Begin METADATA documentation

METADATA Date: August 18, 2011

METADATA Contact: Jeffrey D. Martin

 U.S. Geological Survey 

 NAWQA Pesticide Synthesis Project

 5957 Lakeside Boulevard

 Indianapolis, IN 46278-1996

 voice: (317) 290-3333 x148

 fax: (317) 290-3313

 email: jdmartin@usgs.gov

METADATA Data Description: 

 Filename: modeled.gw.recov.txt

 Source: U.S. Geological Survey Data Series 630, appendix 4.

 URL http://pubs.usgs.gov/ds/630/

 The modeled recovery data provided herein are an UPDATED data set processed 

 similarly to that provided in--

 U.S. Geological Survey Scientific Investigations Report 2009-5189, Adjustment of Pesticide

 Concentrations for Temporal Changes in Analytical Recovery, 1992-2006

 URL http://pubs.usgs.gov/sir/2009/5189/
 Modeled recovery for 44 pesticides and 8 degradates in groundwater matrix spikes are 

 provided in this tab-delimited ASCII file.

 NOTE: This is a "row" format data file. Each row contains information about modeled recovery 

 for one pesticide for one day (Jan 1, 1992 to Dec 31, 2010 inclusive). 

 This data file contains 360,880 rows of data (excludes rows of METADATA comments, 1 row of 

 attribute labels, and 1 row of field descriptions). 

METADATA Basic documentation of data set elements:

 Data Attributes:

 spiketype 9s 

 pcode 5S 

 plname 25S 

 period 6S 

 sp 9N 

 predict 9N 

 dates 8D 

 dectime 9N 

 Note: The row in the data file that follows the row of attribute labels describes the 

 width of the field and the data type. S or s indicates a text attribute, 

 D or d indicates a date attribute, and N or n indicates a numeric attribute.
 For example: 15s indicates a 0- to 15-character text attribute, whereas

 9N indicates a 0- to 9-digit numeric attribute. Attribute labels may be longer

 than the width of the field.

 Attribute label: spiketype

 Attribute description: Type of spikes used for modeling recovery.

 Code Description

 gw Groundwater matrix spikes

 Attribute label: pcode

 Attribute description: Parameter code. The 5-digit number used to identify variables 

 in the U.S. Geological Survey (USGS) National Water Information System (NWIS).

 Attribute label: plname

 Attribute description: Common name of the pesticide or degradate.

 Attribute label: period
 Attribute description: Modeling period and technique.

 Code Description

 before Recovery for the time period before spikes. Recovery modeled by assigning 

 the lowess-modeled recovery on the date of the first spike to all previous dates.

 during Recovery for the time period of spikes (date of first spike through date

 of last spike). Recovery modeled by lowess.

 after Recovery for the time period after spikes. Recovery modeled by assigning 

 the lowess-modeled recovery on the date of the last spike to all subsequent dates.

 Attribute label: sp

 Attribute description: Lowess smoothing window. A smoothing window of 0.1 (10 percent) was used

 to model recovery for all pesticides except fipronil, fipronil sulfide,

fipronil sulfone, desulfinylfipronil amide, and desulfinylfipronil. A 

smoothing window of 0.25 (25 percent) was used to model recovery for these

five pesticides or degradates.

 Attribute label: predict
 Attribute description: Modeled recovery, in percent. 

 Attribute label: dates

 Attribute description: Date of modeled recovery, YYYYMMDD. 19920101 through 20101231.

 Attribute label: dectime

 Attribute description: Decimal date of modeled recovery.

End METADATA documentation