SISAPCD RULE 8.2 AERA. CONTAM. SOIL AND STORAGE TANKS, ETC.
LAST REVISED 01/01/89             
          
          
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          RULE 8.2 Aeration of Contaminated Soil and
                   Removal of Underground Storage Tanks
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          A. Purpose
             To  limit  the  emission of organic compounds from underground
             storage tanks and contaminated soil.

          B. Definitions

            1. Active Storage Pile
                A pile of contaminated  soil  to  which  soil  is currently
                being added or from which soil is currently being  removed.
                Activity  must  have  occurred  or  be anticipated to occur
                within one hour to be current.

            2. Aeration
                Exposure of excavated contaminated soil to the air.

            3. Aeration Depth
                The smaller of the following: the actual  average  depth of
                contaminated  soil;  or  6  inches  multiplied by the daily
                frequency with which soil is turned.   The  exposed surface
                area includes the pile of excavated soil unless the pile is
                covered.

            4. Aeration Volume
                The  volume  of  soil being aerated shall be calculated  as
                follows: the exposed  surface  area in square feet shall be
                multiplied by the aeration depth.

            5. Contaminated Soil
                Soil  which  has  an  organic  content   exceeding  50  ppm
                (weight).

            6. Organic Compound
                Any compound of carbon, excluding methane, carbon monoxide,
                carbon   dioxide,  carbonic  acid,  metallic  carbides   or
                carbonates and ammonium carbonate.

            7. Organic Content
                The concentration  of  organic  compounds  measured  in the
                composite   sample   collected   and   analyzed  using  the
                procedures specified by this rule.

            8. Vapor Free
                The process of purging gases from a tank  using  dry ice to
                replace organic vapors with an inert atmosphere.

            9. Ventilation
                The  process  of  purging  gases from a tank by blowing  or
                drawing another gas through the tank.

          C. Notification
             Five days prior to underground  tank  removal or excavation of
             contaminated soil, the person responsible  shall  give written
             notification to the District.

          D. Underground Storage Tank Removal
             Any  person wishing to permanently decommission an underground
             storage  tank  which  previously  contained  organic compounds
             shall follow the following procedure:

            1.  All piping shall be drained and flushed into  the  tank  or
                other container.

            2.  All  liquids  and  sludges  shall be removed, to the extent
                possible, from the tank.  It may be necessary to use a hand
                pump to remove the bottom few inches of product.
            3.  Vapors  shall be removed from  the  tank  by  either  vapor
                freeing or ventilation.

            4.  No person  shall  ventilate or vapor free a tank containing
                more than 0.001 gallons  of  liquid  organic  compounds per
                gallon   of  tank  capacity  unless  emissions  of  organic
                compounds  to the atmosphere are controlled by equipment or
                control schemes which demonstrate a combined collection and
                destruction  efficiency  of  90%  by  weight.   All control
                equipment and control schemes subject to this section shall
                have written District approval prior to operation.

          E. Excavation of Contaminated Soil
             The  person responsible for aeration of any contaminated  soil
             shall  provide  the District with the following information no
             less than 24 hours  prior  to  the spreading or heating of any
             contaminated soil:

            1.  The maximum total quantity of soil to be aerated.

            2.  The maximum quantity of soil to be aerated per day.

            3.  The maximum degree of contamination.

            4.  The chemical composition of contaminating organic compounds
                (e.g., benzene, methylene chloride, etc.).

            5.  A description of the basis from  which these estimates were
                derived   (soil   analysis,   Soil   Vapor    Contamination
                Assessment, etc.).

             The District shall be notified within 24 hours if  any  of the
             parameters  change.  During  excavation  and  aeration,  daily
             records  shall  be  kept of the total quantity of soil and the
             organic content of soil that is aerated each day.

          F. Uncontrolled Aeration
             A person shall not aerate  contaminated  soil  at  a  rate  in
             excess  of that specified in Table 1 for the degree of organic
             content.   The  limitations  in  Table  1  apply to the entire
             facility,  and indicate the volume of contaminated  soil  that
             may be added,  on  any  one  day,  to  soil  that  is  already
             aerating.

                                         Table 1
                        Allowable Rate of Uncontrolled Aeration

                   ORGANIC CONTENT        RATE OF UNCONTROLLED AERATION
                     PPM (weight)                Cubic yards/day
                         <50                         No Limit
                       50 - 100                        600
                      100 - 500                        120
                      500 - 1000                        60
                     1000 - 2000                        30
                     2000 - 3000                        15
                     3000 - 4000                        10
                     4000 - 5000                         8
                        >5000                            0.1

          G. Controlled Aeration
             Soil  may  be  aerated  at  rates exceeding the limitations of
             Table  I  provided  emissions  of  organic  compounds  to  the
             atmosphere  are  controlled by equipment  or  control  schemes
             which  demonstrate   a  combined  collection  and  destruction
             efficiency  of  90%  by weight.   All  control  equipment  and
             control schemes subject  to  this  section  shall have written
             District approval prior to operation.

          H. Storage Piles
             Contaminated soil which is not being aerated  shall be covered
             except when soil is being added or removed.  No  more than 10%
             of the storage pile or 20 cubic yards may be uncovered  at any
             time  without  prior  consent  of  the  Control  Officer.  Any
             uncovered contaminated soil will be considered to  be aerated.
             The soil may be covered with a layer of uncontaminated soil no
             less than six inches deep; or it may be covered with a tarp or
             other  covering,  provided  no  head  space  where vapors  may
             accumulate is formed.

          I. Exemptions

            1. Storage Piles
                Calculations  of aeration volume shall not include  storage
                piles  that are  covered  nor  shall  they  include  active
                storage piles.

            2. Excavated Hole
                The exposed  surface  of  an  excavated  hole  shall not be
                included in calculations of aerated volume.

            3. Sampling
                Contaminated soil exposed for the sole purpose of  sampling
                shall not be considered to be aerated.  No more than 10% of
                the  contaminated soil or 20 cubic yards may be exposed  at
                any time  without  prior  consent  of  the Control Officer.
                Removal of soil for sampling shall not qualify  a  pile  as
                "active".

            4. Non-volatile Hydrocarbons
                The  requirements  of this rule shall not apply if the only
                soil  contamination is  by  a  known  organic  chemical  or
                petroleum  liquid,  and  that  chemical  or  liquid  has an
                initial boiling point of 302F or higher, provided that the
                soil is not heated.

          J. Soil Sampling
             One composite sample shall be collected and analyzed for every
             50  cubic  yards of excavated contaminated soil to be aerated.
             At least one  composite  sample  shall  be collected from each
             inactive,   uncovered   storage  pile  within  24   hours   of
             excavation.  Samples  are  not   required   if   the  soil  is
             uncontaminated.

            1.  A composite sample shall consist of one sample  taken  from
                the  center of each of 4 equal sectors of the area required
                to be  sampled  using the procedures described below unless
                other methods are approved by the Control Officer.

            2.  Samples shall be taken from at least three inches below the
                surface  of the pile  using  a  driven-tube  type  sampler,
                capped and sealed with inert materials, and extruded in the
                lab in order  to  reduce the loss of volatile materials; or
                by using a clean brass  tube  (at  least three inches long)
                driven into the soil with a suitable  instrument.  The ends
                of the brass tube shall than be covered with aluminum foil,
                then plastic end caps, and finally wrapped  with a suitable
                tape.  The samples shall then be immediately placed on ice,
                or dry ice, for transport to a laboratory.

          K. Measurement of Organic Content
             Organic  content  of  soil  shall  be  determined  by the  EPA
             Reference Method 8010 or 8015, Regional Water Quality  Control
             Board's Revised Analytical Methods, Attachment 2, 11/8/85,  or
             other methods approved by the Control Officer.

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