Audit Standards, Sampling Media, and Equipment Support

ERG provides fully turnkey ambient monitoring services from network design and installation through sample analysis and data management.

Ultra-Pure Sampling Media

ERG purifies and certifies high-quality media for use in collecting environmental samples. Media prepared by ERG are of the highest purity and are guaranteed to conform to EPA quality specifications. Sampling media are prepared in either bulk quantities or pre-packaged into sampling cartridges. XAD-2® resin is cleaned using sequential Soxhlet extraction and controlled drying and exceeds EPA's blank and purity requirements.

Purified XAD-2® resin (bulk)
Purified XAD-2® resin packed in EPA Method 0010 sampling modules
Purified XAD-2® resin packed in TO-13A cartridges
Purified XAD-2® resin packed in TO-10 cartridges
DNPH solution for EPA Method 0011

Performance Evaluation Solutions in Glass Vials

ERG prepares solutions of EPA Reference Method analytes for performance evaluation standards following EPA-approved standard operating procedures. Solutions can be provided at either a single known concentration or prepared to cover a range of known concentrations.

EPA Method 6/8 (SO2)
EPA Method 7 (NOx)
EPA Method 12 (lead)
EPA Method 13A/13B (fluoride)
EPA Method 26/26A (HCl/Cl2)
EPA Method 29 (multiple trace metals)
EPA Method 24 (paint and Ink)
EPA Method 101/101A (mercury)

Materials Spiked on Filters

Certified solutions of known concentrations of target analytes are prepared and spiked onto pre-cleaned quartz or fiberglass filter media. Representative spiked filters are analyzed periodically from our inventory to ensure concentration stability and method compatibility. Representative cleaned filter media are also analyzed periodically to ensure they meet method blank requirements.

EPA-Approved Method 12 (lead)
EPA-Approved Method 29 (multiple trace metals)

Materials Spiked Into Cylinders or Canisters

Gases are mixed to known concentrations using ERG's proprietary transfill device and filled into either SUMMA®-polished canisters or into Scott high-pressure cylinders.

EPA-Approved Method 18 (volatile organic compounds)
EPA-Approved Method 25 (total non-methane hydrocarbons)
EPA-Approved Method TO-15A
EPA-Approved PAMS Ozone Precursors

Materials Spiked on Sampling Media

Known concentrations of selected organic compounds are spiked directly into either XAD-2®, Tenax®, or DNPH cartridges. Media are spiked using EPA-approved standard operating procedures. Rep-resentative samples from each lot of spiked media are periodically analyzed to ensure stability and compatibility with the method.

SemiVOST/EPA Method 0010 (semivolatile organic compounds)
VOST/EPA Method 0030 or 0031 (volatile organic compounds)
TO-11A cartridge
TO-13A cartridge (PAH)
TO-13A cartridge (selected EPA Method 8270 semivolatile organics)

Equipment Rental

ERG provides short-and long-term rental of specialized air sampling equipment.

These include:

15-Liter SUMMA®-passivated sampling canisters (pre-cleaned and blanked)
6-Liter SUMMA®-passivated sampling canisters (pre-cleaned and blanked)
Hexavalent chromium (Cr+6) ambient air samplers (ERG custom design)
Non-methane organic (NMOC) ambient air samplers
Carbonyl ambient air samplers (ERG custom design)
Urban air toxics (EPA Methods TO-14A/15) samplers (ERG custom design)
Volatile organic ambient air (AVOX) canister samplers (Methods TO-14A/15)
Hi-Vol total suspended particulate (TSP) samplers
GMW GSP-1 semivolatile organic samplers (EPA Methods TO-09/13A)
Combined Met One/Auto Met monitoring station
Veriflow regulators