Exam (elaborations)
Exam 3 - Commercial Contractor Exam (1).
- Course
- Institution
Exam 3 - Commercial Contractor Exam (1).
[Show more]
Seller
Follow
modockochieng06
Content preview
Exam 3 - Commercial Contractor Examconcrete
fiberglass
plastic - ANS-Septic Tank Materials
treatment capacity shall be sized for daily (24hr) peak flow volume of facility - ANS-Septic Tank
Sizing
the volume of the first compartment of the first treatment tank shall be at least 2/3rds the volume
of the total 24hr flow - ANS-septic tanks that are trained together under the parameter that__
1000 gallons - ANS-minimum septic tank size
increase by 50% - ANS-if garbage grinders/garbage disposals are used?
All tanks shall be equipped with 4" PVC, ASTM 3034 rated or equivalent T's at the inlet and
outlet end of the tank - ANS-"T's" and filters
so that they extend into the liquid a depth of minimum of 25% and maximum of 50% - ANS-T's
shall be constructed__
shall be equipped with an effluent filter designed to handle both the daily flow volume and
wastewater characteristics - ANS-outlet T's
shall be located 2" below the invert of the inlet T - ANS-Invert of outlet T
length is at least 1.5 times the width and have 2 compartments - ANS-Tank dimensions
will be located at a point not less than 2/3rds or more than 3/4ths the length of the tank from the
inlet end - ANS-Tank compartment partitions
a pass-thru hole or slot equal to or greater than the diameter of the inlet pipe is positioned below
the liquid surface 25-50% of total liquid depth - ANS-compartment partitions will be constructed
so__
Walls and bottom of poured-in-place septic tanks must be reinforced by using a 6x6" No.10
gage welded steel reinforcing wire or fibrous reinforcing material conforming to ASTM
specifications for such materials - ANS-construction standards for reinforcement
, must be reinforced using 3/8" steel reinforcing rods (rebar) which shall be spaced 12" on center
each way extending a minimum of 2.5" and a max of 3" from the outside edge of the tank -
ANS-tank lids
a uniform live load of 150lbs per square foot in addition to all loads which an underground tank
is normally subjected - ANS-tank must be able to withhold
shall be required when the loads on a concrete tank are exceeded by subjecting it to vehicular
traffic or when the top of the tank is placed deeper than 3ft below the finished grade -
ANS-additional reinforcement
4" - ANS-walls, bottoms, and lids poured-in-place septic tanks shall have a minimum thickness
of
one or two pieces and shall have securable, removable access openings located so the inlet
and outlet T's can be readily accessed - ANS-tank lids shall be constructed in, and shall have
shall be a minimum of 15" free space and maximum of 24"
Tanks with more than 12" of cover must extend access openings to within 12" of the ground
surface - ANS-Access openings
concrete used for poured-in-place or pre-cast septic tanks shall have a minimum 28-day
compressive strength of 4000 pounds per square inch - ANS-concrete specifications
may be helpful in eliminating "honeycombing" or "bridging" in the finished product -
ANS-Vibrating the forms or mix
onsite sewage management systems requiring 500 linear feet of field line or more must be
equipped with a dosing device - ANS-Dosing required
can be accomplished using pumps or siphons - ANS-dosing
required to have a single pump or siphon and a single absorption field - ANS-systems requiring
500' but less than 1000' linear feet of field line
must have alternating pumps or siphons along with alternating absorption fields - ANS-systems
requiring 1000' linear feet
one or two piece dosing tanks may be used
if two-piece: must be joined using mastic, butyl rubber, or other pliable sealant that is water
proof, corrosion resistant and approved for septic tank - ANS-dosing tank construction
requirements
length, width, or shape - ANS-What is not required for dosing tanks
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller modockochieng06. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
58993 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now