| Total requests for May 2012: 1,882 |
| Unique requests | Total requests | Query | Documents returned |
| 36 | 47 | r125 | 13,763 |
| 18 | 22 | test | 12,193 |
| 16 | 20 | certificate | 12,475 |
| 16 | 16 | 608 | 4,574 |
| 15 | 16 | Section 609 | 4,851 |
| 12 | 16 | hfc23 | 9,578 |
| 10 | 14 | 134a | 8,088 |
| 8 | 16 | R22a | 10,181 |
| 8 | 13 | cfc | 568 |
| 8 | 11 | 609 | 14,765 |
| 8 | 8 | permitted releases | 95 |
| 7 | 8 | smuggling stories | 11,425 |
| 7 | 8 | hcfc-22 | 12,011 |
| 6 | 10 | j2099 | 7,580 |
| 6 | 9 | R134a | 45 |
| 6 | 7 | Refrigerants | 12,250 |
| 6 | 6 | ozone depletion | 331 |
| 6 | 6 | lost card | 20 |
| 5 | 9 | r-410a | 65 |
| 5 | 7 | r410a | 304 |
| 5 | 7 | halon | 11,458 |
| 5 | 5 | gwp | 162 |
| 5 | 5 | Global Warming | 230 |
| 4 | 9 | record keeping | 16,296 |
| 4 | 7 | refrigerant log | 274 |
| 4 | 5 | ods | 351 |
| 4 | 5 | michal shepard | 5 |
| 4 | 5 | epa certification | 15,356 |
| 4 | 4 | SNAP | 20,413 |
| 4 | 4 | Fines | 185 |
| 4 | 4 | 422b | 32 |
| 3 | 9 | NC | 26,323 |
| 3 | 8 | training | 18,956 |
| 3 | 7 | r-22a | 12,672 |
| 3 | 6 | carbon tetrachloride | 1,128 |
| 3 | 4 | technician | 21,187 |
| 3 | 4 | sf6 | 18 |
| 3 | 4 | fm 123 | 17 |
| 3 | 4 | chlorinated solvents | 17,921 |
| 3 | 4 | 1-bromopropane | 2 |
| 3 | 3 | trichlorofluoromethane | 7 |
| 3 | 3 | r438a | 0 |
| 3 | 3 | novec | 5 |
| 3 | 3 | Montreal Protocol | 251 |
| 3 | 3 | hvac | 61 |
| 3 | 3 | fumigation | 156 |
| 3 | 3 | epa 608 | 159 |
| 3 | 3 | Enviro-Safe | 0 |
| 3 | 3 | cfc certification | 56 |
| 3 | 3 | ARI 740-1993 | 13 |
| 3 | 3 | 608 test results | 208 |
| 3 | 3 | 608 license | 32 |
| 2 | 5 | universal certification | 18,167 |
| 2 | 5 | es22a | 16,639 |
| 2 | 4 | refrigerant recovery forms | 20,559 |
| 2 | 4 | C2HFBr4 | 3 |
| 2 | 3 | what is the automotive temperature for 134a | 697 |
| 2 | 3 | study guides | 103 |
| 2 | 3 | small appliance | 89 |
| 2 | 3 | replace license | 36 |
| 2 | 3 | r-438A | 5 |
| 2 | 3 | proctor | 29,171 |
| 2 | 3 | MVAC Certification | 3 |
| 2 | 3 | cfs | 0 |
| 2 | 3 | center capasitation | 26,599 |
| 2 | 3 | 92101 | 1 |
| 2 | 3 | 76 FR 17488 | 4 |
| 2 | 3 | 609 exam | 25,397 |
| 2 | 3 | 11209 | 1 |
| 2 | 2 | what is the automotive presure for 134a | 40,976 |
| 2 | 2 | waco tx | 2 |
| 2 | 2 | Verification | 59 |
| 2 | 2 | universal | 35 |
| 2 | 2 | texas | 104 |
| 2 | 2 | section 609 certification | 55 |
| 2 | 2 | seattle | 10 |
| 2 | 2 | SAN JOSE CA. | 10 |
| 2 | 2 | replacement card | 21 |
| 2 | 2 | RECLAIM | 85 |
| 2 | 2 | rad | 44 |
| 2 | 2 | r-420 a | 4 |
| 2 | 2 | R404A | 2 |
| 2 | 2 | r2 refrigerant | 52 |
| 2 | 2 | R-22 log | 4 |
| 2 | 2 | R-134A | 55 |
| 2 | 2 | puron | 2 |
| 2 | 2 | propane | 69 |
| 2 | 2 | pentane | 7 |
| 2 | 2 | penalty | 117 |
| 2 | 2 | ozone depletion potential | 220 |
| 2 | 2 | MN | 36 |
| 2 | 2 | methyl bromide | 459 |
| 2 | 2 | MAC | 43 |
| 2 | 2 | Los Angeles Ca. | 15 |
| 2 | 2 | log sheet | 19 |
| 2 | 2 | kyoto protocol | 8 |
| 2 | 2 | kyoto | 8 |
| 2 | 2 | hydrofluorocarbons | 55 |
| 2 | 2 | hvac certification | 33 |
| 2 | 2 | hfa | 4 |
| 2 | 2 | Halon 1301 GWP | 11 |