M1 Estimate is based on continuous monitoring data or
measurements for the EPCRA section 313 chemical. Added in reporting year 2007.
M2 Estimate is based on periodic or random monitoring
data or measurements for the EPCRA section 313 chemical. Added in reporting
year 2007.
M Estimate is based on monitoring data or
measurements for the EPCRA section 313 chemical. This code was replaced by M1
and M2 in reporting year 2007.
C Estimate is based on mass balance calculations,
such as calculations of the amount of the EPCRA section 313 chemical in streams
entering and leaving equipment.
E1 Estimate is based on published emission factors,
such as those relating release quantity to through-put or equipment type (e.g.,
air emission factors). Added in reporting year 2007.
E2 Estimate is based on site specific emission
factors, such as those relating release quantity to through-put or equipment
type (e.g., air emission factors). Added in reporting year 2007.
E Estimate is based published emission factors,
such as those relating release quantity to through-put or equipment type (e.g.,
air emission factors). This code was replaced by E1 and E2 in reporting year
2007.
O Estimate is based on other approaches such as
engineering calculations (e.g., estimating volatilization using published
mathematical formulas) or best engineering judgment. This would include
applying an estimated removal efficiency to a waste stream, even if the
composition of the stream before treatment was fully identified through
monitoring data.
X Invalid entry.
N Not Applicable.
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