All technical information for the Company's Indonesian projects is obtained and reported under a formal quality assurance and quality control (QA/QC) program under the supervision of Qualified Persons, John Levings, B.Sc., the Company's Director and Joseph Ogierman, B.Sc.(Hons), the Company's Exploration Manager.
Rock / Channel / Trench
All rock samples (trench, channel and rock chip) are collected are placed in clean calico sample bags, A sample ticket is placed inside the bag before it is sealed. A duplicate ticket stays in the sample book along with recorded information of sample description and location. The sample site is also tagged and numbered. Sample locations are recorded by handheld GPS.
Soil
Soil samples are taken from the A or B horizon dependant on type of sample taken (eg. bulk or partial leach). Each sample if sieved using a 2mm mesh sieve to avoid bias caused by possible unweathered bedrock in the soil horizon. A sample ticket is placed inside the bag before it is sealed. A duplicate ticket stays in the sample book along with recorded information of sample description and location. The sample site is also tagged and numbered. Sample locations are recorded by handheld GPS.
Drill core
Selected intervals of diamond core are selected for sampling by the site Senior Geologist based on geological characteristics (alteration, mineralisation, lithology). These intervals are marked up on the core by the geologist using a permanent marker. The geologist also marks a sampling line parallel to the elongate axis of the core and perpendicular to the predominant geological or mineralogical fabric in the core in order to give the most unbiased sample possible.
The core is then cut into approximately equal halves along the marked sampling line by company staff using a coresaw with diamond impregnated saw blade. One half of the core is sent for analysis and the remaining half labelled and retained in core boxes for future reference. Cut core is placed into clean, new transparent plastic sample bags into which pre-printed sample tickets are placed. The laboratory places one of these tickets in the pulp bag and the other in the reject bag. A third sample ticket is stapled in the core tray along with the meterage represented by the sample. The fourth sample ticket remains in the sample tag book with the hole number and meterage marked.
Sealed sample bags are placed in rice sacks for shipment to the laboratory. A record is kept of all samples shipped.
All geochemical samples (Rock, Soil, Drillcore) are taken by company representatives as soon as possible from site directly to the company's regional offices in Kotamobagu, Palopo or Tobelo. Security guards are always present at each regional office, ensuring no unauthorised access to the samples.
At the Palopo and Halmahera Projects, samples are dispatched via commercial transport to PT Interteck Utama Services Laboraties in Cilandak Commerical Estate, Jakarta.
Samples from the Tanoyan and Anggrek Projects are dispatched via commercial transport to a sample preparation facility in the regional capital of Manado ( Jl Politeknik II, Kel Kairagi II, Manado). The facility is managed by PT Interteck Utama Services and run to best industry practice.
PT Intertek Laboratories PT Intertek Utama Services (IUS) is a subsidiary of the Intertek Group, controlled by FSTE 100 listed Intertek plc. Intertek is a major international testing, inspection and certification organization with over 1,000 laboratories + 26,000 staff worldwide.
Sample Preparation - Jakarta or Manado
Routine protocols include crushing to 2mm, splitting if greater than 1.5 Kg and fine pulverizing to 95% passing 75um using LM2 or RM 2000 ring mill pulverisers. Alternatively, splits up to 3.5Kg are pulverized in LM5 pulverisers to achieve 95% passing 106um.Every 20th pulp is sieved at 75um/ 150um to monitor the pulverizing effectiveness.
Sample Transfer - to Jakarta
For samples which are prepared in the Manado facility, pulps are boxed and wrapped then air couriered to Jakarta using airfreight couriers. Reliance's despatch orders and preparation sheets are included in each consignment.
Assay Procedures
Gold
A 50g pulp is used for rock, soil and diamond drillcore samples.
Samples are assayed using a Fire Assay scheme -- fusion with flux then dissolution in aqua regia followed by Atomic Absorption analysis. Samples exceeding 10ppm Au are re-assayed by fire assay fusion with a gravimetric finish.
Samples with visible gold are assayed using screen fire assay technique with samples screened at 75um. The entire oversize and duplicate undersize samples are fired and the weighted average is reported.
Silver
Samples pulps are dissolved in aqua regia followed by Atomic Absorption analysis. Samples exceeding 50ppm Ag are re-assayed by fire assay fusion with a gravimetric finish.
Non Precious Trace Elements
Multi-element analysis undertaken by ICP method following aqua regia dissolution.
QA / QC Laboratory Procedures
PT Interteck's Jakarta laboratory holds ISO accreditation for its Mineral, Environmental and Petroleum Laboratories for Chemical Testing under ISO 17025:2005 (General Requirements for the competence of testing and calibration laboratories) by the Komite Akreditasi Nasional (KAN).
Accreditation Number is LP-130-IDN, renewed 15 July 2010 (equivalent to NATA certification in Australia).
Routine quality control procedures for sample preparation include a 1 in 15 re-split at sample preparation stage, 1 in 20 samples undergo sieve analysis to monitor grind size and use of a barren wash is standard in both crushing and pulverising procedures.
The Jakarta laboratory uses the CCLAS LIMS system giving built-in sample tracking and quality control as well as automatic data capture from the instruments reducing risk of data entry errors. This is complimented by a barcode system.
Routine QC generated by the Laboratory Information Management System (LIMS) includes second splits at sample preparation stage, per batch of 50 samples are included 2 replicates, 2 reference standards and one blank. This forms the first pass QC after which supervisors select additional QC depending on first pass results, anomalies etc.
Check assays at a frequency of 1 in 15 will be done at Ultratrace Laboratory based in Perth, Australia.
