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

CSR Building Products Limited                                                                                            Page 7
West Ridge Quarry
Site Based Management Plan



Table 4 - Definitions of Consequence

Rating                          Descriptor                                                           Score

Negligible                      Impacts not requiring any treatment or management action             1
                                Nuisance or insignificant environmental harm requiring minor
Minor                                                                                                2
                                management action
Moderate                        Serious environmental impacts, readily manageable at low cost        3
                                Substantial environmental impacts, manageable but at considerable
Major                                                                                                4
                                cost and some disruption
                                Severe environmental impacts with major consequent disruption and
Catastrophic                                                                                         5
                                heavy cost

The consequence and likelihood scores are then plotted on the Risk Assessment Matrix, see Table 5 - Risk Assessment
Matrix. The final risk level assigned is a product of the likelihood and consequence scores. The higher the risk score, the
higher the priority is for management.

Table 5 - Risk Assessment Matrix
                                               Consequence
Likelihood                                     Negligible     Minor            Moderate         Major         Catastrophic
                                               1              2                3                4             5
Almost                                         5              10               15               20            25
                         5
Certain                                        Medium         High             High             Extreme       Extreme
                                               4              8                12               16            20
Likely                   4
                                               Low            Medium           High             High          Extreme
                                               3              6                9                12            15
Possible                 3
                                               Low            Medium           Medium           High          High
                                               2              4                6                8             10
Unlikely                 2
                                               Low            Low              Medium           Medium        High
                                               1              2                3                4             5
Rare                     1
                                               Low            Low              Low              Low           Medium

Table 6 - Indicative Management Option for Each Risk Assessment Rating describes the possible actions required for
each risk assessment rating.

Table 6 - Indicative Management Option for Each Risk Assessment Rating

Risk Rating                              Risk Rating Scores      Indicative Management Option
                                                                 Manage by implementing Site management and emergency
Extreme                                  16 – 25
                                                                 procedures, plant design controls and regular monitoring
                                                                 Manage by implementing Site management and emergency
High                                     10 – 15                 procedures, specific monitoring and may require some
                                                                 operation/plant design controls
                                                                 Manage by implementing specific monitoring or response
Medium                                   5–9
                                                                 procedures
                                                                 Manage by routine procedures, unlikely to need specific
Low                                      1-4
                                                                 application of resources




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