Santa Rosa January Your instructors today: Neil Worthen John Hamner
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1 Cross-Connection Controls Santa Rosa January 2016 This document was prepared using funds under Agreement with the California State Water Resources Control Board; the total Agreement is for $3,971,379 and will produce multiple documents WELCOME! Your instructors today: Neil Worthen John Hamner This training is presented by RCAC with funding provided by the CA State Water Resources Control Board Division of Drinking Water (DDW) 1
2 Housekeeping Cell phones = set to STUN Participation = encouraged Restrooms Breaks Lunch Evaluations Certificates for CEU s The Rural Community Assistance Partnership RCAC 4 2
3 RCAC Programs Affordable housing Community facilities Water and wastewater infrastructure financing (Loan Fund) Classroom and online training On-site technical assistance Median Household Income (MHI) surveys What is Capacity Development? Acquiring and maintaining technical, managerial and financial capabilities (TMF) to consistently provide safe drinking water TMF assessment process Mandatory New systems Mandatory Change of ownership Mandatory - To obtain SRF funding Optional Enforcement action (DPH or LPA) 3
4 The 13 TMF Elements TECHNICAL ELEMENTS Consolidation Feasibility System Description Certified Operators Source Capacity Operations Plan Training The 13 TMF Elements MANAGERIAL ELEMENTS Ownership Water Rights Organization Emergency Response Plan (ERP) Policies 4
5 The 13 TMF Elements FINANCIAL ELEMENTS Budget/Capital Improvement Plan Budget Controls Where To Find Answers George Faggella, Drinking Water Capacity Development Coordinator 916/ Division of Drinking Water District offices Your Local Primacy Agency (LPA) SWRCB Drinking Water Program web site: 5
6 Scroll Down LINKS TO RESOURCES 12 6
7 Performance Assessment Rating Tool (PART) 4 to 6 weeks from today w/ today s workshop in subject line 3 questions 3 minutes maximum How did you use the information that was presented today? Funders are looking for positive changes Help us continue these free workshops! Questions / Discussion 7
8 Time For An Opener! 8
9 What is a Cross Connection? Any physical connection to a public water supply through which a contaminant (non-potable liquid, solid or gas) could enter the system by backflow 9
10 Typical Cross-Connections Water softener drain line patched into a building sewer 19 Typical Cross-Connections Ice machine drain line patched into a sink drain 20 10
11 Typical Cross-Connections Improperly plumbed toilet rinse line 21 Typical Cross-Connections Beauty parlor hair rinse sink 22 11
12 Typical Cross-Connections Hospital bed pan washing station (yep, you heard it right!) 23 Typical Cross-Connections Garden hose connected to swimming pool recirculation line 24 12
13 Typical Cross-Connections Hoses connected to janitor sinks for mop pails 25 Typical Cross-Connections Rinse lines and drain lines from an embalming table at a funeral home! 26 13
14 Any Problem Here? Motorized Carbonator 14
15 Soap Dispenser Cross-Connections 15
16 16
17 What is a Cross Connection? Contaminants can enter the potable water system in either of two ways: - Backsiphonage - Backpressure Backsiphonage When pressure is lost in distribution system a siphon condition can occur Broken water line High hydrant flows High water demand 17
18 Backsiphonage Backpressure Conditions that produce higher pressure than that in the public water system Storage tanks at higher elevation Auxiliary pumping facilities 18
19 Back Pressure Example Private Well Back Pressure 100 PSI 70 PSI Plumbing Cross Connections Actual or potential connections between a potable and non-potable water supply Serious public health hazard Have resulted in contamination of drinking water and spread of disease 19
20 Why You Need A Cross Connection Control (CCC) Program Protect the health of your consumers! Microbiological contaminants that cause cholera, typhoid, giardiasis or cryptosporidiosis Chemical contaminants that cause effects based on type, amount and duration of exposure Physical hazards (compressed air, gas, hot water and steam) cause injuries or death Backflow Prevention Backflow can be prevented Air Gap Mechanical device or assembly Selection is based on Application and design Degree of hazard Approval requirements 20
21 Air Gap Mechanical Devices Residential Meter Check / Single-Check Valve (CV) Dual-Check Backflow Preventer (DCV) Dual-Check with Atmospheric Vent (DCAV) Hose Bibb Vacuum Breaker (HBVB) Atmospheric Vacuum Breaker (AVB) 21
22 Simple Devices DCV HBVB AVB 22
23 Mechanical Assemblies Pressure Vacuum Breaker Assembly (PVBA) Double-Check Valve Assembly (DCVA) Double-Check Detector Assembly (DCDA) Reduced-Pressure Backflow Assembly (RPBA) Reduced-Pressure Detector Assembly (RPDA) PVBA 23
24 DCVA RPBA or RPZ 24
25 DCDA Similar to DCVA and RPBA, but includes bypass with meter Questions / Discussion 25
26 Exercise... What Are Your High Risk Customers? General Installation Guide Common Backflow Prevention Devices Approved Backflow Preventer Type Degree of Health Hazard Backflow Conditions High Low Backsiphonage Backpressure AG Yes Yes Yes Yes RPBA/RPDA Yes Yes Yes Yes DCVA/DCDA No Yes Yes Yes USC Foundation for Cross Connection Control and Hydraulic Research List of Approved Assemblies 26
27 Cross-Connection Programs All public water systems should have crossconnection control programs Do not rely on federal, state or local statutes Enforcement usually accomplished via ordinances, resolutions etc. CCC Programs Step 1: Establishment of legal authority and program policies Adopt a Cross Connection Control ordinance Step 2: Evaluate service connections for crossconnection hazards Survey existing customers Establish new connection policy Establish schedule for reassessment 27
28 3. Elimination And/Or Control Of Cross Connections Develop and implement procedures to ensure that: Cross connections are eliminated whenever possible Cross connections are controlled by installation of approved devices commensurate with the degree of hazard Approved devices are tested annually 28
29 Determine Type of Program Premise isolation Fixture isolation Combination of both Purveyor Owned Assembly UPC Fixture Protection 29
30 Customer Owned Assembly UPC Fixture Protection CCC Program Content (cont) 4. Provision of qualified personnel Evaluate time and training requirements 5. Inspection and testing of backflow preventers Written procedures for inspection and testing 6. Quality control of testing process 7. Response to backflow incidents Establish backflow incident response plan 30
31 Certifications Cross Connection Control Specialist CDPH definition: a person certified as a crossconnection control program specialist by the CA- NV section of AWWA or an organization with equivalent requirements Backflow Prevention Assembly Tester 8. Public Education For Consumers Residential Mailers Bill stuffers Consumer confidence reports Commercial / Institutional / Industrial How will you reach them? 31
32 9. Record Keeping Record keeping for CCC program Master list of service connections Surveyed response Hazard assessment Device installation, inspection and testing 32
33 CA Regulations CA Title requires a water supplier to implement a CCCP that addresses Adopt operating rules or ordinances to implement the program Conduct surveys of premises to identify hazards Provisions of backflow protection Provision of a person trained in cross connection control Maintenance of records of locations, tests and repairs of devices Exercise... You're The Inspector! How Would You Fix it? 33
34 A Few Case Studies... Port of Sacramento Soft Drink Bottling Plant Located About 2 Miles From The Port Facilities (Note the backflow device) 34
35 Conveyor Belt at Port Facilities Schematic of Grain Handling Facilities Any Problem Here? 35
36 What Can We Learn From This Event? There may be many installed devices, but not necessarily in the right places The cost of an event can be enormous (embargoed and destroyed soft drinks were worth millions of $$) Undetected events may be occurring without obvious signs Re-inspections of older, existing facilities is essential (CCC is not like a building code!) 36
37 Caltrans I-5 Rest Stop, Red Bluff Southbound (Routine Annual Inspection ) Caltrans I-5 Rest Stop, Red Bluff Southbound (Routine Annual Inspection ) 37
38 Caltrans I-5 Rest Stop, Red Bluff Southbound (Routine Annual Inspection ) Caltrans I-5 Rest Stop After Modifications 38
39 Colusa High School Colusa High School
40 Colusa High School Flow-through Situations Flow through condition in piping that is neither owned or controlled by the water utility More than one service connection to the same customer Case study: Lime Saddle Estates MHP Butte County 40
41 Lime Saddle Estates MHP Any cause for concern? 41
42 Connecticut, 1982 Propane gas in water mains Hundreds evacuated Explosions 90 psi forced 2,000 cubic feet of gas into the water mains 42
43 In Closing.. Know your system and the possible contamination risks! Train your staff to recognize cross connections! Have a cross connection program and use it! Seek advice from experts in the field, i.e. RCAC and others Questions / Discussion 43
44 44
45 45
46 Thank You For Attending! Neil Worthen John Hamner 46
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