Quantification of Contaminated Materials on the East Tip Head and former Steelworks Site at Haulbowline, Ringaskiddy, Co Cork.

Transcription

1 Quantification of Contaminated Materials on the East Tip Head and former Steelworks Site at Haulbowline, Ringaskiddy, Co Cork. Interim Report 2 nd July 2008 Main St, Ballyporeen, Co Tipperary, Tel Fax info@nrge.ie

2 NRGE Ltd was engaged to attempt to quantify the level of surface contamination on the Steelworks site and on the East Tip Head at the former Irish Steel Site at Haulbowline, Ringaskiddy, Co Cork. Background Steel Production at the Haulbowline site ceased in September Eastwood Demolition were awarded the Contract to demolish the superstructures on the Steelworks site and carried out the work in Hammond Lane Ltd in association with CTO Environmental Services Ltd and Louis J O Regan Ltd commenced Surface Cleanup in October 2007 on designated Areas within the Steelworks site and site on the adjacent East Tip Head. NRGE Ltd was requested in February 2008 to inspect the site and suggest a methodology to quantify the Hazardous material on the site. NRGE Ltd was engaged by CTO Environmental Services Ltd to quantify the level of contamination on site requiring recovery off site. Scope of the Work Investigation of the site commenced on 2 nd May 2008 and was limited to areas identified on the 1:100 Scale map of the site as A & B in the former steelworks site and T1,T2, and T3 the east tip head on. A review of previous investigations available, review of Published Articles, discussions with former employees and excavate trial pits. Samples from the trial pits to be analysed for a broad spectrum of elements. Survey the site. Relate the all the data from the above.

3 Site Condition The superstructures on the site have been demolished on the steelworks site, sections of the protruding concrete Stanchions were crushed, screened and used to fill the pits in the Furnace area. Contaminated materials were exported off site. Oil Channels in the area formerly the Roller Mills were cleaned of sediment and mill scale, collected oils recovered off site. The integrity of the concrete in the channels is compromised as there are large expansion joints with screeds/timber in situ, there was also cracked and broken concrete sections exposing the base layers under the concrete. The east Tip Head is made up ground consisting predominantly of steel slag, furnace dust and refractory linings. Delineated areas are predominantly level with a high stockpile at the eastern extremity. A stock pile area created to allow the materials to be riddle screened and to process before the vibrating screener towards the north end of the site. Scrap Metal is present along the shore line at the northern bounds. There is no evidence of a barrier between the water body in the harbour and the slag piles. Significant quantities of scrap metal are comingled with the slag and refractory throughout the site. There was a pond in Area T1 approximately 4000m 2 ; this had been excavated to a depth of 4.0m. The pond was excavated when an excavator became bogged down in the soft ground. Excavations of the area revealed a series formed Cells consisting of refractory and slag perimeters and black soft fine materials inside most likely foundry dust. On the East Tip Head has there were 3 excavators with griddle buckets sorting large scrap iron and large size slag lumps. The fine fraction was then passed through a vibrating screener with a picking line to manually remove finer fraction scrap metal which passed the griddle buckets.

4 Method of Assessing the Material Each of the of the 3 delineated areas of the East Tip Head were set out in a grid at 30m intervals in a North South Orientation with a grid line identification Letter. Trial Holes were excavated using a 30 tonne hydraulic excavator, each hole was given an assigned Number along the grid line. The profile of each trial hole was logged. Samples were taken from the sides of each trail pit and sent for analysis. Excavation of the holes was difficult and it was necessary to use a ripper shank on the excavator to loosen the ground at approximately 600mm intervals. The delineated site was surveyed and the spot levels related to Malin Datum. The locations of the samples and the analysis of the samples were taken were then correlated to the datum. The Steel mill area was also surveyed and levelled, large sections of the concrete was clean at the time and the concrete in these areas was examined particularly in the areas that were used as oil collection channels in the rolling mill area. The integrity of these channels was inspected. 8 No Dust Gauges were erected on the site (4 on the East Tip Head and 4 on the Steel Processing Site). The analysis of these Dust monitors will not be available for 3 to 4 weeks.

5 Results Analysis for Sulphur, Cyanide, Tricyanate, Phenols, Antimony, Arsenic, Barium, Cadmium, Chromium, Copper, Lead, Manganese, Mercury, Molybdenum, Nickel, Selenium, Vanadium, Zinc, MTBE, BTEX, PCB Congeners, TPH Aliphatic/Aromatic (C6-C36) Dioxins, Asbestos. Samples of both leachable and Soil Samples were analysed. Summery Analysis Charts are included in Appendix A Attached with the limit from the samples in excess of the limits highlighted. It is noteworthy that of the all the samples analysed exceed the Hazardous Landfill Limits L/S= 10 l/kg of Metals included in the Landfill Directive with some elements up to 200 times the limit value. Maximum Values from SI 148/98 Maximum Values for Concentrations of Heavy Metals in Soil are significantly lower than those found on the east tip head as demonstrated in the chart below. Parameters Maximum Values mg/kg Values from East Tip Head mg/kg Expression of Results Cadmium to 11.7 mg/kg of dry matter in a representative sample, Copper to 2350 Nickel to 443 Lead to 1420 Zinc to Mercury 1 < Level of Detection to 6.6 The results are significantly in excess of the Maximum values for concentrations of Heavy Metals in Soils from SI 148/98 therefore the samples all can be considered Hazardous. It is noted that the EPA have used the Threshold Concentration values from SI 148/98 in the assessment of metals contamination at Silvermines, Co. Tipperary. Our observations of the Northern Shore line establishes that there is not any impervious barrier between the shore line and the made ground. Land fill Directive 2003/33 sets the Barrier Permeability and thickness for containment in landfill applications as follows. Hazardous K < 1.0x10-9 Thickness >5m Non Hazardous K < 1.0x10-9 Thickness >1m Inert K < 1.0x10-7 Thickness >1m.

6 Interaction between the tide and the made ground on the East Tip Head coupled with the concentrations of leachable heavy metal elements it is reasonable to conclude that these are being carried into Cork harbour with tidal action and from the backwash of vessels in the nearby shipping channel. Total Petroleum Hydrocarbon analysis is also included in Appendix A Pages 7-9. Samples where the result are in excess of the Serious Risk Concentrations SRC to human health from the Dutch Ministry for Housing Spatial Planning and the Environment, these are highlighted. The majority of the samples exceed at least one of these parameters PCB and Dioxin Analysis of both the Solid Samples and the Leached Samples are also tabulated with the results in excess of the Serious Risk Concentrations SRC to human health from the Dutch Ministry for Housing Spatial Planning and the Environment, highlighted. The highest concentrations of PCBs found is in the area where a large number of ICBs were removed in A significant portion of the hazardous material is contained in smaller size particles, therefore screening out the finer materials would be the most appropriate method of removal of the hazardous materials from the site. A second significant source of contamination is the integrity of the oil drainage channels in the former rolling mill area. In our opinion the integrity of these channels are compromised. This resulted in significant hydrocarbon discharge under the concrete.

7 Quantify Hazardous Material to be moved off site. A significant portion of the hazardous material is contained smaller size particles therefore screening out the finer materials would be the most appropriate method of removal of the hazardous materials from the site. We estimate the quantities of materials to be recovered off site would be approximately in the delineated Areas would be in the order of 280,000 tonnes as per the schedule below Location TI T2 T3 60% Screenings ( Tonnes) 131,00 70,500 79,000 Additional areas of hydrocarbon contamination under the Roller Mills would be Location Area Under Roller Mills 60% Screenings 416,000 Areas in the East Tip and South Tipp would be in the order of 500,000 tonnes

8 References: Final Report of Expert Group for Silvermines County Tipperary. Lead and Other Relevant Metals Office of Environmental Enforcement, Environmental Protection Agency, ISBN /04/500 THE SIGNIFICANCE OF HEAVY METAL AND ORGANIC MICROPOLLUTANTS IN SOILS Teagasc ISBN Dioxin Levels in the Irish Environment Third Assessment 2004 Environmental Protection Agency Technical evaluation of the Intervention Values for Soil/sediment and Groundwater Human and ecotoxicological risk assessment and derivation of risk limits for soil, aquatic sediment and groundwater RIJKSINSTITUUT VOOR VOLKSGEZONDHEID EN MILIEU NATIONAL INSTITUTE OF PUBLIC HEALTH AND THE ENVIRONMENT The report is limited to the environmental aspects specifically reported on, and is necessarily restricted and no liability is accepted for any other aspect especially concerning gradual or sudden pollution incidents. The opinions expressed cannot be absolute due to the limitations of time and resources imposed by the agreed brief, the nature of geology and the possibility of unrecorded previous use and abuse of the site and adjacent sites. The report concentrates on the site as defined in the report and provides no opinion on surrounding sites. If migrating pollution or contamination (past or present) exists further research will be required before the effects can be fully determined.

9 Page 3 Our Ref Sample Ref Analysis of Leachade Samples mg/l Level (OD) Sulphur, Cyanide, Tricyanate, Phenols, Antimony, Arsenic, Barium, Cadmium, 1 B R < LOD < LOD < LOD < LOD < LOD < LOD < LOD 2 B R < LOD < LOD < LOD < LOD < LOD 0.3 < LOD 3 B2-2-A 8320 R < LOD < LOD < LOD < LOD < LOD 0.4 < LOD 4 B R < LOD < LOD < LOD < LOD < LOD 0.2 < LOD 5 B R < LOD < LOD < LOD < LOD < LOD 0.3 < LOD 6 B R < LOD < LOD < LOD < LOD < LOD < LOD < LOD 7 B R < LOD < LOD < LOD 21 < LOD < LOD < LOD 8 C R < LOD < LOD < LOD < LOD < LOD 0.4 < LOD 9 C R < LOD < LOD < LOD < LOD < LOD 0.4 < LOD 10 C R < LOD < LOD < LOD < LOD < LOD 0.4 < LOD 11 C R < LOD < LOD < LOD < LOD < LOD 0.2 < LOD 12 C R < LOD < LOD < LOD < LOD < LOD 0.2 < LOD 13 C R < LOD < LOD < LOD < LOD < LOD 0.2 < LOD 14 L R < LOD < LOD < LOD < LOD < LOD 0.2 < LOD 15 M R < LOD < LOD < LOD < LOD < LOD 0.2 < LOD 16 M R < LOD < LOD < LOD < LOD < LOD 0.3 < LOD 17 P R < LOD < LOD < LOD < LOD < LOD < LOD < LOD 18 P R < LOD < LOD < LOD < LOD < LOD 0.1 < LOD 19 P R < LOD < LOD < LOD 41 < LOD < LOD < LOD 20 P R < LOD < LOD < LOD 15 < LOD < LOD < LOD 21 P R < LOD < LOD < LOD < LOD < LOD 0.3 < LOD 22 P R < LOD < LOD < LOD < LOD 12 < LOD < LOD 23 P R < LOD < LOD < LOD < LOD < LOD 24 P R < LOD < LOD < LOD < LOD < LOD < LOD < LOD 25 P R < LOD < LOD < LOD < LOD < LOD < LOD < LOD 26 R R < LOD < LOD < LOD < LOD < LOD < LOD R R < LOD < LOD < LOD < LOD < LOD R R < LOD < LOD < LOD < LOD < LOD 0.1 < LOD 29 R R < LOD < LOD < LOD < LOD < LOD 0.1 < LOD 30 R R < LOD < LOD < LOD < LOD < LOD R R < LOD < LOD < LOD < LOD < LOD Q R < LOD < LOD < LOD < LOD < LOD 0.1 < LOD 33 Q R < LOD < LOD < LOD < LOD < LOD 0.2 < LOD 34 Q2A R < LOD < LOD < LOD 11 < LOD 0.1 < LOD 35 Q R < LOD < LOD < LOD 20 < LOD < LOD < LOD 36 Q R < LOD < LOD < LOD < LOD < LOD 0.2 < LOD 37 Q R < LOD < LOD < LOD < LOD < LOD 0.2 < LOD 38 S R < LOD < LOD < LOD < LOD < LOD 0.7 < LOD 39 S R < LOD < LOD < LOD < LOD < LOD < LOD < LOD Standard Soil Limits 1 Inert Landfill Limit L/S= 2 l/kg Inert Landfill Limit L/S= 10 l/kg Non Hazaedous Landfill Limit L/S= 2 l/kg Non-Hazardous Landfill Limit L/S= 10 l/kg Hazardous Landfill Limit L/S= 2 l/kg Hazardous Landfill Limit L/S= 10 l/kg

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11 Note: <LOD = Less than Level of Detection. Chromium Copper, Lead, Manganese, Mercury, Molybdenum, Nickel, Selenium, Vanadium, Zinc, < LOD < LOD < LOD 36 < LOD < LOD < LOD < LOD < LOD < LOD 104 < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD 331 < LOD < LOD < LOD < LOD 11 < LOD < LOD 36 < LOD 137 < LOD < LOD < LOD < LOD < LOD < LOD < LOD 184 < LOD 91 < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD 1480 < LOD < LOD < LOD < LOD < LOD < LOD < LOD 86 < LOD 185 < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD 23 < LOD < LOD < LOD < LOD < LOD < LOD < LOD 83 < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD 444 < LOD < LOD < LOD < LOD < LOD < LOD 269 < LOD < LOD 1356 < LOD < LOD 0.1 < LOD < LOD < LOD 616 < LOD 62 < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD 2 < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD 99 < LOD < LOD 0.1 < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD Page 4

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13 MTBE, PCB CongenTPH AliphatDioxins, Asbestos

14 Page1 Analysis of Solid Samples mg/kg Our Ref Sample Ref Level (OD) Sulphur, Cyanide, Tricyanate, Phenols, Antimony, Arsenic, Barium, Cadmium, 1 B R 4.10 < LOD < LOD < LOD < LOD < LOD 4 2 B R < LOD < LOD < LOD B2-2-A 8320 R < LOD < LOD < LOD B R < LOD < LOD < LOD B R < LOD < LOD < LOD B R < LOD < LOD < LOD B R < LOD < LOD < LOD C R < LOD < LOD < LOD C R < LOD < LOD < LOD C R < LOD < LOD < LOD C R < LOD < LOD < LOD < LOD < LOD C R < LOD < LOD < LOD C R < LOD < LOD < LOD L R < LOD < LOD < LOD M R < LOD < LOD < LOD M R < LOD < LOD < LOD P R < LOD < LOD < LOD P R < LOD < LOD < LOD P R < LOD < LOD < LOD P R < LOD < LOD < LOD P R < LOD < LOD < LOD P R < LOD < LOD < LOD P R < LOD < LOD < LOD P R < LOD < LOD < LOD P R < LOD < LOD < LOD R R < LOD < LOD < LOD R R < LOD < LOD < LOD R R < LOD < LOD < LOD R R < LOD < LOD < LOD R R < LOD < LOD < LOD R R < LOD < LOD < LOD Q R < LOD < LOD < LOD Q R < LOD < LOD < LOD Q2A R < LOD < LOD < LOD Q R < LOD < LOD < LOD Q R < LOD < LOD < LOD Q R < LOD < LOD < LOD S R < LOD < LOD < LOD 7 < LOD S R < LOD < LOD < LOD Element Sulphur, Cyanide, Tricyanate, Phenols, Antimony, Arsenic, Barium, Cadmium, Standard Soil Limits 1 Inert Landfill LimitsL/S= 10 l/kg Non Hazardous Landfill L/S= 10 l/kg Hazardous Landfill Limits L/S= 10 l/kg

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16 Note: <LOD = Less than Level of Detection. Chromium Copper, Lead, Manganese, Mercury, Molybdenum, Nickel, Selenium, Vanadium, Zinc, MTBE, BTEX, < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD Page < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD 22 < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD 8 54 < LOD < LOD < LOD < LOD 22 < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD 9 15 < LOD < LOD < LOD < LOD < LOD Chromium Copper, Lead, Manganese, Mercury, Molybdenum, Nickel, Selenium, Vanadium, Zinc,

17 200

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19 Page 6 PCBs in Leachade Analysis Our Ref Sample Ref Level (OD) PCB 28/31 PCB 52 PCB 101 PCB 118 PCB 153 PCB 138 PCB B <LOD <LOD <LOD <LOD <LOD <LOD <LOD 2 B <LOD <LOD <LOD <LOD <LOD <LOD <LOD 3 B2-2-A <LOD <LOD <LOD <LOD <LOD <LOD <LOD 4 B <LOD <LOD <LOD <LOD <LOD <LOD <LOD 5 B <LOD <LOD <LOD <LOD <LOD <LOD <LOD 6 B <LOD <LOD <LOD <LOD <LOD <LOD <LOD 7 B <LOD <LOD <LOD <LOD <LOD <LOD <LOD 8 C <LOD <LOD <LOD <LOD <LOD <LOD <LOD 9 C <LOD <LOD <LOD <LOD <LOD <LOD <LOD 10 C <LOD <LOD <LOD <LOD <LOD <LOD <LOD 11 C <LOD <LOD <LOD <LOD <LOD <LOD <LOD 12 C <LOD <LOD <LOD <LOD <LOD <LOD <LOD 13 C <LOD <LOD <LOD <LOD <LOD <LOD <LOD 14 L <LOD <LOD <LOD <LOD <LOD <LOD <LOD 15 M <LOD <LOD <LOD <LOD <LOD <LOD <LOD 16 M <LOD <LOD <LOD <LOD <LOD <LOD <LOD 17 P <LOD <LOD <LOD <LOD <LOD <LOD <LOD 18 P <LOD <LOD <LOD <LOD <LOD <LOD <LOD 19 P <LOD <LOD <LOD <LOD <LOD <LOD <LOD 20 P <LOD <LOD <LOD <LOD <LOD <LOD <LOD 21 P <LOD <LOD <LOD <LOD <LOD <LOD <LOD 22 P <LOD <LOD <LOD <LOD <LOD <LOD <LOD 23 P <LOD <LOD <LOD <LOD <LOD <LOD <LOD 24 P <LOD <LOD <LOD <LOD <LOD <LOD <LOD 25 P <LOD <LOD <LOD <LOD <LOD <LOD <LOD 26 R <LOD <LOD <LOD <LOD <LOD <LOD <LOD 27 R <LOD <LOD <LOD <LOD <LOD <LOD <LOD 28 R <LOD <LOD <LOD <LOD <LOD <LOD <LOD 29 R <LOD <LOD <LOD <LOD <LOD <LOD <LOD 30 R <LOD <LOD <LOD <LOD <LOD <LOD <LOD 31 R <LOD <LOD <LOD <LOD <LOD <LOD <LOD 32 Q <LOD <LOD <LOD <LOD <LOD <LOD <LOD 33 Q <LOD <LOD <LOD <LOD <LOD <LOD <LOD 34 Q2A <LOD <LOD <LOD <LOD <LOD <LOD <LOD 35 Q <LOD <LOD <LOD <LOD <LOD <LOD <LOD 36 Q <LOD <LOD <LOD <LOD <LOD <LOD <LOD 37 Q <LOD <LOD <LOD <LOD <LOD <LOD <LOD 38 S <LOD <LOD <LOD <LOD <LOD <LOD <LOD 39 S <LOD <LOD <LOD <LOD <LOD <LOD <LOD Note: <LOD = Less than Level of Detection.

20 Page 5 PCBs in Solid Analysis Our Ref Sample Ref Level (OD) PCB 28/31 PCB 52 PCB 101 PCB 118 PCB 153 PCB 138 PCB B <LOD <LOD <LOD <LOD <LOD <LOD <LOD 2 B B2-2-A <LOD <LOD B B B B C C C <LOD <LOD <LOD <LOD <LOD 7 <LOD 11 C <LOD <LOD <LOD <LOD <LOD <LOD <LOD 12 C C L M <LOD 16 M P P <LOD <LOD P <LOD P <LOD <LOD 5 9 <LOD <LOD <LOD 21 P <LOD 5 <LOD <LOD <LOD <LOD <LOD 22 P <LOD <LOD <LOD 10 <LOD 7 <LOD 23 P <LOD <LOD 5 6 <LOD 5 <LOD 24 P <LOD P <LOD <LOD <LOD <LOD <LOD <LOD <LOD 26 R R R R R R Q Q Q2A Q Q Q S <LOD <LOD 3 <LOD 39 S <LOD <LOD 6 <LOD Human Toxicology Serious Risk Concentrations ug/kg Note: <LOD = Less than Level of Detection.

21 Page 7 Total Petroleum Hydrocarbons ug/l BTEX, ug/l Alphatic Fraction ug/l Our Ref Sample Ref Level (OD) Benzene Toluene Ethylbenzene m & p Xylene o-xlele C5 - C6 C6-C8 C8 - C10 1 B R < LOD < LOD < LOD < LOD < LOD < LOD < LOD < 20 2 B R < LOD < LOD < LOD < LOD < LOD < LOD < LOD < 20 3 B2-2-A 8320 R < LOD < LOD < LOD < LOD < LOD < LOD < LOD < 20 4 B R < LOD < LOD < LOD < LOD < LOD < LOD < LOD < 20 5 B R < LOD < LOD < LOD < LOD < LOD < LOD < LOD < 20 6 B R < LOD < LOD < LOD < LOD < LOD < LOD < LOD < 20 7 B R < LOD < LOD < LOD < LOD < LOD < LOD < LOD < 20 8 C R < LOD < LOD < LOD < LOD < LOD < LOD < LOD < 20 9 C R < LOD < LOD < LOD < LOD < LOD < LOD < LOD < C R < LOD < LOD < LOD < LOD < LOD < LOD < LOD < C R < LOD < LOD < LOD < LOD < LOD < LOD < LOD < C R < LOD < LOD < LOD < LOD < LOD < LOD < LOD < C R < LOD < LOD < LOD < LOD < LOD < LOD < LOD < L R < LOD < LOD < LOD < LOD < LOD < LOD < LOD < M R < LOD < LOD < LOD < LOD < LOD < LOD < LOD < M R < LOD < LOD < LOD < LOD < LOD < LOD < LOD < P R 2.25 < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD 18 P R 0.80 < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD 19 P R < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD 20 P R 2.10 < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD 21 P R 2.50 < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD 22 P R 3.20 < LOD < LOD < LOD < LOD < LOD < LOD < LOD P R 1.90 < LOD < LOD < LOD < LOD < LOD < LOD < LOD P R 1.40 < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD 25 P R < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD 26 R R 0.9 < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD 27 R R 2.6 < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD 28 R R -2.2 < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD 29 R R -0.4 < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD 30 R R 1.3 < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD 31 R R 0.8 < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD 32 Q R 0.95 < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD 33 Q R < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD 34 Q2A R 3.15 < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD 35 Q R 3.15 < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD 36 Q R < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD 37 Q R 2.15 < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD 38 S R 0.45 < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD 39 S R < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD Human Toxicology Serious Risk Concentrations ug/l Note: <LOD = Less than Level of Detection.

22 Total Petroleum Hydrocarbons ug/l Page 8 Aromatic Fraction ug/l C10 - C12 C12-C16 C16-C21 C21-C 35 Total Aliphatics C5 - C6 C6-C8 C8 - C10 C10 - C12 C12-C16 C16-C21 C21-C 35 <20 <20 <20 <20 < 20 < LOD < LOD < 20 < 20 < 20 < 20 < 20 < 20 < 20 < 20 < 20 < 20 < LOD < LOD < 20 < 20 < LOD < 20 < 20 < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD 23 < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD Note: <LOD = Less than Level of Detection.

23 Total Petroleum Hydrocarbons ug/l Page 9 Total Aromatics TPH Methyl t-butyl ether Benzene Ethylbenzene Xylenes < < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD E+06 < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD E+07 < LOD < LOD < LOD < LOD E+06 < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD E+06 < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD < LOD Note: <LOD = Less than Level of Detection.

24