ATTRIBUTE SURVEY_YEAR CHANGE
altitude 1984 INTRODUCTION
country 1984 INTRODUCTION
date_monitoring_1st 1984 INTRODUCTION
date_monitoring_1st 2016 RENAME to date_monitoring_first
date_monitoring_last 1984 INTRODUCTION
depth 1984 INTRODUCTION
latitude 1984 INTRODUCTION
layer 1984 INTRODUCTION
longitude 1984 INTRODUCTION
other_observations 1984 INTRODUCTION
periods 1984 INTRODUCTION
plot 1984 INTRODUCTION
sampler 1984 INTRODUCTION
sampler 2010 DISCONTINUED
sampler_id 2011 INTRODUCTION
samplers 2011 INTRODUCTION
sampler_type 1984 INTRODUCTION
Sequence 1984 INTRODUCTION

ATTRIBUTE SURVEY_YEAR CHANGE
Al 1984 INTRODUCTION
alkalinity 1984 INTRODUCTION
Ca 1984 INTRODUCTION
Cl 2011 INTRODUCTION
conductivity 1984 INTRODUCTION
date_end 1984 INTRODUCTION
date_start 1984 INTRODUCTION
DOC 1984 INTRODUCTION
Fe 2011 INTRODUCTION
K 1984 INTRODUCTION
Mg 1984 INTRODUCTION
Mn 2011 INTRODUCTION
Na 2011 INTRODUCTION
N_NH4 2011 INTRODUCTION
N_NO3 1984 INTRODUCTION
other_observations 1984 INTRODUCTION
period 1984 INTRODUCTION
pH 1984 INTRODUCTION
plot 1984 INTRODUCTION
sample_id 2011 INTRODUCTION
sampler 1984 INTRODUCTION
sampler 2010 DISCONTINUED
sampler_id 2011 INTRODUCTION
sample_vol 2011 INTRODUCTION
Sequence 1984 INTRODUCTION
S_SO4 1984 INTRODUCTION
total_nitrogen 2011 INTRODUCTION

ATTRIBUTE SURVEY_YEAR CHANGE
Al_labile 1984 INTRODUCTION
Cd 1984 INTRODUCTION
Cl 1984 INTRODUCTION
Cl 2010 DISCONTINUED
Cr 1984 INTRODUCTION
Cu 1984 INTRODUCTION
date_end 1984 INTRODUCTION
date_start 1984 INTRODUCTION
Fe 1984 INTRODUCTION
Fe 2010 DISCONTINUED
Mn 1984 INTRODUCTION
Mn 2010 DISCONTINUED
Na 1984 INTRODUCTION
Na 2010 DISCONTINUED
Ni 1984 INTRODUCTION
N_NH4 1984 INTRODUCTION
N_NH4 2010 DISCONTINUED
other_observations 1984 INTRODUCTION
P 1984 INTRODUCTION
Pb 1984 INTRODUCTION
period 1984 INTRODUCTION
plot 1984 INTRODUCTION
sample_id 2011 INTRODUCTION
sampler 1984 INTRODUCTION
sampler 2010 DISCONTINUED
sampler_id 2011 INTRODUCTION
Sequence 1984 INTRODUCTION
Si 1984 INTRODUCTION
water 1984 INTRODUCTION
water 2010 DISCONTINUED
Zn 1984 INTRODUCTION

ATTRIBUTE SURVEY_YEAR CHANGE
control_chart_mean 2009 INTRODUCTION
control_chart_std 2009 INTRODUCTION
country 2009 INTRODUCTION
date_end 2009 INTRODUCTION
date_start 2009 INTRODUCTION
determination 2009 INTRODUCTION
Laboratory_ID 2009 INTRODUCTION
other_observations 2009 INTRODUCTION
parameter 2009 INTRODUCTION
percentage_within 2009 INTRODUCTION
percentage_within 2016 DISCONTINUED - will be submitted from ringtest db directly
percentage_within_requal 2009 INTRODUCTION
percentage_within_requal 2016 DISCONTINUED - will be submitted from ringtest db directly
plot 2009 INTRODUCTION
quantification_limit 2009 INTRODUCTION
requalification 2009 INTRODUCTION
requalification 2016 DISCONTINUED - will be submitted from ringtest db directly
ring_test_number 2009 INTRODUCTION
ring_test_number 2016 DISCONTINUED - will be submitted from ringtest db directly
ring_test_participation 2009 INTRODUCTION
ring_test_participation 2016 DISCONTINUED - will be submitted from ringtest db directly
sample_preparation 2009 INTRODUCTION
Sequence 2009 INTRODUCTION