Appendix G. Lab Testing Results

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1 Appendix G Lab Testing Results

2 132 Vincent Street PO Box 6345, Auckland 1141, New Zealand T: // F: E: info@beca.com // Industrial BENZ PO Box 5647 Auckland 1141 New Zealand Attention: Ross Plumpton Report 10:070 Dear Ross, Escarpment Mine Coal Slurry Leaching Experiment and Flocculation Trial Envirolab was requested by Beca Industrial section to undertake an investigation of possible leaching from coal undergoing hydraulic transportation along a proposed 10 km long pipeline. Additional flocculation trials were undertaken to establish the degree of treatment required for the resulting effluent generated after the use of hydraulic transport for the coal. Samples of the coal and water were received on the 10 May For the purpose of this report the samples were given the Envirolab references 10:070/C and 10:070/W (coal and water respectively). This report relates only to the samples as received, sampling was undertaken by others. The following information was provided with the samples. Coal source: Escarpment Drive, E N, (5.5 kg); Water source: Upper Waimangaroa, E N, (25litres); Pipeline design criteria. Coal transport rate: 160 t/hr Water Volume: 240 m 3 /hr Velocity: Likely m/s (1.6 m/s min) Coal size lumps: ~ 50 mm with fines Submersion time: ~ 60 minutes. The coal as received was a mixture of slabs, aggregates and fines. In preparation the large pieces were broken up to approximately 50 mm pieces. However, due to the fragile nature of the material, the coal tended to shatter forming larger amounts of fines. This Laboratory is accredited by International Accreditation New Zealand (IANZ). All testing reported herein have been performed in accordance with the laboratory s scope of accreditation, with the exception of tests marked (Non IANZ), which are not accredited. This report may not be reproduced, except in full, without the written consent of the signatory. Preparation of samples, leaching and flocculation trials are NonIANZ. NZ

3 Page 2 Leaching Methodology Traditionally leaching methods are designed to simulate contaminant leaching under municipal landfill conditions (Toxicity Characteristics Leaching Procedure TCLP) or to mimic acidic rainfall on wastes and soils (Synthetic Precipitation Leaching Procedure SPLP). Both these extraction methods are undertaken under acidic conditions and based upon the aims of the feasibility study this was considered to be too aggressive and thus not representative of the processes that are likely to occur within the transportation pipeline. Following discussion and advice from the BecaWater section a bench study was specifically designed whereby samples of coal and the local water supply are mixed on a rolling/rocking table. The resultant water was subsequently extracted at varying time intervals to determine if there is an increase in the quantity of any contaminants being measured, leaching into the testing water over time. It is stressed that this is a bench scale study, and thus not necessarily a wholly accurate replication of actual conditions that may occur within the proposed 10 km pipeline. Based on the information provided and the equipment readily available to undertake the testing a 2litre HDPE container with a diameter of 110 mm and length of 230 mm was selected as the testing cell. The ratio of coal to water, based on the coal transport rate and water volume, is 0.6:1 coal to water (weight basis). The actual amount used in the test cell was 0.8 kg coal to 1.33 kg of water (to maximise the amount of available leached water for testing). The testing cell was loaded and rolled/rocked for the following periods 1 hr, 2 hrs, 8 hrs and 18 hrs *. After each period the sample was tested and a new sample prepared using new material and water (again to maximise the amount of leached water require for testing). The rolling/rocking table is a gentle process designed to maximise the contact between the materials and extraction fluid. It is not a physical process where the coal may be thrown against other pieces potentially breaking them up further. The resulting extracted fluid was passed through a 0.5 mm test sieve and then settled in an Imhoff cone for 1 hour. The resulting settled sediment was removed and the supernatant was taken for testing for the following: ph, conductivity, ORP, dissolved oxygen (DO), turbidity Dissolved heavy metals (As, Cd, Cr, Co, Pb, Ni, Zn, Hg, Fe, Mn, Al, B). Anion/Cation profile (Ca, Mg, hardness, Na, K, alkalinity, nitraten, nitriten, NH 3, sulphate, chloride, sulphide) Suspended solids Dissolved solids Dissolved organic carbon (DOC) SemiVolatile Organic Compounds (SVOC) profile (Phenols, PAHs, OCPs etc) * 18hrs is typically used in the leaching as this allows time for preparation, extraction and testing. NZ

4 Page 3 Testing was undertaken either by Envirolab or subconsulted to R.J Hills Laboratories Ltd (Hill Laboratories). The results are reported in Table 1, a photo of the Imhoff cone (Photo 1) is included at the end of the report. A discussion of the results is included at the end of the report section. Flocculation Trial Methodology The flocculation trial involved preparing a simulated fluid then treating it with chemicals to determine if they would aid in the settling of the suspended material. The simulated fluid was produced by mixing 0.6:1 coal to water in a bucket with a rotary drill and paddle for approximately 4 hours. The extracted fluid was then passed through 0.5 mm test sieve and allowed to settle for 1 hour. The resulting supernatant was decanted off for the testing. It was necessary to reuse some of the coal from the leaching study to obtain sufficient material, the reused coal was broken up again so as to include fines which may have been washed off during the leaching study. Results of the flocculation trials are presented in Table 2 with Photos 2 to 4 included at the end of the report. A discussion of the results is included at the end of the results section. Results Leaching On mixing the coal and water together it produced a black liquid immediately. On settling in the Imhoff cone it was not possible to view any settling with the solution being too dark (Photo 1). A slightly opaque layer had formed at the top of the settled sample, forming within 15 minutes. However, the remaining volume remained black throughout the 1 hour settling period. The settled solids were taken by removing the bottom plug of the Imhoff cone and collecting approximately 100 ml of material. This was further settled for approximately 2 hrs after which the solids component became visible. The remain liquid suspension was collected and subdivided into appropriate bottles for testing (Table 1). Description Unit Table 1 Leaching Study Supernatant Results Raw Water Upper Waimangaroa 1 Hr 2 Hrs 8 Hrs 18 Hrs Envirolab Ref 10:070/Raw 10:070/1hr 10:070/2hr 10:070/8hr 10:070/18hr ph Conductivity µs/cm Oxidation Reduction Potential (ORP) Dissolved Oxygen mv % 100% 100% 102% 100% 94% Turbidity NTU NZ

5 Page 4 Description Unit Raw Water Upper Waimangaroa 1 Hr 2 Hrs 8 Hrs 18 Hrs Envirolab Ref 10:070/Raw 10:070/1hr 10:070/2hr 10:070/8hr 10:070/18hr Suspended Solids UV (F) Dissolved Solids g/m cm ppm Alkalinity (F) g/m Hardness (as CaCO 3 ) g/m NitrateN (F) g/m NitriteN (F) g/m 3 <0.01 <0.01 < <0.01 AmmonicialN g/m Chloride (F) g/m Sulphate (F) g/m Sulphide (F) g/m 3 < < Settled Solids ml/l Dissolved Metals Aluminium g/m Arsenic g/m 3 <0.02 <0.02 <0.02 <0.02 <0.02 Boron g/m 3 <0.10 <0.10 <0.10 <0.10 <0.10 Cadmium g/m 3 < < < < < Calcium g/m Chromium g/m 3 <0.010 <0.010 <0.010 <0.010 <0.010 Cobalt g/m 3 <0.004 <0.004 <0.004 <0.004 <0.004 Copper g/m 3 <0.010 <0.010 <0.010 <0.010 <0.010 Iron g/m 3 <0.4 <0.4 < Lead g/m 3 <0.002 <0.002 <0.002 <0.002 <0.002 Magnesium g/m Manganese g/m Mercury g/m 3 <0.002 <0.002 <0.002 <0.002 <0.002 Nickel g/m 3 <0.010 <0.010 <0.010 <0.010 <0.010 Potassium g/m 3 <1.0 <1.0 <1.0 <1.0 <1.0 Sodium g/m NZ

6 Page 5 Description Unit Raw Water Upper Waimangaroa 1 Hr 2 Hrs 8 Hrs 18 Hrs Envirolab Ref 10:070/Raw 10:070/1hr 10:070/2hr 10:070/8hr 10:070/18hr Dissolved Organic Carbon Zinc g/m 3 < g/m SVOC # PAHs g/m 3 <0.005 <0.005 <0.005 <0.005 <0.005 Phenols g/m 3 <0.010 <0.010 <0.010 <0.010 <0.010 Analysis parameters indicated with a (F) were filtered prior to. # SVOC (Semi Volatile Organic Compounds) scan includes 78 individual compounds of which all were below detection, please refer to the Hill Laboratories report attached for the full list. Of interest are PAH s (Polycyclic Aromatic Hydrocarbons) and phenols which are potentially present in coal. The remaining compounds listed are typically manufactured compounds. Analyses of metals, SVOC and Dissolved Organic Carbon was performed by Hill Laboratories (report , dated 21 May 2010 attached). Remaining performed by Envirolab. The 8 hr sample for chloride, sulphate and sulphide was contaminated during preparation and discarded. Flocculation Trials Initially the simulated fluid (stock) was placed in the testing beaker and dosed with liquid aluminium sulphate (Alum) at 20 ppm dose rates, mixed at high speed, then reduced to 30 rpm paddle speed for 5 minutes and finally allowed to settle. The degree of floc development and settling was compared visually. Further doses were added to the same testing jar until a reaction was observed. The ph was periodically adjusted with NaOH to approximately ph 6.5 (i.e. the optimum ph for Alum). No significant floc was observed, however settling did appear to occur when compared to the undosed testing beaker at concentrations above 150 ppm Alum. It was decided that Alum was not appropriate to flocculant this material. Upon further literature investigation and advice a nonionic polyacrylate was trialled. The nonionic polyacrylate B600, sourced from Orica, was trialled at a dose rate of 0.5 ppm increasing to 1.0 ppm and 1.5 ppm as per the above experiment. It was discovered that a small floc did form at the lowest dose with no visual improvements between the 0.5 ppm and 1.5 ppm doses. Therefore a full jar testing trial was undertaken using 0.5 ppm dose. NZ

7 Page 6 The following programme was run on a no dose control and one dosed sample. Mixed and dosed samples were stirred for 2 minutes at 200 rpm; Paddle speed reduced to 50 rpm for flocculation development for 10 minutes (at this paddle speed the developed floc remained in suspension); Samples allowed to settle for 20 minutes; Supernatant tested for the parameters as per leaching study (see Table 2). Some of the cations/anions were excluded as they were at low levels in the leaching study. The initial suspended load was measured at 44,000 g/m 3. It should be well noted that this is significantly higher than the leaching trial fluid which was around 2,000 g/m 3. It is likely that the more physical action of the rotary drill/paddle compared to the rocking/rolling table would have contributed to the increase in suspended load. A second test was conducted using a diluted settled supernatant targeting around 2,000 mg/l suspended load, as measured in the leaching trial. The actual resulting suspended solid of this diluted solution was 1,171 g/m 3 ; the results are reported in Table 2. Table 2 Flocculation Study Supernatant Results Description Unit Settled Supernatant No Dose Settled Supernatant 0.5ppm B600 polyacrylate Diluted Settled Supernatant No Dose Diluted Settled Supernatant 0.5ppm B600 polyacrylate Envirolab Ref 10:070/ No Dose 10:070/ 0.5ppm B600 10:070/Dil No Dose 10:070/Dil 0.5ppm B600 ph Conductivity µs/cm OxidationReduction Potential (ORP) mv Dissolved Oxygen % Turbidity NTU Suspended Solids g/m UV 254nm (filtered) cm Dissolved Solids ppm Hardness (as CaCO 3 ) g/m Settled Solids ml/l <1 1 Maximum Floc Developed mm Dissolved Metals Aluminium g/m NZ

8 Page 7 Description Envirolab Ref Dissolved Organic Carbon Unit Settled Supernatant No Dose 10:070/ No Dose Settled Supernatant 0.5ppm B600 polyacrylate 10:070/ 0.5ppm B600 Diluted Settled Supernatant No Dose 10:070/Dil No Dose Diluted Settled Supernatant 0.5ppm B600 polyacrylate 10:070/Dil 0.5ppm B600 Arsenic g/m 3 <0.02 <0.02 Boron g/m 3 <0.10 <0.10 Cadmium g/m 3 < < Calcium g/m Chromium g/m 3 <0.010 <0.010 Cobalt g/m 3 <0.004 <0.004 Copper g/m <0.010 Iron g/m 3 <0.4 <0.4 Lead g/m Magnesium g/m Manganese g/m Mercury g/m 3 <0.002 <0.002 Nickel g/m 3 <0.010 <0.010 Potassium g/m 3 <1.0 <1.0 Sodium g/m Zinc g/m g/m SVOC # PAHs g/m 3 <0.005 <0.005 Phenols g/m 3 <0.010 <0.010 Analyses of metals, SVOC and Dissolved Organic Carbon was performed by Hill Laboratories (report , dated 28 May 2010 attached). Remaining performed by Envirolab. Observations Floc formed within 1 minute of reducing the speed to 50 rpm; The no dose samples retained a high black colour as can be observed in Photos 3 and 4, this was due to a fine opaque suspension; Fine material was observed to float on the surface as well as adhering to the wall of the testing jar during settling; NZ

9 Page 8 Samples with a high suspended load settled more readily than those which were more diluted; The dosed diluted sample settled the large floc within 1 minute, but retained a highly turbid supernatant. In contrast the high suspended load sample took longer to settle (10 minutes) but resulted in a clear supernatant; Photos 3 and 4. The carbonaceous biological oxygen demand of the river water and the high suspended load supernatant fluid was measured at: Water : < 2 go 2 /m 3 CBOD 5 (lab ref 10:070/W); Stock settled supernatant fluid: < 2 go 2 /m 3.CBOD 5 (lab ref 10:070/No Dose). Discussion Please note that IANZ does not endorse the expression of any professional opinion or technical advice under the scope of laboratory accreditation. The results of the leaching trial show no significant chemical contamination from the coal, indicating that the material is relatively inert for the parameters tested (lead was measured in the high suspended load samples from the flocculation trials). However, the suspended load of fine material provides a high amount of black colour in the fluid samples. The UVabsorbance typically indicates dissolved organic species and increasing levels were observed with contact time. However, the dissolved organic carbon levels decreased with increasing contact time and all the SVOC were below detection. Therefore the UVabsorbance levels may not be a correct indication of dissolved organic species. The flocculation trials indicate that a concentration 0.5 ppm of a nonionic polyacrylate aids in the formation of flocs and subsequent settling. It was noted that a clearer supernatant was achieved when a higher initial suspended load was tested when compared to a much lower suspended load being tested. This is likely due to the ionic bonding of the denser medium having more influence on the fine particles. Further investigation may be warranted to aid in the removal of the finer suspension, depending on the actual suspended load of the proposed water requiring treatment. It was found that the black colour produced from the fine coal masked the typical parameters measured for clarity. Photos 3 and 4 shows the level of colour is quite high in the undosed samples, yet the turbidity and suspended solids are not significant different to the clear dosed supernatant (80 NTU compared to 32 NTU, TSS of 88 g/m 3 compared to 72 g/m 3, undosed and dosed respectively). In preparation of the diluted stock solution the TSS was measured at 1,171 g/m 3 and a turbidity of 60 NTU. However, on settling the TSS was reduced to 326 g/m 3 but the turbidity increased to 182 NTU. We believe that the reflective nature of the coal may be responsible, with the light not being absorbed. (Similarly we noted that it proved to be unusually difficult to take photographs due to the mirror effect on the jars). Organic species covers a large number of compounds, SVOC scan only covers a small percentage. The screen detection level was used, a lower detection may also be necessary. NZ

10 Page 9 References Table 2 Summary of Methods Used and Detection Limits Parameter Reference Detection Limit Alkalinity APHA g/m 3 Ammonia APHA 4500NH 3 D 0.01 g/m 3 BOD 5 APHA 5210 B 2.0 g/m 3 Chloride APHA 4500Cl D 0.3 g/m 3 Conductivity APHA µs/cm Nitrate Cadmium reduction APHA 4500NO 3 E 0.01 g/m 3 Nitrite APHA 4500NO g/m 3 ph APHA 4500H + ± 0.02 Sulphate APHA 4500SO 4 2 E 0.5 g/m 3 Sulphide APHA 4500S 2 F 0.4 g/m 3 Suspended Solids APHA 2540 D (GF/C) 3 g/m 3 Turbidity APHA NTU UVAbsorbance APHA 5910 B cm 1 APHA: Standard Methods for the Examination of Water and Wastewater, APHA, AWWA, WEF, 21 st Ed, 2005 Yours sincerely David Steiner Environmental Scientist on behalf of Beca Infrastructure Ltd Direct Dial: david.steiner@beca.com Copy Rob Fullerton, Philip la Roche, Beca NZ

11 Page 10 Photo 1: Settling Leach Trial in Imhoff Cone NZ

12 Page 11 Photo 2: Jar Testing during Floc Development slow mixing Photo 3: High Load Settled Material Flocculation Trial NZ

13 Page 12 Photo 4: Diluted Load Settled Flocculation Trial NZ

14 R J Hill Laboratories Limited 1 Clyde Street Private Bag 3205 Hamilton 3240, New Zealand Tel Fax mail@hilllabs.co.nz Web A N A L Y S I S R E P O R T Page 1 of 4 Client: Beca Infrastructure Limited Contact: Mr D Steiner C/ Beca Infrastructure Limited PO Box 6345 Wellesley Street AUCKLAND 1141 Lab No: Date Registered: Date Reported: Quote No: Order No: Client Reference: Submitted By: May May /300 Mr D Steiner SPv1 Sample Type: Aqueous Individual Tests Dissolved Calcium Dissolved Magnesium Dissolved Mercury Dissolved Potassium Dissolved Sodium Dissolved Cyanide Dissolved Organic Carbon (DOC) Sample Name: Lab Number: Leachate metals suite, dissolved, screen Dissolved Aluminium Dissolved Arsenic Dissolved Boron Dissolved Cadmium Dissolved Chromium Dissolved Cobalt Dissolved Copper Dissolved Iron Dissolved Lead Dissolved Manganese Dissolved Nickel Dissolved Zinc Haloethers in SVOC Water Samples by GCMS Bis(2chloroethoxy) methane Bis(2chloroethyl)ether Bis(2chloroisopropyl)ether 4Bromophenyl phenyl ether 4Chlorophenyl phenyl ether Nitrogen containing compounds in SVOC Water Samples by GCMS Aniline 3,3'Dichlorobenzidine 2,4Dinitrotoluene 2,6Dinitrotoluene Nitrobenzene NNitrosodinpropylamine NNitrosodiphenylamine Organochlorine Pesticides in SVOC Water Samples by GCMS Aldrin alphabhc 10:070/Raw 10:070/1hr 10:070/2hr 10:070/8hr 10:070/18hr 11May May May May May g/m g/m g/m 3 < < < < < g/m 3 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 g/m g/m 3 < < < < < g/m g/m g/m 3 < 0.02 < 0.02 < 0.02 < 0.02 < 0.02 g/m 3 < 0.10 < 0.10 < 0.10 < 0.10 < 0.10 g/m 3 < < < < < g/m 3 < < < < < g/m 3 < 0.4 < 0.4 < g/m 3 < < < < < g/m g/m 3 < g/m 3 < 0.03 < 0.03 < 0.03 < 0.03 < 0.03 This Laboratory is accredited by International Accreditation New Zealand (IANZ), which represents New Zealand in the International Laboratory Accreditation Cooperation (ILAC). Through the ILAC Mutual Recognition Arrangement (ILACMRA) this accreditation is internationally recognised. The tests reported herein have been performed in accordance with the terms of accreditation, with the exception of tests marked *, which are not accredited.

15 Sample Type: Aqueous Sample Name: 10:070/Raw 11May :070/1hr 11May :070/2hr 11May :070/8hr 12May :070/18hr 12May2010 Lab Number: Organochlorine Pesticides in SVOC Water Samples by GCMS betabhc deltabhc gammabhc (Lindane) 4,4'DDD 4,4'DDE 4,4'DDT Dieldrin Endosulfan I Endosulfan II Endosulfan sulphate Endrin Endrin Ketone Heptachlor Heptachlor epoxide Hexachlorobenzene Polycyclic Aromatic Hydrocarbons in SVOC Water Samples by GCMS Acenaphthene Acenaphthylene Anthracene Benzo[a]anthracene Benzo[a]pyrene (BAP) Benzo[b]fluoranthene Benzo[g,h,i]perylene Benzo[k]fluoranthene 2Chloronaphthalene Chrysene Dibenzo[a,h]anthracene Fluoranthene Fluorene Indeno(1,2,3c,d)pyrene 2Methylnaphthalene Naphthalene Phenanthrene Pyrene Phenols in SVOC Water Samples by GCMS 4Chloro3methylphenol 2Chlorophenol 2,4Dichlorophenol 2,4Dimethylphenol 2Methyl4,6dinitrophenol 3 & 4Methylphenol (m + pcresol) 2Methylphenol (ocresol) 2Nitrophenol 4Nitrophenol Pentachlorophenol (PCP) Phenol 2,4,5Trichlorophenol 2,4,6Trichlorophenol Plasticisers in SVOC Water Samples by GCMS Bis(2ethylhexyl)phthalate Butylbenzylphthalate Di(2ethylhexyl)adipate Diethylphthalate Dimethylphthalate Dinbutylphthalate g/m 3 < 0.10 < 0.10 < 0.10 < 0.10 < 0.10 g/m 3 < 0.10 < 0.10 < 0.10 < 0.10 < 0.10 g/m 3 < 0.03 < 0.03 < 0.03 < 0.03 < 0.03 Lab No: v 1 Hill Laboratories Page 2 of 4

16 Sample Type: Aqueous Sample Name: Lab Number: Plasticisers in SVOC Water Samples by GCMS Dinoctylphthalate Other Halogenated compounds in SVOC Water Samples by GCMS 1,2Dichlorobenzene 1,3Dichlorobenzene 1,4Dichlorobenzene Hexachlorobutadiene Hexachlorocyclopentadiene Hexachloroethane 1,2,4Trichlorobenzene Other compounds in SVOC Water Samples by GCMS Benzyl alcohol Carbazole Dibenzofuran Isophorone 10:070/Raw 10:070/1hr 10:070/2hr 10:070/8hr 10:070/18hr 11May May May May May g/m 3 < 0.03 < 0.03 < 0.03 < 0.03 < 0.03 g/m 3 < 0.05 < 0.05 < 0.05 < 0.05 < 0.05 S U M M A R Y O F M E T H O D S The following table(s) gives a brief description of the methods used to conduct the analyses for this job. The detection limits given below are those attainable in a relatively clean matrix. Detection limits may be higher for individual samples should insufficient sample be available, or if the matrix requires that dilutions be performed during. Sample Type: Aqueous Test Method Description Default Detection Limit Samples Leachate metals suite, dissolved, screen 0.45µm filtration, ICPMS, screen level Semivolatile Organic Compounds Screening in Water by GCMS Haloethers in SVOC Water Samples by GCMS Nitrogen containing compounds in SVOC Water Samples by GCMS Organochlorine Pesticides in SVOC Water Samples by GCMS Polycyclic Aromatic Hydrocarbons in SVOC Water Samples by GCMS Phenols in SVOC Water Samples by GCMS Plasticisers in SVOC Water Samples by GCMS Other Halogenated compounds in SVOC Water Samples by GCMS Other compounds in SVOC Water Samples by GCMS SMC Compounds in SVOC Water Samples by GCMS Filtration for Dissolved Cyanide* Liquid/Liquid extraction, GPC cleanup (if required), GCMS FS Liquid/Liquid extraction, GPC cleanup (if required), GCMS FS Liquid/Liquid extraction, GPC cleanup (if required), GCMS FS Liquid/Liquid extraction, GPC cleanup (if required), GCMS FS Liquid/Liquid extraction, GPC cleanup (if required), GCMS FS Liquid/Liquid extraction, GPC cleanup (if required), GCMS FS Liquid/Liquid extraction, GPC cleanup (if required), GCMS FS Liquid/Liquid extraction, GPC cleanup (if required), GCMS FS Liquid/Liquid extraction, GPC cleanup (if required), GCMS FS Liquid/Liquid extraction, GPC cleanup (if required), GCMS FS Sample filtration through 0.45 µm membrane filter and preservation with sodium hydroxide. Dissolved Cyanide Distillation*. Dissolved Calcium Dissolved Magnesium Dissolved Mercury Dissolved Potassium Dissolved Sodium Dissolved Cyanide Dissolved Organic Carbon (DOC) Filtered sample, ICPMS, trace level. APHA 3125 B 21 st ed Filtered sample, ICPMS, screen level. APHA 3125 B 21 st ed Filtered sample, ICPMS, screen level. APHA 3125 B 21 st ed Filtered sample, ICPMS, screen level. APHA 3125 B 21 st ed Filtered sample, ICPMS, screen level. APHA 3125 B 21 st ed Filtered sample, distillation, colorimetry. APHA 4500CN C & E 21 st ed Filtered sample, catalytic oxidation, IR detection. APHA 5310 B 21 st ed g/m g/m g/m g/m g/m g/m g/m Lab No: v 1 Hill Laboratories Page 3 of 4

17 These samples were collected by yourselves (or your agent) and analysed as received at the laboratory. Samples are held at the laboratory after reporting for a length of time depending on the preservation used and the stability of the analytes being tested. Once the storage period is completed the samples are discarded unless otherwise advised by the client. This report must not be reproduced, except in full, without the written consent of the signatory. Carole RodgersCarroll BA, NZCS Client Services Manager Environmental Division Lab No: v 1 Hill Laboratories Page 4 of 4

18 R J Hill Laboratories Limited 1 Clyde Street Private Bag 3205 Hamilton 3240, New Zealand Tel Fax mail@hilllabs.co.nz Web A N A L Y S I S R E P O R T Page 1 of 4 Client: Beca Infrastructure Limited Contact: Mr D Steiner C/ Beca Infrastructure Limited PO Box 6345 Wellesley Street AUCKLAND 1141 Lab No: Date Registered: Date Reported: Quote No: Order No: Client Reference: Submitted By: May May B /300 Mr D Steiner SPv1 Sample Type: Aqueous Individual Tests Dissolved Calcium Dissolved Magnesium Dissolved Mercury Dissolved Potassium Dissolved Sodium Dissolved Cyanide Dissolved Organic Carbon (DOC) Sample Name: Lab Number: Leachate metals suite, dissolved, screen Dissolved Aluminium Dissolved Arsenic Dissolved Boron Dissolved Cadmium Dissolved Chromium Dissolved Cobalt Dissolved Copper Dissolved Iron Dissolved Lead Dissolved Manganese Dissolved Nickel Dissolved Zinc Haloethers in SVOC Water Samples by GCMS Bis(2chloroethoxy) methane Bis(2chloroethyl)ether Bis(2chloroisopropyl)ether 4Bromophenyl phenyl ether 4Chlorophenyl phenyl ether 10:070/No Dose 10:070/0.5ppm 19May2010 B600 19May Nitrogen containing compounds in SVOC Water Samples by GCMS Aniline 3,3'Dichlorobenzidine 2,4Dinitrotoluene 2,6Dinitrotoluene Nitrobenzene NNitrosodinpropylamine NNitrosodiphenylamine Organochlorine Pesticides in SVOC Water Samples by GCMS Aldrin g/m g/m g/m 3 < < g/m 3 < 1.0 < 1.0 g/m g/m 3 < < g/m g/m g/m 3 < 0.02 < 0.02 g/m 3 < 0.10 < 0.10 g/m 3 < < g/m 3 < < g/m < g/m 3 < 0.4 < 0.4 g/m g/m g/m g/m 3 < 0.03 < 0.03 This Laboratory is accredited by International Accreditation New Zealand (IANZ), which represents New Zealand in the International Laboratory Accreditation Cooperation (ILAC). Through the ILAC Mutual Recognition Arrangement (ILACMRA) this accreditation is internationally recognised. The tests reported herein have been performed in accordance with the terms of accreditation, with the exception of tests marked *, which are not accredited.

19 Sample Type: Aqueous Sample Name: 10:070/No Dose 19May :070/0.5ppm B600 19May2010 Lab Number: Organochlorine Pesticides in SVOC Water Samples by GCMS alphabhc betabhc deltabhc gammabhc (Lindane) 4,4'DDD 4,4'DDE 4,4'DDT Dieldrin Endosulfan I Endosulfan II Endosulfan sulphate Endrin Endrin Ketone Heptachlor Heptachlor epoxide Hexachlorobenzene Polycyclic Aromatic Hydrocarbons in SVOC Water Samples by GCMS Acenaphthene Acenaphthylene Anthracene Benzo[a]anthracene Benzo[a]pyrene (BAP) Benzo[b]fluoranthene Benzo[g,h,i]perylene Benzo[k]fluoranthene 2Chloronaphthalene Chrysene Dibenzo[a,h]anthracene Fluoranthene Fluorene Indeno(1,2,3c,d)pyrene 2Methylnaphthalene Naphthalene Phenanthrene Pyrene Phenols in SVOC Water Samples by GCMS 4Chloro3methylphenol 2Chlorophenol 2,4Dichlorophenol 2,4Dimethylphenol 2Methyl4,6dinitrophenol 3 & 4Methylphenol (m + pcresol) 2Methylphenol (ocresol) 2Nitrophenol 4Nitrophenol Pentachlorophenol (PCP) Phenol 2,4,5Trichlorophenol 2,4,6Trichlorophenol Plasticisers in SVOC Water Samples by GCMS Bis(2ethylhexyl)phthalate Butylbenzylphthalate Di(2ethylhexyl)adipate Diethylphthalate g/m 3 < < g/m 3 < < g/m 3 < < g/m 3 < < g/m 3 < < g/m 3 < < g/m 3 < < g/m 3 < < g/m 3 < < g/m 3 < < g/m 3 < < g/m 3 < < g/m 3 < 0.10 < 0.10 g/m 3 < 0.10 < 0.10 g/m 3 < 0.03 < 0.03 Lab No: v 1 Hill Laboratories Page 2 of 4

20 Sample Type: Aqueous Sample Name: Lab Number: Plasticisers in SVOC Water Samples by GCMS Dimethylphthalate Dinbutylphthalate Dinoctylphthalate Other Halogenated compounds in SVOC Water Samples by GCMS 1,2Dichlorobenzene 1,3Dichlorobenzene 1,4Dichlorobenzene Hexachlorobutadiene Hexachlorocyclopentadiene Hexachloroethane 1,2,4Trichlorobenzene Other compounds in SVOC Water Samples by GCMS Benzyl alcohol Carbazole Dibenzofuran Isophorone 10:070/No Dose 10:070/0.5ppm 19May2010 B600 19May g/m 3 < 0.03 < 0.03 g/m 3 < 0.05 < 0.05 S U M M A R Y O F M E T H O D S The following table(s) gives a brief description of the methods used to conduct the analyses for this job. The detection limits given below are those attainable in a relatively clean matrix. Detection limits may be higher for individual samples should insufficient sample be available, or if the matrix requires that dilutions be performed during. Sample Type: Aqueous Test Method Description Default Detection Limit Samples Leachate metals suite, dissolved, screen 0.45µm filtration, ICPMS, screen level Semivolatile Organic Compounds Screening in Water by GCMS Haloethers in SVOC Water Samples by GCMS Nitrogen containing compounds in SVOC Water Samples by GCMS Organochlorine Pesticides in SVOC Water Samples by GCMS Polycyclic Aromatic Hydrocarbons in SVOC Water Samples by GCMS Phenols in SVOC Water Samples by GCMS Plasticisers in SVOC Water Samples by GCMS Other Halogenated compounds in SVOC Water Samples by GCMS Other compounds in SVOC Water Samples by GCMS SMC Compounds in SVOC Water Samples by GCMS Filtration for Dissolved Cyanide* Liquid/Liquid extraction, GPC cleanup (if required), GCMS FS Liquid/Liquid extraction, GPC cleanup (if required), GCMS FS Liquid/Liquid extraction, GPC cleanup (if required), GCMS FS Liquid/Liquid extraction, GPC cleanup (if required), GCMS FS Liquid/Liquid extraction, GPC cleanup (if required), GCMS FS Liquid/Liquid extraction, GPC cleanup (if required), GCMS FS Liquid/Liquid extraction, GPC cleanup (if required), GCMS FS Liquid/Liquid extraction, GPC cleanup (if required), GCMS FS Liquid/Liquid extraction, GPC cleanup (if required), GCMS FS Liquid/Liquid extraction, GPC cleanup (if required), GCMS FS Sample filtration through 0.45 µm membrane filter and preservation with sodium hydroxide. Dissolved Cyanide Distillation*. Dissolved Calcium Dissolved Magnesium Dissolved Mercury Dissolved Potassium Dissolved Sodium Dissolved Cyanide Filtered sample, ICPMS, screen level. APHA 3125 B 21 st ed Filtered sample, ICPMS, screen level. APHA 3125 B 21 st ed Filtered sample, ICPMS, screen level. APHA 3125 B 21 st ed Filtered sample, ICPMS, screen level. APHA 3125 B 21 st ed Filtered sample, ICPMS, screen level. APHA 3125 B 21 st ed Filtered sample, distillation, colorimetry. APHA 4500CN C & E 21 st ed Lab No: v 1 Hill Laboratories Page 3 of g/m g/m g/m g/m g/m g/m

21 Sample Type: Aqueous Test Method Description Default Detection Limit Samples Dissolved Organic Carbon (DOC) Filtered sample, catalytic oxidation, IR detection. APHA 5310 B 21 st ed These samples were collected by yourselves (or your agent) and analysed as received at the laboratory. 0.5 g/m 3 Samples are held at the laboratory after reporting for a length of time depending on the preservation used and the stability of the analytes being tested. Once the storage period is completed the samples are discarded unless otherwise advised by the client. This report must not be reproduced, except in full, without the written consent of the signatory. 12 Graham Corban MSc Tech (Hons) Client Services Manager Environmental Division Lab No: v 1 Hill Laboratories Page 4 of 4

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