SMITH t5: LEIWNEY, 2317 EAST JUHN STREET SEATTLE, 9131 12 {2mm Ben?2383, mm (20.6) Hem-4187 April 25, 2018 Via Certi?ed Mail Return Receipt Requested Managing Agent The Boeing Company 4071 PO. Box 3707 Seattle, WA 98124 Managing Agent Boeing Military Delivery Center 10002 E. Marginal Way S. Tukwila, WA 98108 Re: NOTICE OE TNTENT TO SUE ENRER THE CLEAN WATER ACT AND REQUEST FOR COPY OF STORMWATER POLLUTION PREVENTION PLAN Dear Managing Agent: We represent Puget Soundkeeper Alliance (?Soundkeeper?), 5305 Shilshole Ave. NW, Suite 150, Seattle, WA 98107, (206) 297?7002, and Waste Action Project P.O. Box 9281, Covington, WA 98042, (253) 63937245. Any reSponse or correspondence related to this matter should be directed to us at the letterhead address. This letter is to provide you with sixty days notice of our clients? intent to ?le a citizen suit against The Boeing Company (?Boeing?) under section 505 of the Clean Water Act 33 USC 1365, for the violations described below. This letter is also a request for a copy of the complete and current stormwater pollution prevention plan required by Boeing?s National Pollution Discharge Elimination System permit. For stormwater discharges from the Boeing Military Delivery Center formerly known as the Boeing Military Flight Center), located at or about 10002 East Marginal Way South, Tukwila, WA 98108, to the Duwamish River via municipal separate storm sewer systems, Boeing was granted coverage under the Washington Industrial Stormwater General Permit issued by the Washington Department of Ecology (?Ecology?) on October 21, 2009, effective January 1, 2010, modified May 16, 2012, effective July 1, 2012, and set to expire on January 1, 2015, under National Pollutant Discharge Elimination System Permit No. (the ?2010 Permit?). Since January 2, 2015, these discharges have been authorized by the iteration of the Washington Industrial Stormwater General Permit issued December 3, 2014, effective January 2, 2015, and expiring on December 31, 2019 (the ?2015 Permit?), under the same permit identi?cation number. Notice of intent to Sue .. 1 Ecology has issued at least two administrative orders concerning the conditions of the 2010 Permit and the 2015 Permit (collectively, ?the Permits?) for the BMDC. Administrative Order Docket No. 10554 was issued to Boeing on April 3, 2014, and remains in effect. Administrative Order Docket No. 13932 was issued to Boeing on March 23, 2017. Boeing has violated and continues to violate the CWA (see Sections 301 and 402 of the CWA, 33 USC 1311 and 1342) and the terms and conditions of (1) the Permits, and (2) Order No. 13932 as described below. I. COMPLIANCE WITH STANDARDS. A. Violations of Water Quality Standards. Condition S10.A of the Permits prohibits discharges that cause or contribute to violations of water quality standards. Water quality standards are the foundation of the CWA and Washington?s efforts to protect clean water. In particular, water quality standards represent the US. Environmental Protection Agency and Ecology?s determination, based on scientific studies, of the thresholds at which pollution starts to cause signi?cant adverse effects on fish or other beneficial uses. For each water body in Washington, Ecology designates the ?bene?cial uses? that must be protected through the adoption of water quality standards. A discharger must comply with both narrative and numeric criteria water quality standards. WAC l73~201A~010; WAC l73-201A?5 1 0 (?No waste discharge permit can be issued that causes or contributes to a violation of water quality criteria, except as provided for in this Narrative water quality standards provide legal mandates that supplement the numeric criteria. Furthermore, the narrative water quality standard applies with equal force even if Ecology has established a numeric water quality standard. Specifically, Condition 810A of the Permits require that Boeing?s discharges not cause or contribute to an excursion of Washington State water quality standards. Boeing discharges to the Duwamish River via the BMDC stormwater system and the municipal separate storm sewer systems through which it ?ows. Boeing discharges storinwater that contains elevated levels of PCBs as indicated by Boeing?s stormwater monitoring results included in TABLE 1: Date of Sampling Point Total PCB Concentration (ug/L) sample/discharge 7/23/14 1.1M 0.35 1/23/15 OWSZ 0.037 1/23/15 3.1M 0.07 1/23/15 4.1C 0.014 1/21/16 3.1M 0.251 7/22/16 3.1M 0.134 10/4/16 OWS2 0.017 10/4/16 4.1C 0.014 Notice of Intent to Sue - 2 1/18/17 OWS2 0.025 1/18/17 3.1M 0.096 4/5/17 OWSZ 0.025 4/5/17 3.1M 0.015 9/29/17 3.1M 0.034 10/12/17 3.1M 0.032 10/12/17 4.1C 0.022 1/11/18 3.1M 0.125 These elevated concentrations of total PCBs are certain to cause violations of human health criteria for total PCBs in the water column (0.000007 ug/L) in the vicinity of the outfall (Norfolk Street outfall to the Duwamish River) and of sediment quality standards for total PCBs applicable in the Lower Duwamish Waterway Superfund Site. See WAC 173 240(5) and WAC 173-204- Part The Duwamish River water column and sediments are already heavily contaminated with total PCBs to the extent that discharges at any detectable amounts are likely to cause or contribute to violations of relevant water quality standards, both the numeric standards reference above and the narrative water quality criteria for toxics, WAC 1 because they have the potential to cumulatively (or singularly) to affect characteristic water uses (including ?sh and shellfish harvest), cause acute or chronic toxicity to the most sensitive biota depending on the Duwarnish River, and adversely affect public health. These violations are ongoing and recur with each stormwater discharge from the BMDC. The BMDC stormwater discharges to the Duwarnish River containing elevated levels of zinc and cepper as indicated in the monitoring results in TABLE 2: Date or period of Monitoring Pollutant Sampie concentration (or sample Point average) exceeding benchmark 3rd Quarter 2014 Zinc 145.94 ug/L 3rd Quarter 2014 MFG-3.1M Zinc 217.17 ug/L Quarter 2015 .IM Copper 30.53 ug/L Quarter 2015 Zinc 761.66 ug/L 4th Quarter 2015 Zine 120 ug/L 3rd Quarter 2016 MFC-1.1M Copper 34.70 ug/L 3rd Quarter 2016 MFCFIJM Zinc 650 ug/L 4th Quarter 2016 MRC-1.1M Zinc 238 ug/L 4th Quarter 2016 Zinc 581 ug/L 3rd Quarter 2017 Zinc 252 ug/L 3rd. Quarter 2017 MFC-3.1M Copper 37.1 ug/L 3rd Quarter 2017 Zinc 206 ug/L 4th Quarter 2017 Copper 21.1 ug/L These elevated concentrations of zinc and copper are likely to cause or contribute to violations of the narrative water quality criteria for toxics, WAC 240(1), because they have the potential to cumulatively (or singularly) to affect characteristic Notice of Intent to Sue - 3 water uses (including ?sh and shell?sh harvest), cause acute or chronic toxicity to the most sensitive biota depending on the Duwarnish River, and adversely affect public health. They are also likely to cause or contribute to violations of aquatic life criteria for cepper and zinc in the Duwamish River water column and sediments. WAC WAC 173-204 Part Ill. These violations are ongoing and recur with each stonnwater discharge from the BMDC. - The BMDC discharges stormwater causing these violations every time there is more than a trace amount of precipitation at the BMDC. Attachment A contains precipitation data identifying dates of such precipitation and discharge over the past ?ve years. B. Compliance with. Standards. Condition 810.0 of the Permits requires Boeing to apply all known and reasonable methods of prevention, control and treatment to all discharges, including preparation and implementation of an adequate and best management practices Boeing has violated and continues to violate these conditions by failing to apply AKART to its discharges or to implement an adequate and BMPs as evidenced by the elevated levels of pollutants in its discharge indicated in the table above and as described below in this notice of intent to sue. H. STORMWATER POLLUTION PREVENTEON PLAN VIOLATIONS. Condition of the Permits requires Boeing to develop and. implement a as Speci?ed. Condition of the Permits requires the to Specify BMPs necessary to provide AKART and ensure that discharges do not cause or contribute to violations of water quality standards. On information and belief, Boeing has violated these requirements of the Permits each and every day during the last five years and continues to violate them as it has failed to prepare and/or implement a that includes AKART BMPs and BMPs necessary to comply with state water quality standards. Condition S3.A of the Permits requires Boeing to have and implement a that is consistent with permit requirements, fully implemented as directed by permit conditions, and updated as necessary to maintain compliance with permit conditions. On information and belief, Boeing has violated these requirements of the Permits each and every day during the last ?ve years and continues to violate them because its is not consistent with permit requirements, has not been fully implemented and has not been updated as necessary. As noted by Order No. 13932, dated March 23, 2017, elevated pollutant levels in stormwater discharged from BMDC and in storm drain solids at the site ?strongly indicate that the source control at is inadequate and may lead to the release of polluting matters into waters of the state.? The fails to satisfy the requirements of Condition S3 of the Permits because it does not adequately describe BMPs. Condition S3.A.3 of the Permits requires that the include BMPs consistent with approved storrnwater technical manuals or document Notice of Intent to Sue - 4 how stormwater BMPs included in the are demonstratively equivalent to the practices contained in the approved stormwater technical manuals, including the proper selection, implementation, and maintenance of all applicable and appropriate BMPs. Boeing?s does not comply with these requirements because it does not adequately describe BMPs and does not include BMPs consistent with approved storlnwater technical manuals nor does it include BMPS that are demonstratively equivalent to such BMPs with documentation of BMP adequacy. Boeing?s fails to satisfy the requirements of Condition 53.132 of the Permits because it fails to include a facility assessment as mandated. The fails to include an adequate facility assessment because it does not describe the industrial activities conducted at the site, the general layout of the facility including buildings and storage of raw materials, the flow of goods and materials through the facility, regular business hours and seasonal variations in business hours or in industrial activities as required. Boeing?s fails to satisfy the requirements of Condition S3.B.1 of the Permits because it does not include a site map that identifies signi?cant features, the stormwater drainage and discharge structures, the stormwater drainage areas for each stonnwater discharge point offasite, a unique identifying number for each discharge point, each sampling location with a unique identifying number, paved areas and buildings, areas of pollutant contact associated with Specific industrial activities, conditionally approved non?stormwater discharges, surface water locations, areas of existing and potential soil erosion, vehicle maintenance areas, and lands and waters adjacent to the site that may be helpful in identifying discharge points or drainage routes. Boeing?s fails to comply with Condition of the Permits because it does not include an inventory of industrial activities that identi?es all areas associated with industrial activities that have been or may potentially be sources of pollutants as required. The does not identify all areas associated with loading and unloading of dry bulk materials or liquids, outdoor storage of materials or products, outdoor manufacturing and processing, onsite dust or particulate generating processes, on?site waste treatment, storage, or diSposal, vehicle and equipment fueling, maintenance, and/or cleaning, roofs or other surfaces exposed to air emissions from a manufacturing building or a process area, and roofs or other surfaces composed of materials that may be mobilized by stormwater as required by these conditions. Boeing?s does not comply with Condition of the Permits because it does not include an adequate inventory of materials. The does not include an inventory of materials that lists the types of materials handled at the site that potentially may be exposed to precipitation or runoff and that could result in stormwater pollution, a short narrative for material describing the potential for the pollutants to be present in stormwater discharge that is updated when data becomes available to verify the presence or absence of the pollutants, a narrative description of any potential sources of pollutants from past activities, materials and spills that were previously handled, treated, stored, or diSposed of in a manner to allow ongoing exposure to stormwater as required. The does not include the Notice of Intent to Sue 5 method and location of on?site storage or disposal of such materials and a list of signi?cant spills and signi?cant leaks of. toxic or hazardous pollutants as these permit conditions require. Boeing?s does not comply with Condition S3.B.3 of the Permits because it does not identify Specific individuals by name or title whose responsibilities include development, implementation, maintenance and modi?cation. Boeing?s does not comply with Condition S3.B.4.b.i of the Permits because it does not include required operational source control BMPS in the following categories: good housekeeping (including de?nition of ongoing maintenance and cleanup of areas that may contribute pollutants to stormwater discharges, and a schedule/ frequency for each housekeeping task); preventive maintenance (including BMPs to inspect and maintain stormwater drainage, source controls, treatment systems, and plant equipment and systems, and the schedule/frequency for each task); spill prevention and emergency cleanup plan (including BMPs to prevent spills that can contaminate stormwater, for material handling procedures, storage requirements, cleanup equipment and procedures, and spill logs); employee training (including an overview of what is in the how employees make a difference in complying with the spill response procedures, good housekeeping, maintenance requirements, and material management practices, how training will be conducted, the frequency/schedule of training, and a log of the dates on which speci?c employees received training); inspections and recordkeeping (including documentation of procedures to ensure compliance with permit requirements for inspections and recordkeeping, including identi?cation of personnel who conduct inspections, provision of a tracking or follow?up procedure to ensure that a report is prepared and appropriate action taken in response to visual monitoring, de?nition of how Boeing will comply with signature and record retention requirements, and certi?cation of compliance with the and Permit). Boeing?s does not comply with Condition S3.B.4.b.i.?7 of the Permits because it does not include measures to identify and eliminate the discharge of process wastewater, domestic wastewater, noncontact cooling water, and other illicit discharges to stormwater sewers, or to surface waters and ground waters of the state. Boeing?s does not comply with Condition S3.B.4.b.ii of the Permits because it does not include required structural source control BMPs to minimize the exposure of manufacturing, processing, and material storage areas to rain, snow, snowmelt, and runoff Boeing does not comply with Condition S3. B. 4. b. of the Permits because it does not include treatment BMPs as required Boeing?s fails to comply with Condition $3.B.4.b.v of the Permits because it does not include BMPs to prevent the erosion of soils or other earthen materials and prevent offssite sedimentation and violations of water quality standards. Boeing?s fails to satisfy the requirements of Condition 83.8.5 of the Permits because it fails to include a storinwater sampling plan as required. The does not include a sampling plan that identi?es points of discharge to surface waters, storm sewers, or discrete ground water in?ltration locations, documents Why each discharge point is not Notice of Intent to Sue 6 sampled, identi?es each sampling point by its unique identifying number, identi?es staff responsible for conducting stormwater sampling, speci?es procedures for sampling collection and handling, Speci?es procedures for sending samples to the a laboratory, identi?es parameters for analysis, holding times and preservatives, laboratory quantization levels, and analytical methods, and that speci?es the procedure for submitting the results to Ecology. MONITORING AND REPORTING VIOLATIONS. A. Failure to Collect Quarterly Samples. Condition 84B of the Permits require Boeing to collect a sample of its stormwater discharge once during every calendar quarter. Conditions and of the Permits require Boeing to collect stormwater samples at each distinct point of discharge offsite except for substantially identical outfalls, in which case only one of the substantially identical outfalls must be sampled. These conditions set forth sample collection criteria, but require the collection of a sample even if the criteria cannot be met. Boeing violated these requirements by failing to collect storinwater samples at any of its discharge points during the second quarters of both 2015 and 2016; at sample point OWSZ (Drainage Area 2) in the third and fourth quarters of 2017, in the third quarter of 2016; and at sample point (Drainage Area 4) in the third quarter of 2017. B. Failure to Collect Stormwater Sampies from Each Distinct Point of Discharge. Boeing has also violated. and continues to violate these conditions because it does not sample each distinct point of discharge off-site. In particular, it fails to monitor discharge ?om Area I (the western portion of the BMDC, including stalls 69, 71, 73, 75, and 77), and areas of sheet ?ow off its facility. These violations have occurred and continue to occur each and every quarter during the last ?ve years that Boeing was and is required to sample its stormwater discharges, including the quarters in which it collected stormwater discharge samples from some, but not each, point of discharge. These violations will continue until Boeing commences monitoring all distinct points of discharge. IV. CORRECTIVE ACTION VIOLATIONS. A. Violations of the Level One Requirements. Condition 88B of the Permits requires Boeing take speci?ed actions, called a ?Level One Corrective Action,? each time quarterly stormwater sample results exceed a benchmark value or are outside the benchmark range for pH. As described by Condition 88B of the Permits, a Level One Corrective Action requires Boeing: (1) review the for the facility and ensure that it fully complies with Condition 83 of the Permits and contains the correct BMPs from the applicable Stonnwater Management Manual; (2) make appropriate revisions to the to include additional Notice of Intent to Sue 7 Operational source control BMPs with the goal of achieving the applicable benchmark values in future discharges and sign and certify the revised in accordance with Condition S3.A.6 of the Permits; and (3) summarize the Level One Corrective Action in the Annual Report required under Condition 89.8 of the Permits. Condition 88.8.4 of the Permits requires Boeing implement the revised as soon as possible, and no later than the DMR due date for the quarter the benchmark was exceeded. Condition SSA and Table 2 of the Permits establish the following benchmarks: turbidity 25 pH 5 9 total copper l4 gig/L; and total zinc 117 ug/L. Boeing has violated the requirements of the Permits described above by failing to conduct a Level One Corrective Action in accordance with permit conditions, including the required review, revision and certi?cation of the the required implementation of additional BMPS, and the required summarization in the annual report each time in the past five years that its quarterly stormwater sampling results were greater than a benchmark or outside the benchmark range for pH, including the benchmark excursions listed in TABLE 2 above. B. Violations of the Level Two Requirements of the 2010 Permit. Condition 88C of the Permits requires Boeing take speci?ed actions, called. a ?Level Two Corrective Action,? each time quarterly stormwater sample results exceed an applicable benchmark value or are outside the benchmark range for pH for any two quarters during a calendar year. As described by Condition 88C of the Permits, a Level Two Corrective Action requires Boeing: (1) review the for the facility and ensure that it fully complies with Condition S3 of the Permits; (2) make appropriate revisions to the to include additional structural source control BMPs with the goal of achieving the applicable benchmark value(s) in future discharges and sign and certify the revised in accordance with Condition 83.A.6 of the Permits; and (3) summarize the Level Two Corrective Action (planned or taken) in the Annual Report required under Condition 89B of the Permits. Condition SS.C.4 of the Permits requires Boeing implement the revised according to condition 83 and the applicable stormwater management manual as soon as possible, and no later than August 31 st of the following year. Condition SSA and Table 2 of the Permits establish the following benchmarks: turbidity 25 pH 5 9 total copper l4 ug/L; and total zinc 117 pig/L. Boeing has violated the requirements of the Permits described above by failing to conduct a Level Two Corrective Action in accordance with permit conditions, including the required review, revision and certi?cation of the the required implementation of additional BMPs, including additional structural source control BMPs, and the required summarization in the annual report each time since January 1, 2013, its quarterly stormwater sampling results were greater than a benchmark or outside the benchmark range for pH for any two quarters during a calendar year. As indicated in TABLE 2, these violations include, Notice of Intent to Sue 8 but are not limited to, Boeing?s failure to ful?ll these obligations for zinc triggered by its stormwater sampling during calendar years 2015 and 2016. V. VIOLATION OF NUMERIC EFFLUENT LIMITATION. Condition 86.C of the 2015 Permit imposes a maximum daily ef?uent limitation for total suspended solids concentration of 30 mg/L on discharges from the BMDC, effective January 1, 2017. Boeing violated this ef?uent limitation by discharging stormwater with a TSS concentration of 62.6 rug/L on January 18, 2017. VI. VIOLATION OF ADMINISTRATIVE ORDER DOCKET NO. 13932. Ecology issued Administrative Order Docket No. 13932 to Boeing on March 23, 2017. Order No. 13932, issued to ensure Boeing?s compliance with the 2015 Permit and Washington State water pollution control laws, imposes requirements on Boeing with regard to BMDC stormwater discharges. Order No. 13932 has three requirements: (1) by June 15, 2017, Boeing was to submit an engineering report for Ecology?s review and approval for treatment of stormwater discharges from the BMDC, including specified requirements such as a brief summary of the treatment alternatives considered and why the preposed option was selected, the basic design data and sizing calculations of the treatment units, a description of the treatment process and Operation, including a ?ow diagram, results to be expected from the treatment process including the predicted stormwater discharge characteristics, and a statement, expressing sound engineering justification through the use of pilot plant data, results from similar installations, and/or scientific evidence that the proposed treatment is reasonably expected to meet the permit benchmarks; (2) the engineering report must incorporate necessary operational and structural source control BMPs for Level and 2 corrective actions; and (3) installation and operation of all final stormwater treatment systems approved by Ecology no later than October 3 2017. Boeing is in violation of Order No. 13932. First, Boeing failed to submit to Ecology, by June 17, 2017, or subsequently, an engineering report satisfying the requirements of the order. The revised engineering report submitted by Boeing, dated March 22, 2018, does not summarize treatment alternatives considered and explain Why the proposed treatment option was selected, does not include basic treatment unit design and sizing calculations, does not include a description of the treatment process and operation, including a ?ow diagram, does not describe results to be expected from the treatment process including the predicted stormwater discharge characteristics, and does not include a statement, expressing sound engineering justification through the use of pilot plant data, results from similar installations, and/or scienti?c evidence that the proposed treatment is reasonably expected to meet the permit benchmarks. Further, the revised engineering report does not propose treatment for the entire BMDC as contemplated by the order. Attachment to this notice of intent to sue is Ecology?s August 25, 2017, letter declining to approve the engineering report as initially submitted by Boeing on July 7, 2017, including Speci?c bases for its disapproval and failure to satisfy the requirements of Order No. 13932, which are incorporated herein by reference. The engineering report deficiencies identi?ed in Attachment have not been remedied in Boeing?s March 22, 2018, revision, or subsequently. Second, the revised engineering report Notice of Intent to Sue 9 does not incorporate necessary operational and structural source control BMPs for Level 1 and 2 corrective actions for cOpper and zinc. Third, Boeing has failed to install and have Operational all ?nal stormwater treatment systems approved by Ecology by October 31, 2017, or to date. VII. REQUEST FOR Pursuant to Condition SQF of the 2015 Permit, Client hereby requests that Boeing Company, Inc. provide a copy of, or access to, its complete with all incorporated plans, monitoring reports, checklists, and training and inspection logs. The copy of the and any other communications about this request should be directed to the undersigned at the letterhead address. Should Boeing fail to provide the requested complete copy of, or access to, its as required by Condition S9.F of the 2015 Permit, it will be in violation of that condition, which violation shall also be subject to this notice of intent to sue and any ensuing lawsuit. CONCLUSION. The above?described violations re?ect those indicated by the information currently available to our clients. These violations are ongoing. Our clients intend to sue for all violations, including those yet to be uncovered and those committed after the date of this Notice of Intent to Sue. Under Section 309(d) ofthe CWA, 33 USC 1319(d), each ofthe above~described violations subjects the violator to a penalty of up to $32,500 per day for each violation before and through January 12, 2009 and up to $37,500 per day for each violation thereafter. In addition to civil-penalties, Client will seek injunctive relief to prevent further violations under Sections 505(a) and of the CWA, 33 USC 1365(a) and and such other relief as is permitted by law. Also, Section 505(d) of the CWA, 33 USC 1365(d), permits prevailing parties to recover costs, including attorney?s fees. Our clients believe that this NOTICE OF INTENT TO SUE suf?ciently states grounds for ?ling suit. We intend, at the close of the 60?day notice period, or shortly thereafter, to file a citizen suit against Boeing Company, Inc. under Section 505(a) of the Clean Water Act for violations. During the 60~day notice period, we would be willing to discuss effective remedies for the violations addressed in this letter and settlement terms. If you wish to pursue such discussions in the absence of litigation, we suggest that you. initiate those discussions within 10 days of receiving this notice so that a meeting can be arranged and so that negotiations may be completed We do not intend to delay the ?ling of a complaint if discussions are continuing when the notice period ends. Notice of Intent to Sue - 10 Very truly yours, 5M1TH LUWNEY, PLLB EVVC 1.534%; cc: Scott Pruitt, Administrator, U.S. EPA @333 32/213,; ?1'42 mx/? Chris Hladick, Region 10 Administrator, U.S. EPA ((91 Maia Bellon, Director, Washington Department of Ecology CORPORATION SERVICE COMPANY (Registered Agent) 300 DESCHUTES WAY SW STE 304, TUMWATER, WA 98501 Notice of Intent to Sue 1 1 DATE 4/1/2013 4/2/2013 4/3/2013 4/4/2013 4/5/2013 4/6/2013 4/7/2013 4/8/2013 4/9/2013 4/10/2013 4/11/2013 4/12/2013 4/13/2013 4/14/2013 4/15/2013 4/16/2013 4/17/2013 4/18/2013 4/19/2013 4/20/2013 4/21/2013 4/22/2013 4/23/2013 4/24/2013 4/25/2013 4/26/2013 4/27/2013 4/28/2013 4/29/2013 4/30/2013 5/1/2013 5/2/2013 5/3/2013 5/4/2013 5/5/2013 5/6/2013 5/7/2013 5/8/2013 5/9/2013 PROP 0 0 0 0.42 0.5 0.37 0.96 0.04 0.23 0.13 0.18 0.35 0.02 0.07 0.2 0.65 0.01 .0 . c: HOGCDOOQCJS [3 we DO ATTACHMENT A Precipitation Data 1 5/10/2013 5/11/2013 5/12/2013 5/13/2013 5/14/2013 5/15/2013 5/16/2013 5/17/2013 5/18/2013 5/19/2013 5/20/2013 5/21/2013 5/22/2013 5/23/2013 5/24/2013 5/25/2013 5/26/2013 5/27/2013 5/28/2013 5/29/2013 5/30/2013 5/31/2013 6/1/2013 6/2/2013 6/3/2013 6/4/2013 6/5/2013 6/6/2013 6/7/2013 6/8/2013 6/9/2013 6/10/2013 6/11/2013 6/12/2013 6/13/2013 6/14/2013 6/15/2013 6/16/2013 6/17/2013 6/18/2013 Precipitation Data for Boeing Field/King County Airport, WA, Station No. USW00024234 0.08 0.12 0.03 0.02 0.43 0.21 0.08 0.02 0.08 93.0 +409 6/19/2013 6/20/2013 6/21/2013 6/22/2013 6/23/2013 6/24/2013 6/25/2013 6/26/2013 6/27/2013 6/28/2013 6/29/2013 6/30/2013 7/1/2013 7/2/2013 7/3/2013 7/4/2013 7/5/2013 7/6/2013 7/7/2013 7/8/2013 7/9/2013 7/10/2013 7/11/2013 7/12/2013 7/13/2013 7/14/2013 7/15/2013 7/16/2013 7/17/2013 7/18/2013 7/19/2013 7/20/2013 7/21/2013 7/22/2013 7/23/2013 7/24/2013 7/25/2013 7/26/2013 7/27/2013 7/28/2013 (:20 {?8153 7/29/2013 7/30/2013 7/31/2013 8/1/2013 8/2/2013 8/3/2013 8/4/2013 8/5/2013 8/6/2013 8/7/2013 8/8/2013 8/9/2013 8/10/2013 8/11/2013 8/12/2013 8/13/2013 8/14/2013 8/15/2013 8/16/2013 8/17/2013 8/18/2013 8/19/2013 8/20/2013 8/21/2013 8/22/2013 8/23/2013 8/24/2013 8/25/2013 8/26/2013 8/27/2013 8/28/2013 8/29/2013 8/30/2013 8/31/2013 9/1/2013 9/2/2013 9/3/2013 9/4/2013 9/5/2013 9/6/2013 9/7/2013 9/8/2013 9/9/2013 0.46 0.12 0.87 0.68 0.01 0 ATTACHMENT A Precipitation Data 2 9/10/2013 9/11/2013 9/12/2013 9/13/2013 9/14/2013 9/15/2013 9/16/2013 9/17/2013 9/18/2013 9/19/2013 9/20/2013 9/21/2013 9/22/2013 9/23/2013 9/24/2013 9/25/2013 9/26/2013 9/27/2013 9/28/2013 9/29/2013 9/30/2013 10/1/2013 10/2/2013 10/3/2013 10/4/2013 10/5/2013 10/6/2013 10/7/2013 10/8/2013 10/9/2013 10/10/2013 10/11/2013 10/12/2013 10/13/2013 10/14/2013 10/15/2013 10/16/2013 10/17/2013 10/18/2013 10/19/2013 10/20/2013 10/21/2013 10/22/2013 10/23/2013 10/24/2013 10/25/2013 10/26/2013 10/27/2013 10/28/2013 10/29/2013 10/30/2013 10/31/2013 11/1/2013 11/2/2013 11/3/2013 11/4/2013 11/5/2013 11/6/2013 11/7/2013 11/8/2013 11/9/2013 11/10/2013 11/11/2013 1.1/12/2013 11/13/2013 11/14/2013 11/15/2013 11/16/2013 11/17/2013 11/18/2013 11/19/2013 11/20/2013 11/21/2013 11/22/2013 11/23/2013 11/24/2013 11/25/2013 11/26/2013 11/27/2013 11/28/2013 11/29/2013 11/30/2013 12/1/2013 12/2/2013 12/3/2013 12/4/2013 0.01 0.01. 0.01 0.06 0.01 0.01 0.03 0.35 0.02 0.01 0.05 0.09 0.94 0.09 0.14 0.01 0.08 0.05 0.8 0.11 0.08 @0000 0.06 0.03 0.11 0.01 12/5/2013 12/6/2013 12/7/2013 12/8/2013 12/9/2013 12/10/2013 12/11/2013 12/12/2013 12/13/2013 12/14/2013 12/15/2013 12/16/2013 12/17/2013 12/18/2013 12/19/2013 12/20/2013 12/21/2013 12/22/2013 12/23/2013 12/24/2013 12/25/2013 12/26/2013 12/27/2013 12/28/2013 12/29/2013 12/30/2013 12/31/2013 1/1/2014 1/2/2014 1/3/2014 1/4/2014 1/5/2014 1/6/2014 1/7/2014 1/8/2014 1/9/2014 1/10/2014 1/11/2014 1/12/2014 1/13/2014 1/14/2014 1/15/2014 1/16/2014 ATTACHMENT A - Precipitation Data 3 1/17/2014 1/18/2014 1/19/2014 1/20/2014 1/21/2014 1/22/2014 1/23/2014 1/24/2014 1/25/2014 1/26/2014 1/27/2014 1/28/2014 1/29/2014 1/30/2014 1/81/2014 2/1/2014 2/2/2014 2/3/2014 2/4/2014 2/5/2014 2/6/2014 2/7/2014 2/8/2014 2/9/2014 2/10/2014 2/11/2014 2/12/2014 2/13/2014 2/14/2014 2/15/2014 2/16/2014 2/17/2014 2/18/2014 2/19/2014 2/20/2014 2/21/2014 2/22/2014 2/23/2014 2/24/2014 2/25/2014 2/26/2014 2/27/2014 2/28/2014 0 0 0 3/1/2014 3/2/2014 3/3/2014 3/4/2014 3/5/2014 3/6/2014 3/7/2014 3/8/2014 3/9/2014 3/10/2014 3/11/2014 3/12/2014 3/13/2014 3/14/2014 3/15/2014 3/16/2014 3/17/2014 3/18/2014 3/19/2014 3/20/2014 3/21/2014 3/22/2014 3/23/2014 3/24/2014 3/25/2014 3/26/2014 3/27/2014 3/28/2014 3/29/2014 3/30/2014 3/31/2014 4/1/2014 4/2/2014 4/3/2014 4/4/2014 4/5/2014 4/6/2014 4/7/2014 4/8/2014 4/9/2014 4/10/2014 4/11/2014 4/12/2014 0.01 0.7 0.37 0.42 1.44 0.2 1.12 0.26 0.42 0.11 0.21 1.08 0.01 0.01 0.22 0.06 0.03 0.51 0.63 0.02 0.12 0.08 0.38 0660 4/18/2014 4/14/2014 4/15/2014 4/16/2014 4/17/2014 4/18/2014 4/19/2014 4/20/2014 4/21/2014 4/22/2014 4/28/2014 4/24/2014 4/25/2014 4/26/2014 4/27/2014 4/28/2014 4/29/2014 4/30/2014 5/1/2014 5/2/2014 5/3/2014 5/4/2014 5/5/2014 5/6/2014 5/7/2014 5/8/2014 5/9/2014 5/10/2014 5/11/2014 5/12/2014 5/18/2014 5/14/2014 5/15/2014 5/16/2014 5/17/2014 5/18/2014 5/19/2014 5/20/2014 5/21/2014 5/22/2014 5/28/2014 5/24/2014 5/25/2014 0.04 019 0 0.28 ATTACHMENT A Precipitation Data 4 5/26/2014 5/27/2014 5/28/2014 5/29/2014 5/30/2014 5/31/2014 6/1/2014 6/2/2014 6/3/2014 6/4/2014 6/5/2014 6/6/2014 6/7/2014 6/8/2014 6/9/2014 6/10/2014 6/11/2014 6/12/2014 6/18/2014 6/14/2014 6/15/2014 6/16/2014 6/17/2014 6/18/2014 6/19/2014 6/20/2014 6/21/2014 6/22/2014 (3/23/2014 6/24/2014 6/25/2014 6/26/2014 6/27/2014 6/28/2014 6/29/2014 6/80/2014 7/1/2014 7/2/2014 7/8/2014 7/4/2014 7/5/2014 7/6/2014 7/7/2014 0 0.08 000000000000000 0.05 0 0.1 0.09 0.05 0 0000000000000000000 7/8/2014 7/9/2014 7/10/2014 7/11/2014 7/12/2014 7/13/2014 7/14/2014 7/15/2014 7/16/2014 7/17/2014 7/18/2014 7/19/2014 7/20/2014 7/21/2014 7/22/2014 7/28/2014 7/25/2014 7/26/2014 7/27/2014 ?17/28/2014- "3/29/2014 7/30/2014 7/31/2014 8/1/2014 8/2/2014 8/8/2014 8/4/2014 8/5/2014 8/6/2014 8/7/2014 8/8/2014 8/9/2014 8/10/2014 8/11/2014 8/12/2014 8/14/2014 8/15/2014 8/16/2014 8/17/2014 8/18/2014 8/19/2014 8/20/2014 8/21/2014 0.21 0000000 8/22/2014 8/23/2014 8/24/2014 8/25/2014 8/26/2014 8/27/2014 8/28/2014 8/29/2014 8/30/2014 8/31/2014 9/1/2014 9/2/2014 9/3/2014 9/4/2014 9/5/2014 9/6/2014 9/7/2014 9/8/2014 9/9/2014 9/10/2014 9/11/2014 9/12/2014 9/13/2014 9/14/2014 9/15/2014 9/16/2014 9/17/2014 9/18/2014 9/19/2014 9/20/2014 9/21/2014 9/22/2014 9/23/2014 9/24/2014 9/25/2014 9/26/2014 9/27/2014 9/28/2014 9/29/2014 9/30/2014 10/1/2014. 10/2/2014 10/3/2014 ATTACHMENT A Precipitation Data 5 10/4/2014 10/5/2014 10/6/2014 10/7/2014 10/8/2014 10/9/2014 10/10/2014 10/11/2014 10/12/2014 10/13/2014 10/14/2014 10/15/2014 10/16/2014 10/17/2014 10/18/2014 10/19/2014 10/20/2014 10/21/2014 10/22/2014 10/23/2014 10/24/2014 10/25/2014 10/26/2014 10/27/2014 10/28/2014 10/29/2014 10/30/2014 10/31/2014 11/1/2014 11/2/2014 11/3/2014 11/4/2014 11/5/2014 11/6/2014 11/7/2014 11/8/2014 11/9/2014 11/10/2014 11/11/2014 11/12/2014 11/13/2014 11/14/2014 11/15/2014 eve: 4&9?4 ?4403 0.14 0.32 0.44 0.1 1.47 0.33 0.2 - 0.37 0.06 0.02 0.44 0.02 0.75 0.7 0.12 0.24 0.07 0.27 0.22 0.29 11/16/2014 11/17/2014 11/18/2014 11/19/2014 11/20/2014 11/21/2014 11/22/2014 11/23/2014 11/24/2014 11/25/2014 11/26/2014 11/27/2014 11/28/2014 11/29/2014 11/30/2014 12/1/2014 12/2/2014 12/3/2014 12/4/2014 12/5/2014 12/6/2014 12/7/2014 12/8/2014 1.2/9/2014 12/10/2014 12/11/2014 12/12/2014 12/13/2014 12/14/2014 12/15/2014 12/16/2014 12/17/2014 12/18/2014 12/19/2014 12/20/2014 12/21/2014 12/22/2014 12/23/2014 12/24/2014 12/25/2014 12/26/2014 12/27/2014 12/28/2014 0.14 0.66 0.66 0.12 0.12 0.06 12/29/2014 12/30/2014 12/31/2014 1/1/2015 1/2/2015 1/3/2015 1/4/2015 1/5/2015 1/6/2015 1/7/2015 1/8/2015 1/9/2015 1/10/2015 1/11/2015 1/12/2015 1/13/2015 1/14/2015 1/15/2015 1/16/2015 1/17/2015 1/18/2015 1/19/2015 1/20/2015 1/21/2015 1/22/2015 1/23/2015 1/24/2015 1/25/2015 1/26/2015 1/27/2015 1/28/2015 1/29/2015 1/30/2015 1/31/2015 2/1/2015 2/2/2015 2/3/2015 2/4/2015 2/5/2015 2/6/2015 2/7/2015 2/8/2015 2/9/2015 0.04 0.3 0.03 0.32 0.9 0.75 0.82 0.15 0.15 ATTACHMENT A Precipitation Data - 6 2/10/2015 2/11/2015 2/12/2015 2/13/2015 2/14/2015 2/15/2015 2/16/2015 2/17/2015 2/18/2015 2/19/2015 2/20/2015 2/21/2015 2/22/2015 2/23/2015 2/24/2015 2/25/2015 2/26/2015 2/27/2015 2/28/2015 3/1/2015 3/2/2015 3/3/2015 3/4/2015 3/5/2015 3/6/2015 3/7/2015 3/8/2015 3/9/2015 3/10/2015 3/11/2015 3/12/2015 3/13/2015 8/14/2015 3/15/2015 3/16/2015 3/17/2015 3/18/2015 3/19/2015 3/20/2015 3/21/2015 3/22/2015 3/23/2015 3/24/2015 QQOOQCQQOO .0 CD 15 0.08 0 0.09 0.63 2.45 0 0.04 0 0.01 0.13 0.14 0.037 0.21 0.28 3/25/2015 3/26/2015 3/27/2015 3/28/2015 3/29/2015 3/30/2015 3/31/2015 4/1/2015 4/2/2015 4/3/2015 4/4/2015 4/5/2015 4/6/2015 4/7/2015 4/8/2015 4/9/2015 4/10/2015 4/11/2015 4/12/2015 4/13/2015 4/14/2015 4/15/2015 4/16/2015 4/17/2015 4/18/2015 4/19/2015 4/20/2015 4/21/2015 4/22/2015 4/23/2015 4/24/2015 4/25/2015 4/26/2015 4/27/2015 4/28/2015 4/29/2015 4/30/2015 5/1/2015 5/2/2015 5/3/2015 5/4/2015 5/5/2015 5/6/2015 OOQOCDCD 0.16 0.16 0.01 0.12 0.25 5/7/2015 5/8/2015 5/9/2015 5/10/2015 5/11/2015 5/12/2015 5/13/2015 5/14/2015 5/15/2015 5/16/2015 5/17/2015 5/18/2015 5/19/2015 5/20/2015 5/21/2015 5/22/2015 5/23/2015 5/24/2015 5/25/2015 5/26/2015 5/27/2015 5/28/2015 5/29/2015 5/30/2015 5/31/2015 6/1/2015 6/2/2015 6/3/2015 6/4/2015 6/5/2015 6/6/2015 6/7/2015 6/8/2015 6/9/2015 6/10/2015 6/11/2015 6/12/2015 6/13/2015 6/14/2015 6/15/2015 6/16/2015 6/17/2015 6/18/2015 00000 0.12 0.13 0.01 CD 0.0 ATTACHMENT A Precipitation Data - 7 6/19/2015 6/20/2015 6/21/2015 6/22/2015 6/23/2015 6/24/2015 6/25/2015 6/26/2015 6/27/2015 6/28/2015 6/29/2015 6/30/2015 7/1/2015 7/2/2015 7/8/2015 7/4/2015 7/5/2015 7/6/2015 7/7/2015 7/8/2015 7/9/2015 7/10/2015 7/11/2015 7/12/2015 7/13/2015 7/14/2015 7/15/2015 7/16/2015 7/17/2015 7/18/2015 7/19/2015 7/20/2015 7/21/2015 7/22/2015 7/28/2015 7/24/2015 7/25/2015 7/26/2015 7/27/2015 7/28/2015 7/29/2015 7/30/2015 7/31/2015 0.07 0630000000 0.01 0.13 0 0 0.02 0.01 0.1 0.01 0 0 0 0 8/1/2015 8/2/2015 8/3/2015 8/4/2015 8/5/2015 8/6/2015 8/7/2015 8/8/2015 8/9/2015 8/10/2015 8/11/2015 8/12/2015 8/13/2015 8/14/2015 8/15/2015 8/16/2015 8/17/2015 8/18/2015 8/19/2015 8/20/2015 8/21/2015 8/22/2015 8/23/2015 8/24/2015 8/25/2015 8/26/2015 8/27/2015 8/28/2015 8/29/2015 8/30/2015 8/31/2015 9/1/2015 9/2/2015 9/3/2015 9/4/2015 9/5/2015 9/6/2015 9/7/2015 9/8/2015 9/9/2015 9/10/2015 9/11/2015 9/12/2015 0.04 CD 0.82 53 c: 9/18/2015 9/14/2015 9/15/2015 9/16/2015 9/17/2015 9/18/2015 9/19/2015 9/20/2015 9/21/2015 9/22/2015 9/28/2015 9/24/2015 9/25/2015 9/26/2015 9/27/2015 9/28/2015 9/29/2015 9/80/2015 10/1/2015 10/2/2015 10/8/2015 10/4/2015 10/5/2015 10/6/2015 10/7/2015 10/8/2015 10/9/2015 10/10/2015 1.0/11/2015 10/12/2015 10/18/2015 10/14/2015 10/15/2015 10/16/2015 10/17/2015 10/18/2015 10/19/2015 10/20/2015 10/21/2015 10/22/2015 10/28/2015 10/24/2015 1.0/25/2015 0.03 0.05 0.57 0.01 0.09 0.01 0.35 ATTACHMENT A Precipitation Data 8 10/26/2015 10/27/2015 10/28/2015 10/29/2015 10/80/2015 10/81/2015 11/1/2015 11/2/2015 11/3/2015 11/4/2015 11/5/2015 11/6/2015 11/7/2015 11/8/2015 11/9/2015 11/10/2015 11/11/2015 11/12/2015 11/18/2015 1.1/14/2015 11/15/2015 11/16/2015 11/17/2015 11/18/2015 11/19/2015 11/20/2015 11/21/2015 11/22/2015 11/28/2015 11/24/2015 11/25/2015 11/26/2015 11/27/2015 11/28/2015 11/29/2015 11/30/2015 12/1/2015 12/2/2015 12/8/2015 12/4/2015 12/5/2015 12/6/2015 12/7/2015 0.09 0.01 0.1 0.02 0.56 0.88 0.47 0.07 0.07 0.01 0.01 0.49 0.88 0.16 0.07 0.04 0.24 1.81 1.66 0.78 0.09 0.74 0.05 0.08 0.12 0.21 0.01 0.89 0.07 0.51 0.12 0.81 0.55 1.07 12/8/2015 12/9/2015 12/10/2015 12/11/2015 12/12/2015 12/18/2015 12/14/2015 12/15/2015 12/16/2015 12/17/2015 12/18/2015 12/19/2015 12/20/2015 12/21/2015 12/22/2015 12/28/2015 12/24/2015 12/25/2015 12/26/2015 12/27/2015 12/28/2015 12/29/2015 12/80/2015 12/81/2015 1/1/2016 1/2/2016 1/3/2016 1/4/2016 1/5/2016 1/6/2016 1/7/2016 1/8/2016 1/9/2016 1/10/2016 1/11/2016 1/12/2016 1/18/2016 1/14/2016 1/15/2016 1/16/2016 1/17/2016 1/18/2016 1/19/2016 1/20/2016 1/21/2016 1/22/2016 1/28/2016 1/24/2016 1/25/2016 1/26/2016 1/27/2016 1/28/2016 1/29/2016 1/80/2016 1/81/2016 2/1/2016 2/2/2016 2/8/2016 2/4/2016 2/5/2016 2/6/2016 2/7/2016 2/8/2016 2/9/2016 2/10/2016 2/11/2016 2/12/2016 2/15/2016 2/16/2016 2/17/2016 2/18/2016 2/19/2016 2/20/2016 2/21/2016 2/22/2016 2/28/2016 2/24/2016 2/25/2016 2/26/2016 2/27/2016 2/28/2016 2/29/2016 8/1/2016 8/2/2016 8/8/2016 8/4/2016 0.15 0.08 0.69 0.11 0.71 0.27 0.08 0.21 ATTACHMENT A - Precipitation Data 9 8/5/2016 8/6/2016 8/7/2016 8/8/2016 8/9/2016 3/10/2016 8/11/2016 8/12/2016 8/18/2016 8/14/2016 8/15/2016 8/16/2016 8/17/2016 8/18/2016 8/19/2016 8/20/2016 8/21/2016 8/22/2016 8/28/2016 8/24/2016 8/25/2016 8/26/2016 {3/22/2016 8/28/2016 8/29/2016 8/80/2016 8/81/2016 4/1/2016 4/2/2016 4/8/2016 4/4/2016 4/5/2016 4/6/2016 4/7/2016 4/8/2016 4/9/2016 4/10/2016 4/11/2016 4/12/2016 4/18/2016 4/14/2016 4/15/2016 4/16/2016 4/17/2016 4/18/2016 4/19/2016 4/20/2016 4/21/2016 4/22/2016 4/28/2016 4/24/2016 4/25/2016 4/26/2016 4/27/2016 4/28/2016 4/29/2016 4/80/2016 5/1/2016 5/2/2016 5/8/2016 5/4/2016 5/5/2016 5/7/2016 5/8/2016 5/9/2016 5/10/2016 5/11/2016 5/12/2016 5/18/2016 5/14/2016 5/15/2016 5/16/2016 5/17/2016 5/18/2016 5/19/2016 5/20/2016 5/21/2016 5/22/2016 5/28/2016 5/24/2016 5/25/2016 5/26/2016 5/27/2016 5/28/2016 5/29/2016 5/80/2016 0.02 0.85 0.02 0.04 0900000 to. 0.0 0.2 CD 0.0 g2; 5/81/2016 6/1/2016 6/2/2016 6/8/2016 6/4/2016 6/5/2016 6/6/2016 6/7/2016 6/8/2016 6/9/2016 6/10/2016 6/11/2016 6/12/2016 6/18/2016 6/14/2016 6/15/2016 6/16/2016 6/17/2016 6/18/2016 6/19/2016 6/20/2016 6/21/2016 6/22/2016 6/23/2016 6/24/2016 6/25/2016 6/26/2016 6/27/2016 6/28/2016 6/29/2016 6/80/2016 7/1/2016 7/2/2016 7/3/2016 7/4/2016 7/5/2016 7/6/2016 7/7/2016 7/8/2016 7/9/2016 7/10/2016 7/12/2016 7/13/2016 000000000 0.07 0 0 0.05 0.84 0.04 0.56 0.07 .69 H00 0300 000000000000 .09 HO 00-3 0.02 0 0 0 ATTACHMENT A Precipitation Data 10 7/14/2016 7/15/2016 7/16/2016 7/17/2016 7/18/2016 7/19/2016 7/20/2016 7/21/2016 7/22/2016 7/28/2016 7/24/2016 7/25/2016 7/26/2016 7/27/2016 7/28/2016 7/29/2016 7/30/2016 7/81/2016 8/1/2016 8/2/20-16 8/8/2016 8/4/2016 8/5/2016 8/6/2016 8/7/2016 8/8/2016 8/9/2016 8/10/2016 8/11/2016 8/12/2016 8/18/2016 8/14/2016 8/15/2016 8/16/2016 8/17/2016 8/18/2016 8/19/2016 8/20/2016 8/21/2016 8/22/2016 8/28/2016 8/24/2016 8/25/2016 00000000 0.21 000000000000000 0.08 000000000000000000 8/26/2016 8/27/2016 8/28/2016 8/29/2016 8/30/2016 8/31/2016 9/1/2016 9/2/2016 9/3/2016 9/4/2016 9/5/2016 9/6/2016 9/7/2016 9/8/2016 9/9/2016 9/10/2016 9/11/2016 9/12/2016 9/18/2016 9/14/2016 9/15/2016 9/16/2016 9/17/2016 9/18/2016 9/19/2016 9/20/2016 9/21/2016 9/22/2016 9/28/2016 9/24/2016 9/25/2016 9/26/2016 9/27/2016 9/28/2016 9/29/2016 9/80/2016 10/1/2016 10/2/2016 10/8/2016 10/4/2016 10/5/2016 10/6/2016 10/7/2016 000000000000 0.0 10 000000000 0.09 0 0.01 0 01-400000000000 9.05:3 cup?tr?t 0.84 0.08 10/3/2016 10/9/2016 10/10/2016 10/11/2016 10/12/2016 10/13/2016 10/14/2016 10/16/2016 10/16/2016 10/17/2016 10/13/2016 10/19/2016 10/20/2016 10/21/2016 10/22/2016 10/23/2016 10/24/2016 10/25/2016 10/26/2016 10/27/2016 10/23/2016 10/29/2016 10/30/2016 10/31/2016 11/1/2016 11/2/2016 11/3/2016 11/4/2016 11/5/2016 11/6/2016 11/7/2016 11/3/2016 11/9/2016 11/10/2016 11/11/2016 11/12/2016 11/13/2016 11/14/2016 11/15/2016 11/16/2016 11/17/2016 11/13/2016 11/13/2016 0.65 0.21 0.01 1.74 1.49 0.68 0.52 0.04 0.1.2 0.18 1.17 0.01 0.04 0.11 0.13 0.02 1.46 0.07 0.01 0.17 0.23 0.75 0.26 0.48 0.94 0.21 0.05 0.19 0.09 0.25 0.24 1.02 0 0 0 0.1 ATTACHMENT A Precipitation Data - 11 11/20/2016 11/21/2016 11/22/2016 11/23/2016 11/24/2016 11/25/2016 11/26/2016 11/27/2016 11/28/2016 11/29/2016 11/30/2016 12/1/2016 12/2/2016 12/3/2016 12/4/2016 12/5/2016 12/6/2016 12/7/2016 12/8/2016 12/9/2016 12/10/2016 12/11/2016 12/12/2016 12/13/2016 12/14/2016 12/15/2016 12/16/2016 12/17/2016 12/18/2016 12/19/2016 12/20/2016 12/21/2016 12/22/2016 12/23/2016 12/24/2016 12/25/2016 12/26/2016 12/27/2016 12/28/2016 12/29/2016 12/30/2016 12/31/2016 1/1/2017 0.1 0.03 0.52 0.26 1.16 0.05 0.52 0.42 0.06 0.19 0.2 0.06 0.17 0.23 0.04 0.29 0.21 0.06 1/2/2017 1/3/2017 1/4/2017 1/5/2017 1/6/2017 1/7/2017 1/8/2017 1/9/2017 1/10/2017 1/11/2017 1/12/2017 1/13/2017 1/14/2017 1/15/2017 1/16/2017 1/17/2017 1/18/2017 1/19/2017 1/20/2017 1/21/2017 1/22/2017 1/23/2017 1/24/2017 1/25/2017 1/26/2017 1/27/2017 1/28/2017 1/29/2017 1/30/2017 1/31/2017 2/1/2017 2/2/2017 2/3/2017 2/4/2017 2/5/2017 2/6/2017 2/7/2017 2/8/2017 2/9/2017 2/10/2017 2/11/2017 2/12/2017 2/13/2017 (30000000 0.01 0.66 0.71 0.68 0.39 0.76 1.55 0.06 0.01 2/14/2017 2/15/2017 2/16/2017 2/17/2017 2/18/2017 2/19/2017 2/20/2017 2/21/2017 2/22/2017 2/23/2017 2/24/2017 2/25/2017 2/26/2017 2/27/2017 2/28/2017 3/1/2017 3/2/2017 3/3/2017 3/4/2017 3/5/2017 .3/6/2017 3/7/2017 3/8/2017 3/9/2017 3/10/2017 3/11/2017 3/12/2017 3/13/2017 3/14/2017 3/15/2017 3/16/2017 3/17/2017 3/18/2017 3/19/2017 3/20/2017 3/21/2017 3/22/2017 3/23/2017 3/24/2017 3/25/2017 3/26/2017 3/27/2017 3/28/2017 0.23 1.65 0.46 0.13 0.12 0.2 0.22 0.01 0.03 0.26 0.46 0.07 0.59 0.03 0.11 0.46 0.03 0.53 0.02 0.28 0.02 0.51 0.36 0.71 0.77 0.47 0 0 0.17 0 0.25 0.45 0.01 0.31 0.08 0.08 ATTACHMENT A Precipitation Data 12 3/29/2017 3/30/2017 3/31/2017 4/1/2017 4/2/2017 4/3/2017 4/4/2017 4/5/2017 4/6/2017 4/7/2017 4/8/2017 4/9/2017 4/10/2017 4/11/2017 4/12/2017 4/13/2017 4/14/2017 4/15/2017 4/16/2017 4/17/2017 4/18/2017 4/19/2017 4/20/2017 4/21/2017 4/22/2017 4/23/2017 4/24/2017 4/25/2017 4/26/2017 4/27/2017 4/28/2017 4/29/2017 4/30/2017 5/1/2017 5/2/2017 5/3/2017 5/4/2017 5/5/2017 5/6/2017 5/7/2017 5/8/2017 5/9/2017 5/10/2017 0.41 0.01 0.06 0.05 0.09 0.51 0.27 0.37 0.06 0.01 0.35 0.01 0.87 0.13 0.02 0.06 0.22 0.38 0 0 0.13 0.21 0.02 0.01 0.04 0.02 0.06 0.00 0.05 0.07 0.13 0.19 0.30 0.19 0.43 0 0 0 0 5/11/2017 5/12/2017 5/13/2017 5/14/2017 5/15/2017 5/16/2017 5/17/2017 5/18/2017 5/19/2017 5/20/2017 5/21/2017 5/22/2017 5/23/2017 5/24/2017 5/25/2017 5/26/2017 5/27/2017 5/28/2017 5/29/2017 5/30/2017 5/31/2017 6/1/2017 6/2/2017 6/3/2017 6/4/2017 6/5/2017 6/6/2017 6/7/2017 6/8/2017 6/9/2017 6/10/2017 6/11/2017 6/12/2017 6/13/2017 6/14/2017 6/15/2017 6/16/2017 6/17/2017 6/18/2017 6/19/2017 6/20/2017 6/21/2017 6/22/2017 0.38 0.19 0.08 0.01 .053 1-403 0.05 .0 Q0600 6/23/2017 6/24/2017 6/25/2017 6/26/2017 6/27/2017 6/28/2017 6/29/2017 6/30/2017 7/1/2017 7/2/2017 7/3/2017 7/4/2017 7/5/2017 7/6/2017 7/7/2017 7/8/2017 7/9/2017 7/10/2017 7/11/2017 7/12/2017 7/13/2017 7/14/2017 7/15/2017 7/16/2017 7/17/2017 7/18/2017 7/19/2017 7/20/2017 7/21/2017 7/22/2017 7/23/2017 7/24/2017 7/25/2017 7/26/2017 7/27/2017 7/28/2017 7/29/2017 7/30/2017 7/81/2017 8/1/2017 8/2/2017 8/3/2017 8/4/2017 ATTACHMENT A - Precipitation Data 13 8/5/2017 8/6/2017 8/7/2017 8/8/2017 8/9/2017 8/10/2017 8/11/2017 8/12/2017 8/13/2017 8/14/2017 8/15/2017 8/16/2017 8/17/2017 8/18/2017 8/19/2017 8/20/2017 8/21/2017 8/22/2017 8/23/2017 8/24/2017 8/25/2017 8/26/2017 8/27/2017 8/28/2017 8/29/2017 8/30/2017 8/31/2017 9/1/2017 9/2/2017 9/3/2017 9/4/2017 9/5/2017 9/6/2017 9/7/2017 9/8/2017 9/9/2017 9/10/2017 9/11/2017 9/12/2017 9/13/2017 9/14/2017 9/15/2017 9/16/2017 N.) 0.0 9/17/2017 9/18/2017 9/19/2017 9/20/2017 9/21/2017 9/22/2017 9/23/2017 9/24/2017 9/25/2017 9/26/2017 9/27/2017 9/28/2017 9/29/2017 9/30/2017 10/1/2017 10/2/2017 10/3/2017 10/4/2017 10/5/2017 10/6/2017 10/7/2017 10/8/2017 10/9/2017 10/10/2017 10/11/2017 10/12/2017 10/13/2017 10/14/2017 10/15/2017 10/16/2017 10/17/2017 10/18/2017 10/19/2017 10/20/2017 10/21/2017 10/22/2017 10/23/2017 10/24/2017 10/25/2017 10/26/2017 10/27/2017 10/28/2017 10/29/2017 10/30/2017 10/31/2017 11/1/2017 11/2/2017 11/8/2017 11/4/2017 11/6/2017 11/8/2017 11/9/2017 11/10/2017 11/11/2017 11/12/2017 11/13/2017 11/14/2017 11/15/2017 11/16/2017 11/17/2017 11/18/2017 11/19/2017 11/20/2017 11/21/2017 11/22/2017 11/23/2017 11/24/2017 11/25/2017 11/26/2017 11/27/2017 11/28/2017 11/29/2017 11/30/2017 12/1/2017 12/2/2017 12/3/2017 12/4/2017 12/5/2017 1.2/6/2017 12/7/2017 12/8/2017 12/9/2017 12/10/2017 1.2/11/2017 12/12/2017 12/13/2017 GOO 0.08 0.01 0.18 0.27 0.14 0.57 0.61 0.07 0.64 0.08 0.88 0.49 1.26 0.56 0.1 0.22 0.2 0.57 0.01. 0.26 0.21 993 C36) phi?l ATTACHMENT A Precipitation Data 14 12/14/2017 12/15/2017 12/16/2017 12/17/2017 12/18/2017 12/19/2017 12/20/2017 12/21/2017 12/22/2017 12/28/2017 12/24/2017 12/25/2017 12/26/2017 12/27/2017 12/28/2017 12/29/2017 12/80/2017 12/31/2017 1/1/2018 1/2/2018 1/3/2018 1/4/2018 1/5/2018 1/6/2018 1/7/2018 1/8/2018 1/9/2018 1/10/2018 1/11/2018 1/12/2018 1/18/2018 1/14/2018 1/15/2018 1/16/2018 1/17/2018 1/18/2018 1/19/2018 1/20/2018 1/21/2018 1/22/2018 1/23/2018 1/24/2018 1/25/2018 0.07 0.18 0.38 0.67 0.02 0.05 0.22 0.14 0.8 0.89 0.12 1/26/2018 1/27/2018 1/28/2018 1/29/2018 1/30/2018 1/31/2018 2/1/2018 2/2/2018 2/3/2018 2/4/2018 2/5/2018 2/6/2018 2/7/2018 2/8/2018 2/9/2018 2/10/2018 2/11/2018 2/12/2018 2/13/2018 2/14/2018 2/15/2018 2/16/2018 2/17/2018 2/18/2018 2/19/2018 2/20/2018 2/21/2018 2/22/2018 2/23/2018 2/24/2018 2/25/2018 2/26/2018 2/27/2018 2/28/2018 3/1/2018 3/2/2018 3/3/2018 3/4/2018 3/5/2018 3/6/2018 8/7/2018 3/8/2018 8/9/2018 8/10/2018 8/11/2018 8/12/2018 3/18/2018 8/14/2018 8/15/2018 8/16/2018 3/17/2018 8/18/2018 8/19/2018 3/20/2018 8/21/2018 8/22/2018 3/23/2018 8/24/2018 3/25/2018 8/26/2018 8/27/2018 3/28/2018 3/29/2018 8/80/2018 8/81/2018 4/1/2018 4/2/2018 4/8/2018 4/4/2018 4/5/2018 4/6/2018 4/7/2018 ATTACHMENT A Precipitation Data 15 ATTACHMENT STATE OF WASHINGTON DEPARTMENT OF ECOLOGY Northwest Regional Of?ce a 3790 160th Ave SE a Beifevue, WA 98008-5452 a 425-649v7000 7? I for Washington Relay Service 0 Persons with a Speech disability can call 877~833-6341 August 25, 2017 Susanne Mellveen The Boeing Company PO. Box 3707 Seattle, WA 98125 Re: Stormwater Engineering Report Boeing Military Flight Center at 10002 Marginal Way South, Tukwila, WA Dear M32. McIlveen, The Washington State Department of Ecology (Ecology) has reviewed The Boeing Company?s (Boeing) Stormwater Engineering Report (Report) prepared by Landau Associates and submitted to comply with Administrative Order (Order) Docket No. 13932, dated March 23, 2017, for the Boeing Military Flight1 Center (Facility). Ecology?s Northwest Regional Of?ce (N WRO) received the Report on July 7, 2017. Be Li, PE, at Ecology?s NWRO, reviewed the Report. Ecology cannot grant approval of the Report. Ecology ?nds that the engineering design provided does not demonstrate that the Facility can meet the requirements in the Industrial Stormwater General Permit (ISGP), Permit 50 (Permit). Ecology?s conclusion is based on the ?ndings below. 1, The Report fails to propose treatment for runoff from Area 1. Boeing does not monitor discharges from Area 1. The lack of monitoring for Area 1 indicates that Boeing has determined that the industrial activities in Area 1 are substantially identical to Area 2 according to permit condition 84.13.20. Accordingly, the same treatment implemented for Area 2 is required for Area I as well. 1 Boeing has requested to change the name of'the facility to Military Delivery Center. Until such time as the name change is of?cially requested and processed, Ecology wili use Military light Center. S. Mollveen, Boeing August 25, 2017 Page 2 of 3 2. The Report fails to adequately describe the pipe repair proposed for Area 4: Detailed design is needed for the pipe repair. Specify which alternative is proposed and provide a detailed engineering design. Existing Area 2 in?ltration must cease and proposed additional in?ltration is not ap. proved. in?ltration of untreated industrial storrnwater above the ground water quality standards of WAC 173-200 is not allowed according to Permit condition 810A and must cease. Industrial stormwater must meet the groundwater quality standards of WAC 173- 200 before discharge to the ground surface or be discharged to a properly engineered and constructed in?ltration system as detailed in the current version of the Stormwater Management Manual for Western Washington (Manual) or an approved equivalent. The existing rock in?ltration trench and proposed in?ltration system do not meet the design standards and requirements for in?ltration systems as detailed in the Manual. Untreated runoff from Area 2 must not sheet ?ow onto the adiacent site. Runoff from Area 2 sheet flows east to the adjacent property. According to Permit condition S3.B.4.b.ii.2, regarding structural source control BMPs, permittees shall ?use grading, harming, or curbing to prevent runoff of contaminated ?ows and divert run?on away ??om these areas.? Boeing must use grading, berming, curbing, or another acceptable alternative, that ensures untreated runoff does not sheet ?ow to the adjacent site. Treatment must be proposed for Area 2 and Area 1. Boeing must propose treatment for runoff from Area 2. As described above, because Area 1 has substantially similar industrial activities as Area 2, the runoff from Area 1 must be treated equivalent to runoff from Area 2. The proposed treatment technology and design needs to be able to reduce pollutants in stormwater runoff suf?cient to meet applicable water quality standards, ef?uent limits, and benchmarks. The proposed treatment must also address PCBs (see below and Table 2 of the Report). Treatment proposed for Area 3 is insuf?cient. The Area 3 monitoring results (Table 2 of the Report) indicate that there are levels of PCBs that exceed chronic aquatic life criteria for marine water (0.03 ug/L) in discharges. The proposed CleanWay catch basins inserts with l'l/IetalZorbTM media are not designed for PCB removal and have not been demonstrated to be able to address PCBs. Alternative treatment needs to be selected and designed to address PCBs in the discharges. In closing, the engineering analysis and other details provided in the Report do not demonstrate Permit compliance and will not protect surface and groundwater quality. Boeing must address the issues noted above and revise and resubmit the engineering report for Ecology?s review and approval as soon as possible. Implementation of the approved treatment is due by October 31, 2017. Ecology may take further enforcement actions if the issues noted above are not addressed. If you have questions or need additional information, please do not hesitate to contact Bo Li, RE. S. McIIvccn, Boeing August 25, 2017 Page 3 of 3 at bo.li@ecy.wa.gov, or call her at (425) 649?7284; or Robert Wright at robe11.might@ecy.wa.gov, or call him at (425) 649-7060. Sincerely, Va?? Mark Henley, RE. Water Quality Section Manager Northwest Regional Of?ce . cc: Central File: WQ 9.5, Boeing Military Flight Center, Bo Li, NWRO, Ecology Ronald Lavigne, AAG, Attorney General?s Of?ce