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Highland Tank HT-2033 User Manual

Aboveground cylindrical oil/water separators
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Built on Tradition
Aboveground Cylindrical
Oil/Water Separators
User Manual
Installation, Operation & Maintenance
Carefully read and follow the instructions in this manual.
HT, HTC, UL-SU2215
Single-wall & Double-wall
Models with EZ-Access Option
MADE IN
U. S. A.
814 • 893 • 5701 | highlandtank.com
HT-2033

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Summary of Contents for Highland Tank HT-2033

  • Page 1 Built on Tradition Aboveground Cylindrical HT-2033 Oil/Water Separators User Manual Installation, Operation & Maintenance Carefully read and follow the instructions in this manual. HT, HTC, UL-SU2215 Single-wall & Double-wall Models with EZ-Access Option MADE IN U. S. A. 814 • 893 • 5701 | highlandtank.com...
  • Page 2 Highland Tank disclaims all liability related to any misuse of the oil/water separator or failure to follow all guidance and instruction provided by Highland Tank.

  • Page 3: Table Of Contents

    OWS Reference Drawing Appendix - A - Sample Inspection and Maintenance Log Introduction Thank you for purchasing a Highland Tank Oil/Water Separator - the leading high-performance separator in the industry. The purpose of this manual is to provide detailed information on the installation, venting, startup, operation, maintenance and trouble-shooting of Highland Tank’s Oil/Water Separator.
  • Page 4 • Ensure adequate site space - many of our products are delivered on a 75 foot long tractor-trailer. Allow space for unloading, positioning and temporary storage if applicable. Contact Highland Tank if special delivery considerations are needed. • Ensure the crane has adequate lifting capacity and clearance - have operator check site for clearances (overhead, turning, etc.).
  • Page 5 Important points to consider continued: • IMPORTANT: Do not modify the OWS structure in any way. Do not weld on the OWS. • This is a stationary OWS. DO NOT use for transport of any product over roads and highways. •...
  • Page 6 Highland Tank’s OWS is a wastewater treatment tank used to Standard OWS Description & Operation intercept and collect free-oil, raw petroleum hydrocarbons, grease and oily-coated solids from a wastewater stream. They are typically required in all facilities that conduct washing,...

  • Page 7: Installation

    Under no circumstance should chains or slings be used around Max. 30º the OWS shell. Always use two lifting lugs to lift OWS. Highland Tank ® www.highlandtank.com Installation & Maintenance Instructions are available at www.highlandtank.com Use spreader bar Max. 30º when necessary Highland Tank ®...
  • Page 8 Inspection & Testing damage that could result in leakage or corrosion must be repaired in a manner approved by Highland Tank. Please refer to coating repair instructions below. If an OWS is not buried within 90 days, the OWS should be covered to protect the exterior coating from the effects of ultraviolet light damage.
  • Page 9 Re-coat the area with touch-up coating provided. See Fig. 2. Allow repaired coating areas to cure completely. Damaged coatings must be repaired with the repair kit that was delivered with the OWS. Additional coating touch-up is available from Highland Tank. Fig. 2 www.highlandtank.com • 9...
  • Page 10 The appropriate pneumatic or hydrostatic test may need to be Pre-installation Tightness Testing Procedures performed prior to placing OWS into service, as outlined below. Factory-applied vacuum test may be substituted for on-site testing. Check with AHJ for approval. Take all necessary safety precautions during air tests.
  • Page 11 If the vacuum level has changed significantly, reinstitute the vacuum to 7 inches of mercury. Maintain 5 inches of mercury vacuum for 2 hours. Consult Highland Tank if OWS does not hold vacuum. If the OWS did not ship with a vacuum on the interstice or AHJ requires testing, proceed with the air test as follows and as illustrated in Fig.
  • Page 12 OWS arrives at the installation site with if Required by AHJ the vacuum level within limits designated by Highland Tank. If the OWS did not ship with a vacuum on the interstice or vacuum has decayed, proceed with the test as described in Fig.
  • Page 13 Monitor gauge for one hour or as prescribed by AHJ. Gauge MUST NOT fluctuate more than 2 in. Hg for the duration of the vacuum test. If leak is detected, contact Highland Tank. After successful vacuum test, open Valve A to release vacuum. Remove test apparatus and proceed with installation.
  • Page 14 The use of steel cable and/or round bar as buoyant restraints is prohibited. Oil/Water Separator The OWS must be anchored to the foundation to prevent movement. Anchoring method must be determined by the engineer of record and approved by Highland Tank. 14 • www.highlandtank.com...

  • Page 15: Piping & Venting

    Attach inlet/outlet piping (contractor supplied) to inlet/outlet pipes on the OWS. Inlet and outlet inverts were established during manufacturing. Do not modify without first consulting Highland Tank. The OWS inlet and outlet piping must be sloped from 1/8 inch to 1/4 inch per foot to maintain gravity flow.
  • Page 16 OWS is designed for operation at atmospheric pressure ONLY. OWS Venting Guidelines OWS inlet, outlet and manways MUST be vented to atmosphere to assure proper operation. See Fig. 6. Note: Inlet pipe does NOT need to be vented when influent is being pumped into the separator.
  • Page 17 OWS. Cure time will vary depending on temperature and conditions. Contact Highland Tank if additional touch-up coating is needed. Optional OWS Electronics may have been provided for your project Optional OWS Electronics...
  • Page 18 Highland Tank offers a wide range of control panels and sensors to monitor the operation of your OWS. All panels include audible/ visual signals to alert the operator of system changes and system test buttons.
  • Page 19 (Optional) Please consult the job specific project information should you need continued detailed information regarding a specific alarm/control panel. Contact Highland Tank if you still need assistance. HTAP-1 - 1-Channel HTAP-2 - 2-Channel High-Oil or Leak Detection High-Oil and Leak Detection...
  • Page 20 FUEL LEAK TEST WATER LEAK TEST ALARM TEST ALARM SILENCE Below is a listing of Highland Tank’s control panel features. Refer to the previous diagrams to help understand the function of your particular panel. Panel Light or Button Description / Function...
  • Page 21 Fuel/Water Leak Sensor Alerts operator of a leak from primary wall of OWS into interstice. FUEL LEAK RESPONSE: Contact Highland Tank for procedure. Fuel leak will cause only fuel leak alarm. WATER LEAK Alerts operator of a water leak from primary or secondary wall of OWS into interstice.
  • Page 22 Leak Detection Procedure for fuel or water in the OWS interstice. Leak Detection System Procedure For easy and efficient monitoring of the interstitial space, the OWS (Optional) may be equipped with a Liquid Leak Detection Sensor to activate Double-wall OWS ONLY warning alarms if the interstitial space becomes filled with hydrocarbons or water during operation.

  • Page 23: Start-Up

    OWS Start-Up IMPORTANT: The OWS must be full of water as described below to operate. CAUTION: Separated liquid oil and vapors are flammable and/or combustible. Service personnel must comply with all established OSHA reg- ulations governing the facility and services. These include, but are not limited to, the use of approved breathing equipment, protective clothing, safety equipment and other requirements.
  • Page 24 Alarm should deactivate, and soon thereafter the High Oil Level Warning Alarm should deactivate. Note: If the alarms do not deactivate upon filling, remove the sensor and check for float binding or poor electrical connections. Contact Highland Tank @ 814-893-5701 should you need additional assistance. 24 • www.highlandtank.com...
  • Page 25 OWS Start-Up continued Ensure that OWS is completely full of water, and that water level is Skimmer Adjustment at the top of or flowing from effluent transfer pipe. Initiate expected rated flow to oil/water separator. Maximum liquid operating level is established when water surface in separation chamber has stabilized.

  • Page 26: Operation

    Waste accumulates within the OWS while effluent is discharged by gravity. Highland Tank OWSs will not remove oils with a specific gravity greater than designed for, chemical or physical emulsions, dissolved hydrocarbons, solvents, or volatile organic compounds (VOC).
  • Page 27 Free-floating oil and greasy solids accumulate in the OWS until they Operation continued are pumped out. Any and all oil recovered and removed from the OWS must be recycled or disposed of in accordance with federal, state and local regulations. Optional Petro-Screen Coalescer The Petro-Screen coalescer intercepts oil droplets too minute to...
  • Page 28 How It Works In the sediment chamber, heavy solids settle out and A Petro-Screen polypropylene impingement coalescer (an Highland Tank Oil/Water Separators are listed and approved Highland Tank’s patented oil/water concentrated oil rises to the surface. The oily water then...

  • Page 29: Maintenance

    Maintenance Separated liquid oil and vapors are flammable CAUTION: and/or combustible. Never enter an OWS or enclosed space, under any condition, WARNING: without proper training and OSHA approved equipment. See OSHA, Regulations for Permit-Required Confined Spaces 29 C.F.R. § 1910.146. All enclosed spaces must be properly vented prior to entry to avoid ignition of flammable materials or vapors.
  • Page 30 OWSs with oil level sensors require oil removal when the alarm is Maintenance activated. Stop OWS operation, remove the oil and then refill OWS continued with clean water (see Start-Up Instructions, page 23). OWSs without oil level sensors require level checking by use of a sampling device or a gauge stick with water finding paste.
  • Page 31 If the OWS has been cleaned within the year and only bottom sludge Maintenance continued has built up while the effluent water is contaminant free, it may be sufficient to vacuum the sludge from the sediment chamber and refill OWS with clean water. (See Start-Up Instructions, page 23.) Oil Removal Procedures Oil should only be removed during non-flow conditions to en- IMPORTANT:...
  • Page 32 Major Oil Spill Response Procedures IMPORTANT: A major oil spill is a spill that exceeds the normal oil storage capacity of the OWS. In the event of a major spill, notify proper authorities as required by federal, state and local laws. After a major oil spill, the OWS should always be emptied, cleaned and refilled with clean water.
  • Page 33 Determine exactly where the sludge/water interface is located using Sludge Removal Procedures a sampling device or a gauge stick. Open the Gauge Port or Chamber Manway. If used, insert gauge stick into the OWS through the Gauge Port or Manway. Alternately, a sampling device enables taking accurate readings on settled solids to any depth in the OWS.
  • Page 34 If not properly maintained, the OWS may malfunction. General OWS Cleaning Procedures NOTE: Over a period of time sediment, oil and grease will build up on the walls and floors of the OWS. Dirt and heavy oil may also build up on the Corella coalescer, reducing the unit’s efficiency.
  • Page 35 Using suction, remove the slurry from all chambers. Visually inspect the OWS interior and components for any damage. NOTE: If any visual damage exists, contact Highland Tank for further instructions. www.highlandtank.com • 35...
  • Page 36 Let coalescer packs stand to dry. Visually inspect the OWS interior and components for any damage. NOTE: If any visual damage exists, contact Highland Tank for further instructions. Reinstall the coalescer packs, restoring them to their original locations.
  • Page 37 and restarting procedures Troubleshooting Guide Problems which occur during OWS operation can be the result of many factors. The following list identifies the most common problems, their possible causes and suggested remedies. Problem Possible Cause Remedy Excessive oil concentrated Wastewater pumped into the OWS Adjust pump, change in OWS effluent water causing emulsification of oil droplets...

  • Page 38: Troubleshooting Guide

    Excessive solids in storm water Install Highland drainage area Collection Catch Basin in front of OWS and clean OWS. If you have any additional questions regarding OWS problems, contact Highland Tank. Email: wastewater@highlandtank.com Phone: 814-893-5701 38 • www.highlandtank.com...
  • Page 39 The Trickle Filter media consist of small pieces of absorbent filter media that are chemically treated to cause molecular cohesion of hydrocarbons. This media is contained in mesh bags and can be incorporated into any of Highland Tank’s HTC or R-HTC designs. www.highlandtank.com • 39...
  • Page 40 Media Replacement Cycle - The Trickle Filter media does require Special Model monitoring to determine the need for media bag change-out. Media Maintenance continued Series TF replacement should be carried out as needed, but at a maximum recommended period of every 18 months. Monitoring Possible scenarios that will require attention to the media.
  • Page 41 The Trickle Filter media is typically installed at the factory. To install Bag Replacement new media, a portion of the top grating must be removed as needed by unbolting it. After flow to the OWS has been suspended, remove top grating. Remove and properly dispose of the used media bags. Continue with the removal of any residual oils or water that may have drained from the media.

  • Page 42: Ows Reference Drawing

    42 • www.highlandtank.com...
  • Page 45 Stoystown, PA 15563 Manheim, PA 17545 Watervliet, NY 12189 Greensboro, NC 27407 Friedens, PA 15541 Clarkston, MI 48346 Mancelona, MI 49659 (814) 893-5701 (717) 664-0600 (518) 273-0801 (336) 218-0801 (814) 443-6800 (248) 625-8700 (231) 587-8412 © Highland Tank HT-2033 – 12/2023...