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 simple matrix. Detection limits may be higher for individual samples should insufficient sample be available, or if the matrix requires that dilutions be performed during analysis. A detection limit range indicates the lowest and highest detection limits in the associated suite of analytes. A full listing of compounds and detection limits are available from the laboratory upon request. Unless otherwise indicated, analyses were performed at Hill Laboratories, 28 Duke Street, Frankton, Hamilton 3204. Summary of Methods Sample Type: Aqueous Test Method Description Default Detection Limit Sample No 1-3 Heavy metals, dissolved, trace As,Cd,Cr,Cu,Ni,Pb,Zn 0.45µm Filtration, ICP-MS, trace level. APHA 3125 B 23rd ed. 2017. 0.00005 - 0.0010 g/m3 1-3 Filtration, Unpreserved Sample filtration through 0.45µm membrane filter. - 1-3 pH pH meter. APHA 4500-H+ B 23rd ed. 2017. Note: It is not possible to achieve the APHA Maximum Storage Recommendation for this test (15 min) when samples are analysed upon receipt at the laboratory, and not in the field. Samples and Standards are analysed at an equivalent laboratory temperature (typically 18 to 22 °C). Temperature compensation is used. 0.1 pH Units 1-3 Acidity (pH 3.7) Titration to pH 3.7 with s tandard sodium hydroxide solution, bromophenol blue indicator. APHA 2310 B 23 rd ed. 2017. 1.0 g/m3 as CaCO3 1-3 Total Alkalinity Titration to pH 4.5 (M-alkalinity), autotitrator. APHA 2320 B (modified for Alkalinity <20) 23rd ed. 2017. 1.0 g/m3 as CaCO3 1-3 Electrical Conductivity (EC) Conductivity meter, 25°C. APHA 2510 B 23rd ed. 2017. 0.1 mS/m 1-3 Dissolved Aluminium Filtered sample, ICP-MS, trace level. APHA 3125 B 23 rd ed. 2017. 0.003 g/m3 1-3 Dissolved Antimony Filtered sample, ICP-MS, trace level. APHA 3125 B 23rd ed. 2017. 0.0002 g/m3 1-3 Dissolved Barium Filtered sample, ICP-MS, trace level. APHA 3125 B 23rd ed. 2017. 0.005 g/m3 1-3 Dissolved Calcium Filtered sample, ICP-MS, trace level. APHA 3125 B 23 rd ed. 2017. 0.05 g/m3 1-3 Dissolved Cobalt Filtered sample, ICP-MS, trace level. APHA 3125 B 23rd ed. 2017. 0.0002 g/m3 1-3 Dissolved Iron Filtered sample, ICP-MS, trace level. APHA 3125 B 23 rd ed. 2017. 0.02 g/m3 1-3 Dissolved Magnesium Filtered sample, ICP-MS, trace level. APHA 3125 B 23 rd ed. 2017. 0.02 g/m3 1-3 Dissolved Manganese Filtered sample, ICP-MS, trace level. APHA 3125 B 23rd ed. 2017. 0.0005 g/m3 1-3 Dissolved Mercury 0.45µm f iltration, bromine oxidation followed by atomic fluorescence. US EPA Method 245.7, Feb 2005. 0.00008 g/m3 1-3 Dissolved Molybdenum Filtered sample, ICP-MS, trace level. APHA 3125 B 23 rd ed. 2017. 0.0002 g/m3 1-3 Dissolved Potassium Filtered sample, ICP-MS, trace level. APHA 3125 B 23rd ed. 2017. 0.05 g/m3 1-3 Dissolved Selenium Filtered sample, ICP-MS, trace level. APHA 3125 B 23 rd ed. 2017. 0.0010 g/m3 1-3 Dissolved Silver Filtered sample, ICP-MS, trace level. APHA 3125 B 23rd ed. 2017. 0.00010 g/m3 1-3 Dissolved Sodium Filtered sample, ICP-MS, trace level. APHA 3125 B 23rd ed. 2017. 0.02 g/m3 1-3 Dissolved Strontium Filtered sample, ICP-MS, trace level. APHA 3125 B 23 rd ed. 2017. 0.0005 g/m3 1-3 Dissolved Uranium Filtered sample, ICP-MS, trace level. APHA 3125 B 23rd ed. 2017. 0.00002 g/m3 1-3 Dissolved Vanadium Filtered sample, ICP-MS, trace level. APHA 3125 B 23rd ed. 2017. 0.0010 g/m3 1-3 Sulphate Filtered sample. Ion Chromatography. APHA 4110 B (modified) 23rd ed. 2017. 0.5 g/m3 Lab No: 2773857-SUPv1 Hill Laboratories Page 2 of 3
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