sewer needs of customers residing in several southern communities of San Diego County down to the border of Mexico. This region has a very hot, arid climate with summer average temperatures ranging from 70°F to 100°F (21°C to 38°C). Winter average temperatures range from 45°F to 60°F (7°C to 16°C). San Diego County is known for a very high to extreme UV index most months of the year. The original cover and liner material for the Upper Reservoir were installed in 1988 using a 45-mil (1.14-mm) CSPE. A special aqua skin color was chosen for the skin layer of the CSPE for its aesthetic. The Upper Reservoir is used as a potable water reservoir, servicing a rapidly growing population base in San Diego County. A weighted tension cable system was chosen for the cover design based on its lower maintenance cost-primarily the result of not having any surface floats or sumps required to tension the cover. It also allows the operator to use the existing hardware when replacing the cover at the end of its life, representing a measurable cost savings during replacement. In 2018, the existing cover and liner needed to be replaced to allow for mechanical pipe and pump upgrading requirements. At the time of relining, the Upper Reservoir floating cover had been in operation for 30 years with no reported major problems encountered Go Beyond the Field C O N T A I N | C O N T R O L | C O M P L Y Plastatech® custom-fabricated accessories help you achieve faster installation times and reduce leaks for longer lasting results. For more information about our accessory line, give us a call or visit the website today: Designed to meet your specific needs, our accessories include pipe boots and corners, and are available in: plastatech.com 800-892-9358 Polyvinyl Chloride (PVC) High-Density Polyethylene (HDPE) Linear Low-Density Polyethylene (LLDPE) Reinforced Polyethylene (RPE) Reinforced Polypropylene (RPP) Thermoplastic Olefin (TPO) Reference your local and federal containment regulations for complete compliance requirements. Plastatech is a registered trademark of Plastatech Engineering, Ltd. | Plastatech is proudly manufactured in the USA. PL040004 Accessory-Ad_ORIG: 1.14.20 www.GeosyntheticsMagazine.com 0420GS_p32-40.indd 39 39 3/23/20 5:30 PMhttp://www.plastatech.com http://www.GeosyntheticsMagazine.com