The answer to number 3 is at odds with the views of other water companies who do not want barrier pipe used as a default in lieu of investigation because there is a cost implication to them once the new development is adopted for maintenance etc.
Some of the answers are somewhat contradictory when compared to the guidance document - its not the intention to force analysis of all 90 VOCs - these are just indicative of the chemicals that might be a problem, but then we're told that a reduced suite would contravene the guidance and these suites are mandatory.
A few labs have come back to me saying the VOC and sVOC suites cannot be analysed for except using clean media instruments so putting manky soils through these would likely destroy the instument - fairly expensive if each sample requires a new column and the machine recalibrated - a 10- week turnaround might be a problem
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