1
Addendum
Quality Assurance Project Plan
Sequim-Dungeness Watershed Water Pollutant Concentration
Pilot Sampling Project
by
Edward Chadd, Clallam County Department of Community Development
Robert Knapp, Clallam County Department of Community Development
Carol Creasey, Clallam County Department of Community Development
Clallam County Department of Community Development
223 East 4th
Street, Suite 5
Port Angeles, Washington 98362-3015
September 2009
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Publication Information
Within a month of publication, this addendum will be available on Clallam County’s website at
http://www.clallam.net/streamkeepers/html/reports.asp. Go to the link labeled “Stormwater
Monitoring.”
The project plan that is amended by this document can be found at
http://www.clallam.net/streamkeepers/assets/applets/QAPP_Approved.pdf
All data gathered under this project will be available by January 2011 from these websites:
• Clallam County: http://www.clallam.net/streamkeepers/html/reports.asp, “Stormwater
Monitoring” link
• WA Dept. of Ecology: http://www.ecy.wa.gov/eim/
• U.S. Environmental Protection Agency: http://www.epa.gov/storet/dw_home.html
The overall project area is depicted in Figure 1 in the text. Specific sites and watercourses
intended for sampling are listed in Table 2 in the text.
For more information contact:
Robert Knapp
Clallam County Department of Community Development
223 E. 4th
St., Suite 5
Port Angeles, WA 98362-3015
360-417-2416
Clallam County Department of Community Development:
http://www.clallam.net/Departments/html/dept_dcd.htm
360-417-2321
Any use of product or firm names in this publication is for descriptive purposes only
and does not imply endorsement by the authors or their employers.
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Summary of Changes
Between December 24, 2008 and May 15, 2009 Clallam County sampled stormwater runoff at
ten sampling locations in the Sequim-Dungeness valley (See Sequim-Dungeness Watershed
Water Pollutant Concentration Pilot Sampling Project approved in December 2008). We plan to
resume sampling in October 2009, following our existing sampling plan with only minor
changes. Due to our late start last year, we were unable to capture the first storm of the rainy
season. This addendum states our plan to sample storm events early this storm season while
maintaining consistency with our data collected last season.
Changes include;
o Adding one new sampling location which is Dungeness Meadows
o Field sampling for turbidity using only a ratio turbidimeter and not a non-ratio meter
o Minor amendments to our lab QA sample such as eliminating analytical duplicates
o Minor amendments to our storm selection and qualification criteria to include snow-melt
o Schedule update to extend the sampling time period through November 2009
These changes are described in the next few paragraphs and highlighted in the text and tables.
New Sampling Location- Dungeness Meadows
Because of the multiplicity of land uses, potential pollution sources, and stormwater conveyances
in the project area, several study areas are involved, each designed to investigate particular
problems. Each study area is to be considered a sub-project. Figure 1 shows the locations of
these study areas/sub-projects: Agnew, Dungeness Meadows, Lotzgesell, East Sequim,
Meadowbrook, Eureka, and Safeway. We have selected the additional sampling location
(Dungeness Meadows) based on input from our sampling advisory committee. This site (Figure
2) will be sampled primarily to look for pesticides and herbicides and is now included in Table 2
*. Last May (2009), we sampled at two locations where pesticides were the parameters of
interest; the addition of this new site provides us three sites that we can compare during a single
storm event. Page ten of this document provides supporting text for the Dungeness Meadows site
selection.
Field Sampling with Ratio Turbidimeter
For this round of sampling, we will be using only a Hach (Model 2100P) ratio meter for all our
field measurements of turbidity and not both ratio and non-ratio (HF-scientific) meters. We have
completed data collection for side-by-side comparison of ratio and non-ratio turbidimeter with
over 340 side-by-side measurements. Provisional data analyses indicate that the non-ratio and
ratio meters provide similar reading through 100 NTU and then diverged at higher turbidity
levels as was predicted. Additionally, we found the Hach meter to be far easier to work with in
the field compared to the HF-Scientific non-ratio meter. The 2100P is the accepted instrument
used by WA Department of Ecology’s Environmental Assessment Program. Revised text is on
page 11.
*Note that table numbers in this document are non-sequential to retain the numbering of the
corresponding table in the original QAPP document for ease of comparison.
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Quality Assurance
Based on discussions with Stuart Magoon of Manchester Environmental Laboratory, we are
planning to have Manchester perform lab samples for quality assurance as specified in Table 6.
These lab procedures coupled with field replicates and blanks (Table 9 in the QAPP) will
provide us with sufficient QA/QC for a screening-level project.
Inclusion of Snow-melt to Qualification Criteria
Table 1 now includes the affects of snow-melt on runoff and steam stage. Therefore, we have
improved our wording in Table 1 to include snow-melt in the sample collection, selection, and
qualification criteria. Snow-melt induced runoff transports pollutants in a similar manner to
rainfall runoff and so we will treat them similarly.
Update of Schedule
We are extending the sampling period through November 2009 and Table 4 reflects the schedule
for completing field and laboratory work, data entry, and reports.
All other methods, procedures, and tasks shall follow the existing QAPP that was approved in
2008.
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Background/Problem Statement
Figure 1: Study area map.
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Experimental Design
Table 1. Sample collection, selection, and qualification criteria. (“Sampling rotation”
refers to the target interval between sample grabs, beginning with the first sample.)
Site/
basin
hydro-
logic
response
type
Flow
pre-
storm?
Ex-
ample
“Zero-
time”
defined as:
Sam-
pling
rota-
tion
inter-
val
1st
sam-
ple to
sub-
mit to
lab
2nd
sample
to
submit
to lab
3rd
sample
to
submit
to lab
Qualifying
storm **
Fast Y Large-
system
storm
sewer
Observable
flow
increase
30’ Pre-
“Zero-
time”
“Zero-
time” +
30’
“Zero-
time” +
60’
Enough
precipitation
or snow melt
to visibly
increase flow
Fast N Parking
lot
First runoff 30’ “Zero-
time”
+5-30’
1st
sample
+ 30’
Enough rain
or melt to
cause runoff
Medium Y Stream Observable
bank runoff
or stage rise
60’ Pre-
”Zero-
time”
a.s.a.p.
after
“Zero-
time”
Peak
stage
within
1st 12
hr*
0.05” in 12 hr
Medium N Dry
irrigation
ditch
Flow
adequate to
collect
samples
60’ “Zero-
time” +
30-60’
Peak
stage
within
1st 12
hr*
0.05” in 12 hr
Slow Y Pond
outflow
Observable
flow
increase
60’,
then 4
hr.
“Zero-
time” +
60’
Peak
flow
(visit
every 4
hr)
0.1” in 24 hr
Slow N Pond
outflow in
early fall
Observable
outflow
60’,
then 4
hr.
“Zero-
time” +
60’
Peak
flow
(visit
every 4
hr)
0.1” in 24 hr
*Exception—solids samples: collect at/near actual storm peak if possible.
** preceded by 48 hr of no measureable rainfall or melt induced stage rise
Study Areas, Sampling Sites, and Laboratory Parameters
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Table 2. Study areas, sites, and laboratory parameters for analysis. These study area and sites are tentative; see discussion above.
Seasonal timing codes: FF = first flush; LLS = larger, later storms; PLT = post-land-treatment; see “Experimental Design” above.
PAH = Polynuclear aromatic hydrocarbons; Pesticides = PESTMS (Pesticides mass spectrometry) + Herbicides Study area
Sampling site abbrevi-ation
Water-course name
So
urc
e/R
ece
ivin
g w
ate
r NHD Reach Code (if known)
If site is not on a stream, name (if known) of receiving water destination (if known)
NHD Reach Code (if known) of receiving water destination if known (if site is not on a stream)
Ide
al s
ea
so
na
l ti
min
g Hydro-
logic res-ponse time
Flow pre-storm?
Laboratory analytes:
Ba
cte
ria
(fe
ca
l c
oli
form
)
Nu
trie
nts
(N
H3
+
To
tal
P +
NO
2-N
O3
)
So
lid
s (
Su
sp
en
de
d
Se
dim
en
t C
on
c.)
Me
tals
(C
u +
Zn
+
Ha
rdn
es
s)
PA
H s
tan
da
rd lis
t
Pe
sti
cid
es
Pri
ori
ty P
oll
uta
nt
Me
tals
Agnew AgFnHall Agnew Ditch
S Strait of Juan de Fuca
PLT medium N Y Y Y N N Y N
D_Mead-ows
DngMead Spring Creek
R Dungeness River
PLT medium N Y Y Y N N Y N
Lotzgesell LotzWdck Lotzgesell Creek
R 17110020000636 PLT slow N N Y N N N Y N
E_Sequim HldWash Highland Ditch
S 17110020003288 Bell Creek 17110020002095 FF medium Y Y Y Y N N N N
E_Sequim BelBlake Bell Creek R 17110020002095 FF medium N Y Y Y Y* Y N Y
E_Sequim HldHpyVly Highland Ditch
S Johnson Creek 17110020000354 LLS medium Y Y Y Y N N N N
E_Sequim SqBayRd Highland Ditch
S FF fast N Y Y Y Y Y N N
Meadow-brook
MdwCr Meadow-brook Creek
R 17110020000832 LLS medium Y Y Y Y N N N N
Meadow-brook
MdwDtch Highland Ditch
S 17110020005418 Meadow-brook Creek
17110020000832 LLS medium N Y Y Y N N N N
Eureka EurWash Eureka Ditch
S LLS medium Y Y Y Y N N N N
Safeway SfwyCB Storm drain
S FF fast N Y Y Y Y Y N N
*At E_Sequim/BelBlake, the Priority Pollutant Metals suite (As, Ag, Sb, Be, Cd, Cr, Cu, Hg, Pb, Ni, Se, Tl, Zn) will also be analyzed, but only with one
sample per event, with timing described in Table 1 as “A.S.A.P after zero time.” (Budgetary considerations do not allow additional samples.)
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Figure 2 Dungeness Meadows study area
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Study Area: Dungeness Meadows (“D_Meadows”)
This study area focuses on the area surrounding the Dungeness Meadows residential
development. The development is composed of residential dwellings surrounding a private golf
course. Irrigation ditches and landscape water features convey Dungeness River water through
the development. The surrounding land uses include residences, roads, and the golf course. This
site was selected because of suspected pesticide application on the golf course and potential for
runoff transported pollutants.
Objectives of this study include:
• Characterizing storm-event concentrations of pollutants presumed most likely to be found in
Spring Creek, based on upslope land uses (see above).
• Comparing pollutant concentrations in this creek with those draining agricultural lands (see
Agnew study area in QAPP).
• Comparing pollutant concentrations in this creek with those of another site that drains a golf
course (see Lotzgesell study area in QAPP).
• Examining how pollutant levels differ during the course of a storm event, between the
beginning of stage rise and peak flow.
Site location and laboratory parameters to be analyzed (see Figure 2 for orthophoto view):
• DngMead: This site is on Spring Creek just downstream of Dungeness Meadows and just
before the outtake point for Sequim Prairie-Tri Irrigation Association. Water not drawn for
irrigation flows to the Dungeness River. Contributing land uses include residences, roads,
and the golf course.
o Bacteria; Nutrients; Solids; Pesticides
Scheduling
Table 4. Schedule for completing field and laboratory work, data entry, and reports.
Field and laboratory work
Field work completed November 2009
Laboratory analyses completed December 2009
Data review completed December 2010
Database entry
Personnel responsible for Entry into EPA
STORET, ECY Environmental
Information Management, and Clallam
County Water Resources databases
Edward Chadd/Lori DeLorm
Data uploaded to databases December 2010
Final report
Author lead Edward Chadd
Schedule
Draft due to advisory committee November 2010
Final report due on web December 2010
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Quality Objectives
Decision Quality Objectives
Table 6 shows the number and kind of laboratory QA samples for the project. These laboratory
analyses form the basis for quality assessment of project data.
Table 6. Number and Kind of Samples for Laboratory QA.
Parameter Laboratory
Control Sample
Standard Ref-
erence Material
Method
Blank
Matrix Spikes
& Spike
Duplicates
TR* PP metals 1/batch 1/batch 1/batch
1 each/batch Dissolved Copper
and Zinc 1/batch 1/batch 1/batch
Hardness 1/batch 1/batch
Nutrients 1/batch
Herbicides 1/batch 1/batch 1 each/batch
Pesticides 1/batch 1/batch 1 each/batch
PAH (std) 1/batch 1/batch 1/batch 1 each/batch
Fecal Coliform --- --- --- ---
SSC 1/batch 1/batch N/A
*Total Recoverable
Measurement Quality Objectives (MQOs) will be determined from data acceptance limits set by
the WA Dept. of Ecology’s Manchester Laboratory, as well as from laboratory case narratives.
Standard QC samples will be analyzed for metals, nutrients, pesticides, herbicides, PAH and
SSC. These will include field blanks to show background levels associated with the sampling
process, and replicates to indicate field variability. Laboratory QC sample including laboratory
control samples, standard reference material, method blanks, spike and spike duplicates will be
analyzed to show interference of the sample matrix.
Field-parameter measurement procedures
Turbidity will be measured with a ratio turbidimeter. Samples will be analyzed within 48 hours
of collection.
• Hach Model 2100P— Streamkeepers of Clallam County