Development Application part 2 OF 2 All of CD, Information in notes - MCU12/0216

CSR Building Products Limited                                                                                                                           Page 4
West Ridge Quarry
Site Based Management Plan


1.4          Description of Existing Environment
Regional Climate:               The Site lies within a subtropical region of Queensland’s South East coast. There is a strong
                                seasonal component to the regional weather. Highest rainfall is experienced in summer between
                                December and June. The annual mean rainfall is approximately 1635.1 mm with the driest month
                                being September. Mean daily maximum temperatures range from 21.1°C during July to 28.4°C
                                during January. The mean daily minimum temperature ranges from 11.0°C during July to 22.0°C in
                                February. Coastal breezes predominantly prevail in south-easterly to north-easterly directions. A
                                summary of the Regional Climatic Statistics is as follows:

                                Table 1 – Regional Climatic Statistics

                                           Jan       Feb      Mar      Apr      May      Jun      Jul    Aug    Sep    Oct     Nov      Dec      Annual


                                  Rainfall (mm)

                                  Mean     142.1     222.2    207.7    170.3    164.9    126.6    77.7   90.1   64.0   98.3    107.4    161.7    1635.1


                                  Temperature (°C)

                                  Mean
                                  min.     21.8      22.0     20.6     18.0     14.7     12.5     11.0   11.6   14.4   16.9    18.7     20.7     16.9

                                  Mean
                                           28.4     28.4      27.4    25.7     23.5    21.5      21.1 22.0 24.3        25.4    26.4     27.9     25.2
                                  max.
                                 Source: Bureau of Meteorology’s Tewantin RSL Park Weather Station (no. 040908)


Topography and                  The Site covers approximately 78ha. Elevation across the Site ranges between 93 mAHD at the
Drainage:                       lowest point to 118 mAHD in the Northern sector. The Site is traversed by several ephemeral gullies
                                that drain towards Six Mile Creek.

Geology and                     The Site includes two distinct geological types. The western edge of the Site contains Tertiary aged
Groundwater                     geology consisting of shale, sandstone, conglomerate and basalt also known as the Pomona Beds.
Hydrology:                      The eastern edge of the Site in the lower lying areas adjacent to the left branch of Six Mile Creek
                                contains Quaternary aged flood plain alluvium including clay, silt, sand and gravels.

Soil and Land Use               It is anticipated that the final landform for the Site will be open native grassland.
Suitability:
                                The eastern portion of the Site in the proposed main pit area is considered to be Strategic Cropping
                                Land (SCL), however data available for the Site and supporting documentation has provided
                                sufficient evidence to suggest that no cropping has occurred on the Site between 1 January 1999
                                and 31 December 2010. Subsequently, a request has been lodged with EHP to register the Site as
                                non-SCL. On 27 November 2012, correspondence from the Department of Natural Resources and
                                Mines (DNRM) confirmed that the Site was non-SCL.

                                The Site is not located at or near an area were acid sulphate soils have previously been identified or
                                within a prospective land zone containing acid sulphate soils.

Erosion Risk:                   Erosion risk for the region based on average monthly rainfall depth is as follows:

                                Table 2 – Monthly Erosion Risk for the Region Based on Average Monthly Rainfall Depth
                                         Jan       Feb       Mar      Apr      May      Jun      Jul     Aug     Sep     Oct      Nov      Dec
                                         H         H         H        H        H        H        M       M       M       M        H        H
                                Notes: E = Extreme, H = High, M = Moderate, L = Low, VL = Very Low


Contaminated                    A Contaminated Land Search shows that Lot 2 and Lot 3 on SP108094 are included on the
Land Status:                    Environmental Management Register (EMR) as follows:



December 2012 / file ref. 1271_610_001                                                                                                 GROUNDWORK p l u s