Untitled 3

LRM Global has been engaged by a prominent storage company to undertake asbestos and hazardous materials audits nationwide. These continuous projects have encompassed a wide array of various hygiene tasks including;

Throughout these works LRM Global has identified risk and provided management solutions for the client. This has also led to the development of an online web-based data centre for the client for effective information distribution and access to all reports for all sites. For risk compliance assessments, LRM Global has developed an online portal that can be utilised for all clients. The web portal shows clients at a glance how they are performing compared to their KPIs, identifies what actions are required to improve their performance, allows clients to make updates to actionable risk items and compare the performance between all sites.

The online data centre has reduced the client’s workload by streamlining document control and distribution. A solid understanding of all the client’s sites has been developed allowing LRM Global to proactively manage the risks at each site and this has led to LRM Global being a close partner with this client for over 13 years with great success.

Untitled 1 Edit

LRM Global was requested by the client to conduct an investigation into a leaking 2000 L underground diesel storage tank (UDST) at a remote telecommunications exchange tower near Mildura, VIC. A consultant from LRM Global’s environmental team was deployed to conduct validation sampling of the soils surrounding the diesel tank in order to ascertain the presence of contamination. Upon identifying diesel contamination in both the tank pit sands and surrounding soils, the decision was made to remove the tank in order to prevent further contamination to the site.

Upon excavation the tank was found to be dry with observable punctures on the side and bottom of the UDST, a result of corrosion. Dried diesel residue was also observed on the underside of the tank. A number of samples were collected from the soils around the tank pit in order to determine the degree of contamination. The samples concluded that the onsite soils surrounding the UDST consisted of Category B Contaminated Soil, owing to exceedances of EPA Guidelines for TPH C10-C36. The presence of long hydrocarbon chains typical of diesel products within the soils confirmed that the UDST had acted as a point source for contamination.

In order to ascertain the linear and vertical extent of the contamination plume, validation sampling was conducted. Several soil bores were drilled and sampled in a grid-like pattern around the former UDST to assess the linear delineation of the plume. Once the contaminant plume was linearly delineated an excavation area for the removal of the contaminated material was determined. To assess the required depth of excavation and the vertical delineation of the plume a soil bore was drilled at the location of the former UDST, likely the area of furthest contamination penetration into the subsurface.

The extent of the contamination was observed at a depth of 25 m below ground level. As the contamination was observed to intercept the water table at 20 m, a groundwater monitoring well was constructed in order to assess the groundwater was impacted by the soil contamination. Sampling of the groundwater well concluded that the groundwater consisted of naturally poor quality and that the concentrations of TPH C10-C36 observed in the groundwater did not exceed EPA Guidelines and therefore no further remediation works were required.

Untitled 4

LRM Global was requested by the client to conduct a site assessment at a service station near Bendigo, VIC. The purpose of the assessment was to ascertain the contamination status of the site prior to sale and determine whether it was suitable for ongoing use as a service station.

In order to determine the sites history, and therefore gain insight into the potential contamination status of the site, LRM conducted a preliminary site investigation. The preliminary site investigation involved a desktop review of historical titles, maps, aerial imagery, previous land uses and previous investigations. Based on this information, LRM determined that the most likely contamination exhibited onsite would be hydrocarbons and heavy metals originating from historical onsite practices. It was also determined that due to the underlying geology and shallow water-table, both the underlying soils and groundwater could potentially be impacted by contamination.

In order to determine the presence of contamination onsite, LRM Global conducted drilling works to obtain samples of the underlying soils and allow for the installation of groundwater monitoring wells. These works involved an underground service check of each location before coring works to remove a subsection of the concrete forecourt. The soil samples were then collected from a solid stem auger, with the underlying basalt drilled via air hammering. In instances where groundwater was intercepted, a monitoring well was installed and developed. Samples were collected from these monitoring wells after a twenty-four hour period, to allow for settling to occur within the well. All works were conducted in accordance with the WPCG Guidelines.

Sample results indicated that hydrocarbon contamination was present in the soil, likely resulting from leaking fill lines or spills from the onsite service-station. The exhibited contamination was identified to not exceed the Health Investigation Levels (HILs) or Health Screening Levels (HSLs) outlined within the National Environmental Protection (Assessment of Site Contamination) Measure (ASC NEPM) and so no further investigation into the onsite soils was required. Additionally, no contamination was identified in the onsite groundwater. Following the investigation it was determined that the site was suitable for ongoing use as a petrol station.

C1C2 1