WATER QUALITY LIABILITY DISCLAIMER AND FORMAT DESCRIPTION Disclaimer These data have been generated by State agencies under contract with the Department of the Interior and the Upper Midwest Environmental Sciences Center (UMESC). Although these data have been processed successfully on a computer system at the UMESC, no warranty, expressed or implied, is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. Error correction is a continuing process, and UMESC corrects data data errors routinely when a correct value can be determined. UMESC does not delete questionable data when the correct value cannot be determined, but attempts to mark such data with an appropriate flag. Users are strongly cautioned to check the accuracy of any data obtained and to report suspected values to UMESC. Methods, purposes, and conditions can vary dramatically among data-collecting efforts and these data should not be combined with other datasets from the UMESC or other sources unless the user fully understands the procedures and purposes used to create each set of data and can verify that data are comparable across sources. ------------------------------------------------------------------------------- WATER QUALITY TREND ANALYSIS DATA The Long Term Resource Monitoring Program (LTRMP) sampling effort has evolved steadily since its inception in 1988. FOREWARD Use of LTRMP Trend Data for Water Quality Monitoring The LTRMP performs basic limnological field measurements in the Upper Mississippi River System (UMRS). Correct interpretation of the resulting measurements requires that the user understand the design, intent, and history of the sampling effort. Some of the necessary information is provided below, but all users of LTRMP limnological data are strongly encouraged to read and understand the Water Quality section of the LTRMP Procedures Manual (Soballe et al. 1995), which describes in greater detail both historical and current procedures. This document is accessible by request from: Water Quality Coordinator Upper Midwest Environmental Sciences Center U.S. Geological Survey 2630 Fanta Reed Road La Crosse, WI 54603 USA Tel: (608) 781-6216, ext. 126 Fax: (608) 783-6066 ----------------------------------------------------------------------------- SUMMARY LTRMP Water Quality Sampling Design Three LTRMP field stations began taking limnological measurements in Pools 8, 13, and 26 of the Upper Mississippi River in the summer of 1988. Sampling in La Grange Pool of the Illinois River began in September 1989. A few months later (January 1990), LTRMP water quality sampling commenced in Pool 4 (Lake Pepin), and a year later (March 1991), sampling was begun on the open river reach near Cape Girardeau, Missouri. All six field stations have operated continuously since joining the LTRMP. As the LTRMP field stations have grown, the parameters measured in water quality monitoring have gradually expanded. From 1988 to 1991, the LTRMP limnological sampling effort was limited to a basic suite of field measurements that required no laboratory analysis. A limited suite of laboratory analyses was added to the water quality effort in 1991 (these samples were analyzed by the U.S. Army Corps of Engineers Waterways Experiment Station, in Vicksburg, Mississippi). In 1993, the LTRMP developed an interna analytical lab, and the list of parameters was further expanded. Some reduction in parameters is possible in 1996, but this decision is still pending. The basic design of the sampling effort was revised in 1993. From July 1988 through June 1993, the LTRMP performed weekly limnological measurements at 15-30 permanently fixed sampling locations in each study area. These sampling locations were chosen without randomization (or replicaton) to represent 23 general habitat types and typical river reaches in the UMRS. This approach did not meet the needs of the program, and in June 1993, a new sampling design was implemented which incorporated both fixed-site sampling (at a revised set of sampling sites on a bi-weekly basis), stratified random sampling (on a quarterly basis), and an expanded set of measurements. Fixed-site sampling is now used to monitor tributaries, headwaters, tailwaters, and other points of special interest. Randomized sampling is used to characterize broad aquatic (habitat) areas. Special care is required to combine current data with data from the period prior to this design change. Interpretation of the stratified random sampling data collected after June 1993 also requires additional information. Users are strongly encouraged to consult the LTRMP procedures manual(s) and UMESC staff to determine the applicability of these data to specific applications. ------------------------------------------------------------------------------ REFERENCES Soballe, D. M., R. Burkhardt, K. Lubinski, R. Burdis, T. Clemment, J. Fischer, L. Hodge-Richardson, L. Conaway, J. Frazier, D. Gould, M. Steuck, E. Ratcliff, M. Sitzes, S. Stenzel, and R. Wright. 1995. Long Term Resoure Monitoring Program Procedures: Water Quality Monitoring. U.S. Geological Survey, Biological Resources Divsion, Upper Midwest Environmental Sciences Center, La Crosse, Wisconsin (in press). ------------------------------------------------------------------------------ WATER COMMA DELIMITED FILE FORMAT ALL FIELDS ARE COMMA DELIMITED. DATE FIELDS ARE QUOTED IN MM/DD/YYYY FORMAT. MID-1993 DATA OR EARLIER IS SORTED BY DATE AND TIME, LOCATION CODE, AND SAMPLE DEPTH IN THAT ORDER. MID-1993 DATA OR LATER IS SORTED BY BARCODE ONLY. THE "FORMAT" COLUMN CONTAINS THE FOLLOWING FORMAT SPECIFIERS: "a": alpha character (always UPPER case); "b": a blank space; "blank": a missing value; "c": alpha character/symbol/digit; "c(xx)": character string where xx represents the maximum number of characters allowed; "9": any digit, 0 - 9; "MM/DD/YYYY": date format; "HH:MI": time format; FIELD NAME FIELD TYPE FIELD SIZE --------------------- ---------- ---------- FIELD STATION NUMBER Numeric 1 DATE Date 10 TIME Character 5 #SAMPLES Numeric 1 PROJECT CODE Character 5 BARCODE Numeric 8 LOCATION_CODE Character 7 DATA BLOCK CODE Character 7 WAVE HEIGHT Numeric 3 WAVE HEIGHT QF Character 1 WATER DEPTH Numeric 6,2 Z MAX Numeric 6,2 Z MAX QF Character 1 SECCHI Numeric 3 SECCHI QF Character 1 WAVE CODE Numeric 1 Z ICE Numeric 5,2 Z ICE QF Character 1 Z S ICE Numeric 3 Z S ICE QF Character 1 % ICE Numeric 3 % ICE QF Character 1 Z SNOW Numeric 5,2 Z SNOW QF Character 1 % SNOW Numeric 3 % SNOW QF Character 1 SITE TYPE Numeric 1 STRATUM TYPE Numeric 1 SUMMARY CODE Numeric 1 SUBSTRATE CODE Numeric 1 COVERAGE CODE Numeric 1 VEG DENSITY Numeric 1 VEG TYPE Character 1 METHOD Numeric 1 UTM ZONE Numeric 2 COORDINATES NORTH SOUTH Numeric 7 COORDINATES EAST WEST Numeric 7 GIS GRID ZONE Numeric 10,5 ZONE15 NORTH SOUTH Numeric 7 ZONE15 EAST WEST Numeric 7 FIELD DERIVED EASTING Numeric 7 FIELD DERIVED NORTHING Numeric 7 EMTC DERIVED EASTING Numeric 7 EMTC DERIVED NORTHING Numeric 7 ACCURACY Numeric 4,1 SAMPLE TYPE Character 1 STAGE READING Numeric 4,1 RECORDER CODE Character 4 CREW LEADER CODE Character 4 SAMPLE ROW NUMBER Numeric 1 Z Numeric 3,1 Z QF Character 1 SAMPLE DEPTH CODE Character 2 CALCULATED SAMPLE DEPTH CODE Character 2 TEMP Numeric 3,1 TEMP QF Character 1 DO Numeric 3,1 DO QF Character 1 PH Numeric 4,2 PH QF Character 1 TURB Numeric 4 TURB QF Character 1 COND Numeric 4 COND QF Character 1 VEL Numeric 3,2 VEL QF Character 1 DIR Numeric 3 DIR QF Character 1 SAMPLE BARCODE Character 8 FILTERED SNP Character 1 FILTERED NOX Character 1 FILTERED MET Character 1 FILTERED CL Character 1 FILTERED SS Character 1 FILTERED CHS Character 1 FILTERED CHF Character 1 UNFILTERED PYT Character 1 UNFILTERED TNP Character 1 REPORT CODE Numeric 1 SOLUBLE REACTIVE PHOSPHORUS Numeric 7,3 SOLUBLE REACTIVE PHOSPHORUS QF Numeric 3 TOTAL SOLUBLE PHOSPHORUS Numeric 7,3 TOTAL SOLUBLE PHOSPHORUS QF Numeric 3 TOTAL PHOSPHORUS Numeric 7,3 TOTAL PHOSPHORUS QF Numeric 3 TOTAL N Numeric 7,3 TOTAL N QF Numeric 3 TOTAL SOLUBLE N Numeric 7,3 TOTAL SOLUBLE N QF Numeric 3 SUSPENDED SOLIDS Numeric 8,2 SUSPENDED SOLIDS QF Numeric 3 ORGANIC MATTER Numeric 5,1 ORGANIC MATTER QF Numeric 3 CHLOROPHYLL A Numeric 8,2 CHLOROPHYLL A QF Numeric 3 PHAEOPHYTIN Numeric 8,2 PHAEOPHYTIN QF Numeric 3 AMMONIUM N Numeric 7,3 AMMONIUM N QF Numeric 3 NITRATE NITRITE Numeric 7,3 NITRATE NITRITE QF Numeric 3 SILICA Numeric 7,3 SILICA QF Numeric 3 DISSOLVED CALCIUM Numeric 7,3 DISSOLVED CALCIUM QF Numeric 3 DISSOLVED IRON Numeric 7,3 DISSOLVED IRON QF Numeric 3 DISSOLVED MANGENESE Numeric 7,3 DISSOLVED MANGENESE QF Numeric 3 DISSOLVED POTASSIUM Numeric 7,3 DISSOLVED POTASSIUM QF Numeric 3 CHLORIDE Numeric 8,3 CHLORIDE QF Numeric 3 VOLATILE SUSPENDED SOLIDS Numeric 8,2 CHLOROPHYLL FL1 Numeric 7,1 CHLOROPHYLL FLI1 Numeric 7,2 SODIUM Numeric 6,1 MAGNESIUM Numeric 6,1 SULFATE Numeric 6,1 HABITAT CLASS Character 5 INSTRUMENT CODE Character 8 CROSS LINK BARCODE Numeric 8 INSTRUMENT READING Numeric 4 INSTRUMENT READING QF Character 1 ------------------------------------------------------------------------------ HISTORICAL SUMMARY FIELD NAME YEARS USED -------------------- ---------------- FIELD STATION NUMBER 1988 - TO PRESENT DATE 1988 - TO PRESENT TIME 1988 - TO PRESENT #SAMPLES 1993 - TO PRESENT PROJECT CODE 1993 - TO PRESENT BARCODE 1993 - TO PRESENT LOCATION CODE 1988 - TO PRESENT DATA BLOCK CODE 1989 - TO PRESENT WAVE HEIGHT 1988 - TO PRESENT WAVE HEIGHT QF 1993 - TO PRESENT WATER DEPTH 1988 - TO PRESENT Z MAX 1988 - TO PRESENT Z MAX QF 1993 - TO PRESENT SECCHI 1988 - TO PRESENT SECCHI QF 1993 - TO PRESENT WAVE CODE 1993 - TO PRESENT Z ICE 1990 - TO PRESENT Z ICE QF 1993 - TO PRESENT Z S ICE 1993 - TO PRESENT Z S ICE QF 1993 - TO PRESENT % ICE 1990 - TO PRESENT % ICE QF 1993 - TO PRESENT Z SNOW 1990 - TO PRESENT Z SNOW QF 1993 - TO PRESENT % SNOW 1990 - TO PRESENT % SNOW QF 1993 - TO PRESENT SITE TYPE 1994 - TO PRESENT STRATUM TYPE 1988 - TO PRESENT SUMMARY CODE 1993 - TO PRESENT SUBSTRATE CODE 1993 - TO PRESENT COVERAGE CODE 1993 - TO PRESENT VEG DENSITY 1993 - TO PRESENT VEG TYPE 1993 - TO PRESENT METHOD 1993 - TO PRESENT UTM ZONE 1993 - TO PRESENT COORDINATES NORTH SOUTH 1993 - TO PRESENT COORDINATES EAST WEST 1993 - TO PRESENT GIS GRID CODE 1988 - TO PRESENT ZONE15 NORTH SOUTH 1988 - TO PRESENT ZONE15 EAST WEST 1988 - TO PRESENT FIELD DERIVED EASTING 1993 - TO PRESENT FIELD DERIVED NORTHING 1993 - TO PRESENT EMTC DERIVED EASTING 1993 - TO PRESENT EMTC DERIVED NORTHING 1993 - TO PRESENT ACCURACY 1993 - TO PRESENT SAMPLE TYPE 1992 - TO PRESENT STAGE READING 1993 - TO PRESENT RECORDER CODE 1993 - TO PRESENT CREW LEADER CODE 1988 - TO PRESENT SAMPLE ROW NUMBER 1992 - TO PRESENT Z 1988 - TO PRESENT Z QF 1993 - TO PRESENT SAMPLE DEPTH CODE 1988 - TO PRESENT CALCULATED SAMPLE DEPTH CODE 1988 - TO PRESENT TEMP 1988 - TO PRESENT TEMP QF 1993 - TO PRESENT DO 1988 - TO PRESENT DO QF 1993 - TO PRESENT PH 1991 - TO PRESENT PH QF 1993 - TO PRESENT TURB 1988 - TO PRESENT TURB QF 1993 - TO PRESENT COND 1988 - TO PRESENT COND QF 1993 - TO PRESENT VEL 1988 - TO PRESENT VEL QF 1993 - TO PRESENT DIR 1989 - TO PRESENT DIR QF 1993 - TO PRESENT SAMPLE BARCODE 1993 - TO PRESENT FILTERED SNP 1993 - TO PRESENT FILTERED NOX 1993 - TO PRESENT FILTERED MET 1991 - TO PRESENT FILTERED CL 1993 - TO PRESENT FILTERED SS 1993 - TO PRESENT FILTERED CHS 1993 - TO PRESENT FILTERED CHF 1993 - TO PRESENT UNFILTERED PYT 1993 - TO PRESENT UNFILTERED TNP 1993 - TO PRESENT REPORT CODE 1988 - TO PRESENT SOLUBLE REACTIVE PHOSPHORUS 1991 - TO PRESENT SOLUBLE REACTIVE PHOSPHORUS QF TOTAL SOLUBLE PHOSPHORUS 1991 - TO PRESENT TOTAL SOLUBLE PHOSPHORUS QF TOTAL PHOSPHORUS 1991 - TO PRESENT TOTAL PHOSPHORUS QF TOTAL NITROGEN 1991 - TO PRESENT TOTAL NITROGEN QF TOTAL SOLUBLE N 1991 - TO PRESENT TOTAL SOLUBLE N QF SUSPENDED SOLIDS 1991 - TO PRESENT SUSPENDED SOLIDS QF ORGANIC MATTER 1991 - TO PRESENT ORGANIC MATTER QF CHLOROPHYLL A 1991 - TO PRESENT CHLOROPHYLL A QF PHAEOPHYTIN 1991 - TO PRESENT PHAEOPHYTIN QF AMMONIUM N 1991 - TO PRESENT AMMONIUM N QF NITRATE NITRITE 1991 - TO PRESENT NITRATE NITRITE QF SILICA 1991 - TO PRESENT SILICA QF DISSOLVED CALCIUM 1991 - TO PRESENT DISSOLVED CALCIUM QF DISSOLVED IRON 1991 - TO PRESENT DISSOLVED IRON QF DISSOLVED MANGENESE 1991 - TO PRESENT DISSOLVED MANGENESE QF DISSOLVED POTASSIUM 1991 - TO PRESENT DISSOLVED POTASSIUM QF CHLORIDE 1991 - TO PRESENT CHLORIDE QF VOLATILE SUSPENDED SOLIDS 1991 - TO PRESENT CHLOROPHYLL FL1 1993 - TO PRESENT CHLOROPHYLL FLI1 1993 - TO PRESENT SODIUM 1994 - TO PRESENT MAGNESIUM 1994 - TO PRESENT SULFATE 1994 - TO PRESENT HABITAT CLASS 1988 - TO PRESENT INSTRUMENT CODE 2000 - TO PRESENT CROSS LINK BARCODE 2000 - TO PRESENT INSTRUMENT READING 2000 - TO PRESENT INSTRUMENT READING QF 2000 - TO PRESENT ------------------------------------------------------------------------------ FIELD DESCRIPTIONS FIELD STATION NUMBER Numeric code identifying the field station number. Listed below are the valid codes and their corresponding field station 1 = Lake City, MN 4 = Brighton, IL 2 = Onalaska, WI 5 = Jackson, MO 3 = Bellevue, IA 6 = Havana, IL DATE Date on which a sample collection was initiated. mm/dd/yyyy format, example April 1, 2000, is represented as 04/01/2000. TIME 2400-h (military) Central Standard Time (CST) at which a sample collection began. #SAMPLES Number of samples collected at the site location. PROJECT CODE Alphanumeric LTRMP project code. Format is A-nnn, where A is a letter describing project type and nnn is a special project number. Project types are as follows: M = RTA standardized resource monitoring B = HREP biological response monitoring E = Ad hoc exploratory sampling R = Special research project BARCODE Identifying barcode for water data sheets. LOCATION CODE Alphanumeric code for LTRMP Location Code having the format annn.na or YYFTNNN. Permanent fixed sites use the annn.na format where the leading a designates the river (M = Mississippi and I = Illinois), nnn.n is the river mile (recorded to the nearest 0.1 mile), and the trailing a is an alphabetic code for the relative lateral position across the floodplain. Random sites use the YYFTNNN format. This format is described below. YYYY = Year the site was visited F = Field station number of site (see FIELD STATION NUMBER description) T = Time period code site was visited. Valid codes are as follows: 1 = March thru May 2 = June thru August 3 = September thru November 4 = December thru February NNN = Site number derived from a sampling map or site list. DATA BLOCK CODE Old administrative field used to help identify the location and time of a collection sample (stopped using June 1993). WAVE HEIGHT Vertical distance between the highest and lowest point on a wave form, using the Beaufort wind/sea-state scale. WAVE CODE replaced this field in mid-1993. WAVE HEIGHT QF Wave height measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional WATER DEPTH The vertical distance (to the nearest 0.1 m) between the substrate and the free water surface or, if ice exists, the vertical distance between the substrate and the lower surface of the ice. The same as ZMAX (see Below) when ice is not present. ZMAX The vertical distance (to the nearest 0.1 m) between the substrate and the free water surface. Same as Water Depth (see above) when ice is not present. Zmax is recorded as zero when the water is frozen to the substrate (no free water surface exists or cannot be reliably determined). Z MAX QF Water depth measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional SECCHI The vertical distance below the water surface at which a secchi disk disappears from view. Recorded in centimeters. SECCHI QF Secchi measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional WAVE CODE Visual determination of wave type using the Beaufort scale. Valid codes are as follows: 0 = Glass 1 = Ripple 2 = Wavelet 3 = White caps 4 = Rough Z ICE Vertical thickness of ice. Only the portion of the frozen block that represents the water column within the ice block is measured as ice depth. Reported in centimeters. Z ICE QF Ice thickness measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional Z S ICE Submerged thickness of ice measured to the nearest centimeter. Not recorded until mid-1993. Z S ICE QF Submerged ice thickness measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional % ICE Estimate of the percentage of water surface covered by ice within a 200 meter radius of the collection site. % ICE QF Ice percentage measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional Z SNOW Vertical thickness of snow on the ice reported in centimeters. Z SNOW QF Snow thickness measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional % SNOW Estimate of the percentage of water surface covered by snow within a 200 meter radius of the collection site. % SNOW QF Snow percentage measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional SITE TYPE Identifies the physical type of collection site. Valid types are as follows: 0 = Primary 1 = Alternate 2 = Fixed 3 = Other STRATUM TYPE Aquatic area/Land use description code for the collection site. Valid codes are as follows: 1 = Main channel 2 = Side channel 3 = Backwater area contiguous to the main channel 4 = Lake Pepin or Swan Lake 5 = Impounded 6 = Isolated 7 = New Terrestrial SUMMARY CODE Circumstances surrounding the decision to accept or reject a site sample (replaced by QF codes in mid-1993). Valid codes are as follows: 1 = One or more of the data values for this site sample are suspected or known to be in error. 2 = Possible equipment malfunction. 3 = Data potentially non-representative of that habitat type due to local, short-term conditions. 4 = Post-entry data analysis suggests that this observation may be atypical, but no reporting or transcription errors have been identified. 5 = No apparent problems. SUBSTRATE CODE A qualitative description code of substrate sediments. Started in mid-1993. Valid codes are as follows: 0 = Clay 1 = Silt 2 = Silt/Clay/Sand 3 = Sand 4 = Hard COVERAGE CODE Determination of the relative abundance of emergent and submergent aquatic vegetation, estimated as a percent. Valid codes are as follows: 0 = 0% 1 = 1 - 19% 2 = 20 - 49% 3 = >50% VEG DENSITY Subjective visual determination of the relative density of emergent and submergent aquatic vegetation. Valid codes are as follows: 1 = Sparse 2 = Dense VEG TYPE Determination of the type of emergent and/or submergent aquatic vegetation. Valid codes are as follows: S = Submergent E = Emergent F = Floating B = Both submergent and emergent METHOD Numeric code specifying the method used to locate the collection site, as follows: 1 = UTMs recorded from cross-reference between base map and site features 2 = UTMs recorded from GPS device (Magellan) 3 = Latitude (N/S coordinates; degrees, minutes, seconds) and longitude (E/W coordinates; degrees, minutes, seconds) recorded from GPS (Loran) 4 = Latitude and longitude recorded from cross-reference between base map and site features 5 = Differential GPS UTM ZONE Numeric field to record Global Positioning System (GPS) zone. LTRMP data resides in either zone 15 or 16. COORDINATES NORTH SOUTH Universal transverse mercator (UTM) northing coordinate for a water quality sampling site (in meters). Proper interpretation of this coordinaterequires reference to the appropriate UTM zone (15 or 16 for LTRMP). This is the initially assigned and registered UTM northing for an LTRMP sampling site. COORDINATES EAST WEST Universal transverse mercator (UTM) easting coordinate for a water quality sampling site (in meters). Proper interpretation of this coordinate requires reference to the appropriate UTM zone (15 or 16 for LTRMP). This is the initially assigned and registered UTM easting for an LTRMP sampling site. GIS GRID CODE Modified and concatenated utm coordinate pair used to generalize site locations within a 50 square meter area. ZONE15 NORTH SOUTH Universal transverse mercator (UTM) northing coordinate for a water quality sampling site (in meters) referenced to a single UTM zone (15). This value is calculated from coordinates_east_west and is particularly useful for LTRMP areas that include both UTM zone 15 and UTM zone 16. ZONE15 EAST WEST Universal transverse mercator (UTM) easting coordinate for a water quality sampling site (in meters) referenced to a single UTM zone (15). This value is calculated from coordinates_east west and is particularly useful for LTRMP areas that include both UTM zone 15 and UTM zone 16. FIELD DERIVED EASTING Universal transverse mercator (UTM) easting coordinate for a water quality sampling site (in meters) as reported from the field. Proper interpretation of this coordinate requires reference to the appropriate UTM zone (15 or 16 for LTRMP). LTRMP procedures call for a value in this field only when a sample is collected at a location that differs significantly from the pre-assigned or registered coordinates. FIELD DERIVED NORTHING Universal transverse mercator (UTM) northing coordinate for a water quality sampling site (in meters) as reported from the field. Proper interpretation of this coordinate requires reference to the appropriate UTM zone (15 or 16 for LTRMP). LTRMP procedures call for a value in this field only when a sample is collected at a location that differs significantly from the pre-assigned or registered coordinates. UMESC DERIVED EASTING Universal transverse mercator (UTM) easting coordinate for a water quality sampling site (in meters) as preassigned by UMESC. Proper interpretation of this coordinate requires reference to the appropriate UTM zone (15 or 16 for LTRMP). UMESC preassigns coordinates for stratified random sampling (SRS) only. For SRS sites, this coordinate is also the initial assignment for Coordinates east west. UMESC DERIVED NORTHING Universal transverse mercator (UTM) northing coordinate for a water quality sampling site (in meters) as preassigned by UMESC. Proper interpretation of this coordinate requires reference to the appropriate UTM zone (15 or 16 for LTRMP). UMESC preassigns coordinates for stratified random sampling (SRS) only. For SRS sites, this coordinate is also the initial assignment for Coordinates north south. ACCURACY Numeric field to record a measure of positioning accuracy. Record Percent Dilution of Precision (PDOP) from GPS devices and the following codes for base map cross-reference and revisits to marked fixed sites: 000.1 = Almost certain accuracy within 100 m because of immediate proximity to uniquely identifiable features (undisturbed marker, wing dam, day mark, etc.). 000.2 = High confidence of accuracy within 100 m because of agreement between general site appearance and identifiable features on a base map. 000.3 = Other than above. SAMPLE TYPE Indicates the types of samples collected. Valid codes are as follows: Blank = Normal sampling 1 = QA sampling STAGE READING The height of the water surface above the National Geodetic Vertical Datum, and is controlled by dam operations. Measured in feet. RECORDER CODE Alphanumeric field to identify the LTRMP recorder responsible for recording of this data. These codes are permanently assigned to LTRMP staff at each station. CREW LEADER CODE Alphanumeric field to identify the LTRMP Crew Leader responsible for recording of this data. These codes are permanently assigned to LTRMP staff at each station. SAMPLE ROW NUMBER Numeric field to identify, isolate, and sort individual detail records. Z The vertical distance (to the nearest 0.1m) between the free water surface and the point of sample collection or ambient measurement. When ice is present, the following conventions are used to record Z: (1) samples collected more than 25 cm below the bottom of the ice are assigned a z value in the usual manner as described above, (2) samples collected 16-25 cm below the ice are assigned a z value of 0.2 m. (3) Samples collected between 0 and 14 cm below the ice are assigned a z value of 0.1m, and (4) samples collected above the lower level of the ice (i.e., in the access hole) are assigned a z value of zero. Z QF Sample depth measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional SAMPLE DEPTH CODE Subjective description of water depth at which sample depth was taken. Valid codes are as follows: SF = Surface MD = Middle BT = Bottom OT = Other CALCULATED SAMPLE DEPTH CODE Administrative field. Derived from comparing sample depth against Z MAX. Used as a comparison check against sample depth code. Valid codes are as follows: SF = Surface MD = Middle BT = Bottom OT = Other TEMP Water temperature for the sample measured in degrees Celsius. TEMP QF Water temperature measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional DO Amount of Dissolved Oxygen in the sample. Measured in milligrams/liter. DO QF Dissolved oxygen measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional PH pH measurement for the sample. Measured in pH units. PH QF pH measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional TURB Turbidity (water clarity) measurement for the sample. Measured in nephelometric turbidity to the nearest whole nephelometric techniques. TURB QF Turbidity measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional COND Conductivity (ability of the water to conduct an electric current) measurement for the sample. Measured to the nearest uS/cm. COND QF Conductivity measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional VEL Velocity of water current. Measured in meters per second. VEL QF Velocity measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional DIR Compass direction from which the water current is flowing. Measured in degrees. DIR QF Current direction measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional SAMPLE BARCODE Identifying barcode for a water sample to be used for future chemical analysis. FILTERED SNP Code to indicate if future chemical analysis is to be done for soluble nitrogen and phosphorus. Valid codes are as follows: Blank = No sample 1 = Sample OK 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample unrepresentative 7 = Sample possibly contaminated 8 = Sample Diluted A = Non-Standard Method H = Hold Time Exceeded X = Parameter Optional FILTERED NOX Code to indicate if future chemical analysis is to be done for nitrate and/or nitrite. Valid codes are as follows: Blank = No sample 1 = Sample OK 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample unrepresentative 7 = Sample possibly contaminated 8 = Sample Diluted A = Non-Standard Method H = Hold Time Exceeded X = Parameter Optional FILTERED MET Code to indicate if future chemical analysis is to be done for metals. Valid codes are as follows: Blank = No sample 1 = Sample OK 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample unrepresentative 7 = Sample possibly contaminated 8 = Sample Diluted A = Non-Standard Method H = Hold Time Exceeded X = Parameter Optional FILTERED CL Code to indicate if future chemical analysis is to be done for chloride. Valid codes are as follows: Blank = No sample 1 = Sample OK 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample unrepresentative 7 = Sample possibly contaminated 8 = Sample Diluted A = Non-Standard Method H = Hold Time Exceeded X = Parameter Optional FILTERED SS Code to indicate if future chemical analysis is to be done for suspended solids. Valid codes are as follows: Blank = No sample 1 = Sample OK 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample unrepresentative 7 = Sample possibly contaminated 8 = Sample Diluted A = Non-Standard Method H = Hold Time Exceeded X = Parameter Optional FILTERED CHS Code to indicate if future chemical analysis is to be done for spectrophotometric chlorophylla. Valid codes are as follows: Blank = No sample 1 = Sample OK 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample unrepresentative 7 = Sample possibly contaminated 8 = Sample Diluted A = Non-Standard Method H = Hold Time Exceeded X = Parameter Optional FILTERED CHF Code to indicate if future chemical analysis is to be done for fluorometric chlorophylla. Valid codes are as follows: Blank = No sample 1 = Sample OK 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample unrepresentative 7 = Sample possibly contaminated 8 = Sample Diluted A = Non-Standard Method H = Hold Time Exceeded X = Parameter Optional UNFILTERED PYT Code to indicate if future chemical analysis is to be done for phytoplankton. Valid codes are as follows: Blank = No sample 1 = Sample OK 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample unrepresentative 7 = Sample possibly contaminated 8 = Sample Diluted A = Non-Standard Method H = Hold Time Exceeded X = Parameter Optional UNFILTERED TNP Code to indicate if future chemical analysis is to be done for total nitrogen and phosphorus. Valid codes are as follows: Blank = No sample 1 = Sample OK 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample unrepresentative 7 = Sample possibly contaminated 8 = Sample Diluted A = Non-Standard Method H = Hold Time Exceeded X = Parameter Optional REPORT CODE Numeric code documenting the overall quality of a specific sample as described below: 1 = Gear failure; site may be re-sampled within time period 2 = Site cannot be sampled (i.e., site is dry or inaccessible) 3 = Sample collected under unusual environmental conditions 4 = Weighing equipment may be in error due to wind and waves 5 = Normally completed sample; all LTRMP procedures followed 6 = Non-critical gear modification (e.g., fyke net lead shortened) 7 = Pseudo-shoreline used for shoreline gear 8 = Minor gear damage or noncritical gear failure NOTE: The following chemical analysis fields (SOLUBLE REACTIVE PHOSPHORUS through CHLORIDE QF) are dependant on when or if chemical analysis is done on the sample. Chemical analysis is done after the other data has already been loaded into the system. Once chemical analysis is done and the chemical data received, it is then loaded into the appropriate fields. Hence, a water record which should have chemical data, (based on the presence of a sample barcode and the appropriate future chemical analysis codes) will not have chemical data if the lab results have not yet been received. SOLUBLE REACTIVE PHOSPHORUS Soluble reactive phosphorus measurement for the sample. Reported as milligrams of phosphorus per liter. SOLUBLE REACTIVE PHOSPHORUS QF Soluble reactive phosphorus measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method X = Parameter Optional C = Category Measurement TOTAL SOLUBLE PHOSPHORUS Total soluble phosphorus measurement for the sample. Measured in milligrams per liter. TOTAL SOLUBLE PHOSPHORUS QF Total soluble phosphorus measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method X = Parameter Optional C = Category Measurement TOTAL PHOSPHORUS The total amount of phosphorus (dissolved and particulate) in the sample determined using persulfate digestion. Reported as milligrams of phosphorus per liter. TOTAL PHOSPHORUS QF Total phosphorus measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method X = Parameter Optional C = Category Measurement TOTAL NITROGEN The total nitrogen concentration (dissolved and particulate) in the sample. Reported as milligrams of nitrogen per liter. TOTAL NITROGEN QF Total nitrogen measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method X = Parameter Optional C = Category Measurement TOTAL SOLUBLE N The total soluble nitrogen concentration for the sample. Measured in milligrams per liter. TOTAL SOLUBLE N QF Total soluble nitrogen measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method X = Parameter Optional C = Category Measurement SUSPENDED SOLIDS The total particulate material trapped by a glass fiber filter and dried at 105 degrees Centigrade. Reported as milligrams per liter. SUSPENDED SOLIDS QF Suspended solids measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method X = Parameter Optional C = Category Measurement ORGANIC MATTER Organic matter measurement for the sample. This is not yet measured and units have not yet been determined. ORGANIC MATTER QF Organic matter measurement quality factor code. This field is not yet used. CHLOROPHYLL A The concentration of photosynthetic pigment chlorophyll-a, corrected for phaeophytin as determined by the spectrophotometric technique using 90% acetone extraction. Measured in micrograms per liter. CHLOROPHYLL A QF Chlorophyll A measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method X = Parameter Optional C = Category Measurement PHAEOPHYTIN Phaeophytin is a degradation product of chlorophyll as detected by the spectrophotometric technique for the sample. Measured in milligrams per liter. PHAEOPHYTIN QF Phaeophytin measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method X = Parameter Optional C = Category Measurement AMMONIUM N The total amount of ammonia (ionized and non-ionized) for the sample. Measured in milligrams per liter. AMMONIUM N QF Ammonium N measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method X = Parameter Optional C = Category Measurement NITRATE NITRITE The total amount of nitrate plus nitrite for the sample. Measured in milligrams of nitrogen per liter. NITRATE NITRITE QF Nitrate Nitrite measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method X = Parameter Optional C = Category Measurement SILICA The total amount of silica for the sample. Measured in Si milligrams per liter. SILICA QF Silica measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method X = Parameter Optional C = Category Measurement DISSOLVED CALCIUM The total amount of calcium for the sample. Measured in milligrams per liter. DISSOLVED CALCIUM QF Calcium measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method X = Parameter Optional C = Category Measurement DISSOLVED IRON The total amount of iron for the sample. Measured in milligrams per liter. DISSOLVED IRON QF Iron measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method X = Parameter Optional C = Category Measurement DISSOLVED MANGENESE The total amount of mangenese for the sample. Measured in milligrams per liter. DISSOLVED MANGENESE QF Mangenese measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method X = Parameter Optional C = Category Measurement DISSOLVED POTASSIUM The total amount of potassium for the sample. Measured in milligrams per liter. DISSOLVED POTASSIUM QF Potassium measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method X = Parameter Optional C = Category Measurement CHLORIDE The total amount of chloride for the sample. Measured in milligrams per liter. CHLORIDE QF Chloride measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method X = Parameter Optional C = Category Measurement VOLATILE SUSPENDED SOLIDS The weight loss on combustion at 500 - 500 degrees Centigrade of the total suspended solids residue for the sample. Reported in milligrams per liter. CHLOROPHYLL FL1 Uncalibrated fluorometric chlorophyll. Values must be compared to spectrophotometric measurements of chlorophyll a (see above) to develop specific calibration factors. Approximate calibration equation is: Chlorophyll a = 1.9 + 0.9*FL1. Units of Chlorophyll and FL1 are both micrograms per liter. CHLOROPHYLL FLI1 Uncalibrated fluorometric reading after acidification - for determination of phaeophytin. Can be compared/combined with Chlorophyll FL1 (above) to assess phaeophytin concentration. SODIUM The concentration (milligrams/Liter) of sodium ions in the sample. MAGNESIUM The concentration (milligrams/Liter) of magnesium ions in the sample. SULFATE The concentration of sulfate (S04) ions in the sample expressed as milligrams per liter. HABITAT CLASS Alphabetic code LTRMP habitat class description: BWC-O = Backwater contiguous - open water BWC-V = Backwater contiguous - vegetated water BWI-O = Backwater isolated - open water BWI-V = Backwater isolated - vegetated water IMP-L = Impounded - lakelike IMP-O = Impounded - open water IMP-V = Impounded - vegetated water CBU = Main channel border unstructured CBW = Main channel border wingdam CTR = Main channel trough SCU = Side channel border unstructured SCT = Side channel trough TWB = Tailwater channel border TWW = Tailwater wingdam TRIB = Tributary TRBM = Tributary mouth Instrument Code Serial number of instrument used for sample readings Cross Link Barocde Barcode used to link Water Quality data to other LTRMP components Instrument Reading Sample collect instrument reading Instrument Reading QF Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional