gb199

Hi everyone. Would appreciate some advice. I had some perc tests done to judge how large a soak away I required. These were done at a depth of 1.8m at the drainage companies suggestion. After completion of the tests I messaged some other drainage companies to get quotes for remedial work, and one stated that perc tests should not be deeper than 1m. Is this correct? What's the potential impact of going deeper than 1m?