Issue Date: November 22, 1995
Revision Date: January 11, 2001

SIR Monitor 
(originally listed as Environmental Management Technologies)

SIR Monitor


Certification Leak rate of 0.1 gph with PD = 99% and PFA = 1%. 
"If a method meets the requirement for detecting a leak rate of 0.1 gph, it will meet the requirement for 0.2 gph.", according to "Standard Test Procedures for Evaluating Leak Detection Methods: Statistical Inventory Reconciliation Methods", EPA/530/UST-90/007, June 1990, Section 7.2.3, page 30.
Leak Threshold 0.05 gph. 
A tank system should not be declared tight if the test result indicates a loss or gain that equals or exceeds this threshold.
Applicability Gasoline, diesel. 
Tank Capacity Maximum of 18,000 gallons.
Data Requirement Minimum of 90 days of product level and flow through data are required before making the first evaluation.
Following the first evaluation, subsequent evaluations are made based on minimum of 30 days of data.
Comments Not evaluated using data from manifolded tank systems. 
Of 41 data sets submitted for evaluation, 5 were inconclusive. 
Median monthly throughput of tanks evaluated was 14,600 gallons. 
Leak rates of 0.05, 0.1, and 0.2 gph were used in evaluation. 
Data sets evaluated were supplied by vendor.


SIR Monitor

Evaluator:  Nathan Adams,

665 Evergreen Dr.

Middle Tennessee State  University

Murfreesboro, TN 37128

Tel:  (615) 898-2644

Tel:  (615) 896-4723

Date of Evaluation:  11/05/92


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