ACID SULFATE SOILS - MARYBOROUGH AREA

460000mE 65 70 75 80 85 90 495000mE

152 36 152 42 152 48 152 54

Hervey Bay PROJECT MANAGEMENT C R Ahern, QASSIT, Natural Resource Sciences, Department of Natural Resources and Mines, Indooroopilly Sciences Centre, .

SURVEY by P R Wilson, H M Anderson and D M Brown, Natural Resource Services, Department of Natural Resources and Mines, Bundaberg and C R Ahern, QASSIT, Natural Resource Sciences, Department of Natural Resources and Mines, Indooroopilly Sciences Centre, Brisbane.

CARTOGRAPHY by G J Finney, Natural Resource Information Management, Department of Natural Resources and Mines, Indooroopilly Sciences Centre, Brisbane. LABORATORY ANALYSIS by Natural Resource Sciences Laboratories, Department of Natural Resources and Mines, Indooroopilly Sciences Centre, Brisbane. NA ACCURACY STATEMENT: Due to varying sources of data sets, spatial locations may not coincide when overlaid.

Produced at the Indooroopilly Sciences Centre by Natural Resource Information Management, Natural Resource Sciences, Department of Natural Resources and Mines.

DISCLAIMER: While every care is taken to ensure the accuracy of this product, the Department of Natural Resources and Mines makes no representations or warranties about its accuracy, reliability, completeness or suitability for any particular purpose and disclaims all responsibility and all liability (including without limitation, liability in negligence) for all expenses, losses, damages (including indirect or consequential damage) and costs which you might incur as a result of the product being inaccurate or incomplete in any way for any reason. LP a0S2 33 C The State of (Department of Natural Resources and Mines) 2002. 7205000mN 7205000mN

S2 NA a1S2 NA LP

21 A0S1 13 LP LP Urangan LP S2 NA Dundowran

NA 25 18 25 18 S2 NA

TORBANLEA - PIALBA NA NA

LP NA

NA 00 00 G

Takura r e a t

S NA a n

d NA y ROAD

NA S t r a i t NA

Torbanlea NA

NA NA

NA NA

NA 95 NA 95

A0S2 a0S3/S4 10 S0

A0S2 NA

NA

LP A0S2 LP HERVEY BAY (CITY) LP S0 NA

BRUCE HIGHWAY A0S1 11 a0S1 12 S0

A0S2 LP 25 24 25 24 LP a1S2 NA A0S0 A0S2 Bingham 90 90

19 LP a1S2 NA A0S0 32 S0 r LOCALITY MAP a1S2 Rive 152 30 153 00 an A0S1 NA s Coonarr Su A0S1 NA Study Area A0S2 25 00 25 00 NA Maryborough - Hervey Bay Study A0S2 Maryborough - Tiaro Study LP Woodgate NA A0S1 S0 LP HERVEY BAY LP Cordalba NA NA Lynwood Buxton Isis Junction A0S1

Horton A0S2 T

Childers I

Toogoom Point Vernon A R

Hervey Bay T Pialba Urangan S Torquay LP Howard Takura Burrum Y A0S1 D Torbanlea Pialba South N A S 7 8 Duckinwilla Bingham A0S1 A0S1 NA T LP A0S1 A 6 E Colton R G Aldershot S0 85 LP 85 Mount Doongul A0S1 25 30 25 30 S0 Oakhurst LP LP Maryborough LP Yengarie NA Grout Mountain Brooweena A0S1 Maaroom 9 A0S1 Aramara Pilerwa LP S0 Boonooroo NA Mount Benargie Tuan S0 LP Sunny Glen Blackmount A0S1 Tiaro NA Tawan Tinnanbar A0S2 Netherby NA 1 S3/S4 LP A0S1 NA Mount Urah Bauple A2S3/S4 A1S2 LP Gootchie NA 5 SCALE A0S2 A0S1 A0S1 km km Tin Can Bay 20 A1S2 15 015 NA A0S1 LP Toolara 15 A1S2 A2S3/S4 A1S2 S3/S4 A0S1 Toolara Forest 26 00 LP 26 00 S0 A1S3/S4 LP 152 30 153 00 31 Woolooga A1S1 S0 16 a0S3/S4 A0S1 LP 30 26 NA LP A0S1 A2S3/S4 27 LP NA A0S2 A0S3/S4 er A1S2 NA Mary Riv S3/S4 28 LP 80 A0S1 3 80 4 NA NA S3/S4 LP 25 30 a0S3/S4 NA 25 30 a0S2 29 LP LP NA 2 A1S0 a0S2 LP NA LP A0S2 LP LP LP Oakhurst S3/S4 S2

17 NA S3/S4 A0S2 18 NA NA NA Mary River NA

LP NA MARYBOROUGH

NA NA S3/S4 LP LP Granville LP NA SCALE 1 : 50 000 metres kilometres 75 100001 2 3 4 75

NA MARYBOROUGH (CITY) Sugar Mill Projection: Universal Transverse Mercator (MGA Zone 56) NA LP 14 Horizontal Datum: GEOCENTRIC DATUM OF AUSTRALIA (GDA94) NA NA Note: This map is GDA94 compliant

25 NA LP LP S3/S4 NA Tinana MARYBOROUGH TUAN FOREST ROAD 34 S3/S4 NA LP S2 NA LP S3/S4

NA S3/S4 NA A0S2

NA

S3/S4 S3/S4

NA LP A0S1 S3/S4 LP NA 70 70 S3/S4 NA REFERENCE ACID SULFATE SOILS (ASS)1 ON RELATIVELY UNDISTURBED LAND Depth Depth to Actual Depth to Strongly Depth to Potential Depth Code Acid Sulfate Soil2 Acidic Soil layer2 Acid Sulfate Soil3 (pH ≤4.0) (pH >4.0 to ≤5.0)

25 36 NA 0 - 0.5m 0 A0 a0 S0 25 36 NA WOOCOO a1 S3/S4 0.5 - 1m 1 A1 S1

NA 1 - 2m 2 A2 a2 S2 BRUCE HIGHWAY Maaroom 2 - 3m 3 A3 a3 S3

NA 3 - 4m 4 A4 a4 S4 LP

TIARO NA 4 - 5m 5 A5 a5 S5 LP NA

>5m 5+ A5+ a5+ S5+ LP A0S1 NOTE: The depth codes above imply that a predominance of profiles in the map unit fall within the nominated depth range. A0S1 NA 65 65 Tinana Creek Actual acid sulfate soil layers (designated with an A code) often overlie potential acid sulfate soil layers (designated with an S code). Where this occurs e.g. A0S2 the map unit is coloured according to the depth of the upper surface of the 'actual' layer (A0) and overlayed with yellow dots. An 'a' preceding the soil depth code e.g. a1S2 indicates a strong acid soil layer with field NA pH ranging from >4.0 to ≤5.0. This may or may not be a result of sulfide oxidation. While 'a' depth code is shown on the map, no colour is assigned to it.

A0S1 NA In areas where there is varying depth to an ASS layer that cannot be separately mapped at the operative scale, two colours are used to designate the dominant depths. This appears as equal width striped colours. e.g. S1/S2 NA Owanyilla LAND WITH A LOW PROBABILITY OF ACID SULFATE SOIL OCCURRENCE LP NA NA Land between the 5m AHD contour and the outer limit5 of Holocene, estuarine ASS (ie. land <5m AHD) as mapped at this scale, with low probability of ASS occurrence. LP Limited field investigation. BOONOOROO ROAD LAND NOT ASSESSED

5 LP Land not assessed for ASS as part of this survey. It may include non ASS land beyond the boundary established as the limit of Holocene, estuarine, pyrite sediments a0S1 NA but insufficient or no field testing was carried out.

1 Acid sulfate soil is the generic term used to define soils derived from estuarine sediments containing iron sulfides (pyrite) or containing the acidic products of the oxidation of sulfides. The term includes actual and potential acid sulfate soils. LP 2 An "A" preceding the soil depth code indicates the probable depth to a soil layer or horizon where a field pH of ≤4.0 is first encountered. A field pH of 4.0 or less is used as an indicator of an Actual Acid Sulfate Soil (AASS) which has mobile acidity in the form of ionic hydrogen, aluminium, iron or acid salts. Extensive areas with high actual acidity derived from sulfide oxidation 22 23 may constitute a significant environmental hazard. Some soils with high organic matter may have low pH from organic acids. An 'a' preceding the depth code indicates the probable depth to a a0S1 a0S1 soil layer or horizon with field pH ranging from >4.0 to ≤5.0. This may or may not be a result of ASS oxidation. Boonooroo 3 An "S" preceding the soil depth code indicates the probable depth to a Potential Acid Sulfate Soil (PASS) layer or horizon. PASS are soils where the oxidisable sulfur percentage of pyritic origin exceeds the prescribed 'action criteria4' at which treatment is required if disturbed. Testing for Oxidisable sulfur is conducted by the Total Oxidisable Sulfur (TOS) method, the Chromium Reducible Sulfur (S ) method or the Peroxide Oxidisation - Combined Acidity and Sulfate (POCAS) method. CR 4 Oxidisable sulfur 'Action Criteria' that trigger treatment are currently: Sands, 0.03 S%; Loams to light clays, 0.06 S%; Medium to heavy clays, 0.1 S%. NOTE: For disturbance > 1000 tonnes the action criteria is 0.03% regardless of soil texture. 7160000mN 7160000mN 5 The outer boundary of Holocene estuarine ASS commonly occurs at the intersection with hard rock or other materials of non estuarine origin. It is either at the 5m contour or at lower elevation. This boundary is established using limited field checking at the boundary itself, together with the use of contour lines and geological map boundaries. There is no field assessment beyond the 5m AHD contour level. It should be noted, however, that certain lithologies on land above 5m AHD may contain sulfidic material of non estuarine/Holocene origin. Additionally, much older, Tuan LP estuarine, pyritic sediments may occur at depth on land >5m AHD. 24

NOTE: This map should be used in conjunction with the accompanying report covering this area.

23 Borehole locations where profiles were described in detail and samples taken for analysis NA TIARO NA Local Authority boundary Cane Assignments (July 1995) Digital Cadastral Data Base ACID SULFATE SOILS MARYBOROUGH AREA Ref. No. NR&M-MAC-I-A0 3285 25 42 152 36 152 42 152 48 152 54 25 42

460000mE 65 70 75 80 85 90 495000mE