ENVIRONMENTAL COMPLIANCE
INSPECTOR GRADE 1 QUESTIONS AND
ANSWERS WITH SOLUTIONS 2024
An industry operating an 8-hour shift 5 days a week generates 100000 gallons of wastewater per shift.
Their pretreatment system has a capacity of 150 gallons per minute. How long must the pretreatment
system operate to process the wastewater generated each day? - ANSWER 11.1 hrs
What is the average detention time, in minutes, for a 40,000 gpd flow going through a 1500 gallon
interceptor. - ANSWER 54 minutes
What volume of spill containment capacity in gallons is needed for the following tanks if a 12 inch rainfall
occurs during a 24 hour period on a common 200 foot by 200 foot spill containment pad? Assume that
100% containment of all tank capacity is needed. - ANSWER
tank 1: 6ft wide, 6ft long 6ft high - ANSWER
tank 2: 4ft wide, 20 ft long, 3 ft high - ANSWER
tank 3: 8ft in diameter, and 9ft high. - ANSWER 305,992 gallons
A solution with a ph of 5 has a concentration of hydrogen ions that is how many times higher than a
solution with a ph of 7? - ANSWER 100 times higher
A solution of ferrous chloride used at a pretreatment facility contains 30 percent ferrous chloride and
has a density of 1.33 g/ml. How many grams of ferrous chloride are in one liter of the solution? -
ANSWER 399 grams per liter
What is the normality of a sodium hydroxide solution of 25 ml if a .01 N sulfuric acid solution neutrilizes
100 ml of the NaOH solution? - ANSWER .0025 N
The hardness determination measures? - ANSWER calcium and magnesium
, Sodium Hydroxide is commonly referred to as: - ANSWER Caustic soda
an industry has a wastewater discharge of 10000 gallons per day containing 5 mg/L of copper. What is
the industry's mass emission rate of copper in pounds per day? - ANSWER .42 lb/day
An industry has five sewer connections with the following discharges: - ANSWER
300gpd, 75gpd, 725gpd, 1200gpd, 200gpd - ANSWER
A flow weighted composite sample of 5 liters is desired. How much milliliters of sample from each
connection should be composited? - ANSWER 600, 150, 1450, 2400, 400
You have been directed to collect a 12 gour flow proportional sample. Using the following data, select
the volume of sample to be collected at 12:00 pm if a total sample volume of one liter is required. -
ANSWER
6am - ANSWER 5.8mgd
7am - ANSWER 6.4mgd
8am - ANSWER 6.8mgd
9am - ANSWER 7.2
10am - ANSWER 6.8
11 - ANSWER 7.2
12pm - ANSWER 9.0
INSPECTOR GRADE 1 QUESTIONS AND
ANSWERS WITH SOLUTIONS 2024
An industry operating an 8-hour shift 5 days a week generates 100000 gallons of wastewater per shift.
Their pretreatment system has a capacity of 150 gallons per minute. How long must the pretreatment
system operate to process the wastewater generated each day? - ANSWER 11.1 hrs
What is the average detention time, in minutes, for a 40,000 gpd flow going through a 1500 gallon
interceptor. - ANSWER 54 minutes
What volume of spill containment capacity in gallons is needed for the following tanks if a 12 inch rainfall
occurs during a 24 hour period on a common 200 foot by 200 foot spill containment pad? Assume that
100% containment of all tank capacity is needed. - ANSWER
tank 1: 6ft wide, 6ft long 6ft high - ANSWER
tank 2: 4ft wide, 20 ft long, 3 ft high - ANSWER
tank 3: 8ft in diameter, and 9ft high. - ANSWER 305,992 gallons
A solution with a ph of 5 has a concentration of hydrogen ions that is how many times higher than a
solution with a ph of 7? - ANSWER 100 times higher
A solution of ferrous chloride used at a pretreatment facility contains 30 percent ferrous chloride and
has a density of 1.33 g/ml. How many grams of ferrous chloride are in one liter of the solution? -
ANSWER 399 grams per liter
What is the normality of a sodium hydroxide solution of 25 ml if a .01 N sulfuric acid solution neutrilizes
100 ml of the NaOH solution? - ANSWER .0025 N
The hardness determination measures? - ANSWER calcium and magnesium
, Sodium Hydroxide is commonly referred to as: - ANSWER Caustic soda
an industry has a wastewater discharge of 10000 gallons per day containing 5 mg/L of copper. What is
the industry's mass emission rate of copper in pounds per day? - ANSWER .42 lb/day
An industry has five sewer connections with the following discharges: - ANSWER
300gpd, 75gpd, 725gpd, 1200gpd, 200gpd - ANSWER
A flow weighted composite sample of 5 liters is desired. How much milliliters of sample from each
connection should be composited? - ANSWER 600, 150, 1450, 2400, 400
You have been directed to collect a 12 gour flow proportional sample. Using the following data, select
the volume of sample to be collected at 12:00 pm if a total sample volume of one liter is required. -
ANSWER
6am - ANSWER 5.8mgd
7am - ANSWER 6.4mgd
8am - ANSWER 6.8mgd
9am - ANSWER 7.2
10am - ANSWER 6.8
11 - ANSWER 7.2
12pm - ANSWER 9.0
