THE SAMPLING AND ANALYSIS OF ONE GROUNDWATER AND ONE WASTE WATER TREATMENT PLANT ON BEHALF OF MOTT MACDONALD

Transcription

1 THE SAMPLING AND ANALYSIS OF ONE GROUNDWATER AND ONE WASTE WATER AT THE KILKENNY CITY WASTE WATER TREATMENT PLANT ON BEHALF OF MOTT MACDONALD For the Attention of: Mr. Mark McCarthy Environmental Scientist Environment Division Ireland Limited South Block Rockfield Dundrum Dublin 16 Prepared by: Mr. Peter Coogan Monitoring Team Leader Reviewed by: Linda Lenihan Environmental Scientist Report No: ECS3638 Monitoring Date: May 2010 Reporting Date: This report shall not be reproduced except in full, without the approval of Bord na Móna Technical Services. All queries concerning the report or its contents should be forwarded to the Monitoring Team leader.

2 Executive Summary Bord na Móna Technical Services were commissioned by to perform the sampling and analysis of one groundwater (GW-1) and one discharge waste water sample (SW- 1) at the Kilkenny City, Purcellsinch, Waste Water Treatment Plant (WWTP). The site was subsequently visited by a Bord na Móna Environmental Scientist on the 20 th of May 2010 to carry out the once off Groundwater and Waste Water monitoring event. Ground Water and Waste Water samples were collected and returned to the laboratory for analysis. This report presents details of the monitoring, sampling and analytical methodologies carried out and the results obtained. A total of two samples were extracted, one from the waste water discharge outlet from the Kilkenny City, Purcellsinch, Waste Water Treatment Plant and the second sample from a borehole located to the right of the WWTP entrance in a green field area. This report is certified as accurate and representative of the sampling and associated analysis carried out. Respectively Submitted, Ms. Linda Lenihan Environmental Scientist Mr. Peter Coogan Monitoring Team Leader Bord na Móna, Technical Services Page 2

3 CONTENTS 1.0 INTRODUCTION 2.0 METHODOLOGY 2.1 Sampling Locations 2.2 Groundwater Sampling 2.3 Waste Water Sampling 2.4 Analysis 3.0 COMMITMENT TO QUALITY 3.1 INAB Accreditation 3.2 Interlaboratory Proficiency Schemes 3.3 Controlled Chain of Custody 4.0 RESULTS Bord na Móna, Technical Services Page 3

4 1.0 INTRODUCTION Bord na Mona Technical Services was commissioned by Mr. Mark McCarthy of Mott MacDonald to provide Groundwater and Waste Water sampling and analysis at the Kilkenny City, Purcellsinch, Waste Water Treatment Plant (WWTP). The site was visited by a Bord na Móna Environmental Scientist on the 20 th of May 2010 to conduct the following; - Purge and sample the borehole located to the right of the WWTP entrance in a Greenfield area. - Extract a grab sample of waste water from the discharge of the WWTP and return to the Bord na Mona laboratory for subsequent analysis. - Analyse the samples for parameters listed in Table Report all field measurements and results. This report details the sampling methodologies and procedures followed. Bord na Móna, Technical Services Page 4

5 2.0 METHODOLOGY 2.1 Sample Locations Sample ID Sample Description Description GW-1 Groundwater Groundwater monitoring borehole located in green field right of the WWTP entrance SW-1 Waste Water Discharge from WWTP 2.2 Groundwater Sampling Groundwaters were extracted in accordance with the following recognised standards; ISO Standard Description ISO Guidance on the design of sampling programmes and sampling techniques ISO ISO ISO Guidance on sample preservation and handling Guidance on quality assurance of environmental sampling & handling Guidance on sampling groundwaters Groundwater in the well casing and in close proximity to the well is not considered representative of the general groundwater at a given location. In order to ensure that the groundwater samples extracted from the monitoring bores are representative of the water held in the subsurface strata and not water held stagnant in the borehole casing, it was necessary to evacuate the monitoring bores prior to sampling. A common procedure is to pump a well until between 3 and 6 bore volumes have been removed as cited in Bord na Móna Technical Services Standard of Field Protocols (SOP TS-W-01) and as recommended in numerous technical publications (e.g. Marsh and Lloyd 1980 and Boateng 1987). The purged volumes were calculated on-site from the measured static water levels (measured using an electronic well dipper) and the total depth of the bores. In order to ensure the efficiency of the evacuation procedure, the temperature and conductivity of the extracted water were continually monitored. Evacuation is deemed to be complete on Bord na Móna, Technical Services Page 5

6 stabilisation of both parameters. Therefore samples were extracted for both non-volatile and volatile organic analysis from the monitoring wells after purging the required volumes from each of the monitoring boreholes and on stabilisation of the parameters outlined above. The "Waterra inertial lift pump" system was used to evacuate the monitoring borehole. The system comprises of three main components: a. Submersible Pump b. Riser tubing (HDPE or Teflon) The required length of tubing is cut so as to allow a 1m excess above the top of the well casing. A submersible pump is fitted to the bottom of the tubing and inserted into the bore to the required depth. A discharge rate of 5-10 litres min -1 is achieved using the system described. Micro biological sampling was conducted using a sterile Waterra Teflon bailer which is lowered into the borehole so as to minimise the disturbance of the water in the borehole column. Traditional methods used for the sampling of organics include the use of Waterra Teflon bailers or various forms of vacuum pumps The methodology for sampling of the boreholes for organics are as follows: (i) A 1m long narrow diameter Waterra organic sampling bailer is inserted (2 to 5 m) into the wider diameter riser tubing. (ii) (v) (vi) Samples from the narrow bore tubing are filled directly into a 100 ml amber conditioned bottle with a PTFE stoppered lid. The sampling bottles are brim filled. Separate VOC sampling tubes are used at each monitoring borehole. Samples are taken in 1 litre polypropylene containers (inorganic) and 100ml PTFE capped glass bottles (organic), returned to the laboratory for immediate analysis. All samples were returned to the laboratory, and stored between 1-8 C. Bord na Móna, Technical Services Page 6

7 2.3 Waste Water Sampling Grab samples of waste water were extracted in accordance with the following standards; ISO Standard ISO ISO ISO ISO ISO Description Guidance on the design of sampling programmes and sampling techniques Guidance on sample preservation and handling Guidance on quality assurance of environmental sampling & handling Guidance on sampling wastewaters Guidance on sampling rivers & streams Sampling is conducted in strict accordance with Bord na Móna Technical Services recognised Standard Operations Procedures (SOP) TS-W-02. All samples were returned to the laboratory, and stored between 1-8 C. Subsequent analysis was carried out in strict accordance with recognised standard methods as detailed in Table 2.4 overleaf. Bord na Móna, Technical Services Page 7

8 2.4 Analysis TABLE 2.4: PARAMETERS AND LIMITS OF DETECTION FOR SAMPLES Parameter Method of Analysis Limit of Detection Anions Total Alkalinity (Carbonates/Bicar bonates) Total Hardness (Carbonates/Bicar bonates) Ammonia G/67 Konelab based on APHA 21 st Edition 2005 Ortho-P method PE Ascorbic acid, Nitrate/Nitrite/TON-method 4500-NO2B Colorimetric method, Chloride-method 4500 Cl-E Ferricyanide Method G/69 Konelab based on APHA st Edition Method 2320 and determination of alkalinity and acidity in water 1981 Method C G/68 Konelab based on APHA st Edition G/67 Konelab Based on APHA, 2005, 21st Edition, 2005-NH3 Phenate Method and the methods for the examination of waters and assoc materials ammonia in waters 1981 <0.2mg/l NO 3 -N <0.01 mg/l PO 4 -P <0.02mg/l NO 2 -N <2 mg/l Cl Volume of Sample Required 50mls Sample Container Plastic <50mg/l 50mls Plastic <50mg/l 50mls Plastic <0.02 mg/l 120mls Plastic/Glass Ammonium Calculation <0.02 mg/l COD ph Total Dissolved Solids Total Suspended Solids *Total Solids Total Phosphorus *Oils, Fats & Greases Anions (IC) G/03 Based on APHA, 2005, 21st Edition, 5220D, Closed Reflux, colourimetric Method. G/05: Based on APHA,2005, 21st Edition, Method 4500 H+B. G/18 Based on APHA 2005, 21st Edition, 2540C. G/19Based on APHA 2005, 21st Edition, 2540D. G/65 Based on APHA 21st Edition 2005, Method 2540B (G/74)Persulphate digest followed by colourimetric analysis based on APHA, st Edition, Method 4500-PB & Hach Method 8190 G/32Based on APHA, 2005, 21st Edition, Method 5520B G/39: Based on APHA, 2005, 21st Edition, Method 4110B. <10 mg/l COD 20mls Plastic/Glass - 50mls Plastic/Glass 50 mg/l dried residue 150mls Plastic/Glass <5 mg/l dried residue 500mls Plastic/Glass <50 mg/l 50mls Plastic/Glass <0.05 mg/l TP 150mls Plastic/Glass <1 mg/l mls Glass <0.1 mg/l F <0.5 mg/l Cl <0.05 mg/l NO 3 -N <0.16 mg/l PO 4 -P 30mls Plastic/Glass *Colour *Turbidity G/53 Based on APHA 21st Edition 2005 Method 2120 B G/54 Based on APHA 21st Edition- 2005, 2130A <0.5 mg/l SO 4 <5 PtCo unit 100mls Plastic/Glass <1 NTU 100mls Plastic/Glass Bord na Móna, Technical Services Page 8

9 Table 2.4 Continued: Analytical Methodology Parameter Method of Analysis Limit of Detection Volume of Sample Sample Container Required *Heavy Metals based on EPA method (supplement 1, Rev5.4 May 1994)ICP-MS Fe <0.1mg/l Others: <2µg/l 100mls plastic * Ca, Na, Mg, K G/57 ICP-MS based on EPA method (supplement 1, Rev5.4 May 1994) <0.1 mg/l 100mls Plastic *Total Chlorine G/107 In House Method (DR/2000-Direct Reading Spectrophotometer <0.5 mg/l 100mls Amber bleach conditioned Glass *TOC G/94 TOC Analyser <1mg/l 20mls Glass GC-FID scan (Methanol, Ethanol, G/14 Based on ASTM Conditioned <0.5 mg/l 50mls Acetone, IPA, Acetonitrile) Method D3695. glass *USEPA list (volatile organic compounds) G/43 based on USEPA Conditioned <10µg/l 100mls See Appendix 1 for list of Rev 3 glass compounds Based on IDEXXs patented ** TVC (at 22 and 37oC) (TVC) Sterile Defined Substrate <1 CFU/ml 250mls Container Technology **Langelier Saturation Index Calculation **Chloramine Colorimetry/GCMS <0.05mg/l 1000mls Glass **Chlorine (Total and Free) Colorimetry <0.05mg/l 250mls Glass **Chlorine/Bromine (Total) Colorimetry <0.05mg/l 250mls Glass **Silt Density Index Calculation 0 sdi index 2000mls Plastic **Strontium ICPMS <1mg/l 100mls Plastic/Glass **Sulphides Titrimetry <0.010mg/l 100mls Plastic/Glass **Silica (total) Colorimetry <1mg/l as si 100mls Plastic/Glass **Hydrogen Suphide GC Headspace <0.5 µg/l 125mls Plastic/Glass **Carbon Dioxide Titrimetry <1mg/l 50m1s Plastic/Glass **Endotoxins LAL method <0.01 Eu/ml 30mls Sterile Container Note 1: Awaiting methods and limits of detechion from subcontracted test APHA - American Public Health Association, Standard Methods for the Examination of Waters and Wastewaters, 21st Edition, ASTM - American Society for Testing Materials, Annual Book of ASTM Standards 1997 G - Bord na Móna Environmental Technical Services Analytical Laboratory Standard Operating Procedures Manual * - Non-INAB accredited method ** - Subcontracted analysis < = Less than Bord na Móna, Technical Services Page 9

10 3.0 COMMITMENT TO QUALITY 3.1 INAB Accreditation Bord na Móna Technical Services analytical laboratories is accredited to ISO by the National Accreditation Board (INAB). ISO accreditation ensures that the laboratory operates a quality system with technically competent staff. The laboratory has accreditation since 1997 and it is the policy of the laboratory to achieve and maintain a high standard of quality consistent with client's requirements in all aspects of the work carried out within the laboratory. 3.2 Interlaboratory Proficiency Schemes To ensure the accuracy of the analytical testing the laboratory participates in several external proficiency schemes. The ongoing competence of the laboratory and its staff is assessed by participation in various inter-laboratory proficiency testing schemes, such as LGC Aquacheck scheme and the EPA Intercalibration programme organised for environmental laboratories throughout Ireland. Bord na Móna Technical & Laboratory Services is listed on the EPAs register of Quality Controlled Laboratories 3.3 Control Chain of Custody As part of the Quality System in place in Bord na Móna Technical Services, measures are taken to ensure controlled chain of custody. An outline of the chain of custody is given below. Bord na Móna, Technical Services Page 10

11 CONTROLLED CHAIN OF CUSTODY SITE TRANSPORT LABORATORY Sampling and packaging of all samples were carried out by Bord na Móna: Technical Team. Mr. Peter Coogan Transport Document Form Transport to laboratory by Bord na Móna Technical Team. Sample Reception Form Receiving of samples at Bord na Móna Environmental Laboratory complex by: Laboratory Manager (Secure laboratory complex access to authorised personnel only) Storage of all samples for 1 month period after report issue. Supervised Disposal Bord na Móna, Technical Services Page 11

12 RESULTS The results of the investigation carried out by Bord na Móna Technical Services are presented as follows: Table 4.1: Table 4.2: Table 4.3: Table 4.4: Table 4.5: Table 4.6: Table 4.7: Table 4.8: Table 4.9: Table 4.10: Table 4.11: Table 4.12: Table 4.13: Results of Field Measurements taken at each sampling location Sample description and observations Results of field measurements taken at the GW-1 monitoring borehole Results of chemical Analysis Results of chemical Analysis Continued Results of Microbiological Analysis Results of analysis of Non-Purgeable Organics Results of Groundwater Cations analysis Result of Groundwater Metal Analysis Results of Waste Water Cations analysis Result of Waste Water Metal Analysis Results of VOCs Analysed for as per USEPA at GW-1 Results of VOCs Analysed for as per USEPA at SW-1 TABLE 4.1: RESULTS OF FIELD MEASUREMENTS TAKEN AT THE GW-1 GROUNDWATER MONITORING BOREHOLE Borehole ID Total Depth (m) Static Water Level (m) Diameter of Pipe Volume Evacuated (L) GW mm 1,600 Note: all measurement taken from top of casing Final Drawdown (M) 5.35 (Instant recharge) TABLE 4.2: SAMPLE DISCRIPTION AND OBSERVATION Borehole ID Colour Odour Suspended Solids Oily Surface Silt GW-1 Clear None None None None SW-1 Pale to clear Very Slight Odour None None None Bord na Móna, Technical Services Page 12

13 TABLE 4.3: RESULTS OF FIELD MEASUREMENTS TAKEN AT THE GW-1 GROUNDWATER MONITORING BOREHOLE Volume Conductivity Temperature (L) (µs/cm) ( o C) , , , , , , , , , , , , , Bord na Móna, Technical Services Page 13

14 TABLE 4.4: RESULTS OF CHEMICAL ANALYSIS Parameter Unit GW-1 SW-1 GTV Note1 ph ph units Conductivity µs/cm ,875 COD mg/l < Suspended Solids mg/l <5 6 - Total Dissolved Solids Total Organic Carbon mg/l Note 2 mg/l <5 7 No Abnormal Total Solids mg/l Total Alkalinity (mg/l) CaCO Change No Abnormal Change Total Hardness (mg/l) CaCO Note 2 Colour (True) PtCo unit No Abnormal Turbidity mg/l <1 <1 - Turbidity (Variance) % Change Ammonia (NH3-N) mg/l < * Ammonium mg/l < Ortho- phosphate mg/l < Note 2 Nitrite-N mg/l <0.03 < * Nitrate-N mg/l * Chloride mg/l Sulphate mg/l Fluoride mg/l Note 2 Oils Fats & Greases mg/l Please note that limits are on specified for groundwater results only Note 1: GTV = Groundwater Threshold Values refers to "European Communities Environmental Objectives (Groundwater) Regulations, 2010 (S.I. No. 9 of 2010)". "Threshold Values" have been established for pollutants that are causing a risk to groundwater bodies. Exceedance of a relevant threshold value at a representative monitoring point triggers further investigation to confirm whether the criteria for poor groundwater chemical status are being met. Note 2: Guide Values refers to EPA Guideline Values for the Protection of Groundwater in Ireland, IGV = Interim Guideline Value. Note these standards are presented for guideline purposes only, therefore, due care should be exercised in cross-referencing these standards with the groundwater results obtained * Converted GTV for Ammonia as N mg/l, Nitrate as N mg/l and Nitrite as N mg/l. < Indicates less than the laboratory detection limit Bord na Móna, Technical Services Page 14

15 TABLE 4.5: RESULTS OF CHEMICAL ANALYSIS CONTINUED Parameter Unit GW-1 SW-1 GTV Note1 Total Silica** mg/l as Si No Abnormal Change Carbon Dioxide** mg/l Langlier Saturation Index** Chlorine (Total Residual)** Chlorine (Free Residual)** Langlier Index mg/l <0.05 < mg/l <0.05 < Strontium** µg/l Sulphide** mg/l As S2 <0.010 < Silt Density Index** SDI Index 3.76 >5 - Hydrogen Sulphide** µ g/l <0.5 <0.5 - Bromine** mg/l <0.01 < Mono- Chloroamine** mg/l <0.05 < Dichloroamine** mg/l <0.05 < Trichloroamine** mg/l <0.05 < Endotoxins** eu/ml >0.25 > TABLE 4.6: RESULTS OF MICROBIOLOGICAL ANALYSIS Parameter Unit GW-1 SW-1 GTV Note1 Total Viable Count 3 days 22 o C** cfu/ml 5 >300 0 Counts Total Viable Count 3 days 37 o C** cfu/ml 0 >300 0 Counts TABLE 4.7: RESULTS OF ANALYSIS FOR NON-PURGEABLE ORGANICS Parameter Unit GW-1 SW-1 GTV Note1 Methanol mg/l <0.5 <0.5 - Ethanol mg/l <0.5 <0.5 - Acetone mg/l <0.5 <0.5 - Acetonitrile mg/l <0.5 <0.5 - Isopropanol mg/l <0.5 <0.5 - Please note that limits are on specified for groundwater results only Note 1: GTV = Groundwater Threshold Values refers to "European Communities Environmental Objectives (Groundwater) Regulations, 2010 (S.I. No. 9 of 2010)". "Threshold Values" have been established for pollutants that are causing a risk to groundwater bodies. Exceedance of a relevant threshold value at a representative monitoring point triggers further investigation to confirm whether the criteria for poor groundwater chemical status are being met. ** Sub-contracted Teast < Indicates less than the laboratory detection limit Bord na Móna, Technical Services Page 15

16 Indicates bacteria to numerous to count or greater than TABLE 4.8: RESULTS OF GROUNDWATER CATION ANALYSIS Parameter Unit GW-1 (Total) GW-1 Dissolved) GTV Note1 Sodium mg/l Potassium mg/l Note 2 Calcium mg/l Note 2 Magnesium mg/l Note 2 TABLE 4.9: RESULTS OF GROUNDWATER METAL ANALYSIS Parameter Unit GW-1 (Total) GW-1 Dissolved) GTV Note1 Aluminium µg/l <2 <2 150 Manganese µg/l Note 2 Copper µg/l <2 <2 1,500 Barium µg/l Note 2 Iron mg/l <0.1 < Note 2 TABLE 4.10: RESULTS OF WASTE WATER CATION ANALYSIS Parameter Unit SW-1 (Total) SW-1 (Dissolved) Sodium mg/l Potassium mg/l Calcium mg/l Magnesium mg/l TABLE 4.11: RESULTS OF WASTE WATER METAL ANALYSIS Parameter Unit SW-1 (Total) SW-1 (Dissolved) Aluminium µg/l Manganese µg/l 9 8 Copper µg/l 10 6 Barium µg/l Iron mg/l <0.1 <0.1 Please note that limits are on specified for groundwater results only Note 1: GTV = Groundwater Threshold Values refers to "European Communities Environmental Objectives (Groundwater) Regulations, 2010 (S.I. No. 9 of 2010)". "Threshold Values" have been established for pollutants that are causing a risk to groundwater bodies. Exceedance of a relevant threshold value at a representative monitoring point triggers further investigation to confirm whether the criteria for poor groundwater chemical status are being met. Note 2: Guide Values refers to EPA Guideline Values for the Protection of Groundwater in Ireland, IGV = Interim Guideline Value. Note these standards are presented for guideline purposes only, therefore, due care should be exercised in cross-referencing these standards with the groundwater results obtained * Converted GTV for Ammonia as N mg/l, Nitrate as N mg/l and Nitrite as N mg/l. < Indicates less than the laboratory detection limit Bord na Móna, Technical Services Page 16

17 TABLE 4.12: 4.13: Results of VOCs Analysed for as per USEPA at GW-1 SW-1 Component Result (µg/l) Component Result (µg/l) Dichlorodifluoromethane <10 Isopropylbenzene <10 Chloromethane <10 n-propylbenzene <10 Vinyl chloride <10 2-Chlorotoluene <10 Bromomethane <10 4-Chlorotoluene <10 Chloroethane <10 1,2,4-Trimethylbenzene <10 1,1-Dichloroethene <10 4-Isopropyltoluene <10 Dichloromethane <10 1,4-Dichlorobenzene <10 trans-1,2-dichloroethene <10 1,2-Dichlorobenzene <10 1,1-Dichloroethane <10 Naphthalene <10 2,2-Dichloropropane <10 1,3-Dichloropropane <10 Bromochloromethane <10 cis-1,3- Dichloropropene <10 Chloroform <10 trans-1,3- Dichloropropene <10 1,1,1-Trichloroethane <10 Dibromochloromethane <10 Carbon Tetrachloride <10 Chlorobenzene <10 1,1-Dichloropropene <10 Ethyl Benzene <10 Benzene <10 o-xylene <10 1,2-Dichloroethane <10 Bromoform <10 1,2-Dichloropropane <10 1,2,3-Trichloropropane <10 Dibromomethane <10 Bromobenzene <10 Bromodichloromethane <10 Tert-Butylbenzene <10 Toluene <10 Sec-Butylbenzene <10 1,1,2-Trichloroethane <10 1,3,5-Trimethylbenzene <10 1,2-Dibromoethane <10 1,2- Dibromo-3 chloropropane <10 1,1,1,2-Tetrachloroethane <10 Hexachlorobutadiene <10 m,p-xylene <10 1,2,3-Trichlorobenzene <10 Tetrachloroethene <10 1,3-Dichlorobenzene <10 n-butylbenzene <10 1,2,4-Trichlorobenzene <10 Trichlorofluoromethane <10 Cis-1,2-Dichloroethene <10 Styrene <10 Bord na Móna, Technical Services Page 17