| Total requests for Aug 2011: 2,868 |
| Unique requests | Total requests | Query | Documents returned |
| 47 | 69 | r134 | 4,156 |
| 20 | 24 | 22A | 3,656 |
| 17 | 18 | certification | 199 |
| 15 | 16 | test | 5,621 |
| 14 | 21 | 608 | 4,192 |
| 10 | 14 | CFR 608 | 7,319 |
| 10 | 12 | section 609 | 7,179 |
| 10 | 11 | 609 | 100 |
| 9 | 9 | practice test | 9,609 |
| 8 | 14 | refrigerant | 10,169 |
| 8 | 13 | hfc | 17,594 |
| 8 | 12 | Halon | 87 |
| 8 | 10 | r-134a | 44 |
| 8 | 8 | r134a | 48 |
| 7 | 10 | epa certification | 207 |
| 6 | 12 | ozone depletion | 259 |
| 6 | 12 | methyl bromide | 8,873 |
| 6 | 8 | hcfc | 113 |
| 5 | 7 | record keeping | 186 |
| 5 | 7 | epa test | 178 |
| 5 | 6 | fines | 174 |
| 5 | 6 | R-410A | 51 |
| 5 | 5 | florida | 184 |
| 5 | 5 | Freon | 20 |
| 5 | 5 | CALIFORNIA | 260 |
| 4 | 8 | freeze | 65 |
| 4 | 7 | forms | 25,041 |
| 4 | 6 | montreal protocol | 15,101 |
| 4 | 6 | cfc certificate | 39,039 |
| 4 | 5 | refrigerant log | 26 |
| 4 | 5 | ground level ozone | 1,217 |
| 4 | 5 | cfc | 273 |
| 4 | 4 | universal | 33 |
| 4 | 4 | r410a | 58 |
| 4 | 4 | ozone | 24,446 |
| 4 | 4 | TESTING LOCATIONS | 252 |
| 4 | 4 | Clean Air Act | 335 |
| 3 | 5 | voc | 18,640 |
| 3 | 5 | particulate matter | 19 |
| 3 | 5 | license | 40 |
| 3 | 5 | cmb | 0 |
| 3 | 5 | Aerosols | 17,135 |
| 3 | 4 | smuggling | 10 |
| 3 | 4 | reporting violations | 164 |
| 3 | 4 | r123 phase out | 7 |
| 3 | 4 | log | 38 |
| 3 | 4 | india | 57 |
| 3 | 4 | freon certificate | 7 |
| 3 | 4 | epa 608 | 313 |
| 3 | 4 | definition | 216 |
| 3 | 4 | AQI | 0 |
| 3 | 3 | test results | 260 |
| 3 | 3 | replacement card | 22 |
| 3 | 3 | r-12 phaseout | 28 |
| 3 | 3 | puron | 6 |
| 3 | 3 | propane | 57 |
| 3 | 3 | nPB | 8 |
| 3 | 3 | houston | 15 |
| 3 | 3 | history | 65 |
| 3 | 3 | fm200 | 8 |
| 3 | 3 | cfc test | 119 |
| 3 | 3 | ammonia | 77 |
| 3 | 3 | SNAP | 250 |
| 3 | 3 | REWARDS | 20 |
| 3 | 3 | R 441A | 81 |
| 3 | 3 | Ozone layer | 557 |
| 3 | 3 | HVAC | 42 |
| 2 | 9 | evacuation | 43 |
| 2 | 6 | lead | 7,494 |
| 2 | 6 | What happens to plants if the ozen layer is weak | 15,332 |
| 2 | 5 | 40 CFR PArt 82 | 37,255 |
| 2 | 4 | joanes roc epa universal | 0 |
| 2 | 4 | joanes Roc | 0 |
| 2 | 4 | interpretations | 288 |
| 2 | 4 | effects of ozone depletion | 28,371 |
| 2 | 4 | dallas tx | 12 |
| 2 | 4 | compressors | 99 |
| 2 | 4 | austin | 27,013 |
| 2 | 4 | HOUSTON TEXAS | 282 |
| 2 | 4 | ES12A | 26,499 |
| 2 | 4 | De minimis release | 10 |
| 2 | 4 | COlumbus OH | 57 |
| 2 | 4 | 63137 st louis mo | 37 |
| 2 | 3 | texas | 101 |
| 2 | 3 | sulfuryl fluoride | 3,832 |
| 2 | 3 | services | 433 |
| 2 | 3 | section 608 type II | 67 |
| 2 | 3 | refrigerant release | 195 |
| 2 | 3 | minnesota | 35 |
| 2 | 3 | leak rate calculations | 57 |
| 2 | 3 | esco | 28,402 |
| 2 | 3 | effect of ozone layer depletion | 138 |
| 2 | 3 | ac test | 71 |
| 2 | 3 | Type I | 340 |
| 2 | 3 | LEAK RATE | 61 |
| 2 | 3 | J2788 | 36 |
| 2 | 3 | Arlington Tx | 8 |
| 2 | 3 | 7558-79-4 | 0 |
| 2 | 2 | vienna | 17 |
| 2 | 2 | universal certificate | 13 |
| 2 | 2 | sulfur hexafluoride | 6 |