Code of Federal Regulations Title 40. Protection of Environment § 40.63.9520 What procedures must I use to demonstrate initial compliance?

(1) Record the date and time of each mix batch.

(2) Record the identity of each mix batch using a unique batch ID, as defined in § 63.9565.

(3) Measure and record the weight of HAP solvent loaded into the solvent mixer for each mix batch.

(4) Measure and record the weight of HAP solvent recovered for each mix batch.

(5) If you use a solvent recovery system, you must determine the percent of HAP solvent discharged to the atmosphere for each mix batch according to Equation 1 of this section as follows:  (Eq. 1)

Where:

P_b = Percent of HAP solvent discharged to the atmosphere for each mix batch, percent;

S_rec = Weight of HAP solvent recovered for each mix batch, lb;

S_mix = Weight of HAP solvent loaded into the solvent mixer for each mix batch, lb.

(6) If you use solvent substitution for a mix batch, you must record the use of a non-HAP material as a substitute for a HAP solvent for that mix batch and assign a value of 0 percent to the percent of HAP solvent discharged to the atmosphere for that mix batch (Pb).

(7) Determine the 7–day block average percent of HAP solvent discharged to the atmosphere according to Equation 2 of this section as follows:

Where:

%P₇ = 7–day block average percent of HAP solvent discharged to the atmosphere, percent;

i = mix batch;

n = number of mix batches in 7–day block average.

(8) Have valid data for at least 90 percent of the mix batches over the 7–day averaging period.