Area by area isolated main problem to the kitchen (shit sampling off GIB). Despite sample site selection, suggestion to me, is a hidden smoker. One partner with a habit the other doesnt know about. If they were both using, you would expect to see it through the property.
Need to find a way of checking on previous Baselines. Can the Methwarehouse be used to trigger a check when the same street and city come up? The difference in sample sites had potential to trip the process up, albeit there was a work around if that had happened.