Installation of three wells on a service station site, as minimum, is a mandatory requirement in order to establish groundwater flow direction.
The groundwater assessment report, which will be prepared in line with the minimum mandatory requirements of the UPSS Regulation (2008), will include:
· Results of the groundwater laboratory analysis assessed against relevant guideline concentrations;
· Well construction details;
· Site plan showing the location of the monitoring wells;
· Groundwater contours with inferred groundwater flow direction; and
· Recommendations (if any) on further works.
The basic scope of works will involve the installation of three groundwater monitoring wells (see attached plan), followed by one sampling event from each of the three monitoring wells. Our proposed estimated cost will include a provision for the following services:
· Obtain service plans for the site (Dial Before You Dig);
· Underground service location by a qualified service locator;
· Obtain Hot Work Permit for drilling on site;
· Construction of the wells in line with current industry standards and guidelines;
· On completion of installation approximately three well volumes of water will be purged from each well using a dedicated polyethylene bailer;
· All soil samples obtained from soil borings will be screened for volatile organic compounds, using a photoionisation detector (PID);
· Groundwater from each well will be sampled and analysed at a NATA accredited laboratory for a suite of contaminants; and
· Prepare the assessment report with the results of the groundwater laboratory analysis assessed against relevant guideline concentrations and a site plan showing the location of the monitoring wells, groundwater contours and inferred groundwater flow direction.
EIS will also complete the monitoring well licence application form and submit to the NSW Office of Water in order to obtain mandatory approval for installation of monitoring wells.Please note that EIS will not notify the OEH of the contamination status of the site unless specifically requested by the client. The OEH (formerly DECCW, DECC, DEC and EPA) have recently changed their name to Office of Environment and Heritage (OEH).
Protection of Environment Operation (Underground Petroleum Storage Systems) Regulation, NSW Government, 2008 (UPSS Regulation 2008)