Sample, test and adjust ferric chloride batch FC-26-0210

What is going on

Reactor 2 is at the end of the reaction hold on ferric chloride batch FC-26-0210 and the panel operator is waiting for the laboratory result before the batch can be adjusted and transferred to tank T-206. Last week an outside operator was splashed while sampling because the glove cuff did not overlap the sleeve, so sampling protective equipment is under close attention. The specification for this grade sets iron content, free acid, specific gravity and insolubles bands. The first result usually needs a small acid or water adjustment, which the laboratory calculates and the panel operator applies before a resample. Patrick Nguyen wants the results in the shift log within 45 minutes of the sample arriving.

Your brief

Take the batch sample safely with the outside operator, test it to the methods, compare the results with the specification, calculate the adjustment required, advise the panel operator under the batch procedure, resample after adjustment and record the results and the release in the shift log.

Work through it

You do not need to do it all. Doing a few of these will show you what the work is like. Your ticks and notes stay on this device.

• Read the ferric coagulant batch reaction and adjustment procedure and the sampling section of the health, safety and environment policy, and check the specification sheet for the grade.
• Prepare the sampling protective equipment with the cuff over the sleeve, face shield and respirator, and check the sample point valve, drain and emergency shower with Tahlia Brennan before sampling.
• Take the batch sample using the sample procedure, label it with batch number, time and sampler, and deliver it to the laboratory.
• Run the iron content, free acid, specific gravity and insolubles tests using the laboratory methods and record the raw results on the batch sheet.
• Compare the results with the specification bands and calculate the adjustment quantity of acid or water required, showing the calculation.
• Advise the panel operator of the adjustment under the procedure and record the advice in the shift log as a sample result entry.
• After the adjustment, take and test the resample, confirm all results are within specification and record the batch pass and the transfer authorisation in the shift log.

What someone in this role would produce

• Completed batch sheet with raw results and adjustment calculation
• Shift log entries for the first sample, the adjustment advice and the resample
• Sampling protective equipment check note
• Batch release entry authorising transfer