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Contaminated water shall be sampled and analyzed both prior to and after
treatment. [Contaminated water produced from excavation operations and
tank pumping treated onsite, shall be analyzed for pH; benzene,
ethylbenzene, toluene, and xylene (BETX); total lead; oil and grease; total
petroleum hydrocarbons (TPH); and [_____]. Sampling and analysis shall be
performed prior to [discharge to the installation sanitary sewer]
[disposal] for every [_____] [200,000] L [_____] [50,000] gallons of
contaminated water treated.] [Analysis for contaminated water to be taken
to an off-site treatment facility shall conform to the requirements of the
treatment facility with documentation of all analyses performed furnished
to the Contracting Officer in accordance with paragraph RECORDS.
Contaminated water shall be contained, stored onsite, and analyzed [prior
to being transported to the approved treatment, storage and disposal
facility] [and disposed of by the Contractor in accordance with applicable
Federal and state disposal regulations].] The Contractor shall provide
approved containers, vehicles, equipment, labor, signs, labels, placards
and manifests and associated land disposal notices and notifications,
necessary for accomplishment of the work. Sampling and analyses of
contaminated water and treated water and the Contractor and laboratory
quality assurance program shall be in accordance with Section 01450A
CHEMICAL DATA QUALITY CONTROL.
3.5.2.2
Treatment
Contaminated water shall be treated [onsite] [off-site] by [oil water
separation] [_____] [filtering] [air stripping] [and] [activated carbon] or
other means as approved by the Contracting Officer. If contaminated water
is to be treated onsite, the proposed treatment shall be specified in the
Work Plan and submitted for approval. Temporary storage and treatment
equipment shall be installed [in the general vicinity of the tanks] at a
location approved by the Contracting Officer. Treated effluent shall be
sampled and analyzed and the results approved by the Contracting Officer
before discharge to [the sanitary sewer] [the surface] [_____]. Effluent
shall be treated and discharged in accordance with the discharge permit.
3.6
PURGING AND INERTING
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NOTE: Coordinate explosive limits with health
effects, especially for BTEX (benzene, toluene,
ethylbenzene, xylene) containing mixtures.
Coordinate with EM 1110-3-178, health and safety
specialists or industrial hygienists.
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After the tank and piping contents have been removed, but prior to
excavation beyond the top of the tank, the Contractor shall disconnect all
the piping (except the piping needed to purge or inert the tank).
Flammable and toxic vapors shall be purged from the tank or the tank made
inert in accordance with API RP 1604, with the exceptions that filling with
water shall not be used and, if dry ice is employed, the Contractor shall
use a minimum of 1.8 kg per 500 L 3 pounds per 100 gallons of tank volume.
The tank atmosphere shall be continuously monitored for combustible vapors
if the tank is purged, or continuously monitored for oxygen if the tank is
inerted.
SECTION 02115A
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