T&B Systems staff has been providing audit services for surface and upper air meteorological measurements for well over 20 years, and as such, have developed efficient and technically sound audit methods for the wide variety of instrumentation in the field. Our systems and performance audit methods and reporting formats have become the standard in the industry and are in use by many organizations nationwide. In fact, we have trained many of the auditors and organizations who eventually become our competitors. What is key, however, is that we are on the forefront of the methods development, and this is particularly true of the sodar, radar and RASS audit methods.

What separates us from the competition, the clear advantage T&B Systems brings to our clients, is actually quite simple: the longstanding excellence and integrity of our staff, and our unsurpassed experience in the field. Consider the following:

· Two principal and one backup auditors provide over 80 years of collective experience in audits and meteorological measurements. Of these years, over half have been specifically focused on quality assurance audits of meteorological measurements.

· One of our project managers and senior auditors, Mr. Robert Baxter, essentially wrote the EPA guidelines for use in systems and performance audits of sodar, radar wind profiler and RASS systems. This expertise will provide our clients with the highest level of technical competence in the conduct of the audit services, and assures that our clients will obtain the most recent technically sound audit program available
· Our other senior auditor David Bush has managed the Quality Assurance (QA) function on a number of large-scale, multi-participant monitoring programs, and he himself has performed more than 400 audits. He is currently the QA Manager of the Children's Health Study, where his responsibilities include the review of health effects data in addition to air quality data. He has over 20 years experience with air quality and meteorological measurements, and in particular QA as it pertains to air quality and meteorological monitoring programs.

· For 8 years Mr. Baxter, alongside Mr. Tom Lockhart of Meteorological Standards Institute, conducted workshops on quality assurance for meteorological measurements. His expertise in QA has led the way in both the training of other auditors as well as those tasked with making the measurements. This knowledge is also passed on to those he audits in the field.

· The T&B Systems staff have been conducting upper-air audits continuously over the last couple of decades. During the last two years alone, over 40 audits of upper air systems have been conducted. And with our expansion, T&B Systems staff has conducted nearly 200 audits of radar, sodar and RASS systems and associated surface meteorological measurements.

Some recent and current projects include:

Sacramento Metropolitan Air Quality Management District / California Air Resources Board - Ozone and Meteorological Monitoring on Walnut Grove Tower
T&B Systems is monitoring simultaneous measurements of ozone and meteorological variables at five levels from the surface to 1600 feet on a 2000-foot television transmission tower 20 miles south of Sacramento, California. Monitoring is being conducted using long sample lines leading to each level and a unique measurement method using a single analyzer to sequentially make measurements at all five levels.

South Coast AQMD - Audits of the Surface and Upper-Air Meteorological Monitoring Network PAMS and Regulatory Monitoring Stations
T&B Systems is conducting systems and performance audits of the PAMS monitoring network and selected monitoring stations throughout the South Coast Air Basin. A total of 12 stations will be audited that include a full complement of surface and upper-air meteorological monitoring equipment. Surface instrumentation will include traditional sensors for measuring wind speed, wind direction, temperature, relative humidity, pressure, precipitation, solar and ultraviolet radiation as well as newer sonic anemometers. Upper air instrumentation will include 915 MHz radar wind profilers, Radio Acoustic Sounding Systems (RASS) and sodars.

Air Quality Districts - Routine External Quality Assurance Audits
T&B Systems conducts routine quality assurance audits for several air quality Districts. Currently, T&B Systems conducts quarterly audits of seven PSD air quality monitoring sites operated for the Santa Barbara County Air Pollution Control District and of the South Coast Air Quality Management District's 20-site PM2.5 network.

State of California Air Resources Board - Quality Assurance for the California Regional PM10/PM2.5 Air Quality Study (CRPAQS) and the Central California Ozone Study (CCOS)
The California Regional PM10/PM2.5 Air Quality Study (CRPAQS) was a multi-year program of meteorological and air quality monitoring, emission inventory development, data analysis, and air quality simulation modeling with an overall budget of more than $25 million. Monitoring for CRPAQS occurred between November 1999 and February 2001. Taking advantage of the CRPAQS effort, a second study, the Central California Ozone Study (CCOS) was conducted during the summer of 2000. The major objective of CCOS was to characterize conditions over the complete summer period, with an emphasis on periods with high ozone levels, using both project-specific data and routine observations. T&B Systems personnel were responsible for managing the external quality assurance program for the entire measurement and data processing effort for both studies. Included in the effort were extensive surface and upper air meteorological audits of a wide range of sensors. These sensors included standard surface measurements and a wide range of radar wind and RASS profilers, sodars and rawinsonde systems. An extensive air quality monitoring network was also established, with many sites operating state-of-the-art and prototype air monitoring equipment. For the two studies, over 30 meteorological monitoring sites (surface and upper air), 110 air quality monitoring sites, and 5 aircraft were audited. Combined, over 700 monitoring and measurement systems were audited, many of them twice during the study. T&B personnel conducted 90% of the audits.