IL PRIVATE SEWAGE DISPOSAL SEPTIC INSTALLERS
EXAMINATION PART 1 QUESTIONS WITH DETAILED VERIFIED AND
100% ACCURATE ANSWERS
Public Sewer Connection Correct Answers Private residence must
connect if w/in 300' or for any commercial bldg. w/in 300' that has flows
less than 1500 gpd. Commercial w/ flows = to or greater than 1500 gpd
must connect if sewer is w/in 1000'.
Unless physical barrier, ordinance, or cannot be done w/ individual line
(4" line)-then PSD system is OK.
Acceptable Pipe Materials Correct Answers Vitrified clay, ductile iron,
or plastic.
Anything after the tank or from distribution box has to be vitrified clay
or plastic.
Schedule 40 or Greater Correct Answers under roads, driveways, or
parking areas
Gravity Slope Correct Answers Diameter: 4" pipe + min. slope of 12"
per 100'
Building sewers in excess of 50' should have what? Correct Answers A
C/O @ least every 50' from building to tank, distribution box, or ATU
Creviced Limestone Formation Correct Answers SS system cannot be
installed where bottom of system is less than 4' from top of limestone
,If limestone is known to be present a soil test must be done @ least 4'
deeper than where the bottom of the trench will be
How far away can quick disconnect be? Correct Answers no more than
50' away from the device & w/in sight of
Experimental Use Permits Correct Answers min. of 10 experimental
systems installed b4 unconditional approval granted. Permit valid for 2
yrs & evaluated @ end of 2 yrs.
2 options for garbage grinders Correct Answers 1. solids retention tank
btwn WW source & septic tk. for kitchen waste only. Needs to be 50%
of the size of the designed septic tank w/ a min. of 500 gals.
2. A septic tank receiving all flows sized as 50% of the septic tank size +
septic tank size. i.e., septic tk = 1500 gals. /2 = 750 + 1500 = 2250
(would need 2500 gal tk)
How long should a homeowner keep maint. records for their system?
Correct Answers the life of the system
When should the 1st maintenance of a septic tank after installation be
completed for a residence? Correct Answers Prior to or within 3 yrs.
After initial inspection it can be done once every 5 yrs. Can be done by
everyone + homeowner
If sludge layer /suspended solids are greater than 33% . . . Correct
Answers Must pump tank and perform maintenance
, When should a septic system be evaluated initially after installation for a
non-residential bldg? Correct Answers prior to or w/in 3 yrs. After that it
should be done @ least every 3 yrs.
Owner cannot do. has to be engineer, env. health practitioner, member
of dept, HD, or septic contractor
Aerobic Treatment Unit Evaluations Correct Answers 1 every 6 mos @
least (same ppl) + HOMEOWNER as long as they follow manufacturer's
requirements & proper maintenance
What is the maint. schedule for SFs & WSPs w/ surface discharges?
Correct Answers @ least 1 per yr. + H.O. if rules r followed. Pumped
when solids & scum greater than 33%
Can a H.O. install & maintain a septic system on his/her property?
Correct Answers Yes
Who can perform the excavation for a septic system? Correct Answers
A licensed installer (employee while supervised) or the property owner.
What is the min. size tank for flows UP TO 500 gpd? Correct Answers
750 gals.
If flows are greater than 500 gpd, how do you size the tank? Correct
Answers Tank size should be = to @ least 1.5x the estimated sewage
flow
EXAMINATION PART 1 QUESTIONS WITH DETAILED VERIFIED AND
100% ACCURATE ANSWERS
Public Sewer Connection Correct Answers Private residence must
connect if w/in 300' or for any commercial bldg. w/in 300' that has flows
less than 1500 gpd. Commercial w/ flows = to or greater than 1500 gpd
must connect if sewer is w/in 1000'.
Unless physical barrier, ordinance, or cannot be done w/ individual line
(4" line)-then PSD system is OK.
Acceptable Pipe Materials Correct Answers Vitrified clay, ductile iron,
or plastic.
Anything after the tank or from distribution box has to be vitrified clay
or plastic.
Schedule 40 or Greater Correct Answers under roads, driveways, or
parking areas
Gravity Slope Correct Answers Diameter: 4" pipe + min. slope of 12"
per 100'
Building sewers in excess of 50' should have what? Correct Answers A
C/O @ least every 50' from building to tank, distribution box, or ATU
Creviced Limestone Formation Correct Answers SS system cannot be
installed where bottom of system is less than 4' from top of limestone
,If limestone is known to be present a soil test must be done @ least 4'
deeper than where the bottom of the trench will be
How far away can quick disconnect be? Correct Answers no more than
50' away from the device & w/in sight of
Experimental Use Permits Correct Answers min. of 10 experimental
systems installed b4 unconditional approval granted. Permit valid for 2
yrs & evaluated @ end of 2 yrs.
2 options for garbage grinders Correct Answers 1. solids retention tank
btwn WW source & septic tk. for kitchen waste only. Needs to be 50%
of the size of the designed septic tank w/ a min. of 500 gals.
2. A septic tank receiving all flows sized as 50% of the septic tank size +
septic tank size. i.e., septic tk = 1500 gals. /2 = 750 + 1500 = 2250
(would need 2500 gal tk)
How long should a homeowner keep maint. records for their system?
Correct Answers the life of the system
When should the 1st maintenance of a septic tank after installation be
completed for a residence? Correct Answers Prior to or within 3 yrs.
After initial inspection it can be done once every 5 yrs. Can be done by
everyone + homeowner
If sludge layer /suspended solids are greater than 33% . . . Correct
Answers Must pump tank and perform maintenance
, When should a septic system be evaluated initially after installation for a
non-residential bldg? Correct Answers prior to or w/in 3 yrs. After that it
should be done @ least every 3 yrs.
Owner cannot do. has to be engineer, env. health practitioner, member
of dept, HD, or septic contractor
Aerobic Treatment Unit Evaluations Correct Answers 1 every 6 mos @
least (same ppl) + HOMEOWNER as long as they follow manufacturer's
requirements & proper maintenance
What is the maint. schedule for SFs & WSPs w/ surface discharges?
Correct Answers @ least 1 per yr. + H.O. if rules r followed. Pumped
when solids & scum greater than 33%
Can a H.O. install & maintain a septic system on his/her property?
Correct Answers Yes
Who can perform the excavation for a septic system? Correct Answers
A licensed installer (employee while supervised) or the property owner.
What is the min. size tank for flows UP TO 500 gpd? Correct Answers
750 gals.
If flows are greater than 500 gpd, how do you size the tank? Correct
Answers Tank size should be = to @ least 1.5x the estimated sewage
flow
