Municipal Maintenance s1

MUNICIPAL MAINTENANCE MUNICIPAL MAINTENANCE

QUALITATIVE RESULTS

Municipality: City of Antioch Permit Year: (2007/2008)

Introduction:

The goal of Municipal Maintenance is to optimize pollutant removal from the municipal storm sewer system and watercourses during routine maintenance activities and to prevent or minimize discharges to storm drains and watercourses from road maintenance, parks, corporation yards, and other publicly owned facilities and activities. This is accomplished through various best management practices (BMPs) including street sweeping; debris removal and cleaning of catch basins, trash racks, and other municipal structures; integrated pest management (IPM); channel maintenance; and on- going employee training and education.

There are approximately 120 people in the Public Works Department and, in some aspect, each of them are responsible for implementing the Municipal Maintenance Performance Standards. The principal contact for all Municipal Maintenance activities related to permit compliance is Phil Hoffmeister, Administrative Analyst – (925) 779- 7035.

Implementation & Evaluation:

Street Cleaning and Routine Inspection and Cleaning performance standards continue to be the most effective in preventing, removing, and reducing pollutants from entering the storm water system. The following is the estimated amount of pollutants removed for street sweeping and storm facilities cleaning combined: copper: 452 lbs., lead: 336 lbs., nickel: 108 lbs., zinc: 1,205 lbs., total petroleum hydrocarbons: 11,112 lbs., and oil & grease: 24,267 lbs. These performance standards were responsible for removing an estimated 2,870 cubic yards of pollutants from City streets by sweeping them up before they entered the storm drain system, and removing approximately 1,610 cubic yards of pollutants from publicly owned storm facilities. Collected material from both street sweeping and publicly owned storm facilities is staged at the City’s former sewer treatment plant off Fulton Shipyard Rd. The material is then removed by Allied Waste, Inc. and disposed at their facilities.

In 2007/2008, approximately 10,670 curb miles of City streets were swept. As a result, an estimated 2,870 cubic yards of debris was removed. Based on that total amount of debris removed during sweeping, the following amounts of specific pollutants were removed: 0.10 lbs. of PCBs; 0.19 lbs. of mercury; 361 lbs. of copper; 131 lbs. of lead; 108 lbs. of nickel; 575 lbs. of zinc; 7,028 lbs. of total petroleum hydrocarbons; and 15,334 lbs. of oil and grease. Those values are calculated from the conclusions of a street sweeping survey conducted by the Contra Costa Clean Water Program in

MUNI - 1 reporting year 2006-07. As a result, TCVs have been revised; therefore, establishing trends at this time cannot be completely accurate. However, as compared to last year’s TCV values, it appears that the amount of removed material has increased slightly. As long as the TCV methodology remains constant, future TCVs shall be compared to this year’s. For more information on the Street Sweeping Survey, please see Volume I, Section 5 of the Program Report.

Residential neighborhood streets are swept once a month, while major arterials and streets with above average traffic are swept twice a month or once a week. Street sweeping schedules are available to residents upon request (the schedule for this activity has not changed from the previous reporting year. For a copy of the street sweeping schedule please see last year’s report). The map/schedule is also available for download at the City website at: http://www.ci.antioch.ca.us/CityGov/PublicWorks/. Street sweeping activities and scheduling appear to be effective in removing debris; however, the largest problem that prevents complete sweeping activities is obstructions. Most obstructions are parked cars but other things like trailers, construction zones and barriers, and temporary road signs, also contribute to the problem. Notices have been sent out reminding residents and construction crews of the street sweeping schedule in their area and to keep the street clear during those days. In addition, residential streets that have a more frequent sweeping schedule, for example L Street, have been posted with permanent “No Parking” signs for a certain time of sweeping. Additional efforts for having residential streets cleared are being explored in the City of Antioch Illegal Dumping Committee (see IDCA section). Industrial and commercial areas are vacant during early morning hours and thus did not need signs. Given the amount of material that is being removed during street sweeping, implementation of the street sweeping performance standards appear to be effective.

There are approximately 6,838 catch basins in the City of Antioch. In 2007/08, a total of 832 catch basins were inspected and cleaned. Other infrastructure that was inspected and cleaned include 16 culverts, 14.4 miles of V-ditches, 8.9 miles of constructed channels, 25 miles of natural watercourses, and 4 trash racks. As a result, an estimated total 1,610 cubic yards of debris was removed from those infrastructures. Based on that total amount, the following amounts of specific pollutants were removed: 91 lbs. of copper; 205 lbs. of lead; 630 lbs. of zinc; 4,084 lbs. of total petroleum hydrocarbons; and 8,933 lbs. of oil & grease. As noted in the street sweeping results, these TCVs cannot be directly compared to last year’s. Future years will be compared to these results. Routine cleaning and maintenance of storm facilities appear to be effective.

Litter prevention is recognized as an integral part in reducing a diversion of City resources. The solid waste and storm water programs have combined efforts to inform everyone of the importance of properly disposing trash (see PEIO section of this annual report for specific types and numbers of items distributed). Maintenance crews are constantly removing trash from public areas. A total of approximately 6,485 tons (4,000 cubic yards) of material was collected and disposed from City litter receptacles this past year.

Selected areas of creek channels are maintained by the City, while County Flood Control maintains the remaining creek areas. In some of those City-maintained areas,

MUNI - 2 overgrowth has occurred and mechanical harvesting and manual labor is performed. Control of growth is maintained in those reclaimed areas by spraying of some herbicides. However, mixing of product is done so that plants are not killed; rather, only the growth is slowed (usually <1.5% solution). The active herbicide ingredient used is glysophate. This approach is effective at controlling growth while preserving the life of the plant, and at the same time, reduces the amount of herbicides applied from what potentially could be used. The City of Antioch has a General NPDES permit for Aquatic Pesticide Applications, and was granted a Statewide Implementation Plan (SIP) exception for copper-based applications at the City-owned and operated reservoir. The City of Antioch continues to participate in the Regional Pesticide Monitoring Program (RPMP) for the application of aquatic pesticides. The RPMP consists of the Contra Costa County Public Works, Alameda County Public Works, Zone 7-Alameda County Flood Control and Water Conservation District, and the City of Walnut Creek. A separate annual report for Aquatic Pesticides is submitted separately to this MS4 annual report.

When graffiti is determined to be a public nuisance, it is evaluated for the appropriate removal method. Three options are available for removal; those are: 1) No action, 2) Paint over to match existing surface, or 3) Complete removal and repaint. In all cases, weather and wind speed and direction are taken into consideration. If it is too windy or rain is forecast, work is rescheduled to reduce the likelihood of drift. In cases of complete removal, the area is covered with drop cloths, the closest storm drain inlets protected, and the paint is sandblasted. The particles are collected with a wet/dry vacuum or transferred into a refuse receptacle. The surface is resurfaced, if needed, and then repainted. The debris is then brought back to the maintenance yard and properly disposed. Contractors doing major work on behalf of the City contain suitable clauses regarding practices to diminish the risk of storm water contamination such as keeping the work area clean, use of drop cloths, drain inlet protection, and proper disposal of residual materials.

Road repair and maintenance is a seasonal activity. Most of the repair and maintenance work is scheduled from spring to fall. As such, work is not performed during rainy weather and thus reduces the chance of run-off. When inclement weather is forecasted, repair activities are rescheduled if possible. If repair activities cannot be rescheduled, proper storm water precautions are taken. Whenever possible, catch basin inlets are completely covered during road work to prevent any debris or fluids from entering the storm drain system. If the catch basins cannot be completely covered, diaper bags, baffles, and gravel bags are placed in and around the inlet(s). During concrete and asphalt cutting activities, a minimal amount of water usage is preferred. Cuttings are removed using a wet/dry vacuum and disposed properly.

As presented in the Storm Water Pollution Prevention Plan for the Maintenance Services Center, the primary person responsible for implementing municipal maintenance facilities BMPs is the Director of Public Works. Annual facility inspections are performed by the NPDES Compliance Manager. General BMPs continue to be implemented by doing the following:

1) All trash enclosures and dumpsters be covered and protected from roof and surface drainage;

MUNI - 3 2) All areas used for washing, pressure washing, maintenance, repair, or processing shall have impermeable surfaces and containment berms, roof covers, and discharge into the sanitary sewer;

3) Fuel dispensing areas must be on impermeable surfaces extending 10 to 12 feet beyond the actual dispensing area and covered. The dispensing area must have a spill cleanup plan, routine cleaning near dispensers, and routine inspections of equipment for proper functioning and leak prevention;

4) Oils, fuels, solvents, coolants, and other chemicals stored outdoors must be in containers and protected from drainage by secondary containment structures such as double walled tanks;

5) Efficient irrigation, appropriate landscape design and proper maintenance be implemented to reduce excess irrigation runoff, promote surface filtration, and minimize use of fertilizers, herbicides, and pesticides;

6) To the extent practicable, drainage from paved surfaces shall be routed through grassy swales, buffer strips or sand filters prior to discharge to the storm drain system;

7) A parking lot sweeping program be implemented that, at a minimum, provides for sweeping immediately prior to, and once during, the storm season; and

8) All storm drain inlets within the project site be labeled by stenciling, branding or plaques reading "No Dumping - Drains to River".

The Vehicle Maintenance Facility is covered by a General Industrial Activity NPDES permit and is operated under a separate SWPPP. Employees are trained in proper operating and maintenance procedures. Contents of the facility safety manual and SWPPP are reviewed, as are employee health and safety issues. All employees have access to the Facility Safety Manual and Storm Water Pollution Prevention Plan. All vehicles are washed in the vehicle wash rack. The drain for the wash rack is connected to an oil/water separator and sanitary sewer system.

The City of Antioch operates a municipal golf course. BMP information has been provided which covers alternative fertilizers, pesticides, herbicides, water conservation, and recycling. The golf course pilot study was performed by the Contra Costa Clean Water Program through the Watershed Assessment and Monitoring sub-committee. The study concluded that no impacts to surface water could be determined from either traditional or organic fertilizers as long as proper BMPs were followed. Some examples include, maintaining proper grass height, applying fertilizer according to manufacturer specifications, applying at appropriate times (weather), and proper irrigation. Those results have been forwarded to all golf course operators within Contra Costa County.

MUNI - 4 Water is pumped from the City’s intake at the San Joaquin River and/or purchased from the Contra Costa Water District and stored in the municipal reservoir. When consumption exceeds normal supply, the City uses that stored water to offset the impact. The City applies copper sulfate at its municipal water supply reservoir to control algal blooms. A total of 900 lbs of copper sulfate were used last year and 45 gallons of cutrine. Compared to last year, that is an increase of 600 of copper sulfate and 30 gallons of cutrine. Through the RPMP, the City continues to investigate alternatives to copper-based algaecides and in FY 2006-07 the City installed three (3) Solar Bees (model SB10000v12PW) at the municipal reservoir. These were installed to help minimize the formation of Blue-Green algae. Solar Bees operate on solar power and work pump water to help circulation which in turn keep Blue Green algae in check. The models used at the reservoir operate 24 hours a day and can circulate 10,000 gal/min. Some applications of copper sulfate and cutrine are still needed during massive algal blooms. However, the installation of the Solar Bees has reduced the amount of copper needed. Prior to installation, in FY 2005-06, 1,400 lbs of CuSO4 and 45 gallons of cutrine were applied. More information on the Solar Bee can be seen at www.solarbee.com.

The City of Antioch does not use any pesticides containing diazinon. As an alternative to using pesticides to control aphid populations, approximately 40,000 ladybugs were released at various park facilities.

A total of 26 City public works employees attended 2 Clean Water Program sponsored workshops and/or training seminars. Over 100 public works employees took part in outside agency training.

When practicable, the City uses the “bait and trap” method rather than spray applications. This approach helps reduce overspray and potential run-off of pesticides. Native plant species and drought tolerant vegetation are preferred when designing proposed vegetated medians, roadside landscaping, and parks.

Modifications:

Based on the effectiveness of the MUNI PSs, no modifications appear to be needed at this time.

MUNI - 5 Fiscal Year 2007/2008 Goals:

The City will continue to effectively prevent, remove, and reduce pollutants by complying with all applicable Municipal Maintenance performance standards. Street sweeping schedules and locations will continue to be evaluated to ensure effectiveness, and facility BMPs will continue to be evaluated as well. IPM will also continue to be implemented as well as employee training and updates.

MUNI - 6 MUNICIPAL MAINTENANCE – QUANTITATIVE RESULTS

Industrial Commercial Residential Description Areas Areas Areas Total

Street Sweeping

Total number of curb miles within Agency’s 59 75 480 614 jurisdiction

Number of curb miles swept 1025 1303 8341 10669

Total volume of material removed through 276 351 2244 2670 sweeping (cubic yards)

Preliminary Estimated Mass (Dry Weight) of Constituents Removed by Street Sweeping

Total PCBs (lbs) .10

Total Mercury (lbs) .19

Total Copper (lbs) 360.99

Total Lead (lbs) 130.98

Total Nickel (lbs) 108.62

Total Zinc (lbs) 575.03

Total Petroleum Hydrocarbons (lbs) 7028.20

Total Oil and Grease (lbs) 15334.25

Publicly Owned Storm Drain Facilities

Total Number of Storm Drain Facilities

Inlets 619 785 5434 6838

Culverts (miles) 0 0 0.23 0.23

V-Ditches/Roadside Ditches (miles) 0 0 34.0 34.0

Pump Stations N/A N/A N/A N/A

MUNI - 7 Industrial Commercial Residential Description Areas Areas Areas Total

Constructed Channels (1) (miles) 0.95 0.95 7.6 8.9

Natural Watercourses (2) (miles) .9 1.7 22.4 25.0

Trash Racks 0 0 4 4

Number of Storm Drain Facilities Inspected/Cleaned

Inlets 10 138 684 832

Number of Storm Drain Inlets requiring 0 40 25 65 more frequent cleaning

Culverts 0 0 16 16

V-Ditches/roadside ditches (miles) 0 0 14.4 14.4

Pump stations N/A N/A N/A N/A

Number of Pump Station Maintenance N/A N/A N/A N/A inspections

Constructed Channels (1) (miles) 0.95 0.95 7.6 8.9

Natural Watercourses (2) (miles) 0.9 1.7 22.4 25.0

Trash racks 0 0 4 4

Number of Illegal Dumping Hot Spots 0 2 0 2 identified during Routine Inspections

Volume of Material Removed from Storm Drain Facility Cleaning (cubic yards)

Inlets 2.0 21.0 82.0 105

Culverts 0 0 12.0 12.0

V-Ditches/roadside ditches 0 9. 0 10. 465 465

Pump stations N/A 13. N/A 14. N/A N/A

Constructed Channels (1) 16. 23 17. 288 18. 557 868

Natural Watercourses (2) 8 57 87 152

Trash racks 20. 0 0 8.7 8.7

Preliminary Estimated Mass (Dry Weight) of Constituents Removed by Storm Drain Facility Cleaning

Total Copper (lbs) 3.5 22.67 65.03 91.2

Total Lead (lbs) 4.31 52.38 148.41 205.1

Total Zinc (lbs) N/A 283.58 346.85 630.43

Total Petroleum Hydrocarbons (lbs) 81.57 1518.13 2484.66 4084.36

Total Oil and Grease (lbs) 158.32 1824.38 6950.38 8933.08

Miscellaneous Municipal Activities

Number of Municipal Maintenance Facility Inlets Stenciled/Marked with the “No Dumping” 0 0 0 0a Message

Number of Municipal Maintenance Facility 964 Inspections for Leaky Vehicles and Equipment

Total Volume of Material Collected from Litter 4000 Receptacles

Pesticide/Herbicide Use

Total quantity of pesticides/herbicides 16141 16141 applied (lbs)

Total quantity of pesticides/herbicides 126 389 540 applied (gallons)

Total quantity of pesticides/herbicides applied with copper as an active ingredient 900 (lbs)

a New residential subdivisions and commercial projects are responsible for installing stencils. Municipal staff replaced all reported failing stencils 2 years ago with new buttons. For a detail of the button, please see the MUNI section 2005-06 permit reporting year annual report.

Total quantity of pesticides/herbicides applied with copper as an active ingredient 45 (gallons)

Total quantity of pesticides/herbicides applied with diazinon as an active ingredient 0 (lbs)

Total quantity of pesticides/herbicides applied with diazinon as an active ingredient 0 (gallons)

Fertilizer Use

Total amount of fertilizer applied (lbs) 168,000 168,000

Total amount of fertilizer applied (gallons) 4 4

Number of Employees Attending Municipal Maintenance Training/Workshops

Municipal training/workshops 129

Program training/workshops 26

(1) Constructed Channels – A constructed channel means a constructed pathway for conveying stormwater runoff. The constructed channel may be earthen, rock or concrete lined. It is differentiated from a “v-ditch” in so much as it has a defined bed.

(2) Natural Watercourses – A natural watercourse means a natural pathway for conveying stormwater runoff within defined bed and banks.

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