Appendix E NWR H2 Hydrogeological Assess Reduced.Pdf
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ZIZ Resorts Pty Ltd H 2 Hydrogeological Report Lighthouse Holiday Park Redevelopment ZIZ Resorts Pty Ltd H2 Hydrogeological Assessment Lighthouse Holiday Park Redevelopment ZIZ Resorts Pty Ltd H 2 Hydrogeological Report Lighthouse Holiday Park Redevelopment 2255 | Rev 3 4 January 2021 Pennington Scott ABN 76 747 052 070 GPO Box A10, Perth WA 6849 T +61 (0)8 9441 0999 F +61 (0)8 9204 1595 www.penningtonscott.com.au Page ii 2255 Rev 3: 4 February 2021 ZIZ Resorts Pty Ltd H2 Hydrogeological Assessment Lighthouse Holiday Park Redevelopment This report has been prepared on behalf of and for the exclusive use of ZiZ Resorts Pty Ltd and is subject to and issued with the agreement between ZIZ Resorts Pty Ltd and Pennington Scott. Pennington Scott accepts no liability or responsibility whatsoever for it in respect of any use or reliance upon this report by any third party. Copying this report without permission of ZIZ Resorts Pty Ltd or Pennington Scott is not permitted. REVISION ISSUED DESCRIPTION Rev 0 6 Nov. 2020 Issued to client for review Rev 1 10 Nov. 2020 Issued to DWER for review Rev 2 2 Feb 2020 Re issued to client Rev 3 4 Feb 2020 Re issued to DWER Page 3 2255 Rev 3: 4 February 2021 ZIZ Resorts Pty Ltd H2 Hydrogeological Assessment Lighthouse Holiday Park Redevelopment EXECUTIVE SUMMARY ZIZ Resorts Pty Ltd (the Proponent) purchased the Ningaloo Lighthouse Holiday Park in late 2018 and is seeking to redevelop it into an eco-resort in 2021. The Proponent currently holds groundwater licence GWL153728 to take 32,000 kL/year from the Exmouth North Saline Resource but is seeking to increase the saline water allocation to 72,000 kL/year to produce 50,000 kL/year of potable water. The borefield would provide up to 259 kL/day during the peak tourist season (1 April to 31 October) and 108 kL/day during the low season (1 November to 31 March). At the time of the purchase, Lighthouse had four (4) existing equipped water bores on Lot 2, plus was receiving makeup water from the Department of Defence. In August 2020 the Department of Water and Environmental Regulation granted the Proponent a 26D permit CAW204525(1) to explore and develop seven (7) additional water bores in the Work Area along the eastern edge of the Cape Range, so that the Project could become fully self-sufficient for water. The new bores were completed between August and September 2020 and as part of the hydrogeological investigations, all bores were pump tested for 48hrs at 0.5 L/s, during which water quality parameters were monitored during the tests. The hydrogeological investigations reveal that the Tulki Limestone beneath the Property is a saline groundwater resource, with better quality (brackish to saline) groundwater (3,000 to 14,000 mg/L) at the water table, becoming more saline with depth. The highest measured salinity on the property was 24,000 mg/L from about 30 m below the water table, which is still less saline than seawater as measured at Exmouth during the program, being 33,200 mg/L. All bores are screened a few metres beneath the water table such that they skim only the better-quality groundwater from the top of the water table. Seasonal borefield abstraction in the high season is likely cause groundwater salinity in the immediate borefield vicinity to increase marginally as better-quality groundwater is sipped from the water table. However, water quality would recover over the wetter season, when abstraction rates are minimal and when natural recharge over the Cape Range is at its highest. Groundwater abstraction over the high season is likely to cause a maximum discernible drawdown impact extending up to 370 m from the borefield, with the highest drawdown in each production bore ranging from 0.4 to 0.6 m. The perceived environmental and social impacts that could may arise from the expansion of the Project borefield are as follows: • Groundwater dependent ecosystems - Bennelongia (environmental consultants) have been engaged to conduct a subterranean fauna study of the Project borefield, which will comprise a comprehensive desktop study and a field sampling program in accordance with the Environmental Protection Agency guidance documents. Sampling prior to this report has not been possible because the bores were only completed in late September 2020, and in line with EPA requirements, subterranean fauna sampling should ideally be undertaken 3 months post disturbance. Notwithstanding the above, the BoM database reveals Page 4 2255 Rev 3: 4 February 2021 ZIZ Resorts Pty Ltd H2 Hydrogeological Assessment Lighthouse Holiday Park Redevelopment the presence of the ‘Cape Range Subterranean Waterways’, located approximately 4 to 5 km northeast of the Project; • Other groundwater users – the Project would have no impact on other groundwater users because there are no other users within the drawdown impact area; indeed, the nearest third-party bore is more than 5 km away from the Project; and • Aboriginal Heritage – the Project would have no unacceptable impacts on aboriginal heritage values because there are no sites with water significance within the drawdown impact area; the nearest site of water significance is 3 km away and the Proponent has agreed to engage regularly with the Nganhurra Thanardi Garrbu Aboriginal Corporation (NTGAC) with respect to groundwater abstraction and protection of this site; and the Proponent has implemented a management plan to avoid impacts to one identified artifact site within in the borefield area. Page 5 2255 Rev 3: 4 February 2021 ZIZ Resorts Pty Ltd H2 Hydrogeological Assessment Lighthouse Holiday Park Redevelopment CONTENTS 1. BACKGROUND ......................................................................................... 8 2. HYDROGEOLOGICAL SETTING ............................................................ 10 2.1 Climate ......................................................................................... 10 2.3 Geology ........................................................................................ 11 2.4 Hydrogeology ............................................................................... 15 2.4.1 Aquifer and permeability .................................................... 15 2.4.2 Water table ........................... Error! Bookmark not defined. 2.4.3 Recharge ........................................................................... 15 2.4.4 Groundwater salinity .......................................................... 16 3. ABORIGINAL HERITAGE SURVEY ....................................................... 18 4. FLORA AND FAUNA SURVEY / CLEARING PERMIT ........................... 19 5. HYDROGEOLOGICAL FIELD PROGRAM.............................................. 21 5.1 Drilling and Bore Construction ...................................................... 21 5.2 Pump Testing ............................................................................... 25 5.3 Laboratory Water Quality Analyses ............................................... 27 6. BOREFIELD DEVELOPMENT PLAN ...................................................... 28 7. ENVIRONMENTAL IMPACT ASSESSMENT .......................................... 29 7.1 Groundwater Dependent Ecosystems ........................................... 30 7.1.1 Aquatic and terrestrial GDEs ............................................. 30 7.1.2 Subterranean GDEs .......................................................... 30 7.2 Other Groundwater Users ............................................................. 31 7.3 Aboriginal Heritage Sites .............................................................. 31 8. CONCLUSION ......................................................................................... 36 REFERENCES.................................................................................................. 38 LIST OF FIGURES Figure 1-1: Lighthouse Holiday Park location map and land parcels..................... 9 Figure 2-1: Climate statistics from the Learmonth Airport (#5007) ...................... 10 Figure 2-2: Chip trays with drill samples from the northern and southern areas of the borefield; LH08P from the north, LH02M from the south. ..... 13 Figure 2-3 North-South hydrogeological section ................................................. 14 Figure 2-4 East-West hydrogeological section ................................................... 14 Page 6 2255 Rev 3: 4 February 2021 ZIZ Resorts Pty Ltd H2 Hydrogeological Assessment Lighthouse Holiday Park Redevelopment Figure 2-4 Water quality profile at the Property showing EC to 20m below the water table ..................................................................................... 17 Figure 4-1: Work area and cleared deviations around the P2 species ................ 20 Figure 5-1: Location of monitoring and production bores within the Lighthouse borefield ......................................................................................... 23 Figure 5-2: Relationship between EC and TDS .................................................. 27 Figure 7-1: Project borefield with GDEs, other water bores and Aboriginal heritage sites ................................................................................. 33 LIST OF TABLES Table 2-1: Stratigraphy of the Cape Range Group ............................................. 11 Table 5-1: Bore construction summary details .................................................... 24 Table 5-2: Cooper Jacob analysis of pump tests ................................................ 25 Table 5-3: Laboratory EC, pH and TDS measurements ....................................