Day tank dilemma
Over at fab 86 an incident occurred where a batch
of HCl at pH 2 was accidentally prepared.
Unfortunately, however, it was desired to have
material of pH 3. To accomplish this conversion, the
shift decided to flow in acid of pH 4 all the while
emptying fluid from the well-mixed day tank at the
same rate. How long will this take?
Contributed by Paul Safier, Intel Corporation.