that result from surface erosion. 2.2 Sampling Methods/Equipment Water sampling was conducted according to Resources Information Standards Committee (RISC) standards as described in the Ambient Freshwater and Effluent Sampling Manual (Water Quality Branch, 1994). Samples were collected in clean one-liter plastic bottles, placed in an insulated cooler and delivered to Caro Environmental Services for laboratory analysis. Dobson Engineering Ltd. staff collected the May 2003 samples, and demonstrated the sampling procedures to Stu and Anne Morrison, who collected the remaining 2003 samples and delivered them to the lab. Prior to 2003, both turbidity and suspended solids were analyzed on all sampling dates. On many occasions, when turbidity values were less than 5 NTU (primarily during the clear flow period) the corresponding suspended solids concentrations were below the detection limit. Therefore, suspended solids analyses were not conducted during the 2003 clear flow period unless the turbidity values were greater than 5 NTU. 1 MacDonald, L.H., A.W. Smart and R.C. Wissmar Monitoring Guidelines to Evaluate Effects of Forestry Activities on Streams in the Pacific Northwest and Alaska. File: Project: Date: February 2004 DOBSON ENGINEERING LTD.

7 Water Quality Monitoring / Joe Rich Creek Watershed (Year ) Sampling Locations The sampling site locations were chosen to provide water samples that are representative of the study basins. Access concerns were also addressed during site selection. Refer to Table 1 and the location map (Appendix A) for sampling site locations. TABLE 1 Sampling Site Locations and EMS* Identification Numbers Site Location Co-ordinates EMS I.D. Number Site #1 Leech Creek Site #2 Schram Creek Leech Creek near the boundary between private land and Crown land, approximately 10m upstream from the water well. Schram Creek immediately upstream from the boundary between private land and Crown land. 49 o 51' 42''N 119 o 09' 00''W 49 o 50' 57''N 119 o 07' 09''W E E Site #3 Bailey Creek Bailey Creek near the boundary between private land and Crown land, approximately 3m upstream from the Dump road crossing. 49 o 50' 25''N 119 o 06' 03''W * Environmental Monitoring System a provincial database for discrete sampling data. E Prior to July 20, 2001 water samples were collected at different locations than those described above. At Leech Creek, samples were collected approximately 2m downstream from the water well rather than 10m upstream from the well. At Schram Creek, samples were collected within private property rather than immediately upstream from the private property boundary, and at Bailey Creek, samples were collected downstream from the road crossing rather than 3m upstream from it. 2.4 Sampling Dates The greatest range in water quality variability typically occurs during the spring freshet period (April through June). Samples were collected weekly from May 9, 2003 to June 19, 2003 to characterize water quality during this time. Water quality variability is typically less outside of the spring freshet period, so samples were collected bi-weekly in July and August and monthly in September and October. Two additional samples were collected in October to measure water quality after rainstorm events. All three sites were visited on 16 occasions, however Leech Creek was dry on six site visits from August 14 through October 14, Refer to Table 2 for sample dates. File: Project: Date: February 2004 DOBSON ENGINEERING LTD.

8 Water Quality Monitoring / Joe Rich Creek Watershed (Year ) 4 TABLE 2 Sampling Dates and Parameters Analyzed (Including QA/QC Samples) Sampling Dates May 9, 2003 May 15, 2003 May 22, 2003 May 29, 2003 June 5, 2003 June 12, 2003 June 19, 2003 July 3, 2003 July 17, 2003 August 1, 2003* August 14, 2003* August 28, 2003* September 18, 2003* October 2, 2003* October 14, 2003* October 21, 2003 *Leech Creek was dry and not sampled on these dates. 2.5 Quality Assurance and Quality Control Parameters Analyzed Suspended Solids, Turbidity Suspended Solids, Turbidity Suspended Solids, Turbidity Suspended Solids, Turbidity Co-located Triplicates Suspended Solids, Turbidity Suspended Solids, Turbidity Suspended Solids, Turbidity Suspended Solids, Turbidity Suspended Solids, Turbidity Turbidity Turbidity Turbidity Turbidity Turbidity Turbidity Turbidity Water sampling was conducted according to Resources Information Standards Committee (RISC) standards as described in the Ambient Freshwater and Effluent Sampling Manual (Water Quality Branch, 1994). Most of the samples collected were delivered to the laboratory within 24 hours of collection and were maintained at or below 10 C. Triplicate samples were collected on one occasion to determine the precision of the laboratory analysis. The Ministry of Environment, Lands and Parks Guidelines for Interpreting Water Quality Data (1998) discuss the use of replicate samples as a check for laboratory precision. When triplicate samples are taken, precision is expressed as percent relative standard deviation. For triplicates, a percent relative standard deviation of 18% or less is considered acceptable precision. The triplicates collected in 2003 met the quality control criterion (Refer to Appendix B). The Guidelines for Interpreting Water Quality Data states that in order to use Relative % Standard Deviation as a precision check, the analytical values must be at least five times the Method Detection Limit (MDL). Because most of the water samples collected during the clear flow period have turbidity and suspended solids values less than 5 times the detection limit, replicate analyses were not conducted during this period. Water samples were sent to a registered laboratory (Caro Environmental Services) under the Environmental Data Quality Assurance (EDQA) program to ensure data accuracy. File: Project: Date: February 2004 DOBSON ENGINEERING LTD.

9 Water Quality Monitoring / Joe Rich Creek Watershed (Year ) Precipitation and Stream Discharge Intense rainfall, and rain-on-snow events in the spring, can result in rapid increases in surface run-off and streamflow. The increased surface run-off and increased stream flow can cause increased turbidity and increased suspended sediment concentrations. Environment Canada data indicates that in 2003, the Southern BC Mountains Region experienced the 6 th wettest spring on record since The summer of 2003 was the 4 th driest and 4 th hottest since 1948 and the fall of 2003 was the 11 th wettest on record. Spring and fall temperatures were near normal (Appendix C Precipitation and Stream Discharge Data). Water Survey of Canada data for Mission Creek indicates the maximum daily discharge for 2003 occurred on June 14, 2003 and was 33 m 3 /s. This equates to a 1-year peak flow event, and it is likely the three study streams experienced peak flows with similar magnitudes (discharge is not measured on the study streams). Flows of this magnitude alone are not likely to result in channel erosion or degraded water quality. The combination of below average summer precipitation and above average summer temperatures resulted in reduced stream flow. Schram and Bailey Creeks had very low flows during August and September and Leech Creek was dry during this time. Note: Local residents questioned why Leech Creek was dry while Schram and Bailey Creeks were not. Although several factors influenced these conditions, (hot, dry weather, vegetative cover in the upper watershed, local geology etc.) the key factor was likely the location of the sites. The Leech Creek site is located on the alluvial fan near the Joe Rich Creek floodplain, where surface water has a greater potential to flow subsurface. The other two sites are located upstream from the fans where the surface water has less potential to flow sub surface. 3.0 LABORATORY ANALYSIS RESULTS All water samples were sent to Caro Environmental Services for turbidity and suspended solids analyses. Results of laboratory analyses have been entered in Environmental Monitoring System (EMS) the provincial data base for water quality data. The following sections provide a summary of the laboratory analysis results and Tables 1 to 3 in Appendix B provide the detailed results. 3.1 Turbidity Turbidity is a measurement that describes the cloudiness of water. Suspended particles in water cause incoming light to scatter and give water a cloudy appearance. The suspended particles can include clay, silt, fine sand, decaying organics, algae, and other micro-organisms. In the context of domestic water, turbidity is important as suspended particles can impair the effectiveness of various disinfection processes and is File: Project: Date: February 2004 DOBSON ENGINEERING LTD.

10 Water Quality Monitoring / Joe Rich Creek Watershed (Year ) 6 aesthetically displeasing. In many BC interior streams, spring freshet and rain events bring with them sediment laden water, which cause peaks in turbidity levels. Health Canada s guideline for drinking water that does not receive treatment to remove turbidity is a maximum of 1 NTU (nephelometric turbidity units). The acceptable turbidity level for raw water that is chlorinated is 5 NTU if it can be demonstrated that disinfection is not compromised by the use of the less stringent value. In snowmelt dominated watersheds, turbidity tends to be higher during the spring freshet period mainly as a result of increased stream flows. In the Joe Rich Creek watershed the spring freshet, resulting from snowmelt in the upper elevations, typically occurs from April to June. Based on this information the turbidity data has been divided into two separate periods: clear flow period and turbid flow period. The turbid flow period coincides with spring freshet between April 1 to June 30 with the clear flow period occurring during the remainder of the year. In 2003, turbidity was sampled 16 times at Schram Creek and Bailey Creek and 10 times at Leech Creek. The turbidity data is arranged by flow period in Table 3. Year Table 3 Turbidity Values Clear Flow vs Turbid Flow ( ) # Of Samples Clear Flow Period (July 1 March 31) Range (NTU) Mean (NTU) # Of Samples Turbid Flow Period (April 1 June 30) Range (NTU) Mean (NTU) Site #1 Leech Creek Site #2 Schram Creek Site #3 Bailey Creek File: Project: Date: February 2004 DOBSON ENGINEERING LTD.

11 Water Quality Monitoring / Joe Rich Creek Watershed (Year ) 7 The majority of turbidity values at all three sites exceeded the 1 NTU guideline during the 2003 turbid flow period. The maximum turbidity at Schram and Bailey Creeks was recorded on May 9, The maximum turbidity value at Leech Creek (4.3 NTU) was recorded on May 22, 2002, however the turbidity on May 9 was 4.2 NTU, which is very close to the maximum value. There was a short duration, but intense rainstorm on the morning of May 9 th, which likely contributed to increased surface runoff and turbidity in the study streams. The occasions where turbidity did not exceed the guideline during the turbid flow period coincide with the transition period between the end of the turbid flow period and the beginning of the clear flow period. It is not uncommon for lower turbidity values during this transition period, especially during years with low peak flow events. None of the clear flow samples from Leech Creek or Bailey Creek exceeded the 1 NTU turbidity guideline, however turbidity at Schram Creek exceeded the guideline twice during the clear flow period (1.4 NTU on August 1, and 1.8 NTU on October 21). This occurred in previous years and is not considered unusual as these turbidity values are still considered low, and within the range of natural variability. The samples collected on October 21 were following a rain event and suggest the rain event had little effect on the turbidity. 3.2 Suspended Solids Suspended solids are reported as milligrams/litre (mg/l) and refer to the concentration of suspended solid material in the water. Suspended solids contribute directly to turbidity and can interfere with disinfection processes in drinking water, however there is no guideline for suspended solids in raw untreated drinking water. Suspended solids are measured by filtering the one liter water sample through a filter paper (of known mass). The paper is then dried and weighed and any increase in mass is due to the suspended solids in the water. The filter paper has a pore size of roughly two microns (2 microns = 2 millionths of a meter, or.002 mm). Particles smaller than this can pass through the paper and not be detected. Clay particles are less than 2 microns and may not be detected by the method used. Therefore it is possible that highly turbid water (resulting from suspended clay particles) could have very low measurable suspended solids values. Suspended solids were measured on the same dates as turbidity (excluding most of the clear flow period) and this data has also been separated into two flow periods. The suspended solids data is arranged by flow period in Table 4. File: Project: Date: February 2004 DOBSON ENGINEERING LTD.

12 Water Quality Monitoring / Joe Rich Creek Watershed (Year ) 8 Year Table 4 Suspended Solids Values Clear Flow vs Turbid Flow ( ) # Of Samples Clear Flow Period (July 1 March 31) Range (mg/l) % BDL* # Of Samples Turbid Flow Period (April 1 June 30) Range (mg/l) % BDL* Site #1 Leech Creek < % % All < % 6 < % < % 8 < % All < % 7 < % Site #2 Schram Creek < % % < % 6 < % All < % 8 < % All < % 7 All < % Site #3 Bailey Creek < % % All < % 6 < % All < % 3 < % All < % 7 All < % *% BDL = number of results Below Detection Limit (<1 mg/l), expressed as a percent of the data set. All but one of the suspended solids values was below detection limits. On June 19 th there was 2 mg/l suspended solids at Leech Creek with a corresponding turbidity value of 1.1 NTU. This is unusual because on one occasion the suspended solids were below the detection limit and turbidity was 4.3 NTU. It is possible the suspended solids on June 19 th resulted from coarse-grained material, (fine sand possibly) which readily settled out and was not detected by the turbidimeter. Each successive year since 2000 shows an increase in %BDL during the turbid flow period at all three sites, which may indicate reduced surface erosion/sediment supply in the upper watershed. Suspended solids values do not correlate with low level turbidity values (<5 NTU). A correlation between suspended solids and turbidity does appear to exist when turbidity values are greater than 5 NTU. 4.0 FOREST DEVELOPMENT Gorman Bros. Lumber Ltd. is the forest licensee operating in the study area. Recent activity includes development of polygon 1966 (CP 401, FL A18671 ~ 10 ha), located in the Leech Creek sub-basin and polygon 1988 (CP405, FL A18671 ~ 8.9 ha net patch cut, 32 ha gross area), located in the Bailey Creek sub-basin. There has been no recent development in the Schram Creek sub-basin. Future forest development is proposed in the study area. File: Project: Date: February 2004 DOBSON ENGINEERING LTD.

13 Water Quality Monitoring / Joe Rich Creek Watershed (Year ) Past Forest Development 2000 The access road construction and right of way logging for polygon 1966 commenced on August 1, 2000 and was completed on September 22, During this work period, several measures were utilized to minimize sediment production from the access road. These measures included placing straw bales and energy dissipaters in the ditches, installing culverts to maintain natural drainage and grass seeding all exposed soils. Harvesting of polygon 1966 commenced in Polygon 1966 (CP 401, FL A18671 ~ 10 ha), located in the Leech Creek sub-basin, was harvested as a group selection polygon with removal of approximately 1/3 of the area. Harvesting of polygon 1966 commenced on January 29, 2001 and was shutdown on March 9, 2001 due to road load limit restrictions. During September 2001, the access road was surfaced with coarse material to reduce potential running surface erosion, and harvesting of polygon 1966 was completed by December 15, Polygon 1988 (CP405, FL A18671 ~ 8.9 ha net patch cut, 32 ha gross area), located in the Bailey Creek sub-basin, was accessed via existing roads. Reactivation and reconstruction of these roads commenced in December 2001 and harvesting was completed by February 20, Harvest of polygon 1988 was completed in 2002 as noted above. Additional forest development was limited to road deactivation (routine cross ditch and water bar construction). The access road to Bailey Creek was closed during the spring of 2002 due to environmental concerns (soft roadbed conditions). During the sample collection on May 24, 2002 (foot access only) DEL staff did not observe any sediment delivery from the roads to the streams Development of CP 403 in Schram Creek was originally scheduled for 2003, however this did not occur. The extreme fire hazard in 2003 prompted the Ministry of Forests to impose backcountry travel and work restrictions, which delayed road building and harvesting of CP 403. The Okanagan Mountain Park Fire salvage logging also delayed the scheduled work for CP 403. It is likely that CP 403 will be developed in 2004 after the salvage logging is completed. No additional road building or road deactivation activity occurred in the study area in File: Project: Date: February 2004 DOBSON ENGINEERING LTD.

14 Water Quality Monitoring / Joe Rich Creek Watershed (Year ) Proposed Forest Development Proposed forest development in the area is identified in Table 5 below. The dates for the proposed development are for planning purposes only, and are not critical, as defined in Gorman Bros. Lumber Ltd Forest Development Plan. Table 5 Proposed Forest Development CP - Block Basin Year Total Area (ha) Total Volume (m3) Silviculture System *403-1 Schram ,612 Clear-cut *403-2 Schram Partial-cut *403-3 Schram ,911 Clear-cut Bailey ,129 Clear-cut Schram ,962 Partial-cut Bailey ,417 Partial-cut Bailey ,397 Clear-cut *Development of CP 403 did not occur in 2003 and is re-scheduled for CONCLUSIONS The results of the sampling completed to date do not indicate any forest development related changes in water quality. To better isolate the potential forest development related water quality influences, sample site locations were moved on July 20, Prior to July 20, 2001, Leech Creek samples were collected approximately 2 m downstream from the water well rather than the current location (10 m upstream from the well). At Schram Creek, samples were collected within private property rather than immediately upstream from the private property boundary, and at Bailey Creek, samples were collected downstream from the road crossing rather than 3m upstream from it. Water quality at the initial site locations was possibly influenced by additional factors than at the current site locations. For this reason, it is difficult to compare results prior to July 20, 2001 with those after that date. The current sampling schedule is designed to balance data integrity with project costs. Temporal water quality variability will be better identified with several years of data. A recommendation from the 2001 report (limit the parameters to include only turbidity and suspended solids) was incorporated in 2002 and In 2003, the Southern BC Mountains region experienced the 6 th wettest spring on record since The summer of 2003 was the 4 th driest and 4 th hottest on record and the autumn of 2003 was the 11 th driest on record. File: Project: Date: February 2004 DOBSON ENGINEERING LTD.

15 Water Quality Monitoring / Joe Rich Creek Watershed (Year ) 11 Intense rainfall, and rain-on-snow events in the spring, can result in rapid increases in surface run-off and stream flow. The increased surface run-off and increased stream flow can cause increased turbidity and increased suspended solids concentrations. The maximum turbidity and suspended solids values recorded to date occurred during an extended rainfall period (May 20-23, 2002). All three study creeks experienced increased stream flow, turbidity and suspended solids resulting from the rainfall event. During the 2000, 2001 and 2002 turbid flow periods, all the turbidity values at all three sites exceeded the 1 NTU guideline. During the 2003 turbid flow period, there were occasions when the turbidity did not exceed the 1 NTU guideline. As in previous years, turbidity during the clear flow period exceeded the 1 NTU guideline at Schram Creek. This is not unusual as this value is considered low and is within the range of natural variability. None of the turbidity values exceeded the guidelines at Leech or Bailey Creeks during the clear flow period. In general, turbidity and suspended solids concentrations peak during the onset of the spring freshet, and as turbidity increases, so does suspended solids. In 2003, all but one of the suspended solids concentrations was below the detection limit. Suspended solids values do not correlate strongly with low level turbidity values (less than 5 NTU). A stronger correlation exists between the two parameters when turbidity values are higher than 5 NTU. To date, the highest turbidity and suspended solids values were measured following several days of rain in Although the maximum turbidity and suspended solids values recorded to date occurred in 2002, the values were nearly equal in all three basins regardless of the level of forest development. It is likely that the steady rainfall in May 2002 caused the increased turbidity and suspended solids values. Significant spring rainstorms did not occur in the study area in 2003, and turbidity and suspended solids were not significantly elevated following the October rainstorm. File: Project: Date: February 2004 DOBSON ENGINEERING LTD.

16 Water Quality Monitoring / Joe Rich Creek Watershed (Year ) RECOMMENDATIONS Water quality monitoring at the three sites should continue through 2004 since Gorman Bros. Lumber Ltd. has further proposed forest development in the watershed, and additional data collection is required to better identify the temporal water quality variability in the study streams. If desired, continuing this project through 2004 can be funded through the Forest Investment Account (FIA). Sampling should continue on a weekly basis during freshet and on a monthly basis during the summer and fall, and efforts to collect samples within 24 hours of rainstorm events should continue. Suspended solids analysis should only be conducted when turbidity values are greater than 5 NTU. Although fecal coliform analyses are no longer conducted as part of this project, coliform bacteria have been detected in the study streams in previous years. There are potential health risks associated with fecal contamination in drinking water, and local residents/water users should take appropriate precautions to address this issue. File: Project: Date: February 2004 DOBSON ENGINEERING LTD.

17 APPENDIX A Water Quality Monitoring Sites - Location Map

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19 APPENDIX B 2002 Lab Analysis Data

20 Appendix B - Table 1 Joe Rich Water Quality Data: Leech Creek (2003) Water Quality Guidelines for Drinking Water* Turbidity 1 NTU (maximum) Suspended Solids No Guideline Date Time NTU mg/l QA/QC Replicate Analyses 5/09/ : <1 5/15/ : <1 5/22/ : <1 May 29, /29/ : <1 Turb SS 5/29/2003 rep2 2.1 <1 Mean 2.1 <1 5/29/2003 rep3 1.9 <1 Stdev /29/2003 mean 2.1 <1 %Stdev /05/2003 9: <1 6/12/2003 9: <1 6/19/2003 9: /03/2003 9: <1 7/17/2003 9: <1 8/01/2003 8/14/2003 8/28/2003 9/18/ /02/ /14/2003 No Flow, Creek Dry No Flow, Creek Dry No Flow, Creek Dry No Flow, Creek Dry No Flow, Creek Dry No Flow, Creek Dry 10/21/ : n/a Max Min 0.35 <1 Mean/Median 1.74 <1 Stand. Dev n/a

21 Appendix B - Table 2 Joe Rich Water Quality Data: Schram Creek (2003) Water Quality Guidelines for Drinking Water* Turbidity 1 NTU (maximum) Suspended Solids No Guideline Date Time NTU mg/l QA/QC Replicate Analyses 5/09/ : <1 5/15/ : <1 5/22/ : <1 May 29, /29/ : <1 Turb SS 5/29/2003 rep2 1.5 <1 Mean 1.6 <1 5/29/2003 rep3 1.6 <1 Stdev /29/2003 mean 1.6 <1 %Stdev /05/2003 8: <1 6/12/2003 8: <1 6/19/2003 8: <1 7/03/2003 8: <1 7/17/2003 9: <1 8/01/2003 7: n/a 8/14/2003 8: n/a 8/28/2003 9: n/a 9/18/2003 9: n/a 10/02/2003 9: n/a 10/14/2003 9: n/a 10/21/2003 9: n/a Max 7.60 <1 Min 0.25 <1 Mean/Median 1.63 <1 Stand. Dev n/a

22 Appendix B - Table 3 Joe Rich Water Quality Data: Bailey Creek (2003) Water Quality Guidelines for Drinking Water* Turbidity 1 NTU (maximum) Suspended Solids No Guideline Date Time NTU mg/l QA/QC Replicate Analyses 5/09/ : <1 5/15/ : <1 5/22/ : <1 May 29, /29/ : <1 Turb SS 5/29/2003 rep2 2.2 <1 Mean 2.1 <1 5/29/2003 rep3 2.3 <1 Stdev /29/2003 mean 2.1 <1 %Stdev /05/2003 8: <1 6/12/2003 8: <1 6/19/2003 8: <1 7/03/2003 8: <1 7/17/2003 8: <1 8/01/2003 6: n/a 8/14/2003 7: n/a 8/28/2003 8: n/a 9/18/2003 8: n/a 10/02/2003 8: n/a 10/14/2003 9: n/a 10/21/2003 8: n/a Max 7.90 <1 Min 0.25 <1 Mean/Median 1.66 <1 Stand. Dev n/a

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39 APPENDIX C Precipitation and Stream Discharge Data

40 Appendix C - South BC Mountains Environment Canada Climate Data ( ) Regional Precipitation Departures From Normal - Ranked Driest to Wettest, Regional Temperature Departures From Normal - Ranked Warmest to Coolest, Spring Precipitation Summer Precipitation Summer Temperature Fall Precipitation Rank Yr Dep. % Yr Dep. % Yr Dep. C Yr Dep. %

41 Mission Creek at East Kelowna (WSC #08NM116) Area (ha): Year Max Daily Discharge (m 3 /s) m 3 /s/ha Rank n a Probability of Exceedance Recurrance Interval % % % % % % % % % % % % % Flow Data not Available % % % Flow Data not Available % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 1.0 Max 87.5 Min 29.8 Mean 50.8 *Probability of exceedance based on Gringorten equation --- P.E.=Rank-a/n+1-(2a), Recurrance Interval =1/P.E.

42 Maximum Daily Discharges (m3/s) at Mission Creek near East Kelowna (WSC #08NM116) Year Event 33 Year Event Maximum Daily Discharge (m3/s) Mean 50.8 m3/s 4 Year Event 1 Year Event Year