|
|
|
|
|
SURVEY QUESTIONS and INFORMATION
FOG in Sanitary Sewer Collection Systems Survey
The Water Environment Research Federation (WERF) is funding a study of the effects of fats, oil, and grease (FOG) on collection systems. The study team includes North Carolina State University (NCSU); the Town of Cary, NC; Southern Illinois University; and Solutions-IES. The study’s objectives are to
 |
determine the optimum design, operation and maintenance for grease interceptors; |
|
|
evaluate the effects of combined commercial, domestic, garbage grinder waste on grease interceptors; and |
|
|
determine if different piping materials have different susceptibility to blockages caused by FOG. |
This survey asks a series of questions related to your collection system characteristics and the nature of problems associated with FOG. The survey is an important component of the information that will be generated in this two-year study. The number of responses that are received will directly affect the quality of the project. Therefore, your effort to complete this survey as accurately as possible will be greatly appreciated by the project team and will ultimately affect the information that will be available to the community of collection system managers once the study is completed.
Information on this study will be periodically posted on the project website. You can find out more by visiting www.ce.ncsu.edu/research/frog.
Section 1.0 requests general information on your collection system and contact information for the managing agency. Section 2.0 includes questions regarding the FOG management practices used in the region supported by your collection system. Section 3.0 requests information on areas of your system that are problematic due to FOG or may have experienced recent overflows due to FOG. Section 4.0 requests information on your water supply characteristics. Section 5.0 requests your future cooperation in providing an actual sample of FOG from a blockage or cleaning of a problem area, and a contact for providing follow-up information.
To complete this survey electronically, either select the correct response or enter additional information in the space provided on the form. When you are finished with your responses, simply click on “Submit Now” and we will receive it.
If you choose, you may also print this form [click here for PDF], complete it, and send it via regular mail or FAX to the contact information below. You may also use the contact information below to ask questions you may have about completing the survey.
Solutions-IES
1101 Nowell Road
Raleigh, NC 27607
RE: WERF Study
Telephone: (919) 873-1060
Facsimile: (919) 873-1074
Ask for Barbara Oslund or Heather Markell
Thank you for your valuable contribution to this study.
Survey
| Name* | |
| Address* | |
| EPA Region |
Name of person completing survey
| Name* | |
| Title |
| Phone* |
| E-Mail* |
1. General System Information:
a. What is the approximate age of most of the system:
b. What is the approximate size (e.g. miles) of the gravity portion of your drainage system?
c. What is the capacity (MGD) of the collection system?
d. Does the system carry combined sanitary wastes and stormwater (other than inflow/infiltration)?
Yes No UnknownPartially: percent combined %
e. What is the Seasonal temperature variation of sewer (check with WWTP for influent temperature data)
Quarterly average:
| Winter | |
| Spring | |
| Summer | |
| Fall |
f. Sanitary sewer piping material [select all that apply]
| Ductile Iron | ||
| What percentage of your system is of this material? | % | |
| PVC (indicate schedule and type) | ||
| What percentage of your system is of this material? | % | |
| Truss | ||
| What percentage of your system is of this material? | % | |
| Clay | ||
| What percentage of your system is of this material? | % | |
| Reinforced Concrete | ||
| What percentage of your system is of this material? | % | |
| Asbestos lined | ||
| What percentage of your system is of this material? | % | |
| Other | ||
| What percentage of your system is of this material? | % |
2. FOG management practices:
a. Is a FOG deposit and obstruction prevention program in place?
Yes No
Please describe the prevention program:
b. How many full-time employees are required for the program?
c. Is the FOG prevention program enforced?
Yes No
If so, please identify the methods of enforcement.
|
|
Inspections/code enforcement |
|
|
Fines/penalties |
|
|
Termination of service |
|
|
Other |
d. How many grease traps/interceptors are connected to your collection system?
e. What criteria are used to size grease traps/interceptors in your system [check all that apply] ?
|
|
flow rate |
|
|
retention time |
|
|
number of meals per hour |
|
|
storage capacity |
| location/access | |
|
Other
|
f. What is the minimum recommended frequency for maintenance/pump-out?
Once every days
g. Is partial pump-out (e.g. decanting of liquids) allowed?
Yes No
If yes, what is the minimum frequency?
Once every days
h. Is there a maximum percentage of sludge/solids that are allowed to accumulate before pump-out is required?
Yes No
If yes, please state the percentage
3. FOG deposit information:
a. What types of food service establishments or other customers contribute wastewater to areas of the system heavily impacted by FOG deposits [select all that apply]:
Single service/fast food: burgers, fish, chicken, pizza, ethnic, other.
List Types
Full service restaurant: steak, chicken, vegetarian, fish, cafeteria, ethnic fare, other.
List Types
Institutional: assisted care center, church, school, entertainment center, day care center, other.
List Types
Other (including residential)
Describe:
b. What type of sanitary sewer piping is present in areas heavily impacted by FOG deposits?
Describe:
c. Does root intrusion also contribute to blockages in areas heavily impacted by FOG deposits?
Yes No
d. Treatments used to clear obstructions:
Jetting Cutting Other
Please describe the effectiveness of the treatment(s):
4. Water Supply Information:
a. What are your primary water supply sources [check all that apply]?
|
|
Surface water impoundments |
|
|
Groundwater |
|
|
River water |
|
|
Other |
b. What is your primary disinfection method?
Please describe:
c. Is reclaimed water distributed in your service area for uses other than irrigation or heating/cooling?
Yes No
If so, please estimate the percentage of collection system flow is reclaimed water %
5. Follow-up Information:
a. Would you be willing to collect/send a sample from a typical FOG deposit impacting the system?
Yes No
Unable to do so
Alternate contact able to assist
| Name | |
| Phone | |
b. Would you be willing to provide water quality data for your water supply source?
Yes No
Unable to do so
Alternate contact able to assist
| Name | |
| Phone | |
Please print a copy for your records.
Dr. Kevin Keener, Purdue University,
Leon Holt, Town of Cary,
Water Environment Research Foundation (WERF.org)