Texas PM2.5 Sampling and Analysis Study: 1997-1998 Data Set Description ******************** The City of Houston, the Texas Natural Resource Conservation Commission, and the Houston Regional Monitoring Network sponsored sampling and analysis of PM2.5 samples taken over the course of one year, from 03/11/1997 to 03/12/1998. Objectives of the study were to determine the levels and chemical composition of PM2.5 in Houston and other cities in Texas and to determine the background levels and chemical composition of PM2.5 transported into Houston. During the sampling effort, 24-hour PM2.5 mass measurements were acquired from 15 sites throughout the state of Texas, using DRI's MEDVOL particle samplers. All of the Teflon filters were analyzed for mass by gravimetry and a selected subset of the Teflon and quartz fiber filters were subjected to full chemical analysis. These data files are in the NARSTO Data Exchange Standard Format. This format is described in detail in the NARSTO Data Management Handbook (ORNL/CDIAC-112) and is available at ([http://cdiac.esd.ornl.gov/programs/NARSTO/]). The Data Exchange Standard uses ASCII files that are self-documenting with numerical and character fields of varying length separated by commas (i.e., *.csv). MASS MEASUREMENT DATA This information relates only to the "PM2_5 Mass Measurements" table (not the table containing co-located measurements). Parameter names with corresponding units, missing value codes, and minimum and maximum values. Missing values have been excluded. LONG NAMES SHORT CAS UNITS MISSING MINIMUM MAXIMUM NAMES NUMBER CODES validation level valcod none none none none none station ID stnid none none none none none denuder denuder none none none none none AIRSSITEID airsid none none none none none particulate size pmsize none um none 0 0 fraction start date sdatel none yyyy/mm/ddnone 1997/03/11 1998/03/12 (local) start time stimel none hh:mm none 0:00 0:00 (local) time zone tzonel none none none none none (local) start date (UTC) sdateu none yyyy/mm/ddnone 1997/03/11 1998/03/12 start time (UTC) stimeu none hh:mm none 6:00 6:00 end date (local) edatel none yyyy/mm/ddnone 1997/03/11 1998/03/12 end time (local) etimel none hh:mm none 23:59 23:59 end date (UTC) edateu none yyyy/mm/ddnone 1997/03/12 1998/03/13 end time (UTC) etimeu none hh:mm none 5:59 5:59 time zone (UTC) tzoneu none none none none none teflon filter ID tid none none none none none quartz filter ID qid none none none none none teflon filter tid_f none none none none none flag quartz filter qid_f none none none none none flag PM2.5 mass flag PM2_5_f none none none none none teflon filter tvoc none m^3 none 0.0087 57.502 sample volume teflon filter tvo_u none m^3 none 0.0004 2.8751 sample volume uncertainty quartz filter qvoc none m^3 none 0.0089 57.502 sample volume quartz filter qvo_u none m^3 none 0.0004 2.8751 sample volume uncertainty PM2.5 mass PM2_5 none ug/m^3 -993.0374 33.6583 PM2.5_u PM2_5_u none ug/m^3 -990.3479 3.9332 comment cmnt none none none none none CHEMICAL MEASUREMENT DATA This information relates only to the "PM2_5 Measurements" table (not the table containing co-located measurements). Parameter names with corresponding units, missing value codes, and minimum and maximum values. Missing values have been excluded. LONG NAMES SHORT CAS NUMBERUNITS MISSING MINIMUM MAXIMUM NAMES CODES station ID stnid none none none none none validation valcod none none none none none level AIRSSITEID airsid none none none none none particulate pmsize none um none 0 0 size fraction start date sdatel none yyyy/mm/dd none 3/11/1997 3/12/1998 (local) start time stimel none hh:mm none 0:00 0:00 (local) time zone tzonel none none none none none (local) start date sdateu none yyyy/mm/dd none 3/11/1997 3/12/1998 (UTC) start time stimeu none hh:mm none 6:00 6:00 (UTC) time zone (UTC) tzoneu none none none none none end date edatel none yyyy/mm/dd none 3/11/1997 3/12/1998 (local) end time etimel none hh:mm none 23:59 23:59 (local) end date (UTC) edateu none yyyy/mm/dd none 3/12/1997 3/13/1998 end time (UTC) etimeu none hh:mm none 5:59 5:59 teflon minutes tsmplmin none min none 1278 1448 sampled quartz minutes qsmplmin none min none 1278 1449 sampled teflon filter tid none none none none none ID quartz filter qid none none none none none ID teflon filter tid_f none none none none none flag quartz filter qid_f none none none none none flag PM2.5 mass flag PM2_5_f none none none none none anion analysis anion_f none none none none none flag ammonium ion nh4ion_f none none none none none flag soluble sodium na_sol_f none none none none none flag soluble k_sol_f none none none none none potassium flag carbon analysis carbon_f none none none none none flag xrf analysis xrf_f none none none none none flag teflon filter tvoc none m^3 none 23.7615 31.392 sample volume teflon filter tvo_u none m^3 none 1.1881 1.5696 sample volume uncertainty quartz filter qvoc none m^3 none 23.6338 34.464 sample volume quartz filter qvo_u none m^3 none 1.1817 1.7232 sample volume uncertainty chloride ion cl_ion 16887-00-6ug/m^3 -99 0 1.6766 cl_ion_u cl_ion_u none ug/m^3 -99 0.024 0.1707 nitrate ion no3_ion 14797-55-8ug/m^3 -99 0 9.5136 no3_ion_u no3_ion_u none ug/m^3 -99 0.0258 0.7045 sulfate_ion so4_ion 14808-79-8ug/m^3 -99 0.5266 13.3943 so4_ion_u so4_ion_u none ug/m^3 -99 0.0417 0.8413 ammonium ion nh4_ion 14798-03-9ug/m^3 -99 0.1075 4.9449 nh4_io_u nh4_io_u none ug/m^3 -99 0.0217 0.2713 soluble sodium na_sol 7440-23-5 ug/m^3 -99 0 1.1815 na_sol_u na_sol_u none ug/m^3 -99 0.0066 0.0606 soluble k_sol 7440-09-7 ug/m^3 -99 0.0044 0.9852 potassium k_sol_u k_sol_u none ug/m^3 -99 0.0027 0.0548 orgainc carbon oc 7440-44-0 ug/m^3 -99 0 20.0523 oc_u oc_u none ug/m^3 -99 0.359 1.5146 elemental ec 7440-44-0 ug/m^3 -99 0.0638 7.8712 carbon ec_u ec_u none ug/m^3 -99 0.0395 0.5766 total carbon tc 7440-44-0 ug/m^3 -99 0.0348 27.8971 tc_u tc_u none ug/m^3 -99 0.3009 2.1672 Sodium Na 7440-23-5 ug/m^3 -99 0 0.4874 Na_u Na_u none ug/m^3 -99 0.0179 0.1478 Magnesium Mg 7439-95-4 ug/m^3 -99 0 0.2336 Mg_u Mg_u none ug/m^3 -99 0.0078 0.0552 Aluminum Al 7429-90-5 ug/m^3 -99 0 1.7678 Al_u Al_u none ug/m^3 -99 0.0056 0.0907 Silicon Si 7440-21-3 ug/m^3 -99 0.0139 3.9327 Si_u Si_u none ug/m^3 -99 0.0042 0.1974 Phosphorous P 7723-14-0 ug/m^3 -99 0 0.049 P_u P_u none ug/m^3 -99 0.0019 0.0204 Sulfur S 7704-34-9 ug/m^3 -99 0.2272 5.0226 S_u S_u none ug/m^3 -99 0.0118 0.2515 Chlorine Cl 7782-50-5 ug/m^3 -99 0 1.8412 Cl_u Cl_u none ug/m^3 -99 0.0056 0.0937 Potassium K 7440-09-7 ug/m^3 -99 0.0131 0.9834 K_u K_u none ug/m^3 -99 0.0032 0.0499 Calcium Ca 7440-70-2 ug/m^3 -99 0.0118 3.4673 Ca_u Ca_u none ug/m^3 -99 0.0033 0.1738 Titanium Ti 7440-32-6 ug/m^3 -99 0 0.1361 Ti_u Ti_u none ug/m^3 -99 0.0153 0.0283 Vanadium V 7440-62-2 ug/m^3 -99 0 0.0305 V_u V_u none ug/m^3 -99 0.0066 0.0144 Chromium Cr 7440-47-3 ug/m^3 -99 0 0.0261 Cr_u Cr_u none ug/m^3 -99 0.0016 0.0046 Manganese Mn 7439-96-5 ug/m^3 -99 0 0.0363 Mn_u Mn_u none ug/m^3 -99 0.0011 0.0024 Iron Fe 7439-89-6 ug/m^3 -99 0.0061 1.3758 Fe_u Fe_u none ug/m^3 -99 0.0011 0.0689 Cobalt Co 7440-48-4 ug/m^3 -99 0 0.0149 Co_u Co_u none ug/m^3 -99 0.001 0.0219 Nickel Ni 7440-02-0 ug/m^3 -99 0 0.0088 Ni_u Ni_u none ug/m^3 -99 0.0007 0.0014 Copper Cu 7440-50-8 ug/m^3 -99 0 0.1803 Cu_u Cu_u none ug/m^3 -99 0.0004 0.0091 Zinc Zn 7440-66-6 ug/m^3 -99 0 0.1926 Zn_u Zn_u none ug/m^3 -99 0.0006 0.0097 Gallium Ga 7440-55-3 ug/m^3 -99 0 0.0012 Ga_u Ga_u none ug/m^3 -99 0.0014 0.0024 Arsenic As 7440-38-2 ug/m^3 -99 0 0.0714 As_u As_u none ug/m^3 -99 0.0015 0.01 Selenium Se 7782-49-2 ug/m^3 -99 0 0.0679 Se_u Se_u none ug/m^3 -99 0.0007 0.0036 Bromine Br 7726-95-6 ug/m^3 -99 0.0008 0.0486 Br_u Br_u none ug/m^3 -99 0.0006 0.0026 Rubidium Rb 7440-17-7 ug/m^3 -99 0 0.0022 Rb_u Rb_u none ug/m^3 -99 0.0006 0.0019 Strontium Sr 7440-24-6 ug/m^3 -99 0 0.0116 Sr_u Sr_u none ug/m^3 -99 0.0007 0.0013 Yttrium Y 7440-65-5 ug/m^3 -99 0 0.0012 Y_u Y_u none ug/m^3 -99 0.0009 0.0017 Zirconium Zr 7440-67-7 ug/m^3 -99 0 0.0165 Zr_u Zr_u none ug/m^3 -99 0.0009 0.0019 Molybdenum Mo 7439-98-7 ug/m^3 -99 0 0.0047 Mo_u Mo_u none ug/m^3 -99 0.0019 0.0035 Palladium Pd 7440-05-3 ug/m^3 -99 0 0.006 Pd_u Pd_u none ug/m^3 -99 0.0053 0.0092 Silver Ag 7440-22-4 ug/m^3 -99 0 0.0076 Ag_u Ag_u none ug/m^3 -99 0.007 0.0107 Cadmium Cd 7440-43-9 ug/m^3 -99 0 0.0156 Cd_u Cd_u none ug/m^3 -99 0.0069 0.0114 Indium In 7440-74-6 ug/m^3 -99 0 0.0061 In_u In_u none ug/m^3 -99 0.0091 0.0134 Tin Sn 7440-31-5 ug/m^3 -99 0 0.011 Sn_u Sn_u none ug/m^3 -99 0.0101 0.0174 Antimony Sb 7440-36-0 ug/m^3 -99 0 0.0236 Sb_u Sb_u none ug/m^3 -99 0.0105 0.0205 Barium Ba 7440-39-3 ug/m^3 -99 0 0.1041 Ba_u Ba_u none ug/m^3 -99 0.0419 0.0762 Lanthanum La 7439-91-0 ug/m^3 -99 0 0.0552 La_u La_u none ug/m^3 -99 0.0698 0.1015 Gold Au 7440-57-5 ug/m^3 -99 0 0.0023 Au_u Au_u none ug/m^3 -99 0.0024 0.0074 Mercury Hg 7439-97-6 ug/m^3 -99 0 0.0012 Hg_u Hg_u none ug/m^3 -99 0.0019 0.0031 Thallium Tl 7440-28-0 ug/m^3 -99 0 0.0014 Tl_u Tl_u none ug/m^3 -99 0.0018 0.005 Lead Pb 7439-92-1 ug/m^3 -99 0 0.138 Pb_u Pb_u none ug/m^3 -99 0.002 0.0075 Uranium U 7440-61-1 ug/m^3 -99 0 0.0011 U_u U_u none ug/m^3 -99 0.0018 0.003 sum of chemical sum_sp none ug/m^3 -99 1.1063 53.8706 species sum_sp_u sum_sp_u none ug/m^3 -99 0.4585 1.728 comment cmnt none none none none none