Results of consent holder monitoring
2.1.3.1 Stormwater monitoring by OMV
OMV monitors the combined stormwater discharge from the site, with sampling triggered by rainfall events.
Table 4 shows the results obtained during the 2018-2019 monitoring year. In all samples pH, hydrocarbons
and chloride levels were all within/below the limits set by consents 5997-1 and 6269-1, and were indicative
of a consistently clean discharge. The level of suspended solids was slightly above the allowable limit
Tawhiti Catchment consent monitoring report 2018-2019
Kaupapa Māori Freshwater Assessments (Perception Planning Ltd)
smoke or odours noted.
29 September 2016
The site was inspected following reasonably heavy rainfall over the preceding 12 to 18 hours. All ring drains
and bunds were clear of contamination and the skimmer pits were operating in a satisfactory manner. There
were no adverse effects of discharge observed in the nearby tributary. Full drums of oil were securely
contained in a bund while empty drums were awaiting removal.
No flaring was occurring.
16 January 2017
The site was
shallow water table. Test bores were augured to 10 m in the pit area, revealing extensive compacted, low
permeable clays underlying coastal dune sands. Pit construction revealed mostly tightly packed sand at the
pit bases (approximately 4-5 m below surface). Average annual rainfall for the site is 1,023 mm (taken from
the nearby ‘Duffy’ monitoring station). As with the other South Taranaki coastal sites, this site is subject to
strong winds.
Figure 1 WRS Symes Manawapou Landfarm extent and …
Executive, Audit & Risk Committee agenda August 2020
have included an additional sediment settling pond being added to
the stormwater system (Photo 4). This discharges to the stream via a new pipe (STW002101) into the same
manhole as STW002016. The original connection from the skimmer pits (STW002016) has been retained so
that during times of high rainfall the flow can come directly from the skimmer pits rather than flushing out
the sediment settling pond.
Sampling of the discharge from the Kaimiro Production Station was undertaken twice
Lake Rotorangi monitoring report 2019-2020