Treatment effectiveness. 6.4.4 Based on the post-monitoring results for the pilot-scale field trial carried out under Stage 1 Planning Review (City Planning – Maunsell Joint Venture, October 2007), a maximum reduction of over 99.9% of AVS (or no detection of AVS) from pre- to post-treatments were recorded at the treatment areas and by the end of the post-monitoring, the AVS levels remained low (<2,000 mg/kg dry wt.). As AVS is considered to be the key indicator for odour emissions in sediments, the reduction level is considered to be successful in suppressing odour at KTAC. Furthermore, the reduction and oxidation potential within the treated sediments had also increased considerably from pre-treatment monitoring. The absolute increases from pre-treatment to post-12-month monitoring range from 165mV to 338 mV indicated the sediments were under anoxic / aerobic conditions rather than the H2S generating anaerobic conditions. In addition, reduction of TOC, PAHs, and PCBs were noted in the post-monitoring results, indicating the degradation of organic pollutants within the sediments. Some toxicity reductions, in particular in sediment bioassays, were also observed.
Treatment effectiveness. RPC will deliver the Service in a competent and professional manner taking into account these terms. The ongoing effectiveness of the pest control treatment also depends on the Client maintaining good hygiene and maintenance practices around the premises including implementing RPC’s recommendations including on hygiene and property maintenance. Pest treatment may be rendered ineffective by disturbing areas adjacent to the treated structures, building alterations, renovations and introducing materials to the premises that encourage pest activity.
Treatment effectiveness. Treatment must be considered effective if the social, health, or work-disturbing disadvantages on which the referral was based have decreased. The results include reduced absenteeism and stabilisation of attendance at work.
