ANGLO AMERICAN THERMAL COAL LANDAU COLLIERY

Transcription

1 Landau Colliery DWA Quarterly Report No. 5 April to June 2013 ANGLO AMERICAN THERMAL COAL LANDAU COLLIERY Department of Water Affairs (DWA) Quarterly Report No. 2 1 st April 30 th June

2 Table of Contents 1. INTRODUCTION LANDAU COLLIERY DESCRIPTION MONITORING PROGRAM GROUNDWATER MONITORING PROGRAMME Kromdraai Navigation Groundwater monitoring Conclusion SURFACE WATER MONITORING Kromdraai Pollution Control Dams (PCD) Navigation Pollution Control Dams (PCD) PCDs Conclusion Water Discharged at the Kromdraai Liming Plant Liming Plant discharge Conclusion River and Stream Monitoring WATER STORAGE ABSTRACTION VOLUME APPENDIX 1: MAPS APPENDIX 2: GROUNDWATER QUALITY RESULTS APPENDIX 3: SURFACE WATER QUALITY RESULTS APPENDIX 4: GROUNDWATER MONITORING BOREHOLES: QUALITY RESULTS IN TABLES APPENDIX 5: GROUNDWATER MONITORING BOREHOLES: LEVELS List of Figures FIGURE 1: GROUNDWATER MONITORING LOCATIONS FOR THE KROMDRAAI SECTION OF LANDAU COLLIERY... 6 FIGURE 2: MONTHLY GROUNDWATER MONITORING POINTS AT NAVIGATION SECTION OF LANDAU COLLIERY... 7 FIGURE 3: LOCATION OF POLLUTION CONTROL DAMS AT THE KROMDRAAI SECTION FIGURE 4: LOCATION OF THE PCDS AT THE NAVIGATION SECTION FIGURE 5: LIMING PLANT AT KROMDRAAI. (FOR LOCATION REFER TO APPENDIX 1, FIGURE 6 9) FIGURE 6: LOCALITY MAP FOR LANDAU COLLIERY FIGURE 7: CATCHMENT BOUNDARIES RELEVANT TO LANDAU COLLIERY FIGURE 8: LAYOUT MAP FOR KROMDRAAI SECTION FIGURE 9: LAYOUT MAP FOR NAVIGATION SECTION FIGURE 10: SURFACE AND GROUNDWATER MONITORING POINTS... 24

3 List of Tables TABLE 1: KROMDRAAI PH TABLES... 6 TABLE 2: NAVIGATION PH RESULTS... 7 TABLE 3: NAVIGATION SULPHATE RESULTS... 8 TABLE 4: NAVIGATION TDS RESULTS... 9 TABLE 5: KROMDRAAI PCD WATER QUALITY LIMITS AS PER IWUL VALUES MAY NOT BE EXCEEDED TABLE 6: NAVIGATION PCD WATER QUALITY LIMITS AS PER IWUL VALUES MAY NOT TO BE EXCEEDED TABLE 7: LIMING PLANT DISCHARGE LIMITS AS PER IWUL TABLE 8: NAVIGATION VOLUMES OF WATER STORED IN THE DAMS AT THE END OF EACH MONTH PERIOD TABLE 9: KROMDRAAI VOLUMES OF WATER STORED IN THE DAMS AT THE END OF EACH MONTH TABLE 10: KROMDRAAI GROUNDWATER MONITORING BOREHOLE RESULTS TABLE 11: NAVIGATION GROUNDWATER MONITORING BOREHOLE RESULTS TABLE 12: GROUNDWATER MONITORING BOREHOLE LEVELS List of Graphs GRAPHS 1: PH RESULTS KROMDRAAI (3) GRAPHS 2: TDS RESULTS KROMDRAAI (3) GRAPHS 3: SULPHATE RESULTS KROMDRAAI (3) GRAPHS 4: CHLORIDE RESULTS KROMDRAAI (3) GRAPHS 5: SODIUM RESULTS KROMDRAAI (3) GRAPHS 6: IRON RESULTS KROMDRAAI (3) GRAPHS 7: ALUMINIUM RESULTS KROMDRAAI (3) GRAPHS 8: FLOURIDE RESULTS KROMDRAAI (3) GRAPHS 9: PH RESULTS NAVIGATION (3) GRAPHS 10: SULPHATE RESULTS NAVIGATION (3) GRAPHS 11: TDS RESULTS NAVIGATION (3) GRAPHS 12: IRON RESULTS NAVIGATION (3) GRAPHS 13: CHLORIDE RESULTS NAVIGATION GRAPHS 14: SODIUM RESULTS NAVIGATION GRAPHS 15: ALUMINIUM RESULTS NAVIGATION GRAPHS 16: FLUORIDE RESULTS NAVIGATION (3) GRAPHS 17: PH RESULTS PCD KROMDRAAI GRAPHS 18: TEMPERATURE RESULTS PCD KROMDRAAI... 41

4 GRAPHS 19: ALUMINIUM RESULTS PCD KROMDRAAI GRAPHS 20: CHLORIDE RESULTS PCD KROMDRAAI GRAPHS 21: IRON RESULTS PCD KROMDRAAI GRAPHS 22: SODIUM RESULTS PCD KROMDRAAI GRAPHS 23: POTASSIUM RESULTS PCD KROMDRAAI GRAPHS 24: SULPHATE RESULTS PCD KROMDRAAI GRAPHS 25: TOTAL DISSOLVED SOLIDS RESULTS PCD KROMDRAAI GRAPHS 26: CALCIUM RESULTS PCD KROMDRAAI GRAPHS 27: MAGNESIUM RESULTS PCD KROMDRAAI GRAPHS 28: PH RESULTS PCD NAVIGATION GRAPHS 29: TEMPERATURE RESULTS PCD NAVIGATION GRAPHS 30: ALUMINIUM RESULTS PCD NAVIGATION GRAPHS 31: CHLORIDE RESULTS PCD NAVIGATION GRAPHS 32: IRON RESULTS PCD NAVIGATION GRAPHS 33: SODIUM RESULTS PCD NAVIGATION GRAPHS 34: POTASSIUM RESULTS PCD NAVIGATION GRAPHS 35: SULPHATE RESULTS PCD NAVIGATION GRAPHS 36: TOTAL DISSOLVED SOLIDS PCD NAVIGATION GRAPHS 37: CALCIUM RESULTS PCD NAVIGATION GRAPHS 38: MAGNESIUM RESULTS PCD NAVIGATION GRAPHS 39: PH RESULTS LIMING PLANT GRAPHS 40: TDS RESULTS LIMING PLANT GRAPHS 41: SULPHATE RESULTS LIMING PLANT GRAPHS 42: CHLORIDE RESULTS LIMING PLANT GRAPHS 43: SODIUM RESULTS LIMING PLANT GRAPHS 44: FLUORIDE RESULTS LIMING PLANT... 49

5 ANGLO AMERICAN THERMAL COAL: LANDAU COLLIERY DWA QUARTERLY REPORT No. 2 1 st April 30th June INTRODUCTION This report summarises water related activities and monitoring results at the Anglo American Thermal Coal Landau Colliery for the second quarter, from April to June The report is prepared in accordance with conditions in the two Integrated Water Use Licenses issued to Landau Colliery by the Director General of the Department of Water Affairs on the 25 th and 26 th of January Details of the licenses are provided in the table below. Kromdraai Navigation License Number 04/B20G/ABCFGIJ/ /B20G/ABCGIJ/1498 File Number 16/2/7/B100/C101 16/2/7/B100/C LANDAU COLLIERY DESCRIPTION Landau Colliery is a business unit of Anglo American Thermal Coal, a Division of Anglo American, and consists of two sections, namely the Kromdraai Section and the Navigation Section. Landau Colliery is situated in the Emalahleni Local Municipality, which falls in the Nkangala District Municipality. The Kromdraai Section is situated 15 km north-west of Emalahleni (formerly known as Witbank) and the Navigation Section is situated 6 km south-west of Emalahleni (refer to Appendix 1, Figures 6-10). Figure 6 in Appendix 1 included in section 6 of this report provides a locality map of the Colliery indicating the various sections. Figure 7 in Appendix 1 indicates the relevant catchment boundaries and Figures 8 and 9 show the surface infrastructure related to the two sections. 3. MONITORING PROGRAM In accordance with the approved EMPR, Landau Colliery has implemented a comprehensive water monitoring program. The program is regulated through the procedure LIMS_OP_ and covers both surface and groundwater monitoring. Surface water monitoring locations are provided in Figure 10 in Appendix 1. In addition, a quarterly stream profile for all impacted rivers and streams is conducted by a third party Aquatico Sceintific. This report shall be submitted as an attachment to this quarterly report GROUNDWATER MONITORING PROGRAMME A comprehensive monthly ground water monitoring program is conducted at Landau Colliery. Both borehole levels and water quality is determined. The quality results from selected boreholes, selected based on risk, will be presented and discussed in detail in the following sections. The full monitoring results will also be provided in Appendix 2 for Groundwater Quality Results (Graphs), Appendix 3 for Surface Water Quality Results (Graphs), Appendix 4 for Water Results Tables and Appendix 5 for Borehole Water Levels Kromdraai All groundwater monitoring sites are sampled on a monthly basis and samples sent for laboratory analysis. Compliance is measured against the SANS Class 2 drinking water standard. The results discussed below are of those samples which are not compliant to the standard. Groundwater monitoring locations for the Kromdraai section are shown in Figure 1 below.

6 Figure 1: Groundwater monitoring locations for the Kromdraai section of Landau Colliery ph Results Samples in 18 locations were taken to assess the levels of ph in groundwater. Out of the 18 samples5 were below the ph lower limit of 5 in this second quarter of All other samples remained within historic ranges and no significant deviations were recorded during the reporting period. The results are discussed in table 1 below. Table 1: Kromdraai ph Tables Samples Result (Average Q2) Reason KRW014 KRW024 and 4.12 and 4.17 KRW014 and KRW024 are located at the northern boundaries of Kromdraai where they are mostly affected by external old defunct mines. The ph is expected to remain at this low levels until the dewatering project to pump out all the acidic water has commenced. KRW This borehole is located at the edge of the opencast area where water is highly acidic due to previous and current mining activities. Water in this area is pumped out and sent to the liming plant for treatment. KRW034, and and4.7, These boreholes are located in the old underground workings where water is highly acidic. This water is currently dewatered to the liming plant for treatment. Over the reporting period ph remained stable in these monitoring holes except in the case of KRW040 where a ph of 5.9 was recorded in the final month of Quarter 1. The ph has stabled at 5 for the past three months of this

7 Samples Result (Average Q2) Reason quarter and hence KRW040 is not included in the list of the samples recording exceedences. Three graphs have been drawn up to indicate the ph results and these can be viewed in Appendix 2 (A. Kromdraai Graphs Not Compliant to SANS 2 Drinking water standards) No other monitoring locations exceeded the limits at Kromdraai for all other groundwater parameters in terms of the SANS water quality standards. The results can be viewed in graphs and tables listed in Appendix 2 (B. Kromdraai Graphs Compliant to SANS 2 Drinking water standards) Navigation All groundwater monitoring sites are measured on a monthly basis and samples are sent for laboratory analysis. Compliance is measured against the SANS Class 2 drinking water standard. Results discussed below are of those samples not compliant to the standards. The discussion will provide information on accidences and reasons thereof. Groundwater monitoring locations for the Navigation section are shown in Figure 2 below. Figure 2: Monthly groundwater monitoring points at Navigation Section of Landau Colliery ph Results Samples in 23 locations were taken to assess the levels of ph in groundwater. Out of the 23 samples only 4 were below the ph lower limit of 5, and thus are not compliant to the SANS drinking water standards. The results are discussed in table 2 below. Table 2: Navigation ph Results

8 Samples 2S5, 2S6 and NAV201 Result (Average Q4) 4.33, 3.64 and 3.39 Reason These boreholes are located at the Schoongezicht old underground workings. The water in these underground workings is highly acidic and decants into Schoonie Dam. It is then pumped to the Navigation Liming Plant and Emalahleni Water Reclamation Plant for treatment. 2S5 has had historic good ph levels averaging at 5.5, however there has been a decline in ph levels since January This could be an indication of pollution plume developing. SPC This borehole is located adjacent the Blaauwkraans Toe Seep where acidic seepage water is collected and pumped back to the liming plant for treatment. Three graphs have been drawn up to indicate the ph results and these can be viewed in Appendix 2 (C. Navigation Graphs Not Compliant to SANS 2 Drinking water standards) Sulphate (SO 4 2- ) Results 2- Samples in 23 locations were taken to assess the levels of SO 4 in groundwater. Out of the 23 samples only 5 were above the SANS limit of 500, and thus are not compliant to the SANS drinking water standards. An improvement has been noted on sample NAW003. The results are discussed in table 3 below. Table 3: Navigation Sulphate Results Samples Result (Average Q4) Reason 2S6 and NAV and Both boreholes are within the old underground workings in this area that decant into the Schoonie PCD and is subsequently pumped to the Navigation Liming Plant and Emalahleni Water Reclamation Plant for treatment. The high sulphate levels are indicative of AMD. SPC002 and and Both these boreholes are located at the boundaries of Blaauwkrans co-disposal facility. They may be affected by the pollution plume from the co-disposal facility which will be characteristic of AMD. SPC002 sulphate content decreased in March through to May and increased again in the month of June. This will continuously be monitored for a better understanding of the results SPC As noted above, this borehole is located adjacent the Blaauwkraans Toe Seep where acidic seepage water is collected and pumped back to the liming plant. There s a sharp increase in sulphate content Graphs presenting the SO 4 2 monitoring results be viewed in Appendix 2 (C. Navigation Graphs Not Compliant to SANS 2 Drinking water standards).

9 Total Dissolved Salts (TDS) Results Samples in 23 locations were taken to assess the levels of TDS in groundwater. Out of the 23 samples only 2 were above the SANS limit of 1200, and thus are not compliant to the SANS drinking water standards. Sample NAW003, has shown a significant improvement in both sulphate content and TDS and has registered below the SANS limit in this quarter. The rest of the results are discussed in table 3 below. Table 4: Navigation TDS Results Samples Result (Average Q4) Reason NAV Sample 2S6 TDS content has decreased and is below the limit of Historical underground mining is the result of this high TDS at NAV201, also linked to the low ph and high sulphate content indicated in Tables 2 and 3 above. SPC As noted above, this borehole is located adjacent the Blaauwkrans Toe Seep where acidic seepage water is collected and pumped back to the liming plant for treatment. The sharp increase in salt content is noted, and there will be continued monitoring to better understand the impacts. The graphs representing the TDS results can be viewed in Appendix 2 (B. Graphs Not compliant to SANS 2 drinking water standards) These were the only 3 parameters that exceeded the standard limits. All other parameters were within the SANS drinking water standard limits. The graphs and tables for all other parameters may be viewed in Appendix 2 (D. Navigation Graphs Compliant to SANS 2 Drinking water standards) Conclusion In most cases monitored results were as expected. To this end Landau Colliery is in the process of developing detailed groundwater models based on the WISHWHAC software which should provide a better understanding of the hydro-geological environment SURFACE WATER MONITORING A comprehensive surface water monitoring program is undertaken at Landau Colliery. This entails monthly sampling by the operation and quarterly catchment wide river and stream sampling by a third party, Aquatico Scientific. This report will detail the results of the on mine monitoring program specifically focusing on the pollution control structures and the liming plant at Kromdraai. The river and stream profile report is included as an attachment to this report and is titled Quarterly Upper Olifants River Basin Water Quality Assessment Report Kromdraai Pollution Control Dams (PCD) Water samples are taken from three PCDs on a monthly basis and samples sent for laboratory analysis. Compliance is measured against the limits set on page 18 of 27 of the Kromdraai IWUL (04/B20G/ABCFGIJ/1245). Results discussed below are of those samples not compliant to the limits

10 set in the licence. It must be noted that an amendment request was submitted to the Department on 31 August 2012, to request for an amendment of some of the limits including the limits for sulphate, Temperature, TDS, aluminium, iron, etc. In this quarter water sample collection was only conducted in the months of January and February only, due to the absence of the Water Sampler who has been booked off for the past two months. The analysis represented below is thus only for the months of January and February. The samples are taken at these dams, the Kromdraai Pollution Control Dam, the Excelsior Pollution Control dam and the Dixon Dam. The water in the Kromdraai PCD is used to contain water from surface runoff. This water is pumped to the liming plant for treatment and is recycled for use on the mine. Water contained in the Dixon Dam is contaminated mine water from the North Block of the Kromdraai Section, it is pumped to the Liming plant for treatment. A portion of this water is recycled for re-use in the plant and the remaining volume is discharged, under license to the Kromdraaispruit. Water contained in the Excelsior PCD is contaminated water from the Excelsior Block. The water monitoring points representing these dams are: WP052 Dixon Dam WP406 Kromdraai PCD WP410 Excelsior PCD Figure 3 below shows the location of the licensed pollution control dams at the Kromdraai section. Figure 3: Location of pollution control dams at the Kromdraai Section Table 5: Kromdraai PCD Water Quality Limits as per IWUL values may not be exceeded Parameter Water quality limits for Waste Water Facilities ph 6.32 Temperature ( C) 22.4 Acidity in mg/l 49.9 Aluminium in mg/l 0.14

11 Parameter Water quality limits for Waste Water Facilities Chloride in mg/l 18.5 Iron in mg/l 1.3 Mercury in mg/l 85.3 Sodium in mg/l Potassium in mg/l 11.0 Sulphate in mg/l Total dissolved solids in mg/l 3636 Total suspended solids in mg/l 112 Calcium in mg/l Magnesium in mg/l 3.48 Manganese in mg/l 0.21 Alkalinity in mg/l 155 Aluminium, Iron, Calcium, and Magnesium Results The water quality in the Dixon and Excelsior Dams have exceeded the limit over the reporting period. This is expected due to the nature of the water at Kromdraai and indicates that the limits set in the license are unrealistic. The Kromdraai PCD has been drained for maintenance and cleaning during this reporting period. An amendment of the limits has been requested from the Department and the submission for an amendment was done on 31 August Sulphate and TDS Results Both WP052 (Dixon PCD) and WP410 (Excelsior PCD) exceeded the licensed limits in terms of the above parameters during the reporting period. The Excelsior PCD as indicated above contains water from the Excelsior South Block, which is water dewatered from underground workings and water from the workshops. The Dixon PCD contains contaminated water from the North Block of the Kromdraai Section which is pumped to the Liming plant for treatment. Both dams contain AMD which is expected to be high in sulphates and TDS. An amendment for these limits is also included in the amendment request. The Graphs for all the Kromdraai PCDs can be viewed in Appendix 3 Surface Water Quality Results (A. Kromdraai Pollution Control Dams: Water Quality Graphs) Navigation Pollution Control Dams (PCDs) Water samples are taken from seven PCDs on a monthly basis and samples sent for laboratory analysis. Compliance is measured against the limits set on page 21 of 29 of the Navigation IWUL (04/B20G/ABCFGIJ/1498). Results discussed below are of those samples not compliant to the limits set in the licence.. (It must be noted that an amendment request was submitted to the Department on 31 August 2012, to request for an amendment of some of the limits including the limits for ph, Temperature, chloride, potassium, calcium, and magnesium.)

12 In this quarter water sample collection was only conducted in the month of January, due to the absence of the Water Sampler who has been booked off for the past two months. The analysis represented below is thus only for the month of January. Water samples are collected at these dams, the Navigation West/Umlalazi Pollution Control Dam, Schoongezicht Pollution Control Dam, Navigation Acid Water Dam, Navigation Pollution Control Dam, Navigation Raw Water Dam, Toe Seep Emergency Dam and the Toe Dam. The Navigation West PCD is used to collect contaminated runoff from the Navigation West Section Plant and Workshop areas, for re-use as process make-up water. This dam is used to temporarily store in-pit water prior to the re-use thereof. The Schoongezicht PCD mainly contains decant from old Schoongezicht underground workings, for treatment at the Navigation Liming Plants and re-use. The Navigation Acid Water Dam is used as a balancing dam prior to treatment in the Navigation Liming Plant. The Navigation PCD is used to contain contaminated runoff water, overflow from the penstock return water system and Toe Dam as well as water from Navigation West Section PCD for treatment at the Navigation Neutralisation Plant and re-use. The Toe Seep Emergency Dam is utilised to capture toe seep water emanating from the Blaauwkrans Co-Disposal Facility, the Toe Dam is used to contain seepage and polluted runoff from Blaauwkrans Co-disposal facility. Water from both dams is pumped for treatment at the Navigation Liming Plants before being re-used as make-up water at the Navigation Beneficiation Plant. The water monitoring points representing these dams are: WP068 Schoongezicht PCD WP069 Navigation Acid Water Dam WP070 Navigation Raw Water Dam WP072 Navigation PCD WP078 Toe Dam WP203 Toe Seep Emergency Water Dam WP409 Navigation West/Umlalazi PCD Figure 4 below shows the location of the licensed pollution control dams at the Navigation section. Figure 4: Location of the PCDs at the Navigation Section

13 Table 6: Navigation section PCDs Water Quality Limits as per IWUL values may not to be exceeded Parameter Water quality limits for Waste Water Facility ph 2.83 Temperature Acidity in mg/l Aluminium in mg/l 295 Chloride in mg/l Iron in mg/l 4840 Mercury in mg/l 85.3 Sodium in mg/l Potassium in mg/l 10.8 Sulphate in mg/l Total dissolved solids in mg/l Total suspended solids in mg/l 239 Calcium in mg/l 370 Magnesium in mg/l 276 Manganese in mg/l 93.4 ph Results Exceedances have been noted for WP068 (Schoonie PCD) which contains acidic water from underground workings, WP070 (Raw Water Dam) which contains neutralised mine water, WP072 (Navigation PCD) containing all dirty runoff from the mine, WP078 (Toe Dam) containing seepage from Blaauwkraans co-disposal facility and WP409 (Umlalazi PCD) containing water from the plant and workshops at Umlalazi. All of the dams except for Umlalazi are expected to have low ph as they contain largely highly acidic water coming from either mine processes or dirty runoff contaminated from the mine area. Potassium, Calcium, Chloride and Magnesium Results Samples taken from WP068, 69, 70, 72, 78, 203 and 409 exceeded the limits. This is as expected due to the nature of the water contained in these dams. The lime neutralisation that takes place at the Navigation Section Liming Plant contributes to the increase in calcium content in the dams. These

14 parameters have been included as part of the limits to be amended as part of the amendment request submitted to the Department on 31 August The Graphs for all the Navigation PCD can be viewed in Appendix 3 Surface Water Quality Results (B. Navigation Pollution Control Dams: Water Quality Graphs) PCDs Conclusion Water quality in the PCDs has remained relatively stable over the reporting period. Clearly some license conditions are not achievable and as such require amendment. The amendment request was submitted to the department on the 31 st of August Water Discharged at the Kromdraai Liming Plant The main function of the Liming Plant at Kromdraai is to neutralize and soften the highly polluted acidic inflow from the various AMD sources. All the water from the Kromdraai PCDs (refer to 3.2.1), voids, open pits, and dewatering boreholes are pumped to the Liming plant for neutralization from an average ph of 2.5 to an average ph of 6.5. Limestone is the preferred medium for neutralization. Hydrated Lime is used as a standby system. Figure 5 below is a picture of the Liming Plant at Kromdraai. Figure 5: Liming Plant at Kromdraai. (for location refer to Appendix 1, Figure 6 9) The Process consists of a conditioning tank, an aerator, and a clarifier. The Liming Plant has a design capacity of 14 Ml/day even though only an average of 8.5 is treated on a day-to-day basis. The liming process is automated through the use of SCADA. Samples are collected on a two hourly basis, during the week from these areas: Feed Water (Influent from Lopies Dam) - ph, acidity, alkalinity and EC After the agitation Process - ph, and conductivity After Clarification Process (Final product) ph, conductivity, alkalinity, acidity, and conductivity Yellow buoy sample PH, EC and Solids percentage

15 Treated water is pumped to the Raw Water Dam for dust suppression and the excess is discharged to the Kromdraaispruit. The results presented in this report are the results of samples taken from the clarification process for discharge into Kromdraaispruit. Compliance is measured against the limits set on page 19 of 27 of the Kromdraai IWUL (04/B20G/ABCFGIJ/1245). Results discussed below are of those samples not compliant to the limits set in the licence. It must be noted that an amendment request was submitted to the Department on 31 August 2012, to request for an amendment of some of the limits including the limits for ph, Temperature, Chloride, Potassium, calcium, and Magnesium. A request has been made for an interim target based on the capabilities of lime neutralisation. Table 7: Liming Plant Discharge Limits as per IWUL Parameter Water quality limits for Waste Water Facility ph Electrical Conductivity in ms/m Chloride in mg/l Sodium in mg/l Potassium in mg/l Sulphate in mg/l Total dissolved solids in mg/l Calcium in mg/l Fluoride in mg/l Magnesium in mg/l Nitrate and nitrite in mg/l Total Alkalinity in mg/l TDS, Sulphate and Sodium Results TDS, sodium and sulphate concentrations continually exceed the limits set in the IWUL for discharge water. (Refer to the IWUL amendment request). Fluoride Results Flouride concentrations continue to show exceedances for April and May, but the levels decrease to below the limit in June. This will be further observed for the coming months.. The Liming Plant water quality graphs can be viewed in Appendix 3 Surface Water Quality Results (C. Liming Plant Discharge Qualities: Graphs) Liming Plant discharge Conclusion

16 In general the qualities discharged by the liming plant are not compliant to the limits as set by the IWUL. The treatment process used at the liming plant cannot treat the water to the qualities as set by the IWUL and thus make these limits unattainable. A request to amend these limits forms part of the amendment request submitted to the Department on 31 August River and Stream Monitoring The reader is referred to the attached report Quarterly Upper Olifants River Basin Water Quality Assessment. 4. WATER STORAGE Table 8 below shows the volume of water stored in the dams at the end of each month of the reporting period at the Navigation section. Table 8: Navigation Volumes of water stored in the Dams at the end of each month period. Date Raw Water Dam (m 3 ) Acid Water Dam (m 3 ) Schoonie Dam (m 3 ) Navigation dam (m 3 ) Dam Capacity Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun It should be noted that volumes are based on percentage of capacity as determined by automated level indicators and levels are recorded on the Scada System. Several licensed dams have no automated systems and are as such left out of the current volume descriptions. Every effort will be made to place these dams onto the system and to report on the volumes held in later reports. In addition, no compensation for silting has been made. Table 9 below shows the volume of water stored in the dams at the end of each month of the reporting period at the Kromdraai section.

17 Table 9: Kromdraai Volumes of water stored in the Dams at the end of each month Date Kromdraai PC Dam (m 3 ) Kromdraai Holding Dam (Lopies) (m 3 ) Raw Water Dam (m 3 ) Dixon Dam (m 3 ) Dam Capacity Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan-13 Dam cleaning Feb-13 Dam cleaning Mar-13 Dam cleaning Apr May Jun The marked reduction in the volume stored in Dixon dam is as a result of the newly installed pipeline which takes water from the dam to the liming plant for treatment. This dam is kept as empty as possible. 5. ABSTRACTION VOLUME Infrastructure i.e. flow meters have been ordered to allow accurate determination of the total water abstracted. This information will be provided in subsequent reports. Report Compiled by: Report Reviewed by: S. F. Vilakazi F. M. Grove Environmental Officer Environmental Superintendent

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19 Landau Colliery DWA Quarterly Report No. 5 April to June APPENDIX 1: MAPS Figure 6: Locality Map for Landau Colliery 19

20 Figure 7: Catchment Boundaries relevant to Landau Colliery

21 Landau Colliery DWA Quarterly Report No. 5 April to June 2013 Figure 8: Layout Map for Kromdraai Section 21

22 Landau Colliery DWA Quarterly Report No. 5 April to June 2013 Figure 9: Layout map for Navigation Section 22

23 Landau Colliery DWA Quarterly Report No. 5 April to June

24 Figure 10: Surface (plan on previous page) and Groundwater Monitoring (plan on this page) points 7. APPENDIX 2: GROUNDWATER QUALITY RESULTS A. KROMDRAAI GRAPHS NOT COMPLIANT TO SANS 2 DRINKING WATER STANDARDS

25 Graphs 1: ph Results Kromdraai (3) B. KROMDRAAI GRAPHS COMPLIANT TO SANS 2 DRINKING WATER STANDARDS Graphs 2: TDS Results Kromdraai (3)

26 Graphs 3: Sulphate results Kromdraai (3)

27 Graphs 4: chloride Results Kromdraai (3)

28 Graphs 5: Sodium Results Kromdraai (3)

29 Graphs 6: Iron Results Kromdraai (3)

30 Graphs 7: Aluminium Results Kromdraai (3)

31 Graphs 8: Flouride Results Kromdraai (3)

32 C. NAVIGATION GRAPHS NOT COMPLIANT TO SANS 2 DRINKING WATER STANDARDS Graphs 9: phh Results navigation (3)

33 Graphs 10: Sulphate Results Navigation (3)

34 Graphs 11: TDS results Navigation (3)

35 D. NAVIGATION GRAPHS COMPLIANT TO SANS 2 DRINKING WATER STANDARDS Graphs 12: Iron results navigation (3)

36 Graphs 13: Chloride results Navigation(3)

37 Graphs 14: Sodium results Navigation (3)

38 Graphs 15: Aluminium results navigation (3)

39 Graphs 16: Fluoride results Navigation (3)

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41 8. APPENDIX 3: SURFACE WATER QUALITY RESULTS A. KROMDRAAI POLLUTION CONTROL DAMS: QUALITY GRAPHS Graphs 17: ph results PCD Kromdraai Graphs 18: Temperature results PCD Kromdraai Graphs 19: Aluminium results PCD Kromdraai

42 Graphs 20: Chloride results PCD Kromdraai Graphs 21: Iron results PCD Kromdraai Graphs 22: Sodium results PCD Kromdraai Graphs 23: Potassium results PCD Kromdraai

43 Graphs 24: Sulphate results PCD Kromdraai Graphs 25: Total Dissolved solids results PCD Kromdraai

44 Graphs 26: Calcium results PCD Kromdraai Graphs 27: Magnesium results PCD Kromdraai B. NAVIGATION POLLUTION CONTROL DAMS: QUALITY GRAPHS Graphs 28: ph Results PCD Navigation Graphs 29: Temperature Results PCD Navigation

45 Graphs 30: Aluminium Results PCD Navigation Graphs 31: Chloride Results PCD Navigation Graphs 32: Iron Results PCD Navigation

46 Graphs 33: Sodium Results PCD Navigation Graphs 34: Potassium Results PCD Navigation Graphs 35: Sulphate Results PCD Navigation

47 Graphs 36: Total Dissolved Solids PCD Navigation Graphs 37: Calcium Results PCD Navigation Graphs 38: Magnesium Results PCD Navigation

48 C. LIMING PLANT DISCHARGE LIMITS: GRAPHS Graphs 39: ph Results Liming Plant Graphs 40: TDS Results Liming Plant Graphs 41: Sulphate Results Liming Plant

49 Graphs 42: Chloride Results Liming Plant Graphs 43: Sodium Results Liming Plant Graphs 44: Fluoride Results Liming Plant

50 9. APPENDIX 4: GROUNDWATER MONITORING BOREHOLES: QUALITY RESULTS IN TABLES A. KROMDRAAI GROUNDWATER MONITORING Table 10: Kromdraai groundwater monitoring borehole results Site Date Fe Ph Cl Mg Na Al Ca SO4 K TDS F Kromdraai Groundwater Qualities (January) KRW012 08/01/ KRW014 08/01/ KRW024 08/01/ KRW026 08/01/ KRW027 08/01/ KRW028 08/01/ KRW029 08/01/ KRW030 08/01/ KRW031 08/01/ KRW032 08/01/ KRW034 08/01/ KRW035 08/01/ KRW036 08/01/ KRW038 08/01/ KRW039 08/01/ KRW040 08/01/ KRW041 08/01/ KRW043 08/01/ KRW047 08/01/ KRW049 08/01/ Kromdraai Groundwater Qualities (February) KRW012 04/02/ KRW014 04/02/

51 Site Date Fe Ph Cl Mg Na Al Ca SO4 K TDS F KRW024 04/02/ KRW026 04/02/ KRW027 04/02/ KRW028 04/02/ KRW029 04/02/ KRW030 04/02/ KRW031 04/02/ KRW032 04/02/ KRW034 04/02/ KRW035 04/02/ KRW036 04/02/ KRW038 04/02/ KRW039 04/02/ KRW040 04/02/ KRW041 04/02/ KRW043 04/02/ KRW047 04/02/ KRW049 04/02/ Kromdraai Groundwater Qualities (March) KRW012 13/03/ KRW014 13/03/ KRW024 13/03/ KRW026 13/03/ KRW027 13/03/ KRW028 13/03/ KRW029 13/03/ KRW030 13/03/ KRW031 13/03/ KRW032 13/03/ KRW034 13/03/ KRW035 13/03/ KRW036 13/03/ KRW038 13/03/ KRW039 13/03/ KRW040 13/03/ KRW041 13/03/ KRW043 13/03/ KRW047 13/03/ KRW049 13/03/ Kromdraai Groundwater Qualities (April) KRW012 29/04/ KRW014 29/04/ KRW024 29/04/ KRW026 29/04/

52 Site Date Fe Ph Cl Mg Na Al Ca SO4 K TDS F KRW027 29/04/ KRW028 29/04/ KRW029 29/04/ KRW030 29/04/ KRW031 29/04/ KRW034 29/04/ KRW035 29/04/ KRW036 29/04/ KRW038 29/04/ KRW039 29/04/ KRW040 29/04/ KRW041 29/04/ KRW043 29/04/ KRW049 29/04/ Kromdraai Groundwater Qualities (May) KRW012 21/05/ KRW014 21/05/ KRW024 21/05/ KRW026 21/05/ KRW027 21/05/ KRW028 21/05/ KRW029 21/05/ KRW030 21/05/ KRW031 21/05/ KRW034 21/05/ KRW035 21/05/ KRW036 21/05/ KRW038 21/05/ KRW039 21/05/ KRW040 21/05/ KRW041 21/05/ KRW043 21/05/ KRW049 21/05/ Kromdraai Groundwater Qualities (June) KRW012 11/06/ KRW014 11/06/ KRW024 11/06/ KRW026 11/06/ KRW027 11/06/ KRW028 11/06/ KRW029 11/06/ KRW030 11/06/ KRW031 11/06/ KRW034 11/06/

53 Site Date Fe Ph Cl Mg Na Al Ca SO4 K TDS F KRW035 11/06/ KRW036 11/06/ KRW038 11/06/ KRW039 11/06/ KRW040 11/06/ KRW041 11/06/ KRW043 11/06/ KRW049 11/06/ B. NAVIGATION GROUNDWATER MONITORING Table 11: Navigation groundwater monitoring borehole results Site Date Fe ph Cl Mg Na Al Ca SO4 K TDS F Navigation Groundwater Qualities (January) 2S5 09/01/ S6 09/01/ S5 09/01/ NAV101 09/01/ NAV201 09/01/ NAV501 09/01/ NAV504 09/01/ NAW001 09/01/ NAW003 09/01/ NAW005 09/01/ NAW008 09/01/ NAW009 09/01/ NAW010 09/01/ NAW011 09/01/ NWG02 09/01/ NWG05 09/01/ NWG07 09/01/ NWG08 09/01/ SPC002 09/01/ SPC003 09/01/ SPC004 09/01/ SPC007 09/01/ Navigation Groundwater Qualities (February) 2S5 06/02/ S6 06/02/

54 Site Date Fe ph Cl Mg Na Al Ca SO4 K TDS F 5S5 06/02/ NAV101 06/02/ NAV201 06/02/ NAV501 06/02/ NAV504 06/02/ NAW001 06/02/ NAW003 06/02/ NAW005 06/02/ NAW008 06/02/ NAW009 06/02/ NAW010 06/02/ NAW011 06/02/ NWG02 06/02/ NWG05 06/02/ NWG07 06/02/ NWG08 06/02/ SPC002 06/02/ SPC003 06/02/ SPC004 06/02/ SPC007 06/02/ Navigation Groundwater Qualities (March) 2S5 19/03/ S6 19/03/ S5 19/03/ NAV101 19/03/ NAV201 19/03/ NAV501 19/03/ NAV504 19/03/ NAW001 19/03/ NAW003 19/03/ NAW005 19/03/ NAW008 19/03/ NAW009 19/03/ NAW010 19/03/ NAW011 19/03/ NWG02 19/03/ NWG05 19/03/ NWG07 19/03/ NWG08 19/03/ SPC002 19/03/ SPC003 19/03/ SPC004 19/03/ SPC007 19/03/ Navigation Groundwater Qualities (April)

55 Site Date Fe ph Cl Mg Na Al Ca SO4 K TDS F 2S5 16/04/ S6 16/04/ S5 16/04/ NAV101 16/04/ NAV201 16/04/ NAV501 16/04/ NAV504 16/04/ NAW001 16/04/ NAW003 16/04/ NAW005 16/04/ NAW008 16/04/ NAW009 16/04/ NAW010 16/04/ NAW011 16/04/ NWG02 16/04/ NWG05 16/04/ NWG06 16/04/ NWG07 16/04/ NWG08 16/04/ SPC002 16/04/ SPC003 16/04/ SPC004 16/04/ SPC007 16/04/ Navigation Groundwater Qualities (May) 2S5 21/05/ S6 21/05/ S5 21/05/ NAV101 21/05/ NAV201 21/05/ NAV501 21/05/ NAV504 21/05/ NAW001 21/05/ NAW003 21/05/ NAW005 21/05/ NAW008 21/05/ NAW009 21/05/ NAW010 21/05/ NAW011 21/05/ NWG02 21/05/ NWG05 21/05/2013 NWG06 21/05/ NWG07 21/05/ NWG08 21/05/ SPC002 21/05/

56 Site Date Fe ph Cl Mg Na Al Ca SO4 K TDS F SPC003 21/05/ SPC004 21/05/ SPC007 21/05/ Navigation Groundwater Qualities (June) 2S5 04/06/ S6 04/06/ S5 04/06/ NAV101 04/06/ NAV201 04/06/ NAV501 04/06/ NAV504 04/06/ NAW001 04/06/ NAW003 04/06/ NAW005 04/06/ NAW008 04/06/ NAW009 04/06/ NAW010 04/06/ NAW011 04/06/ NWG02 04/06/ NWG05 04/06/ NWG06 04/06/ NWG07 04/06/ NWG08 04/06/ SPC002 04/06/ SPC003 04/06/ SPC004 04/06/ SPC007 04/06/ APPENDIX 5: GROUNDWATER MONITORING BOREHOLES: LEVELS Table 12: Groundwater Monitoring Borehole Levels DateTimeMeas NAV101 NAV102 NAV 201 NAV501 KRW006 KRW040 24/08/11 14: /09/11 14: /09/11 14: /09/11 14: /10/11 14: /10/11 14: /10/11 14: /10/11 14: /11/11 14: /11/11 14: /11/11 14: /11/11 14: