Please note that:  (a) Studies have shown that low-level, long-term air pollutants can be harmful.  (b) Low-level air pollutants that occur with groups of other low-level air pollutants can be harmful short term as well as long term.  (See "Synergistic" on our Glossary page.)  (c) Outdoor air pollutants often concentrate to higher levels indoors.  (d) The numbers in the "Results" column on the following lab reports should not be larger than the numbers in the corresponding 'Report Limit/RL/RDL/LOQ' column.  If any of the "Results" numbers are larger, pay special attention to those pollutants/analytes/substances.  You may start doing so by visiting our 'Resources to Search' tab.  (These instructions do not pertain to the "QC Batch Report" pages at the end of each lab report, which are only quality control results.)