4i South Coast Plaza Hydrogen Sulfide Reduction Program Costa Mesa Sanitary District …an Independent Special District Protecting our community’s health and the environment by providing solid waste and sewer collection services. www.cmsdca .gov Memorandum To: Board of Directors From : Scott Carroll, General Manager Date: February 18, 2014 Subject: South Coast Plaza Hydrogen Sulfide Reduction Program Summary For the past two years the District, along with Environmental & Engineering Contrac ting, Inc. (EEC) and South Coast Plaza (SCP) management, have been developing procedures to reduce hydrogen sulfide levels (H2S) in the District owned sewer lift station located on Plaza prope r ty. H2S is a gas that often results from the bacterial breakdown of organic matter in the absence of oxygen , such as in sewer systems. It has caused severe corrosion in the lift station and it will emit a rotten egg smell in the atmosphere that has resulted in complaints from Plaza customers. Staff Recommendation That the Board of Directo rs give staff dire ction to bringing South Coast Plaza restaurants Boudin Bakery, Corner Bakery Café and Marche Moderne into compliance with their wastewater permitted discharge limits. Analysis In 2012 , the Dist rict embarked on a case study at SCP to determine if chemicals addi tives are proven effective to reducing sulfide levels in grease interceptors . In the past, the District has applied chemicals in the lift station wet well that has been helpful masking the odor; however, the objective of the study was to identify fea sible options for effectively mitigating the wastewater sulfides at the source (e.g. grease interceptors) so that odor and corrosion is minimized at the station and the District can optimize its resources at the lift station . EEC, with the co operation fro m SCP management, conducted the case study. The results found that ev en though there was not a specific chemical additive that had extraordinary results to re ducing sulfide levels, the additives used did prove to be effective for mitigating
Board of Directors February 18, 2014 Page 2 of 3 dissolved sulfi de levels in grease interceptors . Additional recommendations were made by EEC and can be found in the case study attached hereto at Attachment A. EEC representatives will be attending today’s study session to provide more inf ormation about the case study and will be available to answer questions. It should be noted that since the study was conducted Rainforest Café has closed its do ors at SCP and a new restaurant will take its place. EEC has provided recommendations to SCP management on the right sized grease interceptor installation for the new tenant. As of January 2014 SCP has not indicated that the grease interceptor will be resized, or when a new tenant will occupy the old Rainforest Café space. Staff and EEC presented the findings of the study to SCP management and after further discussion the group developed procedures to roll out the program to every restauran t in the Plaza. In March 2013 the District and SCP management delivered simultaneously two separate letters about the new procedures for r educing H2S lev els. The District letter, the sample is attached hereto as Attachment B , describes the problem and provided suggested corrective actions including use of the chemical additives evaluated in the study . The SCP management letter described th eir support for the procedures and encouraged restaurants to comply with District standards. Both letters were mailed to seventeen restaurants in the Plaza. The list of restaurants is available in Attachment C. By November 2013 , EEC identified three res taurants with sulfide levels that are still above their permitted discharge limits. Those three restaurants are: Boundin Bakery, Corner Bakery and Marche Moderne. On November 15, 2013, District mailed follow up letters to the restaurant managers expressin g the importance to reducing sulfide lev els and requested immediate implementation of corrective actions to reduce the levels by December 20, 2013 (See letters in Attachment D); however, when EEC conducted a follow -up inspection on December 30, 2013 , EEC f ound these restaurants had not implemented any corrective actions and were still in noncompliance. Therefore, s taff believes t he District has three options to consider : 1. Do nothing. 2. Send another follow up letter. 3. Issue an administrative citation in the am ount of $250. Option three would require staff to follow the guidelines outlined in Chapter 1.06 of the District’s Operations Code. Currently, the District’s Enforcement Officer has the authority to issue administrative citations . After issuing the cita tion, the restaurants have a right for due process where they can request an administrative hearing, but the fine must be paid in full before scheduling said hearing . The General Manager serves as the hearing officer ; however, due t o my involvement in the hydrogen sulfide program at SCP, I would most likely appoint someone that is not involve d in the program to avoid possible claims that the hearing officer is bias and/or prejudice.
Board of Directors February 18, 2014 Page 3 of 3 Strategic Plan Element & Goal This item supports achieving Strategic El ement No. 1 .0, Sewer Infrastructure and Strategic Goal No. 1.7, Pump Station Maintenance & Standardization Program. Legal Review Not applicable at this time; however, District Counsel may be required if administrative hearings are scheduled. Environment al Review A program to reduce hydrogen sulfide odors and the resulting corrosion in private and public sewer systems is categorically exempt under the California Environmental Quality Act (CEQA) (Public Resources Code Section 21000 et. seq.) under Section 15301 Existing Facilities as “Class 1 consists of the … maintenance … of existing public or private structures”, as further described in Section (b) as “Existing facilities of both investor and publicly -owned utilities used to provide …. sewerage …” Finan cial Review The cost to perform the case study was $7,670 . In addition, it has cost the District $2,055 to implement the new procedures for reducing hydrogen sulfide levels at South Coast Plaza. Public Notice Process Copies of this report are on file and will be included with the entire agenda packet for the February 18, 2014 Bo ard of Directors study session at District Headquarters and on District website. Alternative Actions 1. Refer the matter back to staff for additional information. Attachments A : Case Study B: Sample Letter to SCP restaurants C: List of SCP restaurants D: Letters to Boudin Bakery, Corner Bakery Café, and Marche Moderne
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Grease Interceptor Sulfide Mitigation Study at South Coast Plaza November 5, 2012 W1425.010 Costa Mesa Sanitary District i EEC TABLE OF CONTENTS 1.0 INTRODUCTION ............................................................................................................................... 1 2.0 OBJECTIVES ...................................................................................................................................... 1 3.0 BACKGROUND .................................................................................................................................. 1 3.1 Sewer Odors ........................................................................................................................ 1 3.2 Historical Odor Issues / Mitigation Efforts .......................................................................... 3 3.3 Study Area ........................................................................................................................... 4 4.0 FIELD ACTIVITIES .............................................................................................................................. 5 4.1 Wastewater Sampling and Visual Observations ................................................................. 6 4.1.1 Airborne Hydrogen Sulfide Gas ............................................................................. 7 4.1.2 Dissolved Sulfide .................................................................................................... 7 4.1.3 Temperature/pH .................................................................................................... 8 4.2 Maintenance Condition Assessment .................................................................................. 8 5.0 FINDINGS/RESULTS .......................................................................................................................... 7 5.1 Boudin SF ............................................................................................................................ 9 5.2 Rainforest Café .................................................................................................................. 10 5.3 Corner Bakery ................................................................................................................... 11 5.4 Marche Moderne .............................................................................................................. 12 5.5 Claim Jumper .................................................................................................................... 13 5.6 Z’Tejas ............................................................................................................................... 14 5.7 Capital Grille / Seasons 52 ................................................................................................ 16 5.8 Summary ........................................................................................................................... 17 6.0 RECOMMENDATIONS .................................................................................................................... 18 TABLES Table 4 ‐1 EEC Field Visits to Date ....................................................................................................... 6 Table 5 ‐1 Boudin SF Gravity Grease Interceptor Results .................................................................... 9 Table 5 ‐2 Rainforest Café Gravity Grease Interceptor Sampling Results ......................................... 10 Table 5 ‐3 Corner Bakery Gravity Grease Interceptor Sampling Results ........................................... 11 Table 5 ‐4 Marche Moderne Gravity Grease Interceptor Sampling Results ...................................... 13 Table 5 ‐5 Claim Jumper Gravity Grease Interceptor Sampling Results ............................................ 14 Table 5 ‐6 Z’Tejas Gravity Grease Interceptor Sampling Results ....................................................... 15 Table 5 ‐7 Capital Grille / Seasons 52 Gravity Grease Interceptor Sampling Results ........................ 16 FIGURES Figure 3 ‐1 H 2 S Toxicity Spectrum ......................................................................................................... 2 Figure 3 ‐2 H 2 S Gas Concentrations, Airborne vs. Dissolved ................................................................ 3 Figure 3 ‐3 Locations of Gravity Grease Interceptors at South Coast Plaza ......................................... 5 Figure 4 ‐1 Sample Point Locations within Gravity Grease Interceptors .............................................. 7 Figure 4 ‐2 CHEMetricts R ‐9510 Colorimetric Field Tester ................................................................... 7 Figure 4 ‐3 Wastewater Core Sampler .................................................................................................. 8 Figure 5 ‐1 Corner Bakery Sample Box ................................................................................................ 12 Figure 5 ‐2 Z’Tejas Sample Box ........................................................................................................... 15
Grease Interceptor Sulfide Mitigation Study at South Coast Plaza November 5, 2012 W1425.010 Costa Mesa Sanitary District 1 EEC 1.0 INTRODUCTION For years, the Costa Mesa Sanitary District (District) has worked in cooperation with the South Coast Plaza (Plaza) to address sewer odor and corrosion issues within the Plaza, particularly in areas associated with the District’s South Coast Plaza pumping station, located at the northeast corner of the south parking structure (see Figure 3 ‐3). The District, which owns the public sewer system serving the Plaza, has taken measures to mitigate the odor issues through the use of chemical additives, frequent cleaning of the lift station, and upgrades to the sewage lift station. The Plaza has also taken measures to mitigate the odor issues, including installation of a vent blower at the lift station and evaluation of chemical additives (applied at several of the grease interceptors tributary to this lift station). Each of these measures has helped to reduce the occurrence of reported odors; however, the measures have not fully mitigated the issue. To further characterize the sources of the corrosion and odor issues and evaluate the effectiveness of available chemical additives for mitigation of these issues, the District commissioned Environmental Engineering and Contracting, Inc. (EEC) to conduct a study of the wastewater from the grease interceptors discharging to the Plaza lift station. The study consisted of field data collection and analysis of wastewater generated under various site conditions, coordinated with the application of a variety of chemical additives. EEC has prepared this report to summarize the findings from the study and provide recommendations for follow ‐up actions to effectively mitigate the sulfide issues at the Plaza. 2.0 OBJECTIVES The District and Plaza have been diligent in their efforts to address sulfide issues. Generally, the implemented corrective measures to date have been helpful in masking the symptom (i.e., sulfide odors); however, efforts to mitigate the cause (i.e., sulfide generation in grease interceptors) have not yet proven consistently effective. The objective of this study is to identify feasible options for effectively mitigating the wastewater sulfides at the source, thereby reducing the potential for nuisance odor issues and optimizing the resources required to continue mitigation of these issues further downstream in the Plaza lift station and downstream sewer system. 3.0 BACKGROUND 3.1 Sewer Odors Hydrogen sulfide ( H 2 S) is a colorless gas that is commonly identified in low concentrations (less than 1 decaying organic material, particularly under low ‐oxygen conditions; therefore, H 2 S is commonly encountered in places such as grease interceptors, sewer pipelines, and sewage lift stations. Unmitigated, H 2 S poses a potential health risk for sewer maintenance personnel, causes damage (corrosion) to sewer system structures, and is a source of nuisance odors to the general public (Figure 3 ‐1, H 2 S Gas Toxicity Spectrum ).
Grease Interceptor Sulfide Mitigation Study at South Coast Plaza November 5, 2012 W1425.010 Costa Mesa Sanitary District 2 EEC Figure 3 ‐1, H 2 S Gas Toxicity Spectrum The wastewater from the sinks, drains, and cooking equipment of many of the Plaza’s food service establishments (FSEs) flows into grease interceptors prior to discharging to the District's sanitary sewer system. Each grease interceptor provides a separation method whereby the fats, oils, and grease (FOG) in the wastewater floats and collects on top of the water, and the food solids in the wastewater settle and collect at the bottom. The floating FOG and settled solids are removed during routine cleaning of the grease interceptor. The wastewater from the grease interceptor (which is largely free of FOG/solids) flows into the sanitary sewer system. Depending on the amount and type of FOG/solids ‐laden wastewater that is rinsed down the FSE kitchen drains, grease interceptor size and maintenance condition, and other characteristics, such as wastewater temperature and acidity (pH), each grease interceptor has the potential to generate sulfides. Larger, oversized grease interceptors are more susceptible to becoming sources of sulfides, but smaller interceptors can also experience sulfide issues. The sulfides generated under these conditions are dissolved within the wastewater, but are easily released from solution through agitation or mixing. When it flows from its source to downstream pipelines and structures (lift stations, manholes, etc.), sulfide ‐laden wastewater is naturally agitated and mixed, which releases the H 2 S gas and results in sulfide odors. The H 2 S gas also combines with moisture in the air to create sulfuric acid, which corrodes grease interceptor surfaces and other sewer system structures. Under certain conditions, low levels of dissolved sulfide can result in very high levels of airborne H 2 S . As an example, within a sewer pipeline, the sewer atmosphere can exhibit very high concentrations of H 2 S gas associated with low concentrations of dissolved H 2 S, as depicted in Figure 3 ‐2, H 2 S Gas Concentrations, Airborne vs. Dissolved (Pipeline Atmosphere Example).
Grease Interceptor Sulfide Mitigation Study at South Coast Plaza November 5, 2012 W1425.010 Costa Mesa Sanitary District 3 EEC Figure 3 ‐2, H 2 S Gas Concentrations, Airborne vs. Dissolved Key: °C = degrees Celsius H 2 S = hydrogen sulfide mg/l = milligrams per liter ppm = parts per million To minimize and prevent the negative impacts caused by H 2 S that include potential health risks, corrosion, and nuisance odors, the District has established H 2 S ‐related compliance criteria: Dissolved sulfide must not exceed 0.5 mg/L (based on OCSD wastewater discharge limit) Airborne H 2 S must not exceed 1 ppm (below typical offensive odor threshold) 3.2 Historical Odor Issues / Mitigation Efforts Due to the elevation of the southeast section of the Plaza, including several FSEs, wastewater from this section needs to be pumped to the District’s public sewer system; the pumping station is known as the South Coast Plaza lift station. Historically, the Plaza lift station has been identified as the source of sulfide odor issues. To mitigate these issues, the District has implemented the following corrective measures: Enhanced cleaning program for the lift station Chemical additive (Golden Bio) application at a cost to the District of $1,200 to $1,800 per month Installation of a down ‐drain inlet configuration to reduce turbulence (agitation) within the lift station and minimize the release of sulfide gases from the wastewater
Grease Interceptor Sulfide Mitigation Study at South Coast Plaza November 5, 2012 W1425.010 Costa Mesa Sanitary District 4 EEC The Plaza has also implemented corrective measure to mitigate the lift station odor issues: Installation of a vent blower to disperse the sewer gases emanating from the lift station Application and evaluation of grease interceptor applied chemical additives (in coordination with District interceptor inspection activities) Generally, both the District’s and Plaza’s corrective measures have been helpful in masking the symptom (i.e., sulfide odors); however, these efforts have not been effective at consistently mitigating the cause (i.e., sulfide generation in grease interceptors) for the long term. 3.3 Study Area South Coast Plaza is a large ‐scale shopping mall located in Costa Mesa, California. The Plaza contains several FSEs that typically operate between the hours of 8:00 a.m. and 11:00 p.m.; several of the FSEs are connected to gravity grease interceptors (GGIs) within the Plaza property. This study evaluated the GGIs in the southeast section of the Plaza that discharge to the Plaza lift station (Figure 3 ‐3, Locations of Gravity Grease Interceptors at South Coast Plaza ): Boudin SF (1,500 ‐gallon GGI) Rainforest Café (3,500 ‐gallon GGI) Corner Bakery (1,500 ‐gallon GGI) Claim Jumper (2,000 ‐gallon GGI) Z ‐Tejas (750 ‐gallon unit) Capital Grille / Seasons 52 (share a 4,000 ‐gallon unit)
Grease Inte W1425.010 In additi o study ev e evaluatio n Two of t structure s parking l o 4.0 F Sulfide l e wastewa t routinely ware/eq u rceptor Sulfide M Costa Mesa Sa n Figure 3 ‐o n to these s e n though it n activities (c he GGIs (Ra s , one is loca t o t areas (Figu IELD ACTI V e vels within t er resides i n discharged u ipment was h M itigation Stud y n itary District ‐3, Locatio n ix facilities, t does not d ommissione d inforest Caf é t ed in an out s r e 3 ‐3). V ITIES grease inte n the interc e to the gr e h ing activitie s y at South Coast n s of Grav i t he Marche M ischarge to d by the Plaz a é and Corne s ide planter (rceptor was t ptor (retent i e ase interc e s . This flow o f Plaza 5 ty Grease I M oderne fac i the Plaza lif t a ) were alrea d r Bakery) ar e Claim Jumpe t ewater can i on time). D u e ptor as a f water brin g I ntercepto r i lity (1,500 ‐g a f t station be c d y in progres s e located o n r), and the r e be affecte d u ring restau r result of a g s added oxy g r s at Sout h a llon GGI) w a c ause some s . n the groun d e maining are d by the le n r ant operati o a ctive food g en (dissolve November 5 h Coast Pla z a s included i chemical ad d floor of p a located in o u n gth of tim e o ns, wastew a preparation d oxygen) in t 5 , 2012 EEC z a n this d ditive a rking u tdoor e the a ter is and t o the
Grease Interceptor Sulfide Mitigation Study at South Coast Plaza November 5, 2012 W1425.010 Costa Mesa Sanitary District 6 EEC interceptor that can reduce the potential for generation of sulfides. During times of inactive kitchen operations, when wastewater discharge to the interceptor is reduced or stopped, the additional oxygen is discontinued and the potential for sulfide generation can be increased. To characterize interceptor wastewater during active and inactive kitchen/wastewater discharge activities, sampling events were scheduled and conducted on varying days of the week and varying times of the day over the course of several months and seasons (Table 4 ‐1, EEC Field Visits to Date ). The field visits consisted of wastewater sampling, core sampling and visual observations of each GGI. Table 4 ‐1, EEC Field Visits to Date Date Day of Week Action Time of Day Ambient Temperature (°F) 2/21/2012 Tuesday GGI Sampling Event Morning 47–65 2/27/2012 Monday GGI Sampling Event Evening 55 3/8/2012 Thursday GGI Sampling Event Morning 65–72 3/20/2012 Tuesday GGI Sampling Event Evening 54–55 4/5/2012 Thursday GGI Sampling Event Morning 54–56 5/31/2012 Thursday GGI Sampling Event Morning 63–66 6/8/2012 Friday GGI Sampling Event Morning 63–67 6/27/2012 Wednesday GGI Sampling Event Evening 73 6/29/2012 Friday GGI Sampling Event Morning 64–70 7/10/2012 Tuesday GGI Sampling Event Evening 70–71 Key: °F = degrees Fahrenheit GGI = gravity grease interceptor 4.1 Wastewater Sampling and Visual Observations Sample collection and field analysis was performed for wastewater from each grease interceptor. All attempts were made to collect samples representative of the effluent discharge from each interceptor. With the exception of the Claim Jumper interceptor, all of the interceptors in the study included a sample box, which enabled retrieval of representative grab samples. Because there is not a sample box, the samples from the Claim Jumper interceptor were collected from the second chamber (from below the floating FOG layer), as close to the interceptor outlet flow as possible (Figure 4 ‐1, Sample Point Locations within Gravity Grease Interceptors ).
Grease Inte W1425.010 F I Field ana conducte d 4.1.1 A A four ‐ga H 2 S level i 4.1.2 D A visual c in each w Colorime t rceptor Sulfide M Costa Mesa Sa n F igure 4 ‐1 ,I nterceptor lysis was pe r d within 5 mi A irborne Hy d s photoioniz a i nside each g D issolved Su lf olorimetric f i w astewater s t ric Field Tes t e Fig u M itigation Stud y n itary District , Sample P o s with Sam p r formed usi n nutes of sam d rogen Sulfi a tion detect o rease interce lf ide i eld test (CH E s ample colle c er ). u re 4 ‐2, CH y at South Coast o int Locati o p le Box n g common e ple collectio n de Gas o r field mete r ptor prior to E Metrics R ‐9 5 c ted from th EMetrics R Plaza 7 o ns within Clai m e nvironment a n . r (MultiRAE P fully openin g 5 10) was use d e grease int R ‐9510 Col o Gravity G r m Jumper G r a l field equi p P lus) was util i g for sample c d to determi n erceptors (F i o rimetric F r ease Inter r avity Grea s p ment, with ized to dete r c ollection. n e the level o i gure 4 ‐2, C H F ield Tes t e r November 5 ceptors s e Intercep t all measure m r mine the air b o f dissolved s H EMetricts R r 5 , 2012 EEC t or m ents b orne s ulfide ‐9510
Grease Interceptor Sulfide Mitigation Study at South Coast Plaza November 5, 2012 W1425.010 Costa Mesa Sanitary District 8 EEC 4.1.3 Temperature/pH A field temperature meter (HANNA HL 1288) was used to measure temperature and pH of each sample of grease interceptor wastewater. The effluent sampling locations in the GGI are shown in Figure 4 ‐1. 4.2 Maintenance Condition Assessment In addition to effluent from the interceptor, the maintenance condition of each interceptor was also evaluated due to its potential to contribute to the generation of sulfides. Excessive loading of FOG and solids within a grease interceptor provides increased opportunity for the decay of organic material, which generates sulfides. The maintenance condition of each subject grease interceptor was tested using a wastewater core sampler (Dip Stick Pro by Environmental Bio Solutions, Inc, Figure 4 ‐3) to measure the level of floating FOG and settled solids within the first and second chambers of the interceptor.). A grease interceptor is generally considered to be in proper maintenance condition when the combined level of floating FOG and settled solids does not exceed 25% of the interceptor depth; this is known as the 25% rule. When the combined level of floating FOG and settled solids exceeds 25% of the interceptor depth, the interceptor is considered to be in need of maintenance (called pump ‐out). Figure 4 ‐3, Wastewater Core Sampler
Grease Interceptor Sulfide Mitigation Study at South Coast Plaza November 5, 2012 W1425.010 Costa Mesa Sanitary District 9 EEC 5.0 FINDINGS/RESULTS 5.1 Boudin SF Based on historical pumping records, the 1,500 ‐gallon grease interceptor serving the Boudin SF facility is pumped out approximately once every six months. Based on core sampling observations, the kitchen wastewater from this facility contains more solids than FOG; however, the settled solids within the interceptor are loose and easily mixed (by normal wastewater flows and/or sampling activities), resulting in inconsistent measurements of settled solids. No use of an odor/sulfide ‐reducing chemical additive was reported for this interceptor and no additives were evaluated in this location during this study. Historically, dissolved H 2 S levels in the Boudin SF interceptor have been observed in the range of 7 to 10 milligrams per liter (mg/L) (from 2011 District sampling activities). Sampling during this study also showed a consistently high level of dissolved H 2 S (4.7 mg/L average; Table 5 ‐1, Boudin SF Gravity Grease Interceptor Results ). In addition, high levels of airborne H 2 S were detected during the majority of sampling events. Sulfide odors were generally evident after opening the lids to this interceptor. Routine inspections of the kitchen activities confirmed no chemical additive usage or atypical kitchen practices that might contribute to elevated sulfides in the grease interceptor. Table 5 ‐1, Boudin SF Gravity Grease Interceptor Sampling Results Date Time of Day FOG/Solids (%) pH Water Temp. (°F) Dissolved H 2 S (mg/L) Airborne H 2 S (mg/L) Last Pump Date Other 2/21/2012 6:50 23 5.5 72.2 6 50 1/3/2012 2/27/2012 21:15 13 5.7 75.5 5 63 1/3/2012 3/8/2012 8:05 22 5.5 79.9 3 11 1/3/2012 3/20/2012 19:10 12 5.5 74.7 3 3 1/3/2012 4/5/2012 7:40 6 5.1 75.3 3 11 1/3/2012 Sludge observed in SB 5/31/2012 7:50 8 6.0 79.3 7 3 1/3/2012 Sludge observed in SB 6/8/2012 8:30 8 6.0 71.7 8 0 1/3/2012 Sludge observed in SB 6/27/2012 20:50 26 5.7 72.9 4 0 1/3/2012 Sludge observed in SB 6/29/2012 7:50 ‐ ‐ ‐ ‐ ‐ 1/3/2012 Obstructed by vehicle 7/10/2012 21:15 2 5.9 82.0 3 0 7/3/12 No issues Key: °F = degrees Fahrenheit H 2 S = hydrogen sulfide mg/L = milligrams per liter SB = sample box The Boudin SF interceptor is not pumped on a regular basis and it experienced maintenance issues, including a damaged baffle tube and a sludge ‐like accumulation in the sample box (did not appear to be
Grease Interceptor Sulfide Mitigation Study at South Coast Plaza November 5, 2012 W1425.010 Costa Mesa Sanitary District 10 EEC FOG), during the study period. The FSE addressed all the issues prior to the conclusion of the study and committed to a quarterly pump ‐out schedule. Pumping alone did not appear to have a substantial effect on reducing H 2 S discharged from the Boudin SF interceptor. A measurement of 3 mg/L dissolved H 2 S was recorded on July 10, 2012, seven days after the previous pumping date. For comparison, the average sulfide measured at this GGI was 4.6 mg/L. 5.2 Rainforest Café Based on historical pumping records, the 3,750 ‐gallon interceptor serving the Rainforest Café is pumped out approximately once every 3 months (quarterly). Based on core sampling observations, the wastewater from this facility contains a similar level of floating FOG and settable solids. No odor/sulfide reducing chemical additive use was reported for this interceptor and no additives were evaluated in this location during the study. Historically, dissolved H 2 S levels in the Rainforest Café interceptor have been observed as high as 6 mg/L (from 2011 District sampling activities). Sampling during this study also showed a consistently high level of dissolved H 2 S (4.5 mg/L average; Table 5 ‐2, Rainforest Cafe Gravity Grease Interceptor Sampling Results ). In addition, high levels of airborne H 2 S were detected during the majority of sampling events. Strong sulfide odors were generally evident immediately after opening the lids to this interceptor. Routine inspections of the kitchen activities confirmed no chemical additive usage or atypical kitchen practices that might contribute to elevated sulfides in this grease interceptor. Table 5 ‐2, Rainforest Café Gravity Grease Interceptor Sampling Results Date Time FOG/ Solids (%) pH Water Temp. (°F) Dissolved H 2 S (mg/L) Airborne H 2 S (mg/L) Last Pump Date Other 2/21/2012 7:20 22% 4.9 81.3 7 10 12/24/2011 2/27/2012 20:25 17% 5. 6 80.5 2 33 12/24/2011 3/8/2012 8:20 16% 5.1 86.9 6 0 12/24/2011 3/20/2012 19:30 19% 5.3 80 4 14 12/24/2011 4/5/2012 8:00 2% 5.6 82.4 2 0 3/26/2012 5/31/2012 8:05 7% 6.3 80 5 24 3/26/12 6/8/2012 8:15 5% 6.1 81.7 4 24 3/26/12 6/27/2012 21:35 ‐ ‐ ‐ ‐ ‐ 6/25/12 Obstructed by vehicle 6/29/2012 7:40 2% 5.6 83.1 6 1 6/25/12 7/10/2012 21:00 16% 6.0 85.5 5 14 6/25/12 Key: °F = degrees Fahrenheit H 2 S = hydrogen sulfide mg/L = milligrams per liter This interceptor is pumped out on a quarterly basis, which appears to be effective in maintaining compliance with the 25% rule. Pumping alone did not appear to have a substantial effect on reducing H 2 S discharged from this interceptor. A measurement of 6 mg/L dissolved H 2 S was recorded on June 29,
Grease Interceptor Sulfide Mitigation Study at South Coast Plaza November 5, 2012 W1425.010 Costa Mesa Sanitary District 11 EEC 12, four days after the previous pumping date. For comparison, the average sulfide measured at this interceptor was 4.5 mg/L. 5.3 Corner Bakery Based on historical pumping records, the 1,500 ‐gallon grease interceptor serving the Corner Bakery facility is pumped once every 2 to 3 months. Based on core sampling observations, the kitchen wastewater from this facility appears to contain more solids than FOG; however, the settled solids within the interceptor are loose and easily mixed (by normal wastewater flows and/or sampling activities), resulting in inconsistent settled solids measurements. Historically, dissolved H 2 S levels in the Corner Bakery interceptor have been observed as high as 10 mg/L (from 2011 CMSD sampling activities). For periods during this study, a chemical additive, BioMagic, was utilized in this interceptor to sulfide control; however, due to coordination issues between the additive supplier and the Plaza, application of this additive was conducted only between March 1 and 14, 2012, and again between June 15 and July 10, 2012. For sampling conducted during the periods without additive application, dissolved H 2 S levels were observed between 2 and 8 mg/L (3.8 mg/L average; Table 5 ‐3, Corner Bakery Gravity Grease Interceptor Sampling Results ). Table 5 ‐3, Corner Bakery Gravity Grease Interceptor Sampling Results Date Time FOG/Solids (%) pH Water Temp. (°F) Dissolved H 2 S (mg/L) Airborne H 2 S (mg/L) Last Pump Date Other 2/21/2012 7:40 8 5.2 72.3 8 2 2/13/2012 SB contained FF 2/27/2012 20:00 17 5.1 71 3 1 2/13/2012 SB contained FF 3/8/2012 8:35 15 5.0 74.3 2 0 2/13/2012 SB contained FF 3/20/2012 20:00 4 4.8 67 2 ‐ 2/13/2012 SB contained FF 4/5/2012 8:30 8 5.1 72 3 0 2/13/2012 SB 5/31/2012 8:45 6 5.7 74 3 1 4/17/2012 SB, Unclear separation 6/8/2012 9:30 17 6.4 76.7 4 0 4/17/2012 SB 6/27/2012 21:25 ‐ 5.9 78.1 0 0 4/17/2012 Vehicle obscuring all but SB 6/29/2012 8:10 24 5.3 75.9 0 0 4/17/2012 7/10/2012 20:30 26 5.8 80 0 0 4/17/2012 Key: °F = degrees Fahrenheit H 2 S = hydrogen sulfide mg/L = milligrams per liter SB = sample box During the initial additive application period (March 1 to 14, 2012), approximately 1 gallon per day of the BioMagic product was applied to the kitchen wastewater through an automated dispensing system. Only one sampling event was conducted during this initial period; the dissolved H 2 S during the sampling event was observed at 2 mg/L. Upon re ‐establishment of additive application (between June 15 and July 10,
Grease Interceptor Sulfide Mitigation Study at South Coast Plaza November 5, 2012 W1425.010 Costa Mesa Sanitary District 12 EEC 2010), the dose was increased to approximately 1.25 gallons per day, resulting in H 2 S levels of 0 mg/L. During sampling events conducted without additive application, some low levels of airborne H 2 S were detected; however, noticeable sulfide odors were not evident. During sampling events during additive use, no airborne H 2 S was detected (Table 5 ‐3). This interceptor is pumped out every 2 to 3 months, which appears to be effective in maintaining compliance with the 25% rule; however, some floating debris/FOG was observed in the sample box, indicating potential pass ‐through to the downstream sewer system (i.e., the Plaza lift station; Figure 5 ‐1, Sample Box Containing FOG Pass ‐Through ). Pumping alone did not appear to have a substantial effect on reducing H 2 S discharged from the Corner Bakery interceptor. A measurement of 8 mg/L dissolved H 2 S was recorded on February 21, 2012, eight days after the previous pumping date (Table 5 ‐3). Figure 5 ‐1, Corner Bakery Sample Box 5.4 Marche Moderne Based on historical pumping records, the 1,500 ‐gallon grease interceptor serving the Marche Moderne facility is pumped once every 3 months. Based on interceptor core sampling observations, the wastewater from this facility contains similar levels of floating FOG and settable solids. Historically, dissolved H 2 S levels in the Marche Moderne interceptor have been observed between 3 and 7 mg/L (from 2011 District sampling activities). For a period of this study, a chemical additive, Enviroklean, was utilized in this interceptor to control sulfides; however, due to coordination issues between the additive supplier and the Plaza, application of this additive was only conducted between June 6 and July, 10, 2012. For sampling conducted prior to additive application, dissolved H 2 S levels were observed between 2 and 6 mg/L (3.5 mg/L average; Table 5 ‐4, Marche Moderne Gravity Grease Interceptor Sampling Results ).
Grease Interceptor Sulfide Mitigation Study at South Coast Plaza November 5, 2012 W1425.010 Costa Mesa Sanitary District 13 EEC Table 5 ‐4, Marche Moderne Gravity Grease Interceptor Sampling Results Date Time FOG/Solids (%) pH Water Temp. (°F) Dissolved H 2 S (mg/L) Airborne H 2 S (mg/L) Last Pump Date Other 2/21/2012 7:55 7 3.9 74 6 99 1/30/2012 2/27/2012 20:12 22 4.3 76 2 24 1/30/2012 3/8/2012 8:55 24 4.6 81.7 5 21 1/30/2012 3/20/2012 19:45 40 4.4 75.6 2 ‐ 1/30/2012 SB water was pink 4/5/2012 8:15 39 5.0 80.5 4 6 1/30/2012 5/31/2012 8:20 20 5.7 82.2 2 17 4/24/2012 6/8/2012 9:15 33 5.7 84 1 0 4/24/2012 6/27/2012 21:50 39 5.1 82.7 0 0 4/24/2012 6/29/2012 8:40 37 ‐ ‐ 0 5 4/24/2012 Temperature meter malfunctioned 7/10/2012 20:15 46 5.3 88.4 0 0 4/24/2012 Key: °F = degrees Fahrenheit H 2 S = hydrogen sulfide mg/L = milligrams per liter SB = sample box During the additive application period (June 6 to July 10, 2012), a dose of approximately 1.25 liters of the Enviroklean product was applied per day to the kitchen wastewater through an automated dispensing system, resulting in H 2 S levels of 0 mg/L. During sampling events without additive use, elevated levels of airborne H 2 S were detected and sulfide odors were evident immediately after opening the lids to this interceptor. For sampling events conducted during additive use, reduced airborne H 2 S levels were measured and no sulfide odors were observed. This interceptor is pumped out every 3 months, which appears to be ineffective in maintaining compliance with the 25% rule; however, no evidence of pass ‐through was observed in the sample box. Pumping alone did not appear to have a substantial effect on reducing H 2 S discharged from this interceptor. 5.5 Claim Jumper Based on historical pumping records, the 3,000 ‐gallon grease interceptor serving the Claim Jumper facility is pumped once every 3 months. Based on interceptor core sampling observations, the wastewater from this facility contains similar levels of floating FOG and settable solids. No odor/sulfide ‐reducing chemical additive use was reported for this interceptor and no additives were evaluated in this location during the study.
Grease Interceptor Sulfide Mitigation Study at South Coast Plaza November 5, 2012 W1425.010 Costa Mesa Sanitary District 14 EEC The Claim Jumper interceptor sampling showed some detectable levels of dissolved H 2 S throughout the study (0.8 mg/L average; Table 5 ‐5, Claim Jumper Gravity Grease Interceptor Sampling Results ). In addition, elevated levels of airborne H 2 S were detected during a couple of the sampling events. Sulfide odors were not evident after opening the lids to this interceptor. Routine inspections of the kitchen activities confirmed no chemical additive usage or atypical kitchen practices that might contribute to elevated sulfides in the grease interceptor. Table 5 ‐5, Claim Jumper Gravity Grease Interceptor Sampling Results Date Time FOG/Solids (%) pH Water Temp. (°F) Dissolved H 2 S (mg/L) Airborne H 2 S (mg/L) Last Pump Date 2/21/2012 8:20 15 3.9 82.2 3 55 12/5/2011 2/27/2012 20:55 20 5.6 87 0 1 12/5/2011 3/8/2012 9:35 24 4.6 94.2 0 1 3/6/2012 3/20/2012 21:35 25 5.2 103 0 ‐ 3/6/2012 4/5/2012 8:45 23 4.8 82 1 0 3/6/2012 5/31/2012 9:15 18 5.2 87 1 19 3/6/2012 6/8/2012 9:35 23 4.9 88.4 1 0 3/6/2012 6/27/2012 20:10 14 4.8 98 1 0 6/12/2012 6/29/2012 10:20 16 5.2 88.1 1 3 6/12/2012 7/10/2012 20:00 21 5.3 95.2 0 0 6/12/2012 Key: °F = degrees Fahrenheit H 2 S = hydrogen sulfide mg/L = milligrams per liter This interceptor is pumped out every three months, which appears to be effective in maintaining compliance with the 25% rule. Pumping alone did not appear to have a substantial effect on the level of H 2 S discharged from this interceptor. The average temperature of wastewater in this GGI was notably higher than at other interceptors in the study, which may be an indication of higher flow rates into this interceptor. 5.6 Z’Tejas Based on historical pumping records, the 750 ‐gallon grease interceptor serving the Z’Tejas facility is pumped once every 1 to 2 months. Based on interceptor core sampling observations, the wastewater from this facility contains similar levels of floating FOG and settable solids. A chemical additive, Golden Bio, has been utilized in this interceptor for sulfide control since early 2011 and throughout this study. During the study, the Golden Bio product was applied to the kitchen wastewater through an automated dispensing system (actual dosing data not made available by the additive supplier), resulting in dissolved H 2 S levels ranging from 0 to 2 mg/L (1.1 mg/L average; Table 5 ‐6, Z’Tejas Gravity Grease Interceptor Sampling Results ). Occasional low levels of airborne H 2 S were also detected; however, noticeable sulfide odors were not evident immediately after opening the grease interceptor.
Grease Interceptor Sulfide Mitigation Study at South Coast Plaza November 5, 2012 W1425.010 Costa Mesa Sanitary District 15 EEC Table 5 ‐6, Z’Tejas Gravity Grease Interceptor Sampling Results Date Time FOG/Solids (%) pH Water Temp. (°F) Dissolved H 2 S (mg/L) Airborne H 2 S (mg/L) Last Pump Date Other 2/21/2012 8:35 14 4.9 93 1 1 2/14/2012 2/27/2012 21:25 20 4.7 83 0 0 2/14/2012 3/8/2012 9:10 38 4.9 90 0 2 2/14/2012 SB contained FF 3/20/2012 21:00 11 5.1 85 0 ‐ 3/13/2012 4/5/2012 9:15 28 5.1 89 2 0 3/13/2012 SB contained FF 5/31/2012 9:30 26 5.6 94.5 2 5 5/11/2012 SB contained FF 6/8/2012 10:20 16 5.5 85.5 1 0 5/11/2012 SB contained FF 6/27/2012 20:25 7 5.3 95 2 0 6/12/2012 SB contained FF 6/29/2012 9:30 32 6.0 87.8 2 0 6/12/2012 SB contained FF 7/10/2012 21:35 51 5.6 90.2 1 0 6/12/2012 SB contained FF Key: °F = degrees Fahrenheit H 2 S = hydrogen sulfide mg/L = milligrams per liter SB = sample box This interceptor is pumped out every 1 to 2 months, which appears to be effective in maintaining compliance with the 25% rule; however, some floating debris/FOG was observed in the sample box, indicating potential pass ‐through to the downstream sewer system (i.e., the Plaza lift station). This apparent pass ‐through was also observed during an inspection conducted by the District prior to application of any additives; therefore, the apparent pass ‐through does not appear to be related to the additive usage. Pumping alone did not appear to have a substantial effect on reducing H 2 S discharged from this interceptor. Figure 5 ‐2, Z’Tejas Sample Box
Grease Interceptor Sulfide Mitigation Study at South Coast Plaza November 5, 2012 W1425.010 Costa Mesa Sanitary District 16 EEC 5.7 Capital Grille / Seasons 52 Based on historical pumping records, the 4,000 ‐gallon grease interceptor serving the Capital Grille and Seasons 52 facilities is pumped once every 2 to 3 months. Based on interceptor core sampling observations, the wastewater from this facility contains similar levels of floating FOG and settable solids. A chemical additive, Golden Bio, has been utilized in this interceptor for sulfide control since early 2011 and was continued throughout this study. During the study, the Golden Bio product was applied to the kitchen wastewater through an automated dispensing system (actual dosing data not made available by the additive supplier), resulting in dissolved H 2 S levels ranging from 0 to 7 mg/L (1.9 mg/L average; Table 5 ‐7, Capital Grille / Seasons 52 Gravity Grease Interceptor Sampling Results ). Occasional low levels of airborne H 2 S were also detected; however, noticeable sulfide odors were not evident immediately after opening the grease interceptor. Table, 5 ‐7, Capital Grille / Seasons 52 Gravity Grease Interceptor Sampling Results Date Time FOG/Solids (%) pH Water Temp. (°F) Dissolved H 2 S (mg/L) Airborne H 2 S (mg/L) Last Pump Date Other 2/21/2012 8:50 14 5.6 83.9 0 0 1/19/2012 2/27/2012 21:35 18 5.7 88.5 2 14 1/19/2012 3/8/2012 9:20 21 5.3 92.7 0 0 1/19/2012 SB contained SS 3/20/2012 21:15 23 4.9 90 1 ‐ 1/19/2012 SB contained SS 4/5/2012 9:00 11 5.8 88 5 3 3/27/2012 5/31/2012 9:45 18 5.7 95.2 2 2 3/27/2012 6/8/2012 10:00 18 5.7 90 0 0 3/27/2012 6/27/2012 20:35 0 ‐ ‐ ‐ 0 6/27/2012 Just pumped, not full 6/29/2012 10:00 5 5.7 94.3 0 0 6/27/2012 7/10/2012 21:45 14 6.0 93 7 8 6/27/2012 Key: °F = degrees Fahrenheit H 2 S = hydrogen sulfide mg/L = milligrams per liter SB = sample box This interceptor is pumped out every 2 to 3 months, which appears to be effective in maintaining compliance with the 25% rule. Pumping alone did not appear to have a substantial effect on reducing H 2 S discharged from this interceptor.
Grease Interceptor Sulfide Mitigation Study at South Coast Plaza November 5, 2012 W1425.010 Costa Mesa Sanitary District 17 EEC 5.8 Summary Following is a summary of the key findings and results from the grease interceptor sampling activities: Left untreated, the wastewater discharge from the Boudin SF, Rainforest Café, Corner Bakery, and Capital Grille / Seasons 52 grease interceptors will continue to be a source of sulfide ‐related issues (odors, corrosion, etc.) in downstream sewer lines and structures, including the Plaza lift station. The Claim Jumper grease interceptor did not appear to be a significant source of dissolved H 2 S throughout this study. While not confirmed, the reason for the low sulfides in the Claim Jumper interceptor is likely due to an apparent high flow rate of kitchen wastewater; the increased flow rate reduces the wastewater retention times within the interceptor. However, this interceptor could become a source of H 2 S in the future if operations change significantly. The Golden Bio product effectively maintained dissolved sulfide levels below 2 mg/L in the Z’Tejas interceptor during this study; however, H 2 S levels were not consistently reduced to below the District limit 0.5 mg/L. Costs for this product in this particular application range from $300 to $325 per month. The Golden Bio product was less effective in consistently maintaining low dissolved sulfide levels in the larger Capital Grille / Seasons 52 interceptor during this study. During half of the sampling events, H 2 S levels were reduced to below the District limit of 0.5 mg/L. However, for the other half of inspection events, the sulfides ranged from 2 to 7 mg/L. Costs for this product in this particular application range from $600 to $675 per month. After a dosage increase to 1.25 gallons per day in the Corner Bakery interceptor, the BioMagic product appeared to effectively reduce dissolved H 2 S levels to below the District limit of 0.5 mg/L. However, this finding is based on only three sampling events due to the limited application of the additive during this study. Costs for the BioMagic product in this particular application range from $265 to $312 per month. The Enviroklean product applied the Marche Moderne interceptor appeared to effectively reduce dissolved H 2 S levels to below the District limit of 0.5 mg/L. However, this finding is based on only three sampling events due to the limited application of the additive during this study. Costs for this product in this particular application range from $300 to $325 per month. Chemical additives were effective in the smaller grease interceptors (1,500 gallons or less) but were inconsistently effective in the larger interceptor. This inconsistency is potentially due to poor mixing or distribution of the additive throughout the large interceptor, particularly during periods of low flow (e.g., when restaurants are closed). Left untreated, the wastewater discharge from the Marche Moderne grease interceptor will continue to be a source of sulfide ‐related issues (odors, corrosion, etc.) in downstream sewer lines and structures.
Grease Interceptor Sulfide Mitigation Study at South Coast Plaza November 5, 2012 W1425.010 Costa Mesa Sanitary District 18 EEC Reducing dissolved sulfides in the wastewater provides a corresponding reduction in airborne H 2 S levels and associated nuisance odors. While several early ‐morning sampling events exhibited airborne H 2 S levels above 10 ppm (following long periods of low wastewater flow), an equal number of evening sampling events also resulted in airborne H 2 S levels above 10 ppm. Elevated sulfide levels were frequently observed shortly after (within days) interceptor pump ‐out, indicating that increased pumping frequency is not likely an effective option for sulfide control. 6.0 RECOMMENDATIONS Based on the findings and results of the study, EEC recommends the following next steps: Consider each of the Golden Bio, BioMagic, and Enviroklean products as options for mitigating dissolved sulfide levels in grease interceptors. The FSE (or responsible party) should select the product, as the FSE is ultimately responsible for compliance with the program requirements. Develop a fact sheet to assist FSEs in discussing/evaluating additive alternative with the vendors/suppliers, including performance measures for vendors to meet and demonstrate to the FSE. Review findings of this study with South Coast Plaza management. Schedule and conduct a stakeholder meeting (group meeting or multiple individual meetings) with the FSEs that have grease interceptor tributaries to the Plaza lift station. Conduct meeting(s) to provide outreach and education pertaining to the ongoing sulfide issues identified in this study. Meeting(s) should include representatives from the District and the Plaza. o District to provide additional information/education on the District’s FOG program. o District to provide information on FSE responsibility to meet dissolved sulfide limitations, District monitoring activities (inspections), and available enforcement actions where noncompliance is identified. o Plaza management staff to encourage implementation of corrective measures to ensure minimal impacts to Plaza tenants and customers. o Plaza management staff to share information on their experiences with chemical additives and provide cost and vendor information for products evaluated during this study. In collaboration with FSEs, discuss and establish a reasonable timeline for implementation of corrective measures; follow ‐up through implementation.
Grease Interceptor Sulfide Mitigation Study at South Coast Plaza November 5, 2012 W1425.010 Costa Mesa Sanitary District 19 EEC Engage vendors of chemical additives to develop alternatives for improving performance in larger grease interceptors (multiple dispensing location, mixing, etc.). Upon implementation of corrective measures, monitor dissolved sulfide levels in grease interceptors to ensure compliance with District regulations.
_____________, 2013 XXX Re: Costa Mesa Sanitary District Discharge Requirements Dear M r . XXX : The Costa Mesa Sanitary District (District) is the owner of the public sewer system serving your business and is responsible for keeping the sewer system functioning properly. In order to protect the sewer system and the District personnel servicing the sy stem , the District has established regulations identifying the specific prohibitions and limitations for the wastewater discharged from each sewer system user . The wastewater flow from your food service establishment sinks, cooking equipment and drains fl ows into a grease interceptor prior to discharging to the sanitary sewer system. Wastewater systems with low flows , such as your grease interceptor, are susceptible to undesirable septic conditions that can lead to generation of hydrogen sulfide (H 2 S ) gases and the associated "rotten egg" odors. Such odors have been historically probl ematic at the South Coast Plaza . Further, when hydrogen sulfide combines with moist warm air it form s into sulfuric acid that deteriorates the concrete and metal surface s in the District’s pumping station located at the plaza. Both the Costa Mesa Sanitary District as the local collection system owner and the Orange County Sanitation District (OCSD) as the regional treatment plant owner have a discharge limit for dissolve d sulfides (H2S) of 0.50 mg/L. When sulfide levels in excess of 0.50 mg/L are detected, the owner/operator of the wastewater system is required to reduce the sulfide level to the allowable discharge limit. Recently, in coordination with South Coast Plaza Management, the District conducted a series of wastewater sampling events at the grease interceptors associated with the District owned wastewater pumping station at the Plaza. This sampling effort identified H 2 S levels in the wastewater discharged from y our grease interceptor to be well above the permitted discharge limit. The District appreciates your efforts to date, which include s routine pumping services for your gre ase interceptor . However, d ue to the corrosion and odor issues associated with H 2 S , the District is req uiring your cooperation in reducing the H 2 S level in the wastewater from your grease interceptor . The District requests immediate implementation of the following preventative measures: o Ensure grease interceptor maintenance includes complete removal (pumping) of all interceptor contents as prescribed in Section 374.5 of the California Penal Code and Division 12.4 of the California Public Resource Code (Assembly Bill No.1333);
XXX CMSD Discharge Requirement March 29, 2013 Page 2 of 2 o Request and ensure thorough cleaning of the interceptor wal ls is included in your grease interceptor service agreement and promptly repair any identified structural problems; o Conduct routine cleaning of the private sewer line(s) between the kitchen and the grease interceptor; o Utilize a wastewater H 2 S treatment additive. Each wastewater/grease interceptor system is different and can require varying approaches to reducing sulfide levels. Depending on the specific conditions of your system, some combination of the above measures may be needed to effecti vely and consistently reduce the H 2 S level to the allowable discharge limit of 0.5 mg/L. F ood service establishments identified with elevated H 2 S issues have requested the use of H 2 S treatment additives to help reduce their H 2 S levels. Based on cursory evaluation of several products performed by South Coast Plaza Management and the District, the following H 2 S treatment additives have demonstrated some level of effectiveness in reducing H 2 S levels. While these products are not endorsed by the District , o ut -of -compliance FSEs using these additives, together with enhanced interceptor maintenance practices, have been successful in reducing their H 2 S to complian t levels. Product Name Intended Use Company Contact Name Company Contact Phone Golden Bio (Golden Bell) H 2 S reduction Murrill Adams 714 -630 -3861 www.goldenbellproducts.com BioMagic H 2 S reduction Scott Schlegel 949 -631 -6159 www.biomagic.com EnviroKlean H 2 S reduction Juan Loeza (909) 855 -2765 Other H 2 S treatment additives may be available to reduce H 2 S levels. Use of additives not listed above must be authorized by the District (Wastewater Additive Use Variance Request form) prior to introduction of the additive into the wastewater system. Upon receipt of this letter, please contact our fats, oils, and grease program consultants, either Jim Kolk or Joseph Jenkins of Environment al Enginee ring & Contracting (EEC) at (714) 667 -2300, to discuss how your restaurant may achieve compliance with the discharge limits described above . If you have any questions regarding this issue or would like to discuss the requirements in more detail, please contact me at (949) 645 -8400 or at scarroll@cmsdca.gov at your earliest convenience. Sincerely, Scott Carroll General Manager C: Rob Hamers, District Engineer Environmental Engineering and Contracting South Coast Plaza Management
South Coast Plaza Bristol Restaurants Contact List And Grease Interceptors Location s 1. Maggianos Kevin Gilbert mg0081gmom@maggianos.com 2. Rainforsest Café Ergun Uslu scpgm@ldry.com 3. McDonald ’s Lucila Moreno 4. Claim Jumper Anna Church achurch@ldry.com 5. Boudin’s Michelle Nguyen café_04 39@boudinbakery.com 6. Z’Tejas Jeffrey Grasso southcoast@ztejas.com 7. Capital Grille & C hris Szechenyl costamesa@tcgdine.com Season ’s 52 Erin Meadows Emeadows@seasons52.com 8. Charlie Palmer Chris Moran cmoran@charliepalmer.com 9. Anqi Edgar Fernandez edgarf@houseofan.com 10. Corner Bakery Mike Zaldivar cb0231@cornerbakerycafe.com 11. Vie De France Francoise Cuzor Francoise.cuzor@vdfy.com 12. Lawry’s Rose Stone rstone@lawrysonline.com 13. Wolfgang Puck Bistro Chris Dawson Christopher.c.dawson @macys.com 14. Champagne Bakery Sergio Camora scpb@champagnebakery.com
Page 2 Contact List 15. Marche Moderne John Steving John.steving @marchemoderne.net 16. Nordstrom Café Robert Evans Robert.evans@nordstrom.com 17. Quat t ro Caffé Dennis Silva info@quattrocaffe.com