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Why isn’t chlorine treatment of potable water enough to keep water safe?

March 18, 2020 Leave a comment

I had some water utility workers ask me, “Why isn’t chlorine treatment of potable water enough to keep water safe? Why should we worry about cleaning tanks when we already use chlorine?”

Chlorine works great as long as there is not a breach in the tank. When there is a breach like a hole in the top that lets birds and insects inside the tank, the chlorine can not keep up. This is why annual tank inspections are so important. People have died from this scenario, see: “Salmonella Outbreak in Alamosa, Colorado“. According to USEPA officials a sediment build up on the interior floor of a water storage tank is another type of breach. Bacteria like Legionella, protozoa like Cryptosporidium, and a wide range of viruses including Norovirus can hide and GROW in the tank sediment.

Do you know what the #1 cause of municipal water contamination is? According to the CDC it is a microscopic parasite called Giardia. The sediment becomes a perfect habitat providing both shelter and food for Giardia and many other microorganisms to grow. In time, the contaminants can reach a point where they overwhelm chlorine or any other disinfectant you may be using. Keeping tanks clean keeps your drinking water safe.

Giardia- Photo CDC website

Giardia- Photo CDC website

Top 10 Causes – Outbreaks in Public Water Systems*

For a complete listing of water-related surveillance data, see CDC’s Surveillance Reports for Drinking Water-associated Disease & Outbreaks.

A professional potable water Dive Crew can remove tank sediment along with everything that is growing in it with minimal water loss.  The diver is sealed in a DRY suit so there is no human contact with the water supply.  Before entering the water system the diver is washed down with a chlorine solution to meet state and federal guidelines. The diver can then enter the tank and make quick work of removing tank sediment and any contaminant that may be hiding in it. It is basic housekeeping! You would not drink out of a dirty glass, no one should drink out of a dirty water storage tank or tower either. If you need a water storage tank or tower cleaned, give us a call toll free at 1-888-481-1768 for a free quote.

For more information on Municipal Water Tank Cleaning see: Ron Perrin Water Technologies web Site: www.rpwt.us.

Content source: Centers for Disease Control and PreventionNational Center for Emerging and Zoonotic Infectious Diseases

Water Tank & Tower Inspection and Cleaning by Ron Perrin Water Tech.

August 10, 2019 Leave a comment

Ron Perrin Water Technologies performs over 800 Water tank inspection’s every year.

Since 1997 we have performed thousands of inspections for water utilities in 14 states.  Our remote underwater camera inspection is our most popular service.  Since 1997 we have performed thousands of inspections for water utilities in 14 states.

Visit our water tank inspection web site at: http://www.watertankinspection.com

Our Remotely operated Vehicle inspection is also popular for larger facilities.  We maintain a feet of three ROV’s to meet our customer demands at any time.  Our reports caver all required State and AWWA inspection points.  Be deliver the completed inspection report back in a notebook/binder for convienient reference and storage.

Water Tank Inspection ROV

DEEP TREKKER ROV

Diver inspections are our third method.  Often used when specific inspection goals are required.  Divers also perform inspections after tank cleanings.  The diver is sealed in his own environment and washed down with a chlorine solution to meet all AWWA and EPA requirements.  This allows the diver to enter the water system and move around freely.

 

Water tank & tower inspection and water tank & tower cleaning is our specialty since 1997.  Please visit our web site at www.ronperrin.us or www.watertankinspection.com for more information.  For a free price quote call 817-377-4899.

Do you need a Texas Inspection form? Just Click Here: FORM

 

DIVE SUPERVISOR WANTED

June 13, 2017 Leave a comment

SEE:  http://www.tankdiver.us

Fort Worth, Texas RON PERRIN WATER TECHNOLOGIES is Now hiring all Positions.

Call 817-377-4899 to set up your interview.  Send resume and salary history to

Debi at tankinspections@aol.com

 

Helpful USEPA Papers and Links

Here are three very helpful USEPA papers written by the Office of Ground Water and Drinking Water between 2002 and 2006.
Finished Water Storage Facilities August 15, 2002
Page 2
2.1.1 Sediment
Sediment accumulation occurs within storage facilities due to quiescent conditions which promote particle settling. Potential water quality problems associated with sediment accumulation include increased disinfectant demand, microbial growth, disinfection by-product formation, and increased turbidity within the bulk water. Instances of microbial contamination and disinfection by-product formation due to storage facility sediments are described in the Pathogen Contamination and Microbial Growth section and the Disinfection By-Product formation section, respectively.
Page 11
Comprehensive inspections are performed to evaluate the current condition of storage facility components. These inspections often require the facility to be removed from service and drained unless robotic devices or divers are used. The need for comprehensive inspections is generally recognized by the water industry. AWWA Manual M42 (1998) recommends that tanks be drained and inspected at least once every 3 years or as required by state regulatory agencies. Most states do not recommend inspection frequencies thereby leaving it to the discretion of the utility. States that do have recommendations are Alabama (5 years), Arkansas (2 years), Missouri (5 years), New Hampshire (5 years), Ohio (5 years), Rhode Island (external once per year; internal, every five years), Texas (annually), and Wisconsin (5 years). Kirmeyer et al. (1999) recommend that comprehensive inspections be conducted every 3 to 5 years for structural condition and possibly more often for water quality purposes.
Page 12
Kirmeyer et al. (1999) recommended that covered facilities be cleaned every three to five years, or more often based on inspections and water quality monitoring, and that uncovered storage Prepared by AWWA with assistance from Economic and Engineering Services, Inc. 12facilities be cleaned once or twice per year. Commercial diving contractors can be used to clean and inspect storage facilities that cannot be removed from service. AWWA Standard C652-92 provides guidelines for disinfection of all equipment used to clean storage facilities.
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On December 2006 Office of Ground Water and Drinking Water. Total Coliform Rule Issue Paper. Inorganic Contaminant Accumulation in Potable Water Distribution Systems.
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Health Risks from Microbial Growth and Biofilms in Drinking Water Distribution Systems June 17, 2002
Page 26
G. Sediment Accumulation
Significant microbial activity may occur in accumulated sediment (USEPA, 1992b). Organic and inorganic sediments can also accumulate in low-flow areas of the distribution system, and enhance microbial activity by providing protection and nutrients (USEPA, 1992b). Biofilms that slough can accumulate in the periphery of distribution systems leading to sediment accumulation and the proliferation of some microorganisms (van der Kooij, 2000). Sediments may be an important source of nutrients in open finished water reservoirs, by accumulating slowly biodegrading materials which are then broken down and released into the water column (LeChevallier, 1999b). The opportunities for biofilm development may be more abundant in storage tanks than in distribution system piping. Frequently, water is drawn from storage tanks only when water demand is high, such as during drought, fire flow, and flushing operations. This intermittent use results in prolonged storage times that may lead to increased sediment accumulation and lack of a disinfectant residual in the finished water storage vessel. Biological and aesthetic effects can be observed following the release of accumulated sediments from low flow areas of the distribution system (Geldreich, 1990).
Many studies have identified microbes in accumulated sediments, including both pathogens and non-pathogens. These include bacteria, viruses, protozoa, algae, fungi and invertebrates. Opportunistic pathogens that have been detected, and can multiply in sediments, include Legionella andmycobacteria (van der Kooij, 2000). Some primary pathogens can also survive for some time in sediments. Hepatitis A virus survived more than four months in sediments at both 5/C and 25/C (Sobsey et al., 1986). Other opportunistic pathogens found in sediments include Pseudomonas fluorescens and Flavobacterium spp. (Berger et al., 1993). Sediments can also release nutrients into the water which stimulate biofilm growth downstream (LeChevallier, 1999b).
Page 34
I. Proper Storage Vessel Management and Alteration
Proper storage vessel management and alteration, when necessary, can prevent contamination of the distribution system. Following TCR violations in 1996 in Washington D.C., one measure that proved effective in bringing the system back into compliance was the cleaning, inspection and disinfection of storage tanks and reservoirs (Clark, et al., 1999). To reduce pathogen presence and biofilm development, systems should have a scheduled program to rehabilitate all water storage facilities (USEPA, 1997). Proper operation and maintenance of storage tanks and reservoirs is listed as a BAT in the TCR (USEPA, 1992b). Storage tanks and standpipes should be pressure flushed or steam cleaned, then disinfected before returned to service (USEPA, 1992b), preferably with a disinfectant solution. This may not only remove microbial contamination from the vessel’s inner surface, but also nutrients that may be present. Proper operation of storage vessels can also reduce excessive residence times, which can lead to microbial survival and growth, and biofilm formation. Properly designed inlets and outlets, and the overall system design can improve problems caused by dead ends (Trussell, 1999). Pathogen contamination due to air introduction can be reduced by installing air filters to guard against pollution entering covered water reservoirs (USEPA, 1992b). Covering finished water reservoirs can protect against contamination from airborne sources, surface runoff, accidental spills and animals, such as insects and birds (USEPA, 1992b). EPA’s Uncovered Finished Water Reservoirs Guidance Manual describes recommended contamination control measures related to birds and other animals, human activity, algal growth and insects and fish (USEPA, 1999b). An understanding of the storage hydraulics and operation is important in reducing contamination of the finished water.
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If you need assistance inspecting or cleaning water storage tanks or towers call
Ron Perrin Water Technologies toll free at 1-888-481-1768.
For a fast quote Fax your tank information to 817-246-1740.
Or e-mail your tank information:
Out of Texas contact Robert at perrinsales@gmail.com
Texas Water Utilities please contact Debi Wheelan at tankinspections@aol.com

ARE YOU A Ron Perrin Water Technologies CUSTOMER?

June 23, 2015 Leave a comment

Do you know Ron Perrin?

Have you used Ron Perrin Water Technologies ?

Please write a review, we would love to post your comments about our service. We are celebrating our 18th year inspecting and cleaning water storage tanks and towers. I am proud to report that I have maintained my first customer this entire time. We now have many utilities we have serviced for over 17 years. Old or new, if you are one of our customers we would like to hear from you! Please take a minute and write a short review on our Facebook page!

https://www.facebook.com/ronperrinwatertech

Tank Inspector

Tank Inspector

CBS 11 i-Team watches as my company inspects and cleans a north Texas water tower.

November 20, 2014 Leave a comment

November 7th, 2014, Ginger Allen and the CBS 11 i-Team watches as my company inspects and cleans a north Texas water tower. The tower was cleaned as a normal maintenance procedure. A light- brown dusting of sediment was removed from the interior floor before it could get deep enough to support bacteria and become a problem.   OLYMPUS DIGITAL CAMERA The tower was cleaned by a Commercial Diver who was trained at OCEAN CORP, Houston, Texas. The Diver is sealed in his own environment, then washed down with a chlorine solution. Because we specialize in the inspection and cleaning of Potable Water Storage Facilities, all of our equipment is purchased for, and only used in, potable water. This utility is doing a great job of maintaining their system. However, utility managers across the country struggle to get the funds to properly maintain their systems. The EPA is currently considering a regulation that would require all water storage facilities to be inspected and cleaned at regular intervals. This new requirement could improve the water quality for millions of Americans.

Ron Perrin Speaks to News Crew

Ron Perrin Speaks to News Crew

The EPA is taking comments on this proposed regulation until the end of the year. We have the contact information posted on our blog, or you can just take our poll at: www.cleanwatertankproject.com. The poll results will be turned in to the EPA at the end of the year.

CBS 11 I-Team Looks At What’s In Your Water Tower

 

 

Chick here to see video Video

http://launch.newsinc.com/embed.html?type=VideoPlayer/Single&widgetId=1&trackingGroup=69016&siteSection=ndn&videoId=28175822

The Written article is here:

http://dfw.cbslocal.com/2014/11/19/watertowers/http://dfw.cbslocal.com/2014/11/19/water-towers/

—–Photos taken by RPWT Office Manager Debi Wheelan

Robert Perrin on com bot talking to the diver

Robert Perrin on com bot talking to the diver

Find us on FACEBOOK  or connect with Ron on Linked-In AND PLEASE SHARE THIS POST AND THE CBS NEWS STORY WITH YOUR FRIENDS EVERYONE DESERVES TO HAVE CLEAN SAFE TAP WATER, Take the Poll at www.cleanwatertankproject.com and we can make this happen!

Now we can add a brain-eating amoeba to the list of contaminants that can be in tank sediment

August 27, 2014 Leave a comment

By Ron Perrin

Removing sediment from the floor of your water tanks and towers may also be removing the habitat that allows bacteria, protozoa and viruses from getting a foothold in your distribution system. Now we can add a brain-eating amoeba to the list of contaminants that the sediment on the floor of your water storage tank can support.

Sediment being Removed from water storage tank

Sediment being Removed from water storage tank

September 16, 2013, NBC News reported: “Deadly brain amoeba infects US tap water for the first time”. The death of a 4-year-old boy near Violet, LA., was linked to the Naegleria fowleri amoeba. The child had been playing on a backyard slip-n-slide that used water from the St. Bernard Parish water system, that was later found to be contaminated with the amoeba. “Tests show it’s present throughout the water supply system in St. Bernard Parish, directly southeast of New Orleans.”

According to the CDC: “Naegleria fowleri (commonly referred to as the “brain-eating amoeba” or “brain-eating ameba”), is a free-living microscopic ameba, (single-celled living organism). It can cause a rare and devastating infection of the brain called primary amebic meningoencephalitis (PAM). The ameba is commonly found in warm freshwater (e.g. lakes, rivers, and hot springs) and soil. Naegleria fowleri usually infects people when contaminated water enters the body through the nose. Once the ameba enters the nose, it travels to the brain where it causes PAM, which is usually fatal. Infection typically occurs when people go swimming or diving in warm freshwater places, like lakes and rivers. In very rare instances,Naegleria infections may also occur when contaminated water from other sources (such as inadequately chlorinated swimming pool water or heated and contaminated tap water) enters the nose. You cannot get infected from drinking water contaminated with Naegleria.”

The CDC also tested nearby DeSoto Parish Waterworks Dist. #1 because it was the near the site of an infection that happened in 2011 from non-potable water (lake or river, etc.). On October 8, 2013, The CDC confirmed the presence of the rare amoeba in five locations in DeSoto Parish Waterworks Dist. #1.

Heat is also a factor, an increase in only ten degrees can double the speed of bacteria growth. As record high temperatures become more common in summer months we see that keeping water distribution tanks free of sediment build up may be more important than ever before. Removing the sediment from your water tank may prevent a disaster before it can ever start.

The new Revised Total Coliform Rule (RTCR) will be fully implemented in 2016. It requires assessment and corrective action when there are indications of coliform contamination. The RTCR no longer includes a monthly maximum contaminant level violation for multiple total coliform detections. Instead, systems that have indicators of coliform contamination in the distribution system must assess the problem and take corrective action.  Well documented tank inspections should be part of assessing your problem.  If there is sediment build up in the tank, cleaning would be a logical corrective action to take.

The fact is, keeping your tanks clean may also prevent you from getting an RTCR violation in the first place. What we have found is this: Once the sediment is removed, our utility customers discover that chlorine costs are reduced because the chlorine is no longer losing the war with the microbes that were growing in the sediment.

However you choose to do it, just get it done. Do not let it go year after year, out of sight and out of mind.   Knowing what is in your facilities with a good inspection is your first line of defense.  If an accumulation of sediment is found, don’t think of it as “just a little dirt.” Know that it is a broken barrier that can allow contaminants to compromise the entire water supply and the health of the community

About the Author:
CSHO LOGORon Perrin is a Certified Safety and Health Official (CSHO), a member of the Texas Water Utilities Association, AWWA,

Ron Perrin Owner of Ron Perrin Water Technologies

Ron Perrin Owner of Ron Perrin Water Technologies

and the owner of Ron Perrin Water Technologies in Fort Worth, Texas. Since 1997 his company has inspected over seven thousand water storage tanks and towers in 14 states. Ron may be contacted through his web site at http://www.ronperrin.com.
Or contact RPWT Office Manager Debi Wheelan:
tankinspections@aol.com

Call: 817-377-4899

Fax 817-246-1740