13.07.2015 Views

Opus International Consultants (NSW) Pty Ltd - Transport for NSW ...

Opus International Consultants (NSW) Pty Ltd - Transport for NSW ...

Opus International Consultants (NSW) Pty Ltd - Transport for NSW ...

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

Preliminary Site Investigation at63 North Pde, Mt Druitt <strong>NSW</strong> A. D. Envirotech Australia <strong>Pty</strong> <strong>Ltd</strong>RepresentativenessRepresentativeness is a measure of the degree to which data accurately and precisely represent acharacteristic of a population parameter at a sampling point or <strong>for</strong> a process condition orenvironmental condition.It was verified that each point in space had an equal probability of being selected <strong>for</strong> sampling.The site investigation revealed that soil samples collected were representative of the stratigraphic<strong>for</strong>mations from which they were collected. It appears that measurements of the population ofinterest were made in such a manner that the resulting data appropriately reflect the environmentinvestigated.ComparabilityComparability is the qualitative term that expresses the ability to fairly compare sample testresults taken from the same site at different times.ADE‟s field personnel assigned <strong>for</strong> the project had considerable experience in the environmentalinvestigations of contaminated sites. Training records of the personnel are kept in the QualityAssurance Manual ADE-QAM-III. Sampling and measurements in the field were per<strong>for</strong>med bythe same personnel during the field stage of the investigation.Standard ADE‟s environmental investigation procedures were used by the personnel in the field.No deviations from the sampling procedures were observed by the site supervisor during thefieldwork. There<strong>for</strong>e, none or negligent bias in the data collection was expected.The spatial and temporal changes on the site during this period did not have significant influencein order to bias the data due to the environmental dynamics.Units in which the data was measured in the field and the laboratory analysis had the samemetrics.CompletenessDocumentation CompletenessIn the author‟s opinion, the documentation used in the course of the investigation, including:Field observation logs,Chain of Custodies,Orders,Laboratory accreditation, andLaboratory reports.was completed to satisfactory standards.4224 63 North Pde Mt Druitt PSI.v1 final Page 48

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!