Download Picture 1
The Forest Lake Reservoir, recently refurbished with a liner made from
Hypalon®, will help keep the famous golf courses of Monterey Peninsula green
with recycled water.
Download Picture 2
Installation of a high-performance 5-ply liner material, consisting of 3 layers of
Hypalon® and 2 layers of woven fabric scrim, nears completion at Forest Lake
Reservoir in Pebble Beach, Monterey Peninsula, California.
Download Picture 3
Workers from Layfield Environmental Systems Corporation roll out one of the
175 liner panels of Hypalon® and woven fabric scrim at the rehabilitated Forest
Lake Reservoir, Pebble Beach, Monterey Peninsula, California.
Download Picture 4
(L to r) Rueben Ortiz, quality control technicion, and Brad Falk, field supervisor,
both of Layfield Environmental Systems, discuss the plan for installing 175 liner
panels of Hypalon® andwoven fabric scrimat the rehabilitated Forest Lake
Reservoir, Pebble Beach, Monterey Peninsula, California. .
Download Picture 5
High-performance 65 mil 5-ply liner installed at Forest Lake Reservoir consists
of 3 layers of DuPont Performance Elastomers Hypalon® chlorosulfonated
polyethylene, and 2 layers of woven fabric scrim, resulting in a leakproof, soil
stabilizing liner with an expected service life of at least 25 years.
Download Picture 6
Rehabilitation of Forest Lake Reservoir at Pebble Beach required approximately
20,000 cubic yards (15’291 m3) of additional grading, further excavation of the
reservoir floor, and installation of a scrim reinforced 5-ply liner made from
DuPont Performance Elastomers Hypalon® chlorosulfonated polyethylene.
Geneva, Switzerland – 23 August 2006 - The newly commissioned Forest Lake Reservoir supplies recycled water to seven famous golf courses on the spectacular Monterey Peninsula in California, USA, including Cypress Point and US PGA Tour venues Pebble Beach, Spyglass Hill and Poppy Hills. The reservoir was rehabilitated in May 2006 with the installation of a long-service liner made of Hypalon® chlorosulfonated polyethylene from DuPont Performance Elastomers.
The reservoir liner meets stringent leakproofing, soil stabilizing and environmental demands, in line with new operating permit requirements of the California Department of Water Resources Division of Safety of Dams (DSOD). Consisting of three layers of Hypalon® and two layers of woven fabric scrim, the high-performance liner material is expected to have a service life of at least 25 years.
Forest Lake Reservoir was originally constructed in 1887, and had operated as an unlined reservoir until the early 1990s. The rehabilitation project was commissioned by the Pebble Beach Community Services District (PBCSD).The liner was manufactured by Burke Industries, San Jose , California , USA , then prefabricated into panels totalling nearly 93,000 square metres by Layfield Plastics Inc., and installed on site by Layfield Environmental Systems Corporation., San Diego , California , USA . The general contractor was Anderson Pacific Engineering Construction, and consulting engineers
E2 Inc.
“The DSOD was concerned that if water saturated the reservoir embankments, the stability of the embankments could be affected in an earthquake. Hypalon® was used for a similar reservoir rehabilitation project in the Los Angeles area and DSOD approved the 5-ply, 65 millimetre liner of Hypalon® and woven fabric scrim. The new liner and leak detection system is designed to keep any stored water from entering the embankments,” says Mike Niccum, district engineer at PBCSD.
The newly commissioned reservoir covers an area of approximately 9.3 hectares, and has a permitted water storage capacity of just under 400 million litres. It is a key part of the recycled water distribution system that provides irrigation water to seven top golf courses in the area, and several additional recreation areas in the Del Monte Forest.
“Burke Industries has been manufacturing reservoir liners and floating covers of Hypalon® since 1967, that’s nearly 40 years of experience with chlorosulfonated polyethylene. We believe it’s the most durable pond liner material yet developed, with an expected service life of at least 25 years. As an example, the liner of Hypalon® we supplied for the 168 acre reservoir in Perry Florida, USA , in 1971 is still watertight and in good condition 35 years later,” says Steve Roades, vice president of Burke Industries.
“Such extended performance is partly due to its excellent tear and puncture strength, and dimensional stability. With Hypalon®, additional cross-linking develops after installation producing an even tougher and more weatherable liner. It is also much more colourable than materials like high-density polyethylene, polypropylene and thermoplastic polyolefins. For Forest Lake we produced the liner material in an attractive custom colour to blend with the environment. We call it ‘Pebble Beach Tan’.”
Jon Feenstra, project manager of Layfield Environmental Systems, and the site supervisor responsible for onsite field installation, describes his company’s involvement in the Forest Lake Reservoir project.
“Layfield Plastics Inc., part of the Layfield Group, fabricated the roll stock of Hypalon®, supplied by Burke Industries, into approximately 175 larger panels, the largest being 10.36 metres wide by 61 metres long, for field installation. This is where the Layfield Environmental Systems team took over, installing the panels over the graded and re-excavated site, using a hot wedge welding system and cross-seaming with adhesive patches of Hypalon®.”
Flexible geomembrane liners and covers for raw and potable water storage, produced from DuPont Performance ElastomersHypalon®, fulfil the latest demands of municipal reservoir engineers, and meet or exceed US federal regulations such as ANSI/NSF Standard 61, and the American Water Works Association (AWWA) standard D 130-96.
“Liners and covers of Hypalon® have been weathered outdoors for many years with minimal fading and discoloration. They resist ultraviolet radiation, ozone and water treatment chemicals,” says Paul DiAntonio, business development manager, DuPont Performance Elastomers. “The material has a very low thermal expansion coefficient and remains stable yet flexible at high and low temperatures. Repeated freezing and thawing cycles do not cause mechanical damage, and its elasticity allows liners to accommodate limited earth movement.”
“On-site seaming with chemical fusion or hot-air welding produces a strong seam and is simple, fast and cost-effective. Liners and covers of Hypalon® also offer an economically attractive alternative to concrete, steel and other rigid construction materials. The flexible option offers low initial capital cost, low maintenance and operating cost, and also reduced chlorine costs through prevention of chlorine depletion,” DiAntonio adds.
With over 40 years of proven performance in reservoir liners and covers, it is little surprise that Hypalon® was the material of choice for the newly operational Forest Lake Reservoir. Now, the continued top class conditioning of courses like Pebble Beach - a golfing treasure famous as the scene of Jack Nicklaus’ memorable U.S. Open Championships win in 1972, and the most talked about shot in golf, Tom Watson’s chip-in at the 17 th hole en route to winning the 1982 U.S. Open - is assured.
About DuPont Performance Elastomers
DuPont Performance Elastomers, a global supplier of specialty elastomers with European headquarters in Geneva , Switzerland , is a wholly owned subsidiary of DuPont. The company is an industry leader in chlorinated and fluorinated elastomers, serving the automotive, chemical, petrochemical, semiconductor, food and pharmaceutical processing, construction, general rubber and wire and cable industries.
About Burke Industries
Burke Industries, of San Jose , California , USA , has over 50 years experience of manufacturing rubber products for the construction industry. The company comprises Burke Mercer Flooring Products, Burkeline® Roofing Systems, Burke Environmental Products and Burke Custom Process. Burke developed flexible membranes for pollution control beginning in 1969. Currently over 200 million square feet (about 15.5 million square metres) are installed in applications from liners for decorative ponds and wastewater treatment lagoons to floating covers for potable water and methane gas collection systems. Burke is a leading manufacturer of floating covers of Hypalon®, and can produce liner panels up to 30,000 square feet (2,787 square metres) to minimize seaming on site. Visit: www.burkeindustries.com
The Forest Lake Reservoir, recently refurbished with a liner made from Hypalon®, will help keep the famous golf courses of Monterey Peninsula green with recycled water.
(A high resolution version of this image is available from Gibbs & Soell Public Relations on demand.)
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Note to Editors:
Please mention DuPont Performance Elastomers by its full name in the first reference. For all references thereafter, the company may be cited as DPE.
Hypalon® is a registered trademark of DuPont Performance Elastomers
DuPont is a trademark of DuPont and its affiliates.
Reader Enquiries:
DuPont Performance Elastomers S.A.
2, chemin du Pavillon
CH-1218 Le Grand-Saconnex
Geneva , Switzerland
Phone: +41 22 717 4000
Fax: +41 22 717 4001
http://www.dupontelastomers.com
Press Contact/Photographs:
Kellie Nolan
Gibbs & Soell Public Relations
Zurich , Switzerland
Phone: +41 44 205 5565
knolan@gibbs-soell.com
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