Code of Maine Rules
06 - DEPARTMENT OF ENVIRONMENTAL PROTECTION
096 - DEPARTMENT OF ENVIRONMENTAL PROTECTION - GENERAL
Chapter 130 - SOLVENT CLEANERS
Section 096-130-8 - Batch Vapor or In-line Solvent Cleaning Machine Complying with 7 Alternative Compliance Demonstration

A. On the first operating day of every month ensure that the solvent cleaning machine system contains only clean liquid solvent. This includes, but is not limited to, fresh unused solvent, recycled solvent and used solvent that have been cleaned of soils. A fill line must be indicated during the first month the measurements are made. The solvent level within the machine must be returned to the same fill-line each month, immediately prior to calculating monthly emissions as specified in Section 8. The solvent cleaning machine does not have to be emptied and filled with fresh unused solvent prior to the calculations.

B. Using the records of all solvent additions and deletions for the previous monthly reporting period, determine solvent emissions (E) using one of the following equations:

For cleaning machines with a solvent/air interface:

E = SA-LSR-SSR/AREA

where:

E = the total VOC solvent emissions from the solvent cleaning machine during the most recent monthly reporting period (kilograms of solvent per square meter of solvent/air interface area per month);

SA = the total amount of VOC liquid solvent added to the solvent cleaning machine during the most recent monthly reporting period (kilograms of solvent per month);

LSR = the total amount of VOC liquid solvent removed from the solvent cleaning machine during the most recent monthly reporting period (kilograms of solvent per month);

SSR = the total amount of VOC solvent removed from the solvent cleaning machine in solid waste during the most recent monthly reporting period (kilograms of solvent per month) determined from tests conducted using 40 CFR Part 60 Appendix A Method 25D or by engineering calculations included in the compliance report; and

AREA = the solvent/air interface area of the solvent cleaning machine (square meters).

For cleaning machines without a solvent/air interface:

E = SA - LSR - SSR

where:

E = the total VOC solvent emissions from the solvent cleaning machine during the most recent monthly reporting period 1, (kilograms of solvent per month);

SA = the total amount of VOC liquid solvent added to the solvent cleaning machine during the most recent monthly reporting period (kilograms of solvent per month);

LSR = the total amount of VOC liquid solvent removed from the solvent cleaning machine during the most recent monthly reporting period (kilograms of solvent per month); and

SSR = the total amount of VOC solvent removed from the solvent cleaning machine in solid waste during the most recent monthly reporting period (kilograms of solvent per month) determined from tests conducted using EPA reference method 25d or by engineering calculations included in the compliance report.

C. Determine the monthly rolling average, EA, for the 3-month period ending with the most recent reporting period using one of the following equations:

For cleaning machines with a solvent/air interface:

EA = (E1 + E2 + E3) / 3 where:

EA = the average VOC solvent emissions over the preceding 3 monthly reporting periods, (kilograms of solvent per square meter of solvent/air interface area per month).

E = VOC solvent emissions for each month (E1, E2, E3) for the most recent 3 monthly reporting periods (kilograms of solvent per square meter of solvent/air interface area).

E1 = the most recent monthly reporting period.

E2 = the monthly reporting period immediately prior to E1.

E3 = the monthly reporting period immediately prior to E2.

For cleaning machines without a solvent/air interface

EA = (E1 + E2 + E3) / 3

where:

EA = the average VOC solvent emissions over the preceding 3 monthly reporting periods (kilograms of solvent per month).

E = VOC solvent emissions for each month (E1, E2, E3) for the most recent 3 monthly reporting periods (kilograms of solvent per month).

E1 = the most recent monthly reporting period.

E2 = the monthly reporting period immediately prior to E1.

E3 = the monthly reporting period immediately prior to E2.