Issue Date: November 22, 1995
Revision Date: June 25 2002

(originally listed as EnviroQuest Technologies Limited and later as Watson Systems, Inc.)

Watson SIRAS Software System Versions 2.0, 2.8.3


Certification Leak rate of 0.2 gph with PD = 99.999% and PFA = 0.01%
Leak rate of 0.1 gph with PD = 99.3% and PFA = 0.7%
Leak Threshold 0.1 for leak rate of 0.2 gph.
0.05 for leak rate of 0.1 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 30,000 gallons.
Size limits using an acceptable protocol for manifolded tank systems have not been determined.
Data Requirement Minimum of 30 days of usable product level and flow through data.
System Features Backup technical support for the end user was part of the service feature of these SIR versions and was provided through contract with Watson Systems, Inc.
Since these SIR versions are now owned by Veeder-Root, information, assistance, and technical support for these versions are at their discretion.
Comments Not evaluated for in-house use that is independent of vendor participation.
Not evaluated for manifolded tank systems using an acceptable protocol. 27% of data sets evaluated were from manifolded tank systems.
Of 56 data sets submitted for evaluation, 6 were not analyzed due to unusable data.
Median monthly throughput for tanks evaluated was 73,518 gallons.
Leak rates ranging from 0.0458 to 0.2500 gph were used in evaluation.
Data sets evaluated were supplied by evaluator.


Gilbarco/Veeder Root

Evaluator:  Midwest Research Institute

Attn: CMS Mailstop F-76

Tel: (816) 753-7600

7300 West Friendly Ave.

Date of Evaluation:  08/23/93

P.O. Box 22087  
Greensboro, NC 27420-2087  

Tel:  (800) 253-8054



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