3
= 3
{scope}
\b[Original question.]
How would you examine a sample of water for (1) Lead, (2) Nitrates, (3) Organic matter ? Under what circumstances is water liable to contain each of these ?
= 3
{scope}
\b[Original question.]
How would you examine a sample of water for (1) Lead, (2) Nitrates, (3) Organic matter ? Under what circumstances is water liable to contain each of these ?