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v~r~ii Si.' . I', ,~ ~TE~Q~ Recommended Oi! Sorbenrs Rubberizer~ Particulate 8-4 mesh ar OARST`s Particulate for Filtration, HPT4100 or equal. Rubberizer~ is supplied by Haz-Mat Response Technologies, inc. 4626 Santa Fe Street, San Diego, CA 92109 {800) 542-3036. OARSTM is supplied by AbTech Industries, 411 Q FU. Scottsdale Road, Suite 235, Scottsdale, AZ 85251 (800) 645-8999. The amount of sorbent to be added to the CDS separation chamber can be determined if sufficient information is known about the concentration of oil and grease in the runoff. Frequently the actual concentrations of oil and grease are too variable and the amount to be added and frequency of cleaning v~ill be determined by periodic observation of the sorbent_ As an initial application, CDS recommends that approximately 4 to $ pounds of sorbent material be added to the separation chamber of the GDS units per acre of parking lot or road surface per year. Typically this amount of sorbent results in a /2 inch to one (1") inch depth of sorbent material on the liquid surface of the separation chamber. The oil and grease loading of the sorbent material should be observed after major storm events. Di! Sorbent material may also be famished in pillow or boom configurations. The sorbent material should be replaced when at is fully disca9ore~cl by shimming the sorbent from the surface. The sorbent may require disposal as a special or hazardous waste, but will depend on [oval and state regulatory requirements. CLEANO[JT AND DISPC3Si4L - A vector truck is recommended for cleanout of the CDS unit and can be easily accomplished in Tess than 30-40 minutes for most installations. Standard vector operations should be employed in the cleanout of the CDS unit. Disposal o€ material from the CDS unit should be in accordance ~r~ith the local municipality's requirements. Disposal of the decant material to a POTW is recommended. Field descanting to the storm drainage system is not recommended. Solids can be disposed of in a simitar fashion as those materials cailected from street sweeping operations and catch-basin cieanouts. 1°JfAtt~TENANCE The CDS unit should be pumped do~~m at least once a year and a thorough inspection. of the separation chamber (inletlcyiinder and separation screen) and oil baffle performed.- The unit's internal components should not show any signs of damage or any loosening of the boats used to fasten the various components #o the manhole structure and to each other. Ideally, the screen should be power washed far the inspection. If any of the internal components is damaged or if any fasteners appear to be damaged or missing, please contact CDS Technologies to make arrangements to have the damaged items repaired or replaced: GDS Technologies, [nc. 16360 Monterey Road, Suite 250 Morgan Hili, CA 95037-5446 Phone, Tail Free: (888} 535-7559 Fax: X408} 782-0721 Exhibit B -3