supproting information, study 299, fy16-17 for the supporting information, study 299, fy16-17...

Index for the Supporting Information, Study 299, FY16-17

Appendix I. Protocol Study

Appendix II. Sampling Site Information

Appendix III. Water Quality Data

Appendix IV. Water and Sediment Monitoring Data

Appendix V. Aquatic Toxicity Data

Appendix VI. Analytical Methods

Department of Pesticide Regulation Environmental Monitoring Branch

1001 I Street Sacramento, CA 95812

STUDY 299: Ambient and Mitigation Monitoring in Urban Areas in Northern California. FY 2016/2017

Michael P. Ensminger September 2016

1.0 INTRODUCTION The Surface Water Protection Program (SWPP), Environmental Monitoring Branch of the California Department of Pesticide Regulation (CDPR) has monitored urban runoff in Northern California since 2007 (Kelley, 2007). This monitoring has helped define pesticide runoff patterns from urban neighborhoods and watersheds (Ensminger et al., 2013; Budd et al., 2015). Urban pesticide use remains high (CDPR, 2013a), pesticides occur frequently in urban runoff (Budd et al., 2015; Weston and Lydy, 2014; Ensminger et al., 2013; Gan, 2012), and many urban waterbodies do not meet water quality standards (State Water Resources Control Board, 2015).These facts justify the need to further monitor the states waterways.

This study is a continuation of CDPRs urban monitoring in Northern California (Ensminger, 2015). SWPP will continue to evaluate sources of pesticide runoff, monitor larger urban watersheds, and evaluate toxicity and mitigation methods. In FY16/17 some changes to monitoring frequency, site locations, and pesticides of interest have been made. Data from this study will be used to evaluate urban pesticide water quality trends.

2.0. OBJECTIVES For Study 299 (FY16-17), Northern California urban monitoring, the objectives are:

1) Identify the presence and concentrations of pesticide contamination in urban waterways; 2) Increase the spatial distribution of urban monitoring by monitoring at the watershed level; 3) Determine the toxicity of water samples at selected monitoring sites; 4) Evaluate the effectiveness of a stormwater retention (or water quality) pond to reduce

pesticides from urban runoff; 5) Evaluate the magnitude of measured concentrations relative to water quality or aquatic

toxicity thresholds; and 6) Evaluate the effectiveness of CDPRs surface water regulation Section 6970 through long

term (multi-year) monitoring at selected sampling locations.

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3.0 PERSONNEL The study will be conducted by staff from the CDPRs Environmental Monitoring Branch, Surface Water Protection Program (SWPP), under the general direction of Kean S. Goh, Ph.D. Environmental Program Manager I (Supervisory). Key personnel are listed below:

Project Leader: Michael Ensminger, Ph.D. Field Coordinator: Kevin Kelley Reviewing Scientist: Robert Budd, Ph.D. Statistician: Dan Wang, Ph.D. Laboratory Liaison: Sue Peoples Analytical Chemistry, water: Center for Analytical Chemistry, California Department of Food and Agriculture (CDFA)

Analytical Chemistry, sediment: California Department of Fish and Wildlife Collaborator: Lorence Oki, Ph.D., University of California at Davis, CE Assistant Specialist, Landscape Horticulture, Department of Environmental Horticulture, Phone: (530) 754-4135, Email: [email protected]

Please direct questions regarding this study to Michael Ensminger, Senior Environmental Scientist (Specialist), at (916) 324-4186 or [email protected].

4.0 STUDY PLAN 4.1 Monitoring sites. Ambient surface water monitoring will occur in the Sacramento and San Francisco Bay areas (SFB). Monitoring sites are selected to determine presence of pesticide runoff and pesticide contamination at the urban watershed level. In keeping with this last goal, the Northern California monitoring program will begin to look at additional receiving water sites at the mouth of urban watersheds.

In the Sacramento area, four long-term monitoring sites have been established in Roseville at three stormdrain outfalls and at one downstream sampling site in the Pleasant Grove Creek Watershed (Appendix 1). The Roseville sites have been sampled since 2008, providing a baseline for observing trends. Also in Roseville, one additional receiving water site (PGC058) will be added during rainstorm events and compared to the more upstream receiving water site (PGC040). PGC058 is ponded or dry in late spring and summer months. However, it is the furthest urban downstream monitoring site for Pleasant Grove Creek watershed. PGC058 is also a SPoT monitoring site (SWAMP, 2016) and has briefly been sampled in CDPRs urban monitoring program in 2011. In water samples, 2,4-D, dicamba, bifenthrin, and imidacloprid have been previously detected at PGC058.

Also in the Sacramento area, Arcade Creek will be monitored, albeit at an upstream site due to safety and flow issues at the Norwood site (Figure 1; Appendix 1). The Arcade Creek site on Del Paso is the furthest downstream site in the Arcade Creek watershed that is not affected by backup due to the Natomas Drain and Sacramento River.

Monitoring sites in SFB will center on Alameda, Contra Costa, and Santa Clara counties, where total use of monitored pesticides is high (CDPR, 2013a). Monitoring will occur at the watershed level (rather than storm drain level) to further characterize watershed pesticide pollution.

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mailto:%[email protected]:[email protected]

Watersheds with higher population densities or total population will be targeted and will include multi-year analysis of watersheds in SFB. The current monitoring site on Coyote Creek (COY060) will remain as a major SFB site, measuring runoff from a large watershed in Santa Clara County. COY060 is also a SPoT monitoring site (SWAMP, 2016) and is about two miles upstream of USGS gaging site (USGS, 2016b). DPR initiated water monitoring at this site in 2014 because it was a SPoT sampling. As in FY15/16, MCC040 and GRY030 will also be monitored, but results will be compared to two new sites that are further downstream in the watershed and may be more reasonable monitoring sites for future monitoring as they encompass larger urban population areas (Figures 2 3; Appendix 2). In Contra Costa County, Walnut Creek will be monitored at Concord Avenue, a current SPoT sampling site (SWAMP, 2016). In Alameda County, Arroyo de la Laguna will be monitored at Verona Road. Based on outcomes from the CDPRs Urban Strategy workgroup, additional sites may be added to increase spatial distribution in SFB.

Mitigation monitoring will continue in Folsom at the Marsh Hawk constructed water quality treatment pond (CWQTP) (Figure 4; Appendix 3). At this CWQTP, two stormdrain outfalls provide input from urban neighborhoods to supply the CWQTP. Efficacy of the CWQTP will be determined by mass balance at the inlets and outlet (water) and by comparisons between calculated sediment toxicity unit differences between the inlets and outlet (sediment).

4.2 Monitoring Candidates. SWPP uses the Surface Water Prioritization Model (SWPM) to assist in pesticide selection for ambient monitoring. SWMP is based on current use patterns and aquatic toxicity benchmark data; the output is presented as a relative prioritization (final) score (Budd et al., 2013; Luo et al., 2015). The final score is used as a guideline for monitoring. Actual pesticides selected may vary due to budget constraints, sampling logistics, and laboratory resource. However, SWPP has commonly used the final score of 9 or greater to select pesticides for ambient monitoring as pesticides with this ranking have higher use (use score > 3) and are potentially more toxic (tox score > 3) (Ensminger, 2015; Deng, 2016; DaSilva, 2016). The final score of 9 was used for the selecting pesticides in Roseville and at Arcade Creek, as shown below:

Criteria

Number of pesticides Roseville sites

Arcade Creek

1. Urban use Score > 2 (excluding Rights of Way)1 70 65 2. TRUE recommendation2 55 51 3. Final Score 9 (based on acute toxicity) 25 25 1Roseville is located in Placer County but pesticide use likely mimics use in Sacramento. Both counties are used for prioritization. For Arcade Creek, monitoring priority was limited to Sacramento County. 2 A TRUE recommendation removes pesticides that may have a high final score but are not likely to be detected based on physiochemical properties.

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Twenty-five pesticides met the criteria for the Roseville and Arcade Creek sites (Appendix 3). Other pesticides may also be monitored if the selected pesticides are present in the CDFAs analytical screens, especially when CDFAs new multi-residue analytical method becomes available (Sue Peoples, personal communication). Some pesticides may not have an associated CDFA analytical method available and therefore will not be monitored. Chlorfenapyr was selected by SWMP. In monitoring for this pesticide in 52 water samples since August 2014, it has never been detected (Appendix 4). To maximize resources, chlorfenapyr will not be monitored in Northern California monitoring in FY16/17 until CDFAs multi-residue analytical method becomes available (LC screen, fall 2016).

Monitoring in SFB will take place in three counties (Alameda, Contra Costa, and Santa Clara counties). These counties were used to set pesticide priorities with SWPM. Because of limited resources and sampling logistics, SFB will only be sampled twice a year (one dry, one rain event). Therefore SWMP was run by season, looking at pesticide use three months prior to expected sampling dates (October 2016 and June 2017).

The below listed criteria were used to select pesticides.

Criteria

Number of pesticides

Fall rain event

Spring dry event

1. Urban use Score > 2 (excluding Rights of Way) 77 72 2. TRUE recommendation 61 60 3. Final Score 9 (based on acute toxicity) 23 18

Fewer pesticides were selected for SFB than for the Sacramento Area (Appendix 5). Other pesticides may also be monitored if the selected pesticides are present in the CDFAs analytical methods, especially when CDFAs new multi-residue analytical method becomes available. Some selected pesticides may not have CDFA analytical methods available and therefore will not be monitored. Of pesticides recommended by SWMP, chlorfenapyr (explained previously), carbaryl, malathion, and DDVP will not be monitored in SFB. Carbaryl and malathion will not be monitored because, despite meeting the first criterion, their total use was the low. DDVP will not be monitored because its detection frequency is very low. DDVP has been monitored for 198 times in CDPRs urban monitoring program and has never been detected. In the Surface Water database, DDVP has been monitored for 6,424 times with only 9 detections (0.14% detection frequency). All 9 detections were alongside agricultural fields and most (8) were detected in small creeks likely containing agricultural runoff. In addition, it is known that DDVP has a very short half-life, ranging from less than 1 day to 4 days (NPIC, 1994; PPPD, 2016). Thus, it is highly unlikely that DDVP will be detected in larger urban creeks and rivers that will be monitored in SFB. It will not be monitored for in Northern California until the CDFAs multi-residue analytical method becomes available (GC screen, early 2017).

For mitigation monitoring, an additional criteria was added to select pesticides for monitoring. To ensure that differences between the inlets and outlet can be measured, only pesticides that have had a historical detection frequency of > 25% at the inlet mitigation sites (FOL2, FOL3)

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will be monitored. Bifenthrin, cyfluthrin, permethrin, fipronil, imidacloprid, 2,4-D, dicamba and triclopyr meet this criteria and will be targeted for monitoring. Evaluating these pesticides also gives a wide range of Log P values, which may influence the effectiveness of their removal in the CWQTP (Ensminger, 2015).

4.3 Water sampling. Roseville sites will be sampled four times during the year (two dry season events and two rainstorm events). Dry season events will take place in August 2016 and in June 2017 (Table 1). The rainstorm events will occur in September November (the first flush rainstorm of the 2016-2017 water year, if possible) and in the winter of 2017 (February March). Arcade Creek and SFB sites will be monitored for only one dry season sampling event (in June) and during one early season rain storm event due to resource constraints and logistics of sampling multiple sites during rain events (Tables 1, 2).

Folsom sites at the CWQTP will be sampled during two rainstorm events (Table 3). Flow-weighted samples will be taken during the entire storm event such that the total mass of pesticides into and out of the CWQTP can be measured. Rain storms will coincide with the rain event sampling in Roseville. Flow-weighted samples are not readily taken during dry events.

Most water samples will be collected as grab samples directly into 1-L amber bottles (Bennett, 1997). Where the stream is too shallow to collect water directly into these bottles, a secondary stainless steel container will be used to initially collect the water samples. At sites FOL2, FOL3, and FOL5 (mitigation sites), water samples will be collected as flow-weighted composite samples using automated sampling equipment (Sisnernoz et al., 2012). Samples will be stored and transported on wet ice or refrigerated at 4C until analyzed. At least 10% of the field samples will be field blanks or field duplicates.

4.4 Sediment sampling. Sediments will be collected two times a year at sampling sites in Roseville and Folsom (Table 4). Sediments will be collected using passive sampling techniques where practical, but substituting 1-quart Mason glass jars with 1-quart stainless steel AirScape (http://planetarydesign.com) containers (Budd et al., 2009). Otherwise, sediments will be collected with stainless steel scoops from the top bed layer (Mamola, 2005). Sediments will be sieved through a 2-mm sieve to remove gravel and plant material. Sediments will be analyzed for pyrethroids.

4.5 Toxicity. Water samples will be collected from a subset of the sampling sites and sent to the University of Davis, Aquatic Health Program, to be tested for toxicity to Hyalella azteca or other organisms such as Chironomus. The Roseville long-term monitoring sites will be the main focus for toxicity testing. One additional site in Folsom (FOL100) will be monitored to provide toxicity testing to support USGSs Reconnaissance study of surface waters in California (USGS, 2016a). USGS will analyze for 152 pesticides and degradates.

4.6 Field measurements. Water physiochemical properties (dissolved oxygen, electrical conductivity, pH, turbidity, and temperature) will be measured in situ during all grab sampling events with a calibrated YSI EXO 1 multiparameter water quality sonde (https://www.ysi.com/productsdetail.php?EXO1-Water-Quality-Sonde-89). Where feasible, flow rates will be estimated with a Global portable velocity flow probe (Goehring, 2008). At FOL2, FOL3, and FOL5 flow rates will be determined by using Hach Sigma 950 flow meters

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http://planetarydesign.com/https://www.ysi.com/productsdetail.php?EXO1-Water-Quality-Sonde-89

(Sisnernoz et al., 2012). A USGS gauging station records flow near the sampling sites on Arcade and Coyote Creeks (USGS, 2016b).

4.7 Sample Transport. CDPR staff will transport samples following the procedures outlined in CDPR SOP QAQC004.01 (Jones, 1999). A chain-of-custody record will be completed and accompany each sample.

4.8 Organic carbon and suspended sediment analysis. CDPR staff will analyze water and sediment samples for total organic carbon (TOC) and dissolved organic carbon (DOC) using a TOC-V CSH/CNS analyzer (Shimadzu Corporation, Kyoto, Japan) (Ensminger and Goh, 2011; Ensminger, 2013a). Water samples will also be analyzed for suspended sediment (Lisker and Goh, 2010; Ensminger, 2013b).

4.9 Modifications for FY16/17. The current sampling plan is an extension of urban monitoring in Northern California (for details of previous sampling protocols, see http://www.cdpr.ca.gov/docs/emon/pubs/protocol.htm for Studies 269 and 299). The sampling and analysis schedule is similar to that for FY 15/16. Main differences include changes in the sampling schedule in Folsom, change in sampling site at Arcade Creek, and changes in sampling sites and analytes monitored in SFB (Table 5).

5.0 CHEMICAL ANALYSIS CDFA will conduct the pesticide analysis for water samples. CDFA will analyze seven different analyte groups which will include 33 pesticides and degradates (Table 6). During FY 16/17, CDFA will have available a multi-residue analytical method that may include over 65 analytes; some monitoring will switch to this method as it becomes available (within the budget of this study; Tables 1, 2 and 3). The California Department of Fish and Wildlife (CDFW) will conduct pesticide analyses for eight pyrethroids in sediment (Table 7). All laboratory QA/QC will follow CDPR guidelines and will consist of laboratory blanks, matrix spikes, matrix spike duplicates, surrogate spikes, and blind spikes (Segawa, 1995). Laboratory blanks and matrix spikes will be included in each extraction set.

6.0 DATA ANALYSIS All data generated by this project will be entered to a Microsoft Office Access database that holds field information, field measurements, and laboratory analytical data. All ambient monitoring analytical data will also be uploaded into the CDPR Surface Water Database (SURF) (http://cdpr.ca.gov/docs/emon/surfwtr/surfdata.htm).

Initial analysis of urban monitoring data has shown that the data is heavily skewed and contains numerous non-detects often with different reporting limits (RL) which may violate the normality and equal variance assumptions of the parametric procedures (e.g., ANOVA and t-tests) (Ensminger et al., 2013). The non-normal structure posits a violation of the normality assumption of the commonly-used parametric procedures (tests based on the estimate of mean and standard deviation). Although some parametric procedures may be robust to the normality assumption, the use of these procedures on non-normal data will still lead to bias and low power. In addition, the substitution of non-detections can result in inaccuracy of estimate and test result (Helsel, 2012).

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http://www.cdpr.ca.gov/docs/emon/pubs/protocol.htmhttp://cdpr.ca.gov/docs/emon/surfwtr/surfdata.htmhttp:QAQC004.01

The presence of non-detections and multiple RLs limits the application of some widely-used parametric procedures, such as analysis of variance (ANOVA) and t-tests. While some other parametric procedures, such as the censored regression by using maximum likelihood estimate (MLE), are capable of handling censored data with multiple RLs, the validity of their results depends on the selection of correct distribution. In other words, the procedure is not distribution free and may lose power if the data does not follow a specific distribution.

In order to appropriately address the aforementioned characteristics of the sample data, a more generic and distribution-free approach, non-parametric statistics, will be used in this study. Helsel (2012) illustrated the application of non-parametric procedures to skewed and censored environmental data. The data will be analyzed by using R statistical program (http://www.r-project.org/), the Nondetects and Data Analysis for environmental data (NADA) package for R (http://cran.r-project.org/web/packages/NADA/NADA.pdf), and/or Minitab (http://www.minitab.com/en-us/).

Based on the study objectives, preliminary analysis, and data availability, we propose the following statistical procedures for data analysis (Table 8): 1) Explanatory data analysis will be performed to summarize the characteristics of the sample data. Urban monitoring data has been collected since 2008 for a variety of analytes (i.e., fipronil, 2,4-D, etc.; Table 6) at multiple locations (i.e., Folsom, Roseville, Sacramento, and San Francisco Bay; Appendixes 1 and 2) with different site types (i.e., stormdrain outfalls and receiving water), and between different seasons (i.e., dry and wet seasons). Plots, such as boxplots, histograms, probability plots, and empirical distribution functions, will be produced to explore any potential patterns implied by the data;

2) Hypothesis tests will be conducted to compare the concentration between groups of interest. For example, we will test whether or not there is significant difference in concentration between the dry and wet season, or between the different locations. Non-parametric procedures will be used to compute the statistics for hypothesis test. For data with multiple reporting limits, it will be censored at the highest limit before proceeding if the test procedure allows only one RL;

3) Trend analysis will be included to depict the change in concentration over time. We are specifically interested in determining the effectiveness of CDPR regulation 6970 which went into effect July 19, 2012 to mitigate pyrethroid contamination in urban waters. The ambient monitoring data from the Roseville sites and from FOL2 and FOL3 will be used. For the trend analysis, we will use Akritas-Thenil-Sen non-parametric regression which regresses the censored concentration on time, or the Kaplan-Meier method, which tests the effects of year, month and location by developing a mixed linear model between the censored concentration and the spatial-temporal factors.

4) Finally, we will attempt to develop statistical models to assess the factors potentially impacting pesticide concentration in surface water. One possible attempt is to develop a logistic regression model to estimate and predict the likelihood of detection or exceedance. The response variable will be the probability of the concentration being greater than or equal to the RLs or the toxicity benchmark. A series of explanatory variables will be examined, including: rainfall, field measurements (e.g., flow rate, pH, water TOC, sediment TOC, and TSS), number of households drains water into the storm drain outfall/creek, residential density (percent of impervious areas), season, year, regulation, and so on. Further literature review will be conducted to identify possible explanatory variables in favor of the model.

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http://www.r-project.org/http://www.r-project.org/http://cran.r-project.org/web/packages/NADA/NADA.pdfhttp://www.minitab.com/en-us/

7.0 TIMETABLE Field Sampling: August 2016 June 2017 Chemical Analysis: August 2016 December 2017 Summary Report: March 2018 SURF Data March 2018

8.0 LABORATORY BUDGET The cost for the CDFA chemical analyses of water samples for ambient monitoring is estimated below:

Monitoring Project Projected Cost

Ambient Monitoring

Sacramento area $100,980

San Francisco Bay Area $ 42,570

Ambient Monitoring Sub-total $143,550

Mitigation Monitoring (Folsom) $ 17,430

Grand Total $160,980

CDFAs new multi-residue analytical method should be available in FY16/17 and this will alter CDFAs cost per sample. However, the total budgeted amount for ambient monitoring will not exceed these limits for water sample analysis (Tables 1, 2, 3). For sediment analysis, CDFW chemical analysis is estimated at $10,111.50 (Table 4); this funded supplied through contract 15-C0104. All costs are estimated and include field QC sample analysis (field blanks and field duplicates) but not laboratory QC.

9.0 LITERATURE CITED Bennett, K. 1997. California Department of Pesticide Regulation SOP FSWA002.00: Conducting surface water

monitoring for pesticides. http://www.cdpr.ca.gov/docs/emon/pubs/sops/fswa002.pdf Budd, R., A. O'Geen, K. S. Goh, S. Bondarenko, J. Gan. 2009. Efficacy of constructed wetlands in pesticide

removal from tailwaters in the Central Valley, California. Environmental Science and Technology 43: 2925-2930

Budd, R., X. Deng, M. Ensminger, K. Starner, and Y. Luo. 2013. Method for Prioritizing Urban Pesticides for Monitoring Californias Urban Surface Waters http://cdpr.ca.gov/docs/emon/pubs/ehapreps/analysis_memos/budd_et_al_2013.pdf

Budd, R., M.P. Ensminger, D. Wang, K.S. Goh. 2015. Journal of Environmental Quality. DOI: 10.2134/jeq2015.01.0018

CDPR. 2013a. California Pesticide Information Portal (CALPIP) CDPR. 2013b. California Code of Regulations. Section 6970.

http://www.cdpr.ca.gov/docs/legbills/calcode/040501.htm#a6970 DaSilva, A.2016. Study 306. Surface water monitoring for pesticides in Agricultural areas of Northern California.

http://cdpr.ca.gov/docs/emon/pubs/protocol/study306_dasilva_2016.pdf Deng, X. 2016. Study 304. Surface water monitoring for pesticides in agricultural areas in central coast and

Southern California, 2016. http://cdpr.ca.gov/docs/emon/pubs/protocol/study304_deng_2016.pdf

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http://cdpr.ca.gov/docs/emon/pubs/ehapreps/analysis_memos/budd_et_al_2013.pdfhttp://www.cdpr.ca.gov/docs/legbills/calcode/040501.htm#a6970http://cdpr.ca.gov/docs/emon/pubs/protocol/study304_deng_2016.pdfhttp://cdpr.ca.gov/docs/emon/pubs/protocol/study306_dasilva_2016.pdfhttp://www.cdpr.ca.gov/docs/emon/pubs/sops/fswa002.pdfhttp:FSWA002.00http:10,111.50

Ensminger, M. and K.S. Goh. 2011. Total organic carbon analysis for sediment samples. Ensminger, M. 2013a. Analysis of whole sample suspended sediments in water

http://cdpr.ca.gov/docs/emon/pubs/sops/meth010.01.pdf. Ensminger, M. 2013b. Water TOC analysis using the Shimadzu TOC-VCSN and ASI-V autosampler.

http://cdpr.ca.gov/docs/emon/pubs/sops/meth01100.pdf Ensminger, M. P., R. Budd, K. C. Kelley, and K.S. Goh. 2013. Pesticide occurrence and aquatic benchmark

exceedances in urban surface waters and sediments in three urban areas of California, USA, 2008-2011. Ensminger, M. 2015. Ambient and mitigation monitoring in urban areas in Northern California.

http://cdpr.ca.gov/docs/emon/pubs/protocol/study299_ambient_mitigation_urban_areas.pdf Gan, J., S. Bondarenko, L. Oki, D. Haver, and J.X. Li. 2012. Occurrence of fipronil and its biologically active

derivatives in urban residential runoff. Environmental Science and Technology 46:1489-1495. Goehring, M. 2008. California Department of Pesticide Regulation SOP FSWA014.00: Instructions for the use of

the Global FP101 and FP201 flow probe for estimating velocity in wadable streams. http://www.cdpr.ca.gov/docs/emon/pubs/sops/fswa01401.pdf

Helsel, D. R. (2012). Statistics for censored environmental data using Minitab and R. 2nd

ed. Hoboken, NJ: John Wiley & Sons, Inc. Jones, D. 1999. California Department of Pesticide Regulation SOP QAQC004.01: Transporting, packaging, and

shipping samples from the field to the warehouse or laboratory. http://www.cdpr.ca.gov/docs/emon/pubs/sops/qaqc0401.pdf

Kelley, K. 2007. Pilot monitoring of pesticides residues in urban creeks of Sacramento County. http://cdpr.ca.gov/docs/emon/pubs/protocol/study247protocol.pdf

Lisker, E. and K.S. Goh. 2010. Total suspended solids analysis. https://www.youtube.com/watch?v=bs0I-jkZ658&index=4&list=PL6E5EB26821530A26

Mamola, M. 2005. California Department of Pesticide Regulation SOP FSWA016.00: Collecting sediment samples for pesticide analysis. http://www.cdpr.ca.gov/docs/emon/pubs/sops/fswa016.pdf

Luo, Y., M. Ensminger, R. Budd, X. Deng, and A. DaSilva. 2015. Methodology for prioritizing pesticides for surface water monitoring in agricultural and urban areas II: Refined priority list. http://cdpr.ca.gov/docs/emon/pubs/ehapreps/analysis_memos/prioritization_report_2.pdf or http://cdpr.ca.gov/docs/emon/surfwtr/sw_models.htm

Segawa, R. 1995. California Department of Pesticide Regulation SOP QAQC001.00: Chemistry laboratory quality control. http://www.cdpr.ca.gov/docs/emon/pubs/sops/qaqc001.pdf

Sisneroz, J., Q. Xiao, L.R. Oki, B.J. Pitton, D.L. Haver, T. J. Majcherek, R.L. Mazalewski, and M. Ensminger. 2012. Automated sampling of storm runoff from residential areas. http://cdpr.ca.gov/docs/emon/surfwtr/swposters/auto_sampling_residential_areas.pdf

State Water Resources Control Board. 2015. Impaired water bodies. http://www.waterboards.ca.gov/water_issues/programs/tmdl/integrated2012.shtml

SWAMP. 2016. SPoT: Stream Pollution Trends Monitoring Program. Trends in chemical contamination, toxicity and land use in Californial watersheds. http://www.waterboards.ca.gov/water_issues/programs/swamp/spot/

USGS. 2015. Water Resources of the United States. Hydrologic Units. http://water.usgs.gov/GIS/huc.html USGS. 2016a. Reconnaissance study of surface waters in California.

http://ca.water.usgs.gov/projects/PFRG/CurrentProjects.html#2014-20 USGS. 2016b. National Water Information System: Web interface, current conditions for California: streamflow.

http://waterdata.usgs.gov/ca/nwis/current/?type=flow Weston, D.P. and M.J. Lydy. 2014. Toxicity of the insecticide fipronil and its degradates to benthic

macroinvertebrates of urban streams. Environmental Science and Technology 48:1290-1297.

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http://cdpr.ca.gov/docs/emon/pubs/sops/meth01100.pdfhttp://cdpr.ca.gov/docs/emon/pubs/protocol/study299_ambient_mitigation_urban_areas.pdfhttp://www.cdpr.ca.gov/docs/emon/pubs/sops/qaqc0401.pdfhttps://www.youtube.com/watch?v=bs0I-jkZ658&index=4&list=PL6E5EB26821530A26https://www.youtube.com/watch?v=bs0I-jkZ658&index=4&list=PL6E5EB26821530A26http://www.cdpr.ca.gov/docs/emon/pubs/sops/fswa016.pdfhttp://cdpr.ca.gov/docs/emon/pubs/ehapreps/analysis_memos/prioritization_report_2.pdfhttp://cdpr.ca.gov/docs/emon/surfwtr/sw_models.htmhttp://www.cdpr.ca.gov/docs/emon/pubs/sops/qaqc001.pdfhttp://cdpr.ca.gov/docs/emon/surfwtr/swposters/auto_sampling_residential_areas.pdfhttp://www.waterboards.ca.gov/water_issues/programs/tmdl/integrated2012.shtmlhttp://www.waterboards.ca.gov/water_issues/programs/swamp/spot/http://waterdata.usgs.gov/ca/nwis/current/?type=flowhttp://ca.water.usgs.gov/projects/PFRG/CurrentProjects.html#2014-20http://water.usgs.gov/GIS/huc.htmlhttp:QAQC001.00http:FSWA016.00http://cdpr.ca.gov/docs/emon/pubs/protocol/study247protocol.pdfhttp:QAQC004.01http://www.cdpr.ca.gov/docs/emon/pubs/sops/fswa01401.pdfhttp:FSWA014.00http://cdpr.ca.gov/docs/emon/pubs/sops/meth010.01.pdf

Table 1. Ambient monitoring schedule and analytical cost estimates for water samples collected in Sacramento area, FY 16/17 and analyzed by CDFA

Site* Analyte Group**

Dry Season Monitoring

Rainstorm Monitoring

QC Field samples

Total Number Samples

Cost/ Sample Total Cost

Ag 16 Ju 17 S-D 16 W 17

-------- Number of Samples ---------

ARC_DP PGC010 PGC021 PGC022 PGC040 PGC058

CY 4 5 6 5 2 22 $480 $10,560 DN short 4 5 6 5 2 22 $840 $18,480 FP/OP 4 5 6 5 2 22 $840 $18,480 IMD 4 5 6 5 2 22 $600 $13,200 PI short 4 5 6 5 2 22 $540 $11,880 PY-6 4 5 6 5 2 22 $600 $13,200

SA 4 5 6 5 2 22 $690 $15,180

Total 140 14 154 $100,980 *PGC058 will only be sampled in two rain events and Arcade Creek will only be sampled in one dry and one rain event. **CY = carbaryl; FP = fipronil + degradates; OP = organophosphates (chlorpyrifos, diazinon, and malathion); IMD = imidacloprid; DN = dinitroaniline herbicides + oxyfluorfen (short screen); PI = photosynthetic inhibitor herbicides (short screen); PY-6 = pyrethroid (six analyte screen); SA = synthetic auxin herbicides Ag 16, August 2016; Ju 17, June 2017; S-D 16, September - December 2016; W 17, Winter 2017.

Table 2. Ambient monitoring schedule and analytical cost estimates for water samples collected in the San Francisco Bay Area, California, FY 2016-2017 and analyzed by CDFA

Site Analyte Group*

Rainstorm Monitoring**

Dry Season Monitoring QC Field

samples Total Number Samples

Cost/ Sample Cost -------- Number of Samples --------

COY060 GYR030 MCC040 Walnut Creek Arroyo de la Laguna

DN Short 5 5 1 11 $840 $9,240

FP 5 5 1 11 $600 $6,600

IMD 5 5 1 11 $600 $6,600

PI short 5 5 1 11 $540 $5,940

PY-6 5 5 1 11 $600 $6,600

SA 5 5 1 11 $690 $7,590 Totals 60 6 66 $42,570

*DN = dinitroaniline herbicides + oxyfluorfen (short screen); FP = fipronil + degradates; IMD = imidacloprid; PI = photosynthetic inhibitor herbicides (short screen); PY-6 = pyrethroid (six analyte screen); SA = synthetic auxin herbicides.

** First flush rain event in fall 2016 is targeted. Dry sampling will be in June 2017

10

Table 3. Monitoring schedule and analytical cost estimates for mitigation monitoring water samples collected in Folsom, California, FY 16/17 and analyzed by CDFA

Site Analyte Group*

Rainstorm Monitoring QC

Samples

Total Number Samples

Cost/ Sample

Total Cost S-D

16 W 17

---------- Number of Samples -----------

FOL2 FOL3 FOL5

FP 3 3 1 7 $600 $4200 IMD 3 3 1 7 $600 $4200 PY-6 3 3 1 7 $600 $4200 SA 3 3 1 7 $690 $4830

Totals 24 4 28 $17,430 S-D 16, September - December 2016; W 17 = winter 2017; monitoring will only occur in rainy season to allow for flow weighted sample collection. *FP = fipronil + degradates; IMD = imidacloprid; PY-6 = pyrethroid (six analyte screen); SA = synthetic auxin herbicides

Table 4. Monitoring schedule and analytical cost estimates for sediment samples collected during FY 2016-2017, and analyzed by CDFW for pyrethroids

Expected Sampling Period Sites

No. of Samples

Cost per Sample* Cost Grand Total

Fall 2016 PCC010, PGC019**, PGC040, FOL2, FOL3, FOL5 6 $722.25 $4,333.50

$10,111.50

Spring 2016 PCC010, PGC019, PGC040, FOL2, FOL3, FOL5 6 $722.25 $4,333.50

Field duplicates Selected sites 2 $722.25 $1,444.50

*$535 per sample + 35% overhead **A combination of PGC021 and PGC022

11

Table 5. Listed below are modifications from FY 15/16 Study 299 protocol (http://www.cdpr.ca.gov/docs/emon/pubs/protocol/study299_ambient_mitigation_urban_areas.pdf)

Change from FY 15/16 Justification

Discontinue sampling at (analytical chemistry)

FOL100 FOL100 was sampled to support bioassessment contract 13-C0029 (http://cdpr.ca.gov/docs/emon/surfwtr/contracts.htm) which ended in June 2016. FOL will be monitored for toxicity to support USGSs pesticide study (USGS, 2016a)

Monitor Marsh Hawk (Folsom) CWQTP (FOL2, FOL3, FOL5) only during two rain events

The purpose of these sites is to investigate the effectiveness of the CWQTP by observing differences in mass loading of pesticides between the inlets and outlet. Flow-weighted samples have been shown to best sampled during rain events. Sufficient grab sample data already exists for dry season monitoring; currently there are 937 data points from 50 different dry season sampling events (2009-2015)

Terminate sediment sampling at Folsom sites TRP1 and TPR2 (a second CWQTP in Folsom)

Lack of funding; contract 10-C0116 ended, which supported this work

Move Arcade Creek site 2 upstream

miles New site is not influenced by backup by Natomas Drain, has safer access, and is closer to USGS gage station 11447360

Drop chlorfenapyr dropped from sampling (until CDFA multi-reside analytical method becomes available)

Dropped due to resource constraints and due to lack of detections in previous monitoring. In monitoring for this pesticide in 52 water samples since August 2014, it has never been detected

In the San Francisco Bay area, add sampling sites on Walnut Creek (Contra Costa County) and on Arroyo de la Laguna (Alameda County); drop site on Guadalupe River

Increase spatial distribution in San Francisco Bay area; site on Guadalupe River suspended due to budget and proximity to sampling site on Coyote Creek

Number of analytes monitored from San Francisco Bay area sites increased

More fully characterize pesticide contamination in Bay area.

Add PGC058 to Roseville during rain event

sampling Determine inputs from Kaseberg Creek and South Branch of Pleasant Grove Creek during rain events.

Measure dissolved organic carbon in water samples

Factor to samples.

estimate pyrethroid bioavailability in water

12

http://www.cdpr.ca.gov/docs/emon/pubs/protocol/study299_ambient_mitigation_urban_areas.pdf

Table 6. Chemical analysis of pesticides in the Northern California urban monitoring Study 299. The California Department of Food and Agriculture (CDFA) will analyze all water samples. Specific methods can be found at http://www.cdpr.ca.gov/docs/emon/pubs/em_methd_main.htm.

Pesticide Analyte Screen (Method ID) Method Detection

Limit (g L-1) Reporting Limit

(g L-1)

Carbaryl Carbaryl (CY) (EMON-SM11.3) 0.0111 0.05

Fipronil

Fipronil (FP) + Organophosphate (OP) (EMON-SM-05-013)

0.004 0.05 Fipronil sulfide 0.003 0.05 Fipronil sulfone 0.005 0.05 Fipronil desulfinyl 0.003 0.05 Fipronil desulfinyl amide 0.005 0.05 Fipronil amide 0.005 0.05 Diazinon 0.0012 0.01 Chlorpyrifos 0.0079 0.01 Malathion 0.0117 0.04 Imidacloprid Imidacloprid (IMD) 0.0101 0.05 Bifenthrin Pyrethroid (PY-6)

(EMON-SM-05-022) 0.00176 0.005

Cyfluthrin 0.00173 0.015 Cypermethrin 0.00175 0.015 Deltamethrin/Tralomethrin 0.00177 0.005 Lambda-cyhalothrin 0.00115 0.015 Permethrin cis 0.00352 0.015 Permethrin trans 0.00768 0.015 Benfluralin Dinitroaniline (DN)

(EMON-SM-05-006) 0.012 0.05

Ethalfluralin 0.015 0.05 Oryzalin 0.021 0.05 Oxyfluorfen 0.0101 0.05 Pendimethalin 0.012 0.05 Prodiamine 0.0124 0.05 Trifluralin 0.0144 0.05 Bromacil Photosynthetic Inhibitor

Herbicides (PI) (EMON-SM-62.9)

0.031 0.05 Diuron 0.022 0.05 Prometon 0.016 0.05 Simazine 0.013 0.05 Tebuthiuron 0.014 0.05 2,4-D

Synthetic Auxin Herbicides (SA)

EMON-SM-05-012)

0.015 0.05 Dicamba 0.017 0.05 MCPA 0.022 0.05 Triclopyr 0.020 0.05

13

http://www.cdpr.ca.gov/docs/emon/pubs/em_methd_main.htm

Table 7. Chemical analysis of pyrethroids in the Northern California urban monitoring Study 299. The Department of Fish and Wildlife (DFW) will analyze sediment samples.

Pesticide Method Detection Limit (ng g-1 dry wt) Reporting Limit (ng

g-1 dry wt)

Bifenthrin 0.063 0.25 Cyfluthrin 0.129 1.25 Cypermethrin 0.131 1.25 Deltamethrin/Tralomethrin 0.222 1.0 Esfenvalerate/Fenvalerate 0.131 0.5 Fenpropathrin 0.044 0.25 Lambda cyhalothrin 0.053 0.5 Permethrin, cis 0.484 1.25 Permethrin, trans 0.8 2.5

The procedures for pyrethroid extraction and analysis in sediment can be found at http://www.cdpr.ca.gov/docs/emon/pubs/anl_methds/wpcl_pr_008.pdf and http://www.cdpr.ca.gov/docs/emon/pubs/anl_methds/wpcl_ms_67.pdf, respectively

Table 8. Non-parametric procedures frequently used for comparing paired data, two samples and three or more samples.

Data Non-Parametric Procedure

Paired data Wilcoxon signed-rank test for uncensored data Sign test (modified for ties) for censored data with one RL Score tests for censored data with multiple RLs (the PPW test and the Akritas test)

Two samples

Wilcoxon rank-sum (or Mann-Whitney) test or Kolmogorov-Smirnov test for censored data with one RL Score tests for censored data with multiple RLs (the Gehan test and generalized Wilcoxon test)

Three or more samples in one-way layout

Kruskal-Wallis test (for unordered alternative) or Jonckheere-Terpstra test (for ordered alternative) for censored data with one RL Generalized Wilcoxon score test for censored data with multiple RLs Multiple comparison to detect which group is different

Three or more samples in two-way layout

Friedmans test (for unordered alternative) or Pages test (for ordered alternative) for censored data with one RL Multiple comparison to detect which group is different

14

http://www.cdpr.ca.gov/docs/emon/pubs/anl_methds/wpcl_pr_008.pdfhttp://www.cdpr.ca.gov/docs/emon/pubs/anl_methds/wpcl_ms_67.pdf

Figure 1. FY16/17 monitoring site on Arcade Creek (ARC_DP) in relation to original Arcade Creek watershed monitoring site (ARC_Nor). The USGS gaging station11447360 is upstream of ARC_DP monitoring site.

15

Figure 2. Location of MCC040 compared to new monitoring site AL_VER in the Tri-Valley area of the San Francisco Bay area (AL_VER, Arroyo de la Laguna at Verona Road). AL_VER encompasses runoff from several urban HUC12 watersheds; MCC040 encompasses urban runoff from part of one watershed (USGS, 2015). USGS gaging station11176900 is present at AL_VER.

16

Figure 3. Location of GRY030 compared to monitoring site WAL_CA in east Contra Costa of the San Francisco Bay area (WAL_CA, Walnut Creek at Concord Avenue). WAL_CA encompasses urban runoff from four watersheds except for the Grayson Creek subwatershed of the Walnut Creek watershed. GRY030 encompasses urban runoff only from the Grayson Creek subwatershed (USGS, 2015). WAL_CA is a SPoT sampling site (SWAMP, 2016).

17

Figure 4. Constructed water quality treatment pond (CWQTP) in Folsom, California. The CWQTP is outlined in yellow with arrows indicating water flow direction (inputs at FOL2 and FOL3; outfall at FOL5). Flow gaging equipment has been installed at the CWQTP on Marsh Hawk Drive with contract 13-C0052 (http://cdpr.ca.gov/docs/emon/surfwtr/contracts.htm).

18

http://cdpr.ca.gov/docs/emon/surfwtr/contracts.htm

Appendix 1. Sampling site details for Study 299, Sacramento area

Site Type/Description No. Homes Area (Acres)

GPS Coordinates (NAD83) Latitude Longitude

Ambient Monitoring: Roseville, California (sediment and water sampling)

PGC010 Stormdrain outfall at Diamond Woods Circle, Roseville 250 56 38.80477 -121.32733

PGC021 Single storm drain outfall at Opal and Northpark Drive, Roseville 130 44 38.80267 -121.338551

PGC022 Dual stormdrain outfall at Opal and Northpark Drive, Roseville 375 112 38.802599 -121.338787

PGC040 Pleasant Grove Creek at Veterans Park (receiving water) 38.79857 -121.34802

PGC058 Pleasant Grove Creek at Hayden Pkwy and Blue Oaks Blvd (receiving water)** 38.79477 -121.37251

Ambient Monitoring: Sacramento, California (water sampling only)

ARC Creek Arcade Creek at Del Paso (receiving water) 38.628216 -121.420606

Mitigation Monitoring: Folsom, California

CWQTP* at Marsh Hawk Drive (sediment and water sampling)

FOL2 Stormdrain outfall; input at Brock Circle 252 65 38.6503 -121.14494

FOL3 Stormdrain outfall; input at Hawk Dr. Marsh 91 27 38.64938 -121.14494

FOL5 CWQTP* outfall near Marsh 0.7 acres) Hawk Dr. (CWQTP area: 38.64969 -121.14459

Approximate number of homes and area (Goggle Earth Pro, Mountain View, CA) *Constructed water quality treatment pond as defined by the city of Folsom, CA **SPoT sampling site (SWAMP, 2016)

Appendix 2. Sampling site details for Study 299, San Francisco Bay area

Site Code Site Location County Watershed* GPS Coordinates (NAD83) Latitude Longitude

COY060 Coyote Creek near Montague Expressway* Santa Clara Metcalfe-

Coyote Creek 37.3954 -121.91485

GRY030 Grayson Creek at Center Avenue Contra Costa Walnut Creek- 37.983549 -122.068498

WAL_CA Walnut Creek near Concord Avenue* Contra Costa Frontal Suisan Bay Estuaries 37.980630 -122.0516

MCC040 Big Canyon/Martin Canyon Creek near Dublin Boulevard and I-680 Alameda South San Ramon Creek 37.706412 -121.926687

AL_VER Arroyo de la Laguna Rd Creek at Verona Alameda Arroyo de la Laguna 37.62672 -121.88258

*USGS HUC12 watershed (USGS, 2015) ** SPoT sampling site (SWAMP, 2016)

19

monitored

Appendix 3. Priority pesticides for Placer and Sacramento Counties. Listed, pesticides with priorities greater or equal to the priority score of 9, with a TRUE monitoring recommendation from SWPM (based on acute toxicity). Priority model does not include homeowner pesticide use.

Pesticides with available analytical methods (CDFA)

Pesticide CDFA Screen*

Use (lb ai)

Use Score

Benchmark (g/L)

Tox Score

Final Score

Permethrin PY 15456 5 0.0106 6 30 Bifenthrin PY 19761 5 0.075 6 30 Fipronil FP 9027 5 0.11 5 25 Cyfluthrin PY 6861 4 0.0125 6 24 Lambda-cyhalothrin PY 555 3 0.0035 7 21 Cypermethrin PY 1623 4 0.195 5 20 Deltamethrin PY 492 3 0.055 6 18 Pendimethalin DN 3978 4 5.2 4 16 Chlorfenapyr** CF 1683 4 2.915 4 16 Carbaryl CY 1534 3 0.85 5 15 Imidacloprid IMD 2486 4 34.5 3 12 Oryzalin DN 1693 4 15.4 3 12 Diuron PI 1097 3 2.4 4 12 Prodiamine DN 1565 3 6.5 4 12 Esfenvalerate PY 88 2 0.025 6 12 Malathion OP 170 2 0.295 5 10 Oxyfluorfen DN 114 2 0.29 5 10 Tebuthiuron PI 455 3 50 3 9 2,4-D SA 1401 3 13.1 3 9 Triclopyr SA 1099 3 70 3 9 Pesticides with no analytical methods for surface water (CDFA) - these pesticides will not be

Dithiopyr N/A 2861 4 20 3 12 Dichlobenil*** N/A 8156 4 30 3 12 Isoxaben N/A 644 3 10 4 12 Sulfometuron-methyl N/A 111 2 0.45 5 10 Propiconazole N/A 586 3 21 3 9 *CY, carbaryl; CF, chlorfenapyr; DN, dinitroaniline herbicides+oxyfluorfen; FP, fipronil + degradates; IMD, imidacloprid; OP, organophosphates; PI, photosynthetic inhibitor herbicides; PY, pyrethroid; SA, synthetic auxin herbicides **Will not be monitored in FY16/17. See text. ***Applied in Sacramento County only, by one applicator: Root Tamers. Root Tamers injects dichlobenil into sewers to prevent root clogging and growth.

20

Appendix 4. Chlorfenapyr results in CDPRs urban monitoring program. Monitoring began in August 2014

Region* Area* Event Type Sample Date Site** Site Type Result (ug/L)*** Reporting limit (g/L)

NorCal SAC Nonstorm 8/6/2014 31_29 Stormdrain nd 0.1 NorCal SAC Nonstorm 8/6/2014 31_30 Stormdrain nd 0.1 NorCal SAC Nonstorm 8/6/2014 31_31 Stormdrain nd 0.1

NorCal SAC Nonstorm 8/6/2014 31_26 Receiving Water nd 0.1

NorCal SAC Nonstorm 8 /6 /2014 31_26 Receiving Water nd 0.1

NorCal SAC Storm 10/31/2014 31_29 Stormdrain nd 0.1 NorCal SAC Storm 10/31/2014 31_30 Stormdrain nd 0.1 NorCal SAC Storm 10/31/2014 31_31 Stormdrain nd 0.1

NorCal SAC Storm 10/31/2014 31_26 Receiving Water nd 0.1



NorCal SAC Nonstorm 6/8/2015 31_29 Stormdrain nd 0.1 NorCal SAC Nonstorm 6/8/2015 31_29 Stormdrain nd 0.1 NorCal SAC Nonstorm 6/8/2015 31_30 Stormdrain nd 0.1 NorCal SAC Nonstorm 6/8/2015 31_31 Stormdrain nd 0.1



NorCal SAC Nonstorm 8/3/2015 31_29 Stormdrain nd 0.1 NorCal SAC Nonstorm 8/3/2015 31_29 Stormdrain nd 0.1 NorCal SAC Nonstorm 8/3/2015 31_30 Stormdrain nd 0.1 NorCal SAC Nonstorm 8/3/2015 31_31 Stormdrain nd 0.1 NorCal SAC Storm 11/1/2015 31_30 Stormdrain nd 0.1 NorCal SAC Storm 11/1/2015 31_31 Stormdrain nd 0.1



NorCal SAC Storm 11/2/2015 31_29 Stormdrain nd 0.1




SoCal LA Nonstorm 8/28/2014 19_157 Receiving Water nd 0.1

SoCal LA Storm 11/1/2014 19_157 Receiving Water nd 0.1


21

Region* Area* Event Type Sample Date Site** Site Type Result (ug/L)*** Reporting limit (g/L)





SoCal OC Nonstorm 8/27/2014 30_24 Stormdrain nd 0.1

SoCal OC Nonstorm 8/27/2014 30_26 Receiving Water nd 0.1

SoCal OC Storm 11/1/2014 30_24 Stormdrain nd 0.1

SoCal OC Storm 11/1/2014 30_26 Receiving Water nd 0.1









*NorCal, Northern California; SoCal, southern California; SAC, Sacramento area; OC, Orange County; LA, Los Angeles County

**Site codes, see http://cdpr.ca.gov/docs/emon/surfwtr/surfcont.htm

***nd=not detected

22

http://cdpr.ca.gov/docs/emon/surfwtr/surfcont.htm

Appendix 5. Priority pesticides for San Francisco Bay area sampling sites. Listed, pesticides with priorities greater or equal to the priority score of 9, with a TRUE monitoring recommendation from SWPM. Priority model does not include homeowner pesticide use.

Pesticides with available analytical methods (CDFA)

Pesticide CDFA Screen*

Use Score (Spring/Fall)

Benchmark (g/L)

Tox Score (Spring/Fall)

Final Score (Spring/Fall)

Permethrin PY 5/5 0.0106 6/6 30/30 Bifenthrin PY 4/4 0.075 6/6 24/24 Fipronil FP 4/4 0.11 5/5 20/20 Cyfluthrin PY 3/4 0.0125 6/6 18/24 Lambda-cyhalothrin PY 3/3 0.0035 7/7 21/21 Deltamethrin PY 3/4 0.055 6/6 18/24 Diuron PI 4/5 2.4 4/4 16/20 Cypermethrin PY 3/4 0.195 5/5 15/20 Pendimethalin DN 4/3 5.2 4/4 16/12 Chlorfenapyr** CF 3/3 2.915 4/4 12/12 Imidacloprid IMD 4/4 34.5 3/3 12/12 Prodiamine DN 3/3 6.5 4/4 12/12 Triclopyr SA 4/4 70 3/EX 12/12 Bromacil PI EX/5 6.8 EX/4 EX/20 Sulfometuron-methyl** None EX/3 0.45 EX/5 EX/15 2,4-D SA 4/3 13.1 3/3 12/9 DDVP** OP EX/2 0.035 EX/6 EX/12 Malathion** OP 2/2 0.295 5/5 10/10 Carbaryl** CB 2/2 0.85 5/5 10/10 Esfenvalerate PY EX/2 0.025 EX/6 EX/12 Oryzalin DN 3/3 15.4 3/3 9/9 Dithiopyr** None 3/EX 20 3/EX 9/EX Propiconazole None EX/3 21 EX/3 EX/9 Indoxacarb** None EX/3 84 EX/3 EX/9 *CY, carbaryl; CF, chlorfenapyr; DN, dinitroaniline herbicides+oxyfluorfen; FP, fipronil + degradates; IMD, imidacloprid; OP, organophosphates; PI, photosynthetic inhibitor herbicides; PY, pyrethroid; SA, synthetic auxin herbicides **Will not be monitored, see text. CDFA does not currently have an analytical method for sulfometuron-methyl, dithiopyr, propiconazole, or Indoxacarb in surface water ***EX=not in top final score Of 9

23

Appendix II. Sampling Site Information, Study 299 FY2016-17 Site ID County Watershed Latitude Longitude Site Type Site Location

ARC_Del_Paso Sacramento Arcade Creek 38.62822 -121.4206 Receiving Water At Del Paso Blvd near Arcade Blvd FOL002 Sacramento Upper American River 38.6503 -121.1449 Stormdrain Storm Drain outfall at Brock Circle, feeds into wetland FOL003 Sacramento Upper American River 38.64938 -121.1449 Stormdrain Storm drain outfall at the south (bottom) end of the greenway on Marsh Hawk Dr. between Sprig Circle and McAdoo Dr PGC010 Placer Pleasant Grove Creek 38.80477 -121.3273 Stormdrain Storm drain at Dr. Paul J. Dugan Park, 1432 Diamond Woods Circle PGC019 Placer Pleasant Grove Creek 38.80248 -121.3386 Stormdrain Conflucence of two Storm Drain outlfows at Opal and Parkside Way, lefthand side of stream PGC021 Placer Pleasant Grove Creek 38.80267 -121.3386 Stormdrain Single Storm Drain at Opal and Parkside Way PGC022 Placer Pleasant Grove Creek 38.80261 -121.3388 Stormdrain Dual Storm Drain at Opal and Parkside Way PGC040 Placer Pleasant Grove Creek 38.79857 -121.348 Receiving Water Pleasant Grove Creek Receiving Water at Veteran's Memorial Park PGC058 Placer Pleasant Grove Creek 38.79477 -121.3725 Receiving Water Pleasant Grove Creek downstream receiving site AL_VER Alameda Arroyo de la Laguna 37.62672 -121.8826 Receiving Water Verona Road off of Pleasanton Sunol Road COY060 Santa Clara Coyote River 37.39587 -121.9149 Receiving Water Coyote Creek at Montague Expressway GRY030 Contra Costa Walnut Creek 37.98355 -122.0685 Receiving Water Grayson Creek at Center Ave. MCC040 Alameda South San Ramon Creek 37.70641 -121.9267 Receiving Water Martin Canyon/Koopman Canyon receiving water at Dublin Blvd by Safeway and I-680 Wal_CA Contra Costa Walnut Creek 37.98063 -122.0516 Receiving water Walnut Creek at Concord Avenue

Arcade Creek at Del Paso Blvd sampling site

PGC022

PGC022

PGC010 PGC021

PGC040

PGC022

PGC058

Sampling sites PGC010, PGC021, PGC022, PGC040, and PGC058

FOL002

FOL003

Sampling sites FOL002 and FOL003

MCC040

GRY030

AL_VER WAL_CA

COY060

Sampling sites in the San Francisco Bay Area

Appendix III. Water quality data for Study 299, FY2016-17

Site ID Site Type Sample Date Event Type* Water Flow

Temp (oC) pH

DO (mg/L)*

Cond (mS/cm)

Salinity (ppt)

TSS (mg/L)*

Water DOC

(ppm)*

Water TOC

(ppm)* PGC010 Stormdrain 8/1/2016 Nonstorm Flowing 23.388 6.98 1.54 0.187 0.09 6.25 6.83 6.94 PGC021 Stormdrain 8/1/2016 Nonstorm Ponded 21.28 6.65 1.01 0.234 0.11 15.79 9.47 9.81 PGC022 Stormdrain 8/1/2016 Nonstorm Flowing 20.909 7.41 7.45 0.153 0.07 3.40 9.25 9.07 PGC040 Receiving Water 8/1/2016 Nonstorm Ponded 21.5 7.32 2.41 0.498 0.24 21.33 13.08 12.85 AL_VER Receiving Water 10/14/2016 Nonstorm Flowing 17.483 7.97 MV MV 0.7 14.80 4.30 4.19 ARC_Del_Paso Receiving Water 10/14/2016 Storm Flowing 19.59 7.01 8.6 0.086 0.04 43.70 22.76 21.80 COY060 Receiving Water 10/14/2016 Nonstorm Flowing 16.243 8.03 MV MV 0.73 18.50 2.37 2.17 GRY030 Receiving Water 10/14/2016 Storm Flowing 18.787 7.53 8.57 MV 0.5 41.90 16.73 15.63 MCC040 Receiving Water 10/14/2016 Storm Flowing 20.921 7.5 MV MV 0.49 282.70 78.47 78.37 PGC010 Stormdrain 10/14/2016 Storm Flowing 19.072 7.46 8.67 0.117 0.05 21.00 7.94 7.30 PGC021 Stormdrain 10/14/2016 Storm Flowing 19.271 7.22 9.22 0.084 0.04 18.90 12.55 11.86 PGC022 Stormdrain 10/14/2016 Storm Flowing 19.479 7.42 8.63 0.126 0.06 17.10 14.18 13.19 PGC040 Receiving Water 10/14/2016 Storm Flowing 17.942 6.82 3.84 0.212 0.1 21.40 20.10 18.67 PGC058 Receiving Water 10/14/2016 Storm Flowing 19.05 7.15 7.53 0.147 0.07 8.20 11.09 11.13 Wal_CA Receiving water 10/14/2016 Storm Flowing 19.861 7.84 MV MV 0.23 704.40 34.48 32.67 FOL003 Stormdrain 10/17/2016 Storm Flowing MV MV MV MV MV 7.10 6.48 6.72 PGC021 Stormdrain 3/20/2017 Storm Flowing 14.723 5.89 MV 0.042 0.02 15.50 3.99 4.04 PGC010 Stormdrain 3/21/2017 Storm Flowing 14.652 7.01 MV 0.049 0.02 6.20 2.44 2.58 PGC022 Stormdrain 3/21/2017 Storm Flowing 14.866 6.56 MV 0.055 0.02 12.10 2.96 3.12 PGC040 Receiving Water 3/21/2017 Storm Flowing 15.48 7.29 MV 0.237 0.11 21.50 4.28 4.37 PGC058 Receiving Water 3/21/2017 Storm Flowing 15.447 7.51 MV 0.351 0.17 34.10 5.42 5.47 FOL002 Stormdrain 4/10/2017 Storm Flowing MV MV MV MV MV 4.80 3.77 4.20 FOL003 Stormdrain 4/10/2017 Storm Flowing MV MV MV MV MV 2.20 2.15 2.44 ARC_Del_Paso Receiving Water 6/5/2017 Nonstorm Ponded 22.24 7.7 6.06 0.321 0.15 5.60 12.47 13.31 PGC010 Stormdrain 6/5/2017 Nonstorm Flowing 20.353 6.9 1.88 0.201 0.09 2.00 8.40 8.42 PGC021 Stormdrain 6/5/2017 Nonstorm Flowing 20.9 7.17 6.26 0.119 0.06 138.00 6.91 7.68 PGC022 Stormdrain 6/5/2017 Nonstorm Flowing 18.973 7.4 8.82 0.12 0.06 6.50 6.35 6.59 PGC040 Receiving Water 6/5/2017 Nonstorm Flowing 21.866 7.97 8.09 0.522 0.25 0.40 6.27 6.40 PGC058 Receiving Water 6/5/2017 Nonstorm Flowing 22.823 7.94 7.84 0.535 0.26 0.40 6.27 6.42 AL_VER Receiving Water 6/6/2017 Nonstorm Flowing 23.002 8.15 9.42 1.389 0.7 8.10 4.05 4.03

Appendix III. Water quality data for Study 299, FY2016-17

Site ID Site Type Sample Date Event Type* Water Flow

Temp (oC) pH

DO (mg/L)*

Cond (mS/cm)

Salinity (ppt)

TSS (mg/L)*

Water DOC

(ppm)*

Water TOC

(ppm)* COY060 Receiving Water 6/6/2017 Nonstorm Flowing 20.379 8.13 7.89 1.112 0.55 16.90 2.87 2.99 GRY030 Receiving Water 6/6/2017 Nonstorm Flowing 19.275 7.9 5.79 1.64 0.83 3.80 4.50 4.54 MCC040 Receiving Water 6/6/2017 Nonstorm Flowing 16.68 7.89 7.72 1.596 0.81 4.80 3.14 3.08 Wal_CA Receiving water 6/6/2017 Nonstorm Flowing 18.656 8.05 7.63 1.121 0.56 1.90 3.04 3.14 *Nonstorm, dry season monitoring; Storm, rain storm monitoring; MV, missing value Flow weighted samples collected across entire storm, no single value available. Water qaulity data for entire storm available on request

Appendix IV. Water monitoring data for Study 299, FY2016-17

Site ID Site Type Sample Date Event Type* Analyte Name Result (ug/L)*

RL (ug/L)

MDL (ug/L)

PGC010 Stormdrain 01-Aug-16 Nonstorm 2,4-D 0.808 0.05 0.015 PGC021 Stormdrain 01-Aug-16 Nonstorm 2,4-D 1.76 0.05 0.015 PGC022 Stormdrain 01-Aug-16 Nonstorm 2,4-D 2.98 0.05 0.015 PGC040 Receiving Water 01-Aug-16 Nonstorm 2,4-D 0.07 0.05 0.015 AL_VER Receiving Water 14-Oct-16 Nonstorm 2,4-D trace 0.05 0.015 ARC_Del_Paso Receiving Water 14-Oct-16 Storm 2,4-D 0.098 0.05 0.015 COY060 Receiving Water 14-Oct-16 Nonstorm 2,4-D nd 0.05 0.015 GRY030 Receiving Water 14-Oct-16 Storm 2,4-D 0.319 0.05 0.015 MCC040 Receiving Water 14-Oct-16 Storm 2,4-D 1.87 0.05 0.015 PGC010 Stormdrain 14-Oct-16 Storm 2,4-D 0.568 0.05 0.015 PGC021 Stormdrain 14-Oct-16 Storm 2,4-D 3.48 0.05 0.015 PGC022 Stormdrain 14-Oct-16 Storm 2,4-D 0.866 0.05 0.015 PGC040 Receiving Water 14-Oct-16 Storm 2,4-D 0.604 0.05 0.015 PGC058 Receiving Water 14-Oct-16 Storm 2,4-D 1.63 0.05 0.015 Wal_CA Receiving water 14-Oct-16 Storm 2,4-D 0.188 0.05 0.015 FOL003 Stormdrain 17-Oct-16 Storm 2,4-D 1.85 0.05 0.015 PGC021 Stormdrain 20-Mar-17 Storm 2,4-D 0.708 0.05 0.015 PGC010 Stormdrain 21-Mar-17 Storm 2,4-D 2.18 0.05 0.015 PGC022 Stormdrain 21-Mar-17 Storm 2,4-D 4.92 0.05 0.015 PGC040 Receiving Water 21-Mar-17 Storm 2,4-D 1.4 0.05 0.015 PGC058 Receiving Water 21-Mar-17 Storm 2,4-D 1.05 0.05 0.015 FOL002 Stormdrain 10-Apr-17 Storm 2,4-D 0.727 0.05 0.015 FOL003 Stormdrain 10-Apr-17 Storm 2,4-D 0.192 0.05 0.015 ARC_Del_Paso Receiving Water 05-Jun-17 Nonstorm 2,4-D 0.444 0.05 0.015 PGC010 Stormdrain 05-Jun-17 Nonstorm 2,4-D 0.344 0.05 0.015 PGC021 Stormdrain 05-Jun-17 Nonstorm 2,4-D 0.57 0.05 0.015 PGC022 Stormdrain 05-Jun-17 Nonstorm 2,4-D 0.382 0.05 0.015 PGC040 Receiving Water 05-Jun-17 Nonstorm 2,4-D 0.15 0.05 0.015 PGC058 Receiving Water 05-Jun-17 Nonstorm 2,4-D trace 0.05 0.015 AL_VER Receiving Water 06-Jun-17 Nonstorm 2,4-D trace 0.05 0.015 COY060 Receiving Water 06-Jun-17 Nonstorm 2,4-D nd 0.05 0.015 GRY030 Receiving Water 06-Jun-17 Nonstorm 2,4-D trace 0.05 0.015 MCC040 Receiving Water 06-Jun-17 Nonstorm 2,4-D 0.365 0.05 0.015 Wal_CA Receiving water 06-Jun-17 Nonstorm 2,4-D 0.136 0.05 0.015 AL_VER Receiving Water 14-Oct-16 Nonstorm Azoxystrobin nd 0.02 0.0012 ARC_Del_Paso Receiving Water 14-Oct-16 Storm Azoxystrobin 0.028 0.02 0.0012 COY060 Receiving Water 14-Oct-16 Nonstorm Azoxystrobin nd 0.02 0.0012 GRY030 Receiving Water 14-Oct-16 Storm Azoxystrobin trace 0.02 0.0012 MCC040 Receiving Water 14-Oct-16 Storm Azoxystrobin nd 0.02 0.0012 PGC010 Stormdrain 14-Oct-16 Storm Azoxystrobin trace 0.02 0.0012 PGC021 Stormdrain 14-Oct-16 Storm Azoxystrobin trace 0.02 0.0012 PGC022 Stormdrain 14-Oct-16 Storm Azoxystrobin trace 0.02 0.0012 PGC040 Receiving Water 14-Oct-16 Storm Azoxystrobin trace 0.02 0.0012 PGC058 Receiving Water 14-Oct-16 Storm Azoxystrobin trace 0.02 0.0012 Wal_CA Receiving water 14-Oct-16 Storm Azoxystrobin trace 0.02 0.0012



RL (ug/L)

MDL (ug/L)

FOL003 Stormdrain 17-Oct-16 Storm Azoxystrobin 0.02 0.02 0.0012 PGC021 Stormdrain 20-Mar-17 Storm Azoxystrobin trace 0.02 0.0012 PGC010 Stormdrain 21-Mar-17 Storm Azoxystrobin trace 0.02 0.0012 PGC022 Stormdrain 21-Mar-17 Storm Azoxystrobin trace 0.02 0.0012 PGC040 Receiving Water 21-Mar-17 Storm Azoxystrobin trace 0.02 0.0012 PGC058 Receiving Water 21-Mar-17 Storm Azoxystrobin trace 0.02 0.0012 FOL002 Stormdrain 10-Apr-17 Storm Azoxystrobin trace 0.02 0.0012 FOL003 Stormdrain 10-Apr-17 Storm Azoxystrobin trace 0.02 0.0012 ARC_Del_Paso Receiving Water 05-Jun-17 Nonstorm Azoxystrobin trace 0.02 0.0012 PGC010 Stormdrain 05-Jun-17 Nonstorm Azoxystrobin trace 0.02 0.0012 PGC021 Stormdrain 05-Jun-17 Nonstorm Azoxystrobin nd 0.02 0.0012 PGC022 Stormdrain 05-Jun-17 Nonstorm Azoxystrobin nd 0.02 0.0012 PGC040 Receiving Water 05-Jun-17 Nonstorm Azoxystrobin nd 0.02 0.0012 PGC058 Receiving Water 05-Jun-17 Nonstorm Azoxystrobin nd 0.02 0.0012 AL_VER Receiving Water 06-Jun-17 Nonstorm Azoxystrobin nd 0.02 0.0012 COY060 Receiving Water 06-Jun-17 Nonstorm Azoxystrobin nd 0.02 0.0012 GRY030 Receiving Water 06-Jun-17 Nonstorm Azoxystrobin nd 0.02 0.0012 MCC040 Receiving Water 06-Jun-17 Nonstorm Azoxystrobin nd 0.02 0.0012 Wal_CA Receiving water 06-Jun-17 Nonstorm Azoxystrobin nd 0.02 0.0012 AL_VER Receiving Water 14-Oct-16 Nonstorm Bensulide nd 0.02 0.00066 ARC_Del_Paso Receiving Water 14-Oct-16 Storm Bensulide nd 0.02 0.00066 COY060 Receiving Water 14-Oct-16 Nonstorm Bensulide nd 0.02 0.00066 GRY030 Receiving Water 14-Oct-16 Storm Bensulide nd 0.02 0.00066 MCC040 Receiving Water 14-Oct-16 Storm Bensulide nd 0.02 0.00066 PGC010 Stormdrain 14-Oct-16 Storm Bensulide nd 0.02 0.00066 PGC021 Stormdrain 14-Oct-16 Storm Bensulide nd 0.02 0.00066 PGC022 Stormdrain 14-Oct-16 Storm Bensulide nd 0.02 0.00066 PGC040 Receiving Water 14-Oct-16 Storm Bensulide nd 0.02 0.00066 PGC058 Receiving Water 14-Oct-16 Storm Bensulide nd 0.02 0.00066 Wal_CA Receiving water 14-Oct-16 Storm Bensulide nd 0.02 0.00066 FOL003 Stormdrain 17-Oct-16 Storm Bensulide nd 0.02 0.00066 PGC021 Stormdrain 20-Mar-17 Storm Bensulide nd 0.02 0.00066 PGC010 Stormdrain 21-Mar-17 Storm Bensulide nd 0.02 0.00066 PGC022 Stormdrain 21-Mar-17 Storm Bensulide nd 0.02 0.00066 PGC040 Receiving Water 21-Mar-17 Storm Bensulide nd 0.02 0.00066 PGC058 Receiving Water 21-Mar-17 Storm Bensulide nd 0.02 0.00066 FOL002 Stormdrain 10-Apr-17 Storm Bensulide nd 0.02 0.00066 FOL003 Stormdrain 10-Apr-17 Storm Bensulide nd 0.02 0.00066 ARC_Del_Paso Receiving Water 05-Jun-17 Nonstorm Bensulide nd 0.02 0.00066 PGC010 Stormdrain 05-Jun-17 Nonstorm Bensulide nd 0.02 0.00066 PGC021 Stormdrain 05-Jun-17 Nonstorm Bensulide nd 0.02 0.00066 PGC022 Stormdrain 05-Jun-17 Nonstorm Bensulide nd 0.02 0.00066 PGC040 Receiving Water 05-Jun-17 Nonstorm Bensulide nd 0.02 0.00066 PGC058 Receiving Water 05-Jun-17 Nonstorm Bensulide nd 0.02 0.00066 AL_VER Receiving Water 06-Jun-17 Nonstorm Bensulide nd 0.02 0.00066



RL (ug/L)

MDL (ug/L)

COY060 Receiving Water 06-Jun-17 Nonstorm Bensulide nd 0.02 0.00066 GRY030 Receiving Water 06-Jun-17 Nonstorm Bensulide nd 0.02 0.00066 MCC040 Receiving Water 06-Jun-17 Nonstorm Bensulide nd 0.02 0.00066 Wal_CA Receiving water 06-Jun-17 Nonstorm Bensulide nd 0.02 0.00066 PGC010 Stormdrain 01-Aug-16 Nonstorm Bifenthrin 0.0046 0.001 0.00091 PGC021 Stormdrain 01-Aug-16 Nonstorm Bifenthrin 0.0021 0.001 0.00091 PGC022 Stormdrain 01-Aug-16 Nonstorm Bifenthrin 0.0029 0.001 0.00091 PGC040 Receiving Water 01-Aug-16 Nonstorm Bifenthrin nd 0.001 0.00091 AL_VER Receiving Water 14-Oct-16 Nonstorm Bifenthrin nd 0.001 0.00091 ARC_Del_Paso Receiving Water 14-Oct-16 Storm Bifenthrin 0.0037 0.001 0.00091 COY060 Receiving Water 14-Oct-16 Nonstorm Bifenthrin nd 0.001 0.00091 GRY030 Receiving Water 14-Oct-16 Storm Bifenthrin 0.0066 0.001 0.00091 MCC040 Receiving Water 14-Oct-16 Storm Bifenthrin 0.0155 0.001 0.00091 PGC010 Stormdrain 14-Oct-16 Storm Bifenthrin 0.0048 0.001 0.00091 PGC021 Stormdrain 14-Oct-16 Storm Bifenthrin 0.0134 0.001 0.00091 PGC022 Stormdrain 14-Oct-16 Storm Bifenthrin 0.0188 0.001 0.00091 PGC040 Receiving Water 14-Oct-16 Storm Bifenthrin 0.0144 0.001 0.00091 PGC058 Receiving Water 14-Oct-16 Storm Bifenthrin 0.0051 0.001 0.00091 Wal_CA Receiving water 14-Oct-16 Storm Bifenthrin 0.0088 0.001 0.00091 FOL003 Stormdrain 17-Oct-16 Storm Bifenthrin 0.0042 0.001 0.00091 PGC021 Stormdrain 20-Mar-17 Storm Bifenthrin 0.0219 0.001 0.00091 PGC010 Stormdrain 21-Mar-17 Storm Bifenthrin 0.0057 0.001 0.00091 PGC022 Stormdrain 21-Mar-17 Storm Bifenthrin 0.0211 0.001 0.00091 PGC040 Receiving Water 21-Mar-17 Storm Bifenthrin 0.0087 0.001 0.00091 PGC058 Receiving Water 21-Mar-17 Storm Bifenthrin 0.0028 0.001 0.00091 FOL002 Stormdrain 10-Apr-17 Storm Bifenthrin 0.0033 0.001 0.00091 FOL003 Stormdrain 10-Apr-17 Storm Bifenthrin 0.0018 0.001 0.00091 ARC_Del_Paso Receiving Water 05-Jun-17 Nonstorm Bifenthrin 0.0012 0.001 0.00091 PGC010 Stormdrain 05-Jun-17 Nonstorm Bifenthrin 0.0039 0.001 0.00091 PGC021 Stormdrain 05-Jun-17 Nonstorm Bifenthrin 0.0255 0.001 0.00091 PGC022 Stormdrain 05-Jun-17 Nonstorm Bifenthrin 0.0042 0.001 0.00091 PGC040 Receiving Water 05-Jun-17 Nonstorm Bifenthrin nd 0.001 0.00091 PGC058 Receiving Water 05-Jun-17 Nonstorm Bifenthrin nd 0.001 0.00091 AL_VER Receiving Water 06-Jun-17 Nonstorm Bifenthrin nd 0.001 0.00091 COY060 Receiving Water 06-Jun-17 Nonstorm Bifenthrin nd 0.001 0.00091 GRY030 Receiving Water 06-Jun-17 Nonstorm Bifenthrin nd 0.001 0.00091 MCC040 Receiving Water 06-Jun-17 Nonstorm Bifenthrin 0.0014 0.001 0.00091 Wal_CA Receiving water 06-Jun-17 Nonstorm Bifenthrin nd 0.001 0.00091 PGC010 Stormdrain 01-Aug-16 Nonstorm Bromacil nd 0.05 0.02 PGC021 Stormdrain 01-Aug-16 Nonstorm Bromacil nd 0.05 0.02 PGC022 Stormdrain 01-Aug-16 Nonstorm Bromacil nd 0.05 0.02 PGC040 Receiving Water 01-Aug-16 Nonstorm Bromacil nd 0.05 0.02 AL_VER Receiving Water 14-Oct-16 Nonstorm Bromacil trace 0.02 0.00098 ARC_Del_Paso Receiving Water 14-Oct-16 Storm Bromacil nd 0.02 0.00098 COY060 Receiving Water 14-Oct-16 Nonstorm Bromacil nd 0.02 0.00098



RL (ug/L)

MDL (ug/L)

GRY030 Receiving Water 14-Oct-16 Storm Bromacil nd 0.02 0.00098 MCC040 Receiving Water 14-Oct-16 Storm Bromacil nd 0.02 0.00098 PGC010 Stormdrain 14-Oct-16 Storm Bromacil nd 0.02 0.00098 PGC021 Stormdrain 14-Oct-16 Storm Bromacil nd 0.02 0.00098 PGC022 Stormdrain 14-Oct-16 Storm Bromacil nd 0.02 0.00098 PGC040 Receiving Water 14-Oct-16 Storm Bromacil nd 0.02 0.00098 PGC058 Receiving Water 14-Oct-16 Storm Bromacil nd 0.02 0.00098 Wal_CA Receiving water 14-Oct-16 Storm Bromacil nd 0.02 0.00098 FOL003 Stormdrain 17-Oct-16 Storm Bromacil nd 0.02 0.00098 PGC021 Stormdrain 20-Mar-17 Storm Bromacil nd 0.02 0.00098 PGC010 Stormdrain 21-Mar-17 Storm Bromacil nd 0.02 0.00098 PGC022 Stormdrain 21-Mar-17 Storm Bromacil nd 0.02 0.00098 PGC040 Receiving Water 21-Mar-17 Storm Bromacil nd 0.02 0.00098 PGC058 Receiving Water 21-Mar-17 Storm Bromacil nd 0.02 0.00098 FOL002 Stormdrain 10-Apr-17 Storm Bromacil nd 0.02 0.00098 FOL003 Stormdrain 10-Apr-17 Storm Bromacil nd 0.02 0.00098 ARC_Del_Paso Receiving Water 05-Jun-17 Nonstorm Bromacil nd 0.02 0.00098 PGC010 Stormdrain 05-Jun-17 Nonstorm Bromacil nd 0.02 0.00098 PGC021 Stormdrain 05-Jun-17 Nonstorm Bromacil nd 0.02 0.00098 PGC022 Stormdrain 05-Jun-17 Nonstorm Bromacil nd 0.02 0.00098 PGC040 Receiving Water 05-Jun-17 Nonstorm Bromacil nd 0.02 0.00098 PGC058 Receiving Water 05-Jun-17 Nonstorm Bromacil nd 0.02 0.00098 AL_VER Receiving Water 06-Jun-17 Nonstorm Bromacil 0.027 0.02 0.00098 COY060 Receiving Water 06-Jun-17 Nonstorm Bromacil nd 0.02 0.00098 GRY030 Receiving Water 06-Jun-17 Nonstorm Bromacil nd 0.02 0.00098 MCC040 Receiving Water 06-Jun-17 Nonstorm Bromacil nd 0.02 0.00098 Wal_CA Receiving water 06-Jun-17 Nonstorm Bromacil nd 0.02 0.00098 PGC010 Stormdrain 01-Aug-16 Nonstorm Carbaryl nd 0.05 0.011 PGC021 Stormdrain 01-Aug-16 Nonstorm Carbaryl nd 0.05 0.011 PGC022 Stormdrain 01-Aug-16 Nonstorm Carbaryl nd 0.05 0.011 PGC040 Receiving Water 01-Aug-16 Nonstorm Carbaryl nd 0.05 0.011 ARC_Del_Paso Receiving Water 14-Oct-16 Storm Carbaryl nd 0.05 0.011 PGC010 Stormdrain 14-Oct-16 Storm Carbaryl nd 0.05 0.011 PGC021 Stormdrain 14-Oct-16 Storm Carbaryl nd 0.05 0.011 PGC022 Stormdrain 14-Oct-16 Storm Carbaryl nd 0.05 0.011 PGC040 Receiving Water 14-Oct-16 Storm Carbaryl nd 0.05 0.011 PGC058 Receiving Water 14-Oct-16 Storm Carbaryl nd 0.05 0.011 PGC021 Stormdrain 20-Mar-17 Storm Carbaryl nd 0.05 0.011 PGC010 Stormdrain 21-Mar-17 Storm Carbaryl 0.0675 0.05 0.011 PGC022 Stormdrain 21-Mar-17 Storm Carbaryl nd 0.05 0.011 PGC040 Receiving Water 21-Mar-17 Storm Carbaryl nd 0.05 0.011 ARC_Del_Paso Receiving Water 05-Jun-17 Nonstorm Carbaryl nd 0.05 0.011 PGC010 Stormdrain 05-Jun-17 Nonstorm Carbaryl trace 0.05 0.011 PGC021 Stormdrain 05-Jun-17 Nonstorm Carbaryl nd 0.05 0.011 PGC022 Stormdrain 05-Jun-17 Nonstorm Carbaryl nd 0.05 0.011



RL (ug/L)

MDL (ug/L)

PGC040 Receiving Water 05-Jun-17 Nonstorm Carbaryl 0.091 0.05 0.011 PGC058 Receiving Water 05-Jun-17 Nonstorm Carbaryl nd 0.05 0.011 AL_VER Receiving Water 14-Oct-16 Nonstorm Chlorantraniliprole nd 0.02 0.00182 ARC_Del_Paso Receiving Water 14-Oct-16 Storm Chlorantraniliprole trace 0.02 0.00182 COY060 Receiving Water 14-Oct-16 Nonstorm Chlorantraniliprole nd 0.02 0.00182 GRY030 Receiving Water 14-Oct-16 Storm Chlorantraniliprole nd 0.02 0.00182 MCC040 Receiving Water 14-Oct-16 Storm Chlorantraniliprole nd 0.02 0.00182 PGC010 Stormdrain 14-Oct-16 Storm Chlorantraniliprole trace 0.02 0.00182 PGC021 Stormdrain 14-Oct-16 Storm Chlorantraniliprole trace 0.02 0.00182 PGC022 Stormdrain 14-Oct-16 Storm Chlorantraniliprole trace 0.02 0.00182 PGC040 Receiving Water 14-Oct-16 Storm Chlorantraniliprole trace 0.02 0.00182 PGC058 Receiving Water 14-Oct-16 Storm Chlorantraniliprole trace 0.02 0.00182 Wal_CA Receiving water 14-Oct-16 Storm Chlorantraniliprole trace 0.02 0.00182 FOL003 Stormdrain 17-Oct-16 Storm Chlorantraniliprole trace 0.02 0.00182 PGC021 Stormdrain 20-Mar-17 Storm Chlorantraniliprole nd 0.02 0.00182 PGC010 Stormdrain 21-Mar-17 Storm Chlorantraniliprole nd 0.02 0.00182 PGC022 Stormdrain 21-Mar-17 Storm Chlorantraniliprole nd 0.02 0.00182 PGC040 Receiving Water 21-Mar-17 Storm Chlorantraniliprole nd 0.02 0.00182 PGC058 Receiving Water 21-Mar-17 Storm Chlorantraniliprole trace 0.02 0.00182 FOL002 Stormdrain 10-Apr-17 Storm Chlorantraniliprole nd 0.02 0.00182 FOL003 Stormdrain 10-Apr-17 Storm Chlorantraniliprole nd 0.02 0.00182 ARC_Del_Paso Receiving Water 05-Jun-17 Nonstorm Chlorantraniliprole trace 0.02 0.00182 PGC010 Stormdrain 05-Jun-17 Nonstorm Chlorantraniliprole nd 0.02 0.00182 PGC021 Stormdrain 05-Jun-17 Nonstorm Chlorantraniliprole nd 0.02 0.00182 PGC022 Stormdrain 05-Jun-17 Nonstorm Chlorantraniliprole nd 0.02 0.00182 PGC040 Receiving Water 05-Jun-17 Nonstorm Chlorantraniliprole trace 0.02 0.00182 PGC058 Receiving Water 05-Jun-17 Nonstorm Chlorantraniliprole trace 0.02 0.00182 AL_VER Receiving Water 06-Jun-17 Nonstorm Chlorantraniliprole trace 0.02 0.00182 COY060 Receiving Water 06-Jun-17 Nonstorm Chlorantraniliprole nd 0.02 0.00182 GRY030 Receiving Water 06-Jun-17 Nonstorm Chlorantraniliprole trace 0.02 0.00182 MCC040 Receiving Water 06-Jun-17 Nonstorm Chlorantraniliprole nd 0.02 0.00182 Wal_CA Receiving water 06-Jun-17 Nonstorm Chlorantraniliprole nd 0.02 0.00182 PGC010 Stormdrain 01-Aug-16 Nonstorm Chlorpyrifos nd 0.01 0.00079 PGC021 Stormdrain 01-Aug-16 Nonstorm Chlorpyrifos nd 0.01 0.00079 PGC022 Stormdrain 01-Aug-16 Nonstorm Chlorpyrifos nd 0.01 0.00079 PGC040 Receiving Water 01-Aug-16 Nonstorm Chlorpyrifos nd 0.01 0.00079 AL_VER Receiving Water 14-Oct-16 Nonstorm Chlorpyrifos nd 0.02 0.00123 ARC_Del_Paso Receiving Water 14-Oct-16 Storm Chlorpyrifos nd 0.02 0.00123 COY060 Receiving Water 14-Oct-16 Nonstorm Chlorpyrifos nd 0.02 0.00123 GRY030 Receiving Water 14-Oct-16 Storm Chlorpyrifos nd 0.02 0.00123 MCC040 Receiving Water 14-Oct-16 Storm Chlorpyrifos nd 0.02 0.00123 PGC010 Stormdrain 14-Oct-16 Storm Chlorpyrifos nd 0.02 0.00123 PGC021 Stormdrain 14-Oct-16 Storm Chlorpyrifos nd 0.02 0.00123 PGC022 Stormdrain 14-Oct-16 Storm Chlorpyrifos nd 0.02 0.00123 PGC040 Receiving Water 14-Oct-16 Storm Chlorpyrifos nd 0.02 0.00123



RL (ug/L)

MDL (ug/L)

PGC058 Receiving Water 14-Oct-16 Storm Chlorpyrifos nd 0.02 0.00123 Wal_CA Receiving water 14-Oct-16 Storm Chlorpyrifos nd 0.02 0.00123 FOL003 Stormdrain 17-Oct-16 Storm Chlorpyrifos nd 0.02 0.00123 PGC021 Stormdrain 20-Mar-17 Storm Chlorpyrifos nd 0.02 0.00123 PGC010 Stormdrain 21-Mar-17 Storm Chlorpyrifos nd 0.02 0.00123 PGC022 Stormdrain 21-Mar-17 Storm Chlorpyrifos nd 0.02 0.00123 PGC040 Receiving Water 21-Mar-17 Storm Chlorpyrifos nd 0.02 0.00123 PGC058 Receiving Water 21-Mar-17 Storm Chlorpyrifos nd 0.02 0.00123 FOL002 Stormdrain 10-Apr-17 Storm Chlorpyrifos nd 0.02 0.00123 FOL003 Stormdrain 10-Apr-17 Storm Chlorpyrifos nd 0.02 0.00123 ARC_Del_Paso Receiving Water 05-Jun-17 Nonstorm Chlorpyrifos nd 0.02 0.00123 PGC010 Stormdrain 05-Jun-17 Nonstorm Chlorpyrifos nd 0.02 0.00123 PGC021 Stormdrain 05-Jun-17 Nonstorm Chlorpyrifos nd 0.02 0.00123 PGC022 Stormdrain 05-Jun-17 Nonstorm Chlorpyrifos nd 0.02 0.00123 PGC040 Receiving Water 05-Jun-17 Nonstorm Chlorpyrifos nd 0.02 0.00123 PGC058 Receiving Water 05-Jun-17 Nonstorm Chlorpyrifos nd 0.02 0.00123 AL_VER Receiving Water 06-Jun-17 Nonstorm Chlorpyrifos nd 0.02 0.00123 COY060 Receiving Water 06-Jun-17 Nonstorm Chlorpyrifos nd 0.02 0.00123 GRY030 Receiving Water 06-Jun-17 Nonstorm Chlorpyrifos nd 0.02 0.00123 MCC040 Receiving Water 06-Jun-17 Nonstorm Chlorpyrifos nd 0.02 0.00123 Wal_CA Receiving water 06-Jun-17 Nonstorm Chlorpyrifos nd 0.02 0.00123 PGC010 Stormdrain 01-Aug-16 Nonstorm Cyfluthrin 0.0065 0.002 0.00146 PGC021 Stormdrain 01-Aug-16 Nonstorm Cyfluthrin nd 0.002 0.00146 PGC022 Stormdrain 01-Aug-16 Nonstorm Cyfluthrin nd 0.002 0.00146 PGC040 Receiving Water 01-Aug-16 Nonstorm Cyfluthrin nd 0.002 0.00146 AL_VER Receiving Water 14-Oct-16 Nonstorm Cyfluthrin nd 0.002 0.00146 ARC_Del_Paso Receiving Water 14-Oct-16 Storm Cyfluthrin 0.0023 0.002 0.00146 COY060 Receiving Water 14-Oct-16 Nonstorm Cyfluthrin nd 0.002 0.00146 GRY030 Receiving Water 14-Oct-16 Storm Cyfluthrin nd 0.002 0.00146 MCC040 Receiving Water 14-Oct-16 Storm Cyfluthrin 0.0021 0.002 0.00146 PGC010 Stormdrain 14-Oct-16 Storm Cyfluthrin 0.0024 0.002 0.00146 PGC021 Stormdrain 14-Oct-16 Storm Cyfluthrin nd 0.002 0.00146 PGC022 Stormdrain 14-Oct-16 Storm Cyfluthrin 0.0023 0.002 0.00146 PGC040 Receiving Water 14-Oct-16 Storm Cyfluthrin 0.0059 0.002 0.00146 PGC058 Receiving Water 14-Oct-16 Storm Cyfluthrin 0.0037 0.002 0.00146 Wal_CA Receiving water 14-Oct-16 Storm Cyfluthrin nd 0.002 0.00146 FOL003 Stormdrain 17-Oct-16 Storm Cyfluthrin nd 0.002 0.00146 PGC021 Stormdrain 20-Mar-17 Storm Cyfluthrin nd 0.002 0.00146 PGC010 Stormdrain 21-Mar-17 Storm Cyfluthrin nd 0.002 0.00146 PGC022 Stormdrain 21-Mar-17 Storm Cyfluthrin 0.0043 0.002 0.00146 PGC040 Receiving Water 21-Mar-17 Storm Cyfluthrin 0.0027 0.002 0.00146 PGC058 Receiving Water 21-Mar-17 Storm Cyfluthrin nd 0.002 0.00146 FOL002 Stormdrain 10-Apr-17 Storm Cyfluthrin nd 0.002 0.00146 FOL003 Stormdrain 10-Apr-17 Storm Cyfluthrin nd 0.002 0.00146 ARC_Del_Paso Receiving Water 05-Jun-17 Nonstorm Cyfluthrin nd 0.005 0.00146



RL (ug/L)

MDL (ug/L)

PGC010 Stormdrain 05-Jun-17 Nonstorm Cyfluthrin nd 0.005 0.00146 PGC021 Stormdrain 05-Jun-17 Nonstorm Cyfluthrin 0.0073 0.005 0.00146 PGC022 Stormdrain 05-Jun-17 Nonstorm Cyfluthrin nd 0.005 0.00146 PGC040 Receiving Water 05-Jun-17 Nonstorm Cyfluthrin nd 0.005 0.00146 PGC058 Receiving Water 05-Jun-17 Nonstorm Cyfluthrin nd 0.005 0.00146 AL_VER Receiving Water 06-Jun-17 Nonstorm Cyfluthrin nd 0.005 0.00146 COY060 Receiving Water 06-Jun-17 Nonstorm Cyfluthrin nd 0.005 0.00146 GRY030 Receiving Water 06-Jun-17 Nonstorm Cyfluthrin nd 0.005 0.00146 MCC040 Receiving Water 06-Jun-17 Nonstorm Cyfluthrin nd 0.005 0.00146 Wal_CA Receiving water 06-Jun-17 Nonstorm Cyfluthrin nd 0.005 0.00146 PGC010 Stormdrain 01-Aug-16 Nonstorm Cypermethrin nd 0.005 0.00154 PGC021 Stormdrain 01-Aug-16 Nonstorm Cypermethrin nd 0.005 0.00154 PGC022 Stormdrain 01-Aug-16 Nonstorm Cypermethrin nd 0.005 0.00154 PGC040 Receiving Water 01-Aug-16 Nonstorm Cypermethrin nd 0.005 0.00154 AL_VER Receiving Water 14-Oct-16 Nonstorm Cypermethrin nd 0.005 0.00154 ARC_Del_Paso Receiving Water 14-Oct-16 Storm Cypermethrin nd 0.005 0.00154 COY060 Receiving Water 14-Oct-16 Nonstorm Cypermethrin nd 0.005 0.00154 GRY030 Receiving Water 14-Oct-16 Storm Cypermethrin nd 0.005 0.00154 MCC040 Receiving Water 14-Oct-16 Storm Cypermethrin nd 0.005 0.00154 PGC010 Stormdrain 14-Oct-16 Storm Cypermethrin nd 0.005 0.00154 PGC021 Stormdrain 14-Oct-16 Storm Cypermethrin nd 0.005 0.00154 PGC022 Stormdrain 14-Oct-16 Storm Cypermethrin nd 0.005 0.00154 PGC040 Receiving Water 14-Oct-16 Storm Cypermethrin nd 0.005 0.00154 PGC058 Receiving Water 14-Oct-16 Storm Cypermethrin nd 0.005 0.00154 Wal_CA Receiving water 14-Oct-16 Storm Cypermethrin nd 0.005 0.00154 FOL003 Stormdrain 17-Oct-16 Storm Cypermethrin nd 0.005 0.00154 PGC021 Stormdrain 20-Mar-17 Storm Cypermethrin nd 0.005 0.00154 PGC010 Stormdrain 21-Mar-17 Storm Cypermethrin nd 0.005 0.00154 PGC022 Stormdrain 21-Mar-17 Storm Cypermethrin nd 0.005 0.00154 PGC040 Receiving Water 21-Mar-17 Storm Cypermethrin nd 0.005 0.00154 PGC058 Receiving Water 21-Mar-17 Storm Cypermethrin nd 0.005 0.00154 FOL002 Stormdrain 10-Apr-17 Storm Cypermethrin nd 0.005 0.00154 FOL003 Stormdrain 10-Apr-17 Storm Cypermethrin nd 0.005 0.00154 ARC_Del_Paso Receiving Water 05-Jun-17 Nonstorm Cypermethrin nd 0.002 0.00154 PGC010 Stormdrain 05-Jun-17 Nonstorm Cypermethrin nd 0.002 0.00154 PGC021 Stormdrain 05-Jun-17 Nonstorm Cypermethrin nd 0.002 0.00154 PGC022 Stormdrain 05-Jun-17 Nonstorm Cypermethrin nd 0.002 0.00154 PGC040 Receiving Water 05-Jun-17 Nonstorm Cypermethrin nd 0.002 0.00154 PGC058 Receiving Water 05-Jun-17 Nonstorm Cypermethrin nd 0.002 0.00154 AL_VER Receiving Water 06-Jun-17 Nonstorm Cypermethrin nd 0.002 0.00154 COY060 Receiving Water 06-Jun-17 Nonstorm Cypermethrin nd 0.002 0.00154 GRY030 Receiving Water 06-Jun-17 Nonstorm Cypermethrin nd 0.002 0.00154 MCC040 Receiving Water 06-Jun-17 Nonstorm Cypermethrin nd 0.002 0.00154 Wal_CA Receiving water 06-Jun-17 Nonstorm Cypermethrin nd 0.002 0.00154 PGC010 Stormdrain 01-Aug-16 Nonstorm Deltamethrin/Tralomethrin nd 0.005 0.00177



RL (ug/L)

MDL (ug/L)

PGC021 Stormdrain 01-Aug-16 Nonstorm Deltamethrin/Tralomethrin nd 0.005 0.00177 PGC022 Stormdrain 01-Aug-16 Nonstorm Deltamethrin/Tralomethrin nd 0.005 0.00177 PGC040 Receiving Water 01-Aug-16 Nonstorm Deltamethrin/Tralomethrin nd 0.005 0.00177 AL_VER Receiving Water 14-Oct-16 Nonstorm Deltamethrin/Tralomethrin nd 0.005 0.00177 ARC_Del_Paso Receiving Water 14-Oct-16 Storm Deltamethrin/Tralomethrin nd 0.005 0.00177 COY060 Receiving Water 14-Oct-16 Nonstorm Deltamethrin/Tralomethrin nd 0.005 0.00177 GRY030 Receiving Water 14-Oct-16 Storm Deltamethrin/Tralomethrin 0.0051 0.005 0.00177 MCC040 Receiving Water 14-Oct-16 Storm Deltamethrin/Tralomethrin 0.014 0.005 0.00177 PGC010 Stormdrain 14-Oct-16 Storm Deltamethrin/Tralomethrin nd 0.005 0.00177 PGC021 Stormdrain 14-Oct-16 Storm Deltamethrin/Tralomethrin 0.0067 0.005 0.00177 PGC022 Stormdrain 14-Oct-16 Storm Deltamethrin/Tralomethrin 0.0059 0.005 0.00177 PGC040 Receiving Water 14-Oct-16 Storm Deltamethrin/Tralomethrin nd 0.005 0.00177 PGC058 Receiving Water 14-Oct-16 Storm Deltamethrin/Tralomethrin nd 0.005 0.00177 Wal_CA Receiving water 14-Oct-16 Storm Deltamethrin/Tralomethrin 0.0097 0.005 0.00177 FOL003 Stormdrain 17-Oct-16 Storm Deltamethrin/Tralomethrin nd 0.005 0.00177 PGC021 Stormdrain 20-Mar-17 Storm Deltamethrin/Tralomethrin 0.0057 0.005 0.00177 PGC010 Stormdrain 21-Mar-17 Storm Deltamethrin/Tralomethrin 0.0074 0.005 0.00177 PGC022 Stormdrain 21-Mar-17 Storm Deltamethrin/Tralomethrin nd 0.005 0.00177 PGC040 Receiving Water 21-Mar-17 Storm Deltamethrin/Tralomethrin nd 0.005 0.00177 PGC058 Receiving Water 21-Mar-17 Storm Deltamethrin/Tralomethrin nd 0.005 0.00177 FOL002 Stormdrain 10-Apr-17 Storm Deltamethrin/Tralomethrin nd 0.005 0.00177 FOL003 Stormdrain 10-Apr-17 Storm Deltamethrin/Tralomethrin nd 0.005 0.00177 ARC_Del_Paso Receiving Water 05-Jun-17 Nonstorm Deltamethrin/Tralomethrin nd 0.005 0.00177 PGC010 Stormdrain 05-Jun-17 Nonstorm Deltamethrin/Tralomethrin nd 0.005 0.00177 PGC021 Stormdrain 05-Jun-17 Nonstorm Deltamethrin/Tralomethrin 0.0394 0.005 0.00177 PGC022 Stormdrain 05-Jun-17 Nonstorm Deltamethrin/Tralomethrin nd 0.005 0.00177 PGC040 Receiving Water 05-Jun-17 Nonstorm Deltamethrin/Tralomethrin nd 0.005 0.00177 PGC058 Receiving Water 05-Jun-17 Nonstorm Deltamethrin/Tralomethrin nd 0.005 0.00177 AL_VER Receiving Water 06-Jun-17 Nonstorm Deltamethrin/Tralomethrin nd 0.005 0.00177 COY060 Receiving Water 06-Jun-17 Nonstorm Deltamethrin/Tralomethrin nd 0.005 0.00177 GRY030 Receiving Water 06-Jun-17 Nonstorm Deltamethrin/Tralomethrin nd 0.005 0.00177 MCC040 Receiving Water 06-Jun-17 Nonstorm Deltamethrin/Tralomethrin nd 0.005 0.00177 Wal_CA Receiving water 06-Jun-17 Nonstorm Deltamethrin/Tralomethrin nd 0.005 0.00177 PGC010 Stormdrain 01-Aug-16 Nonstorm Desulfinyl fipronil trace 0.02 0.003 PGC021 Stormdrain 01-Aug-16 Nonstorm Desulfinyl fipronil trace 0.02 0.003 PGC022 Stormdrain 01-Aug-16 Nonstorm Desulfinyl fipronil trace 0.02 0.003 PGC040 Receiving Water 01-Aug-16 Nonstorm Desulfinyl fipronil nd 0.02 0.003 AL_VER Receiving Water 14-Oct-16 Nonstorm Desulfinyl fipronil nd 0.013 0.0011 ARC_Del_Paso Receiving Water 14-Oct-16 Storm Desulfinyl fipronil trace 0.013 0.0011 COY060 Receiving Water 14-Oct-16 Nonstorm Desulfinyl fipronil nd 0.013 0.0011 GRY030 Receiving Water 14-Oct-16 Storm Desulfinyl fipronil nd 0.013 0.0011 MCC040 Receiving Water 14-Oct-16 Storm Desulfinyl fipronil trace 0.013 0.0011 PGC010 Stormdrain 14-Oct-16 Storm Desulfinyl fipronil 0.014 0.013 0.0011 PGC021 Stormdrain 14-Oct-16 Storm Desulfinyl fipronil trace 0.013 0.0011 PGC022 Stormdrain 14-Oct-16 Storm Desulfinyl fipronil 0.018 0.013 0.0011



RL (ug/L)

MDL (ug/L)

PGC040 Receiving Water 14-Oct-16 Storm Desulfinyl fipronil 0.0143 0.013 0.0011 PGC058 Receiving Water 14-Oct-16 Storm Desulfinyl fipronil trace 0.013 0.0011 Wal_CA Receiving water 14-Oct-16 Storm Desulfinyl fipronil trace 0.013 0.0011 FOL003 Stormdrain 17-Oct-16 Storm Desulfinyl fipronil trace 0.013 0.0011 PGC021 Stormdrain 20-Mar-17 Storm Desulfinyl fipronil trace 0.01 0.0011 PGC010 Stormdrain 21-Mar-17 Storm Desulfinyl fipronil 0.01 0.01 0.0011 PGC022 Stormdrain 21-Mar-17 Storm Desulfinyl fipronil trace 0.01 0.0011 PGC040 Receiving Water 21-Mar-17 Storm Desulfinyl fipronil trace 0.01 0.0011 PGC058 Receiving Water 21-Mar-17 Storm Desulfinyl fipronil trace 0.01 0.0011 FOL002 Stormdrain 10-Apr-17 Storm Desulfinyl fipronil 0.01 0.01 0.0011 FOL003 Stormdrain 10-Apr-17 Storm Desulfinyl fipronil 0.013 0.01 0.0011 ARC_Del_Paso Receiving Water 05-Jun-17 Nonstorm Desulfinyl fipronil trace 0.01 0.0011 PGC010 Stormdrain 05-Jun-17 Nonstorm Desulfinyl fipronil trace 0.01 0.0011 PGC021 Stormdrain 05-Jun-17 Nonstorm Desulfinyl fipronil trace 0.01 0.0011 PGC022 Stormdrain 05-Jun-17 Nonstorm Desulfinyl fipronil 0.014 0.01 0.0011 PGC040 Receiving Water 05-Jun-17 Nonstorm Desulfinyl fipronil nd 0.01 0.0011 PGC058 Receiving Water 05-Jun-17 Nonstorm Desulfinyl fipronil nd 0.01 0.0011 AL_VER Receiving Water 06-Jun-17 Nonstorm Desulfinyl fipronil nd 0.01 0.0011 COY060 Receiving Water 06-Jun-17 Nonstorm Desulfinyl fipronil nd 0.01 0.0011 GRY030 Receiving Water 06-Jun-17 Nonstorm Desulfinyl fipronil nd 0.01 0.0011 MCC040 Receiving Water 06-Jun-17 Nonstorm Desulfinyl fipronil nd 0.01 0.0011 Wal_CA Receiving water 06-Jun-17 Nonstorm Desulfinyl fipronil nd 0.01 0.0011 PGC010 Stormdrain 01-Aug-16 Nonstorm Desulfinyl fipronil amide nd 0.03 0.005 PGC021 Stormdrain 01-Aug-16 Nonstorm Desulfinyl fipronil amide nd 0.03 0.005 PGC022 Stormdrain 01-Aug-16 Nonstorm Desulfinyl fipronil amide nd 0.03 0.005 PGC040 Receiving Water 01-Aug-16 Nonstorm Desulfinyl fipronil amide nd 0.03 0.005 AL_VER Receiving Water 14-Oct-16 Nonstorm Desulfinyl fipronil amide nd 0.013 0.00244 ARC_Del_Paso Receiving Water 14-Oct-16 Storm Desulfinyl fipronil amide trace 0.013 0.00244 COY060 Receiving Water 14-Oct-16 Nonstorm Desulfinyl fipronil amide nd 0.013 0.00244 GRY030 Receiving Water 14-Oct-16 Storm Desulfinyl fipronil amide nd 0.013 0.00244 MCC040 Receiving Water 14-Oct-16 Storm Desulfinyl fipronil amide trace 0.013 0.00244 PGC010 Stormdrain 14-Oct-16 Storm Desulfinyl fipronil amide nd 0.013 0.00244 PGC021 Stormdrain 14-Oct-16 Storm Desulfinyl fipronil amide nd 0.013 0.00244 PGC022 Stormdrain 14-Oct-16 Storm Desulfinyl fipronil amide nd 0.013 0.00244 PGC040 Receiving Water 14-Oct-16 Storm Desulfinyl fipronil amide nd 0.013 0.00244 PGC058 Receiving Water 14-Oct-16 Storm Desulfinyl fipronil amide trace 0.013 0.00244 Wal_CA Receiving water 14-Oct-16 Storm Desulfinyl fipronil amide nd 0.013 0.00244 FOL003 Stormdrain 17-Oct-16 Storm Desulfinyl fipronil amide trace 0.013 0.00244 PGC021 Stormdrain 20-Mar-17 Storm Desulfinyl fipronil amide nd 0.01 0.00244 PGC010 Stormdrain 21-Mar-17 Storm Desulfinyl fipronil amide nd 0.01 0.00244 PGC022 Stormdrain 21-Mar-17 Storm Desulfinyl fipronil amide nd 0.01 0.00244 PGC040 Receiving Water 21-Mar-17 Storm Desulfinyl fipronil amide nd 0.01 0.00244 PGC058 Receiving Water 21-Mar-17 Storm Desulfinyl fipronil amide nd 0.01 0.00244 FOL002 Stormdrain 10-Apr-17 Storm Desulfinyl fipronil amide nd 0.01 0.00244 FOL003 Stormdrain 10-Apr-17 Storm Desulfinyl fipronil amide nd 0.01 0.00244



RL (ug/L)

MDL (ug/L)

ARC_Del_Paso Receiving Water 05-Jun-17 Nonstorm Desulfinyl fipronil amide nd 0.01 0.00244 PGC010 Stormdrain 05-Jun-17 Nonstorm Desulfinyl fipronil amide nd 0.01 0.00244 PGC021 Stormdrain 05-Jun-17 Nonstorm Desulfinyl fipronil amide nd 0.01 0.00244 PGC022 Stormdrain 05-Jun-17 Nonstorm Desulfinyl fipronil amide trace 0.01 0.00244 PGC040 Receiving Water 05-Jun-17 Nonstorm Desulfinyl fipronil amide nd 0.01 0.00244 PGC058 Receiving Water 05-Jun-17 Nonstorm Desulfinyl fipronil amide nd 0.01 0.00244 AL_VER Receiving Water 06-Jun-17 Nonstorm Desulfinyl fipronil amide nd 0.01 0.00244 COY060 Receiving Water 06-Jun-17 Nonstorm Desulfinyl fipronil amide nd 0.01 0.00244 GRY030 Receiving Water 06-Jun-17 Nonstorm Desulfinyl fipronil amide nd 0.01 0.00244 MCC040 Receiving Water 06-Jun-17 Nonstorm Desulfinyl fipronil amide nd 0.01 0.00244 Wal_CA Receiving water 06-Jun-17 Nonstorm Desulfinyl fipronil amide nd 0.01 0.00244 PGC010 Stormdrain 01-Aug-16 Nonstorm Diazinon nd 0.01 0.0012 PGC021 Stormdrain 01-Aug-16 Nonstorm Diazinon nd 0.01 0.0012 PGC022 Stormdrain 01-Aug-16 Nonstorm Diazinon nd 0.01 0.0012 PGC040 Receiving Water 01-Aug-16 Nonstorm Diazinon nd 0.01 0.0012 PGC010 Stormdrain 01-Aug-16 Nonstorm Dicamba 0.18 0.05 0.017 PGC021 Stormdrain 01-Aug-16 Nonstorm Dicamba 0.506 0.05 0.017 PGC022 Stormdrain 01-Aug-16 Nonstorm Dicamba 0.31 0.05 0.017 PGC040 Receiving Water 01-Aug-16 Nonstorm Dicamba nd 0.05 0.017 AL_VER Receiving Water 14-Oct-16 Nonstorm Dicamba nd 0.05 0.017 ARC_Del_Paso Receiving Water 14-Oct-16 Storm Dicamba trace 0.05 0.017 COY060 Receiving Water 14-Oct-16 Nonstorm Dicamba nd 0.05 0.017 GRY030 Receiving Water 14-Oct-16 Storm Dicamba trace 0.05 0.017 MCC040 Receiving Water 14-Oct-16

supproting information, study 299, fy16-17 for the supporting information, study 299, fy16-17...

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