Abbotsford MEMORANDUM

Transcription

1 Abbotsford t by; IMission Water & Sewer Services MEMORANDUM To: From: Abbotsford/Mission Water & Sewer Commission (WSC) Rick Bomhof, Director of Engineering & Public Works Date: October 2, 2006 Subject: File: Sewage Source Control in Mission INF.WAT.WSC JAMES Treatment Plant Report No.: UMC UTILITY MANAGEMENT COMMITTEE fumc) RECOMMENDATION THAT Report No. UMC (Sewage Source Control in Mission). dated October 2, from R. Bomhol, Director 01 Engineering & Public Works, be received for information. BACKGROUND A question was asked by the Water & Sewer Commission whether sewer sampling should take place in Mission. Without the guidance of a source control program it was decided to take a series of samples at MissIon's largest industrial user located on Mission Way. One sample was taken in July and a second in September of A third sample will be taken in October. Abbotsford completes weekly BOD & SS samples at its industrial processing plants such as fruit & vegetable processors, cheese plant and poultry plants. This program is funded by the WSC and carried out using City resources. MiSSion does not have any of this type of industry connected to the sewer system. Sampling for metals or other contaminants are done occasionally if the City suspects a problem and on a complaint basis. DISCUSSION The results of the Mission Way samples are attached. Based on the sample results the sewage effluent from this site meets the maximum acceptable limit in municipal sewer bylaw. One additional sample will be taken this month to provide a higher confidence level that the effluent consistently meets the requirements. Attached is a memo from the District of Mission's Superintendent of Utilities noting the lack of established guidelines, issues under the current sampling criteria, differences in municipal bylaws and items to consider with a source control program. Outside of Abbotsford's weekly BOD & SS sampling of major indusbial producers there is not a coordinated source control program for the four jurisdictions contributing to JAMES. 10

2 UMC Report No, Page Attached is the executive summary of the wastewater source control publication by the Canadian Infraguide, It is suggested that a joint source control program be developed using'this guideline, ~ Rick Bomhof Director of E i eering & Public Works 11 Page 2 of2

3 Sewage Source Control Program Grab Sampling Interwrap Operation Compound Maximum ~esults ~esults Results Units Acceptable JuI20,2006 Sap 21,2006 Oct 71,2006 Aggregate Organic Constituents Biochemical Oxygen Demand 5 Day mgtl Phenol mgtl Inorganclc Nonmetallic Parameters Sulfide mgtl <0.005 <0.005 Cyanide mgtl Metals Total Calcium mgtl No Standard Iron mgll Magnesium mgll No Standard Manganese mg~ 5 <0.005 <0.005 Potassium mg~ No Standard Silicon mgtl No Standard Sodium mg~ No Standard Sulfur mgtl No Standard 0,7 0,8 Mercury mgtl 0.05 <0,0001 <0,0001 Aluminum mgtl Antimony mgtl No Standard <0,0002 <0,0002 Arsenic mgtl 1 0,0003 0,0003 Barium mgtl No Standard Beryllium mgtl No Standard <0,0001 <0,0001 Bismuth mgtl No Standard < < Boron mgtl 50 0,01 0,014 Cadmium mgtl 0.2 < <0,00001 Chormium mgtl 4 0,0006 < Cobalt mg/l 5 0,0001 <0,0001 Copper mgtl 2 0,033 0,054 Lead mgtl Lithium mgtl No Standard <0,001 <0,001 Molybdenum mgtl 1 <0,001 <0.001 Nickel mgll <0,0005 Selenium mgtl No Standard < <0,0002 Sliver mgll 1 <0,0001 < Strontium mgll No Standard 0,01 0,01 Thallium mg~ No Standard < <0,00005 Tin mgtl No Standard <0.001 <0.001 Titanium mgll No Standard 0, Uranium mgll No Standard < <0,0005 Vanadium mg~ No Standard 0,0006 0,0005 Zinc mga 3 0, Zirconium mg~ No Standard <0,001 <0.001 Physical and Aggregate Properties Total Suspended Solids mgtl Routine Water ph ph >5.5 & 9.5< ,74 Sulfate (S04) mgtl Chlorinated Phenols - Water Monochlorophenols ug/l 50 <.:0,1 <0,1 Dichlorophenols ugtl 50 <0.1 <0.1 Trichlorophenols ugtl 50 <0.1 <0.1 Tetrachlorophenols ug/l 50 <.:0.1 <0.1 Pentachlomphenols ugll 50 <0.1 <0.1 2,4,6 - Trlbromophenol % No Standard G;If>WORKSIUTlLITYISewer Sampl" R8sulls.xl~ 12 1;23PM 10JV2006

4 [hf/fir! ~f A1LfJion Memo File Category: File Folder To From: Oat.: Subject: Director of Engineering and Public Works Superintendent of Utilities Oct 2,2000 Sewage Source Control Program Backgl"ound In response to discussions at the Joint Abbotsford Mission Water and Sewer Commission (WSC) on the current status of the District of Mission sewage source control program, the following is advised: a) The District does not currently have a sewage source control program. b) The District has not carried out any grab samples from industrial operations to determine if any extra strength charges or prohibited waste are being disposed of to the sewer system. c) The District in the past, based on the nature of the industrial operations in Mission, felt it was unhkeiy there are industrial operations. which would merit extra strength charges. Source Control Program The following highlights a number of issues related to the implementation of a sewage source control program in Mission: 1, Currently there are no established guidelines on which industrial or commercial operations should be sampled. The WSC has no guidelines, which CQuid be used as a basis for sampling. 2. There is a variety of different sampling criteria being used by the four contributors to JAMES Plant: a. The City of Abbotsford, staff use their own judgment based on the type of Industry or business operation, flow volumes etc. b. The City of Sumas samples extensively the one industry, which contributes to the approximately 50% of their waste water. They also once a month, take. grab sample from their main sewage wet well. c. The Township of Langley (Aldergrove) does sampling based on flushing staff observations while cleaning sewers. d. The District of Mission does no sampling. 3. There are differences in the Sewer Bylaws between Mission and Abbotsford, which make a sampling program more practical in Abbotsford. Some of the key advantages in Ihe Abbotsford Bylaw: a. Section on grab and composite sampling and the requirement for industry to pay for composite samplers, if grab samples show high concentrations. b. Section requiring sampling chamber where each industry connects to the sewer system. c. Section requiring a flow meter where water meter IS not available or not representative. d. Schedule for high volume rates regardless of content. PAGE 1 OF2 13

5 e. Specific list of concentrations wflich if exceeded constime a violation. 4. There currently is only one large industrial user of water, Darco Developments or I"terwrap a bag and plastics manufacture at approximately 335 cubic meters per day. All other industries are below 20 cubic meters per day. My understanding is Interwrap's primary use of the water is for cooling. Recommendations If the Water & Sewer CommiSSion (WSC) wishes to undertake a more thorough source control program the following are some points to consider: 1. We carry out grab samples from the sewage discharge of Interwrap industrial operation at least one sample every 6 months in subsequent years to maintain a history. 2. That the WSC establish guidelines or adopt a bylaw establishing standards for unacceptable and extra strength discharges to all sewers, which must also be implemented in contributing municipality's i.e. Mission, Langley & Sumas. As part of the guidelines sampling criteria be established identifying which operations should be sampled and how frequent. The guidelines or bylaw could also establish rates for the disoharges of high volumes discharged to sewers similar to the City of Abbotsford and set out industry requirements such as provision of sampling manholes and composite samplers, 3. To maintain consistency, within each of the contributing municipality's, that the WSC allocate sufficient resources to track, sample and monitor effluent discharges within each I'm i' ality. Ii: ~ ~~~iles \N'I.lI'""'" S~~RINT NDENT OF UTILITIES FILE PAGE20F2 14

6 wastewater SOurce Control Executive Summary EXECUTIVE SUMMARY This best practk.e describes the implementation of a wastewater source control program. It is part of the National Guide to Sustai/table Municipal Infrastructure: innovations and Best Practices. This best practice, together with others developed in the Guide. will provide a road map to the best available methods for addressing municipal infrastructure issues. Sewer systems have been used historically to collect liquid wastes and to convey them to receiving waters. Over the past 75 years, as receiving waters became noticeably polluted, municipalities started providing wastewater treatment to protect the health of the public and the aquatic environment. The level of treatment provided is linked to the effluent discharge criteria imposed by regulating authorities. The efficiency of the treatment and its costs are closely related to the quantity and quality of lhe wastewater to be treated. Source control is therefore recognized as an economical and sustainable means of managing wastewater treatment. More stringent effluent discharge criteria and management of biosolids generated by the treatment process are two elements that make source control an essential tool for sound infrastructure management. The main objectives of a wastewater source control program are: to manage the demand for service through user rates and cost allocation, thereby delaying infrastructure expansions or upgrades; to protect sewer workers and the public from discharges to the sewers of materials that are toxic. flammable, or explosive; to protect the sewer infrastructure from corrosive materials, such a."i acids, or from materials, such as sand, rocks, and grease, that can clog the sewer system and lead to sewer backups; to protect wastewater treatment processes from substances or conditions which may upset the treatment processes and generate poor quality discharge and effluent permit violations; to protect the environment from substances such as toxic organics or toxic trace metals which cannot be removed teclmically or economically by the treatment processes; and to improve the quality of bios 01 ids to enhance their recycling into fertilizers, soil improvement materials, and compost. To meet these objectives. a wastewater source control program may include all or some of the following elements: Maroh

7 ExecUtive Summary National Guide 10 Sustainable Munlclpallnfrastructure a sewer-use by-law to regulate what can or cannot be discharged into sewers, and define monitoring and sampling, compliance, enforcement, fines for violation. and rates for additional services; clearly defined mooitoring, enforcement and compliance programs; educational and awareness programs for the public and residential users to promote wastewater reduction through water conservation, replacement of hazardous products by more environmentally friendly substances, reduction of hazardous products used, and recycling of these materials; similar programs can also be developed for industrial, commercial, and institutional users; codes of practice or best management plans to address issues related to some trades or businesses that define specific requirements, such as the installation of pretreatment equipment (e.g., grease interceptors in restaurants and food processing facilities); wastewater rates to promote a user-pay approach and reduce hydraulic and pollutant loading to the wastewater treatment facilities; and pollution preven~ion plans to control or eliminate pollutants before they are discharged to the sewer system. It is a good practice for all municipalities to have a wastewater source control program to meet these objectives, The sewer~\ise by~law is the basic element of a source control program, The by-law must be adapted within the context of the municipality and tailored to the type, size, and number of industrial and commercial activities. Review of the by-law should be done on a regular basis to integrate new parameters that might affect quality of effluent or biosolid at the treatment plant. In jurisdictions where a wastewater treatment plant serves more than one municipality, an all-encompassing sewer-use by-law should regulate discharges into the common system from all municipalities, Appropriate regulatory and enforcement powers must be given to the agency cbarged with enforcing the by-law requirements. Other elements of a wastewater source control program should be developed and implemented based on specific conditions and the needs of each municipality. Source control activities, such as monitoring, can be costly and cumbersome for sewer users and the municipality. A proper adjustment of such activities according to the size and context of the municipality is very important. Educational and awareness programs often produce results in the medium to long term. In the short term, pollutant reduction targets based on voluntary approaches should be realistic and not overly optimistic. Complementary programs must accompany the wastewater source control program to ensure that problems associated with the pollutant') of concern are not just moved from one medium to another, For instance, ha.zardous waste collection should he in place, to avoid shifting problems to the landfill site,, M,nch