Archive

Posts Tagged ‘Raymore’

Environment Canada increases the pressure to prevent pollution of waterways

March 30, 2012 Leave a comment

Wastewater producers are required by Environment Canada directives to treat their wastewater effluent to the standards cited by Section 36.(3) of the Fisheries Act. The Act simply states that no one has the right to deposit, or permit to deposit, a deleterious substance of any type in water frequented by fish.Environmental Effects

Effluent from most wastewater treatment plants meets this standard but what about wastewater from sewer pipes that leak?

Up to 3,700 illnesses annually are due to exposure to recreational water contaminated by sanitary sewage overflows. In 1989, sanitary sewer overflows in Cabool, Missouri contaminated drinking water distribution lines causing 243 cases of reported diarrhea and 4 deaths. (EPA)

Most people are aware of the fact that when there is widespread flooding, such as in New Orleans during Hurricane Katrina, there is an immediate risk of diseases such as cholera, tetanus, typhoid etc. What many people are not aware of is that there are over 75,000 sanitary sewer leaks or overflows per annum in the USA alone. These are potential sources of these same diseases and for pollution of our waterways.

Fines for pollution of our waterways in both Canada and the USA are severe: $200k/day in Canada. Many fines of $400k+ have been levied for Canadian polluters.

The problem is that our sewers are aging and leaking more frequently and there is not enough money in municipal coffers to replace these tired assets with new pipe. Asset managers are facing escalating costs for emergency repairs, environmental fines, consent decrees and third-party damage while trying to scrape together funds for replacements. Fortunately, PICA can help!

Recently, PICA inspected a 5 mile length of 24″ force main for the City of Raymore, MO. The City was interested in knowing the condition of the first mile of this length but they found that the good information provided by PICA was so valuable that they are now considering paying the extra charge for the data from the remaining 4 miles of pipe to be analysed. As a first step, they will be excavating the line at several weak spots identified by the PICA SeeSnake tool. We fully expect that the condition of the pipe in these local spots will be confirmed, thereby saving the City from several potential environmental disasters.

Cast iron, ductile iron and steel pipelines laid in poorly drained soils and having virtually no external protective coating will corrode and eventually fail. The process of corrosion is often galvanic, ie: highly localized pitting locations caused by electric currents flowing between anodic and cathodic areas on the pipe. Just like your car battery post, the positive (or anodic) post corrodes while the negative (cathodic) post is untouched by  corrosion. Pipes can be protected by connecting sacrificial anodes (zinc ingots) at suitable spacing so that the zinc anodes corrode instead of the pipe. In many cases, PICA can identify long lengths of pipeline that can be protected and the corrosion process arrested by retrofitting the line with cathodic protection or buried anodes.

For a cost that is generally less than 5% of replacement cost, PICA can assure asset managers of the actual, full length condition of their pipelines. SeeSnake tools can be run once to provide a “snapshot” of line condition or be  run on a scheduled basis to monitor the changing condition over time and thereby project when repair or replacement is required.

For more information, contact one of our technical sales representatives in your area (www.picacorp.com).

Successful assessment of 24-in ductile iron force main

March 1, 2012 3 comments

Recently, PICA was contracted by the City of Raymore to inspect a portion of their 24-in DI force main. The line had been installed in the early 1990’s but had experienced three leaks. Subsequent soil analysis determined the soil was “hot” and potentially damaging for their unwrapped pipe.

In order to make good decisions regarding the rehabilitation of their 17,500 ft force main, they called in PICA to give them a report chronicling the exact condition of their line. The full story is described by Phil Becker (Engineering Technician with the City of Raymore) and Chris Garrett (General Manager of PICA USA) in February’s Trenchless Technology publication.

This force main project is one of many that PICA has accomplished in the last couple of years, proving that “Good Decisions start with Good Information”.