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REPORTING YEAR: 1992
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SILICON SYS. INC. 
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Breakdown of releases and waste generation (by chemical) follows:

Chemical Name: ACETONE
CAS Number: 000067641             (Name: SILICON SYS. INC.)
Maximum Amount On Site: 100 - 999 LBS                      (Year: 1992)
Medium        Release (lbs)    Destination or Method Used
------------  --------------   --------------------------
FUGITIVE AIR           1,740
STACK AIR              3,480
POTW WATER     (total below)   TO: CITY OF SANTA CRUZ PUBLIC WORKS DEPARTMENT
OFF-SITE              11,823   TO: SOLVENT SERVICES INC. 
                                   SAN JOSE, CA
                               USING: ENERGY RECOVERY                         
OFF-SITE                 149   TO: SOLVENT SERVICES INC. 
                                   SAN JOSE, CA
                               USING: INCINERATION/THERMAL TREATMENT          
POTW TOTAL             4,248   (Total for all POTW transfers)
Total                 21,440

Generation of production-related waste in lbs  (On=on-site, Off=off-site)-
Year: (*=projected)     1991           1992          1993*          1994*
Rel. or Disp:          6,491          5,220          2,770          2,770
Energy Off:            6,486         11,823              0              0
Treated Off:           2,974          4,397            150            150
Total:                15,951         21,440          2,920          2,920
Non-production-related waste:             0 (accidental or remedial)
Total waste generated       :        21,440 (Production & Non-Production)
Production Ratio:   1.60
    "Rel. or Disp" above = quantity released on-site or disposed off-site

Chemical Name: HYDROCHLORIC ACID
CAS Number: 007647010             (Name: SILICON SYS. INC.)
Maximum Amount On Site: 1,000 - 9,999 LBS                  (Year: 1992)
Medium        Release (lbs)    Destination or Method Used
------------  --------------   --------------------------
STACK AIR                 12
Total                     12

Generation of production-related waste in lbs  (On=on-site, Off=off-site)-
Year: (*=projected)     1991           1992          1993*          1994*
Rel. or Disp:            101             12             30             18
Treated On:           40,291        706,436        719,446        719,446
Total:                40,392        706,448        719,476        719,464
Non-production-related waste:             0 (accidental or remedial)
Total waste generated       :       706,448 (Production & Non-Production)
Production Ratio:   1.60
    "Rel. or Disp" above = quantity released on-site or disposed off-site

Chemical Name: HYDROGEN FLUORIDE
CAS Number: 007664393             (Name: SILICON SYS. INC.)
Maximum Amount On Site: 100 - 999 LBS                      (Year: 1992)
Medium        Release (lbs)    Destination or Method Used
------------  --------------   --------------------------
STACK AIR                 15
OFF-SITE                  38   TO: SOLVENT SERVICES INC. 
                                   SAN JOSE, CA
                               USING: WASTEWATER TREATMENT (EXCLUDING POTW)   
Total                     53

Generation of production-related waste in lbs  (On=on-site, Off=off-site)-
Year: (*=projected)     1991           1992          1993*          1994*
Rel. or Disp:              0             15             15             15
Treated On:                0         14,977         14,977         14,977
Treated Off:               0             38             38             38
Total:                     0         15,030         15,030         15,030
Non-production-related waste:             0 (accidental or remedial)
Total waste generated       :        15,030 (Production & Non-Production)
Production Ratio:   1.60
    "Rel. or Disp" above = quantity released on-site or disposed off-site

Chemical Name: PHOSPHORIC ACID
CAS Number: 007664382             (Name: SILICON SYS. INC.)
Maximum Amount On Site: 1,000 - 9,999 LBS                  (Year: 1992)
Medium        Release (lbs)    Destination or Method Used
------------  --------------   --------------------------
STACK AIR                  4
Total                      4

Generation of production-related waste in lbs  (On=on-site, Off=off-site)-
Year: (*=projected)     1991           1992          1993*          1994*
Rel. or Disp:              3              4              4              4
Treated On:           10,480         25,525         25,000         25,000
Total:                10,483         25,529         25,004         25,004
Non-production-related waste:             0 (accidental or remedial)
Total waste generated       :        25,529 (Production & Non-Production)
Production Ratio:   1.60
    "Rel. or Disp" above = quantity released on-site or disposed off-site

Chemical Name: SULFURIC ACID
CAS Number: 007664939             (Name: SILICON SYS. INC.)
Maximum Amount On Site: 10,000 - 99,999 LBS                (Year: 1992)
Medium        Release (lbs)    Destination or Method Used
------------  --------------   --------------------------
OFF-SITE                 926   TO: SOLVENT SERVICES INC. 
                                   SAN JOSE, CA
                               USING: WASTEWATER TREATMENT (EXCLUDING POTW)   
Total                    926

Generation of production-related waste in lbs  (On=on-site, Off=off-site)-
Year: (*=projected)     1991           1992          1993*          1994*
Treated On:          247,422        385,292        386,218        386,218
Treated Off:              66            926              0              0
Total:               247,488        386,218        386,218        386,218
Non-production-related waste:             0 (accidental or remedial)
Total waste generated       :       386,218 (Production & Non-Production)
Production Ratio:   1.60

Totals for all chemicals for SILICON SYS. INC. 
Releases and Transfers (in lbs) -
Fugitive air     :          1,740
Stack Air        :          3,511
POTW Transfer    :          4,248
Off-site Transfer:         12,936
Total            :         22,435                          (Year: 1992)
Amounts of production-related waste generated (in lbs, for current year)-
Released On-site or Disposed Off-site:          5,251
Burned for Energy Recovery Off-site  :         11,823
Treated On-site                      :      1,132,230
Treated Off-site                     :          5,361
Total Production-Related Waste       :      1,154,665
Total Non-Production-Related Waste   :              0
Total Waste Generated                :      1,154,665

This search was taken from RTK NET's (the Right-To-Know Network)'s copy of EPA's TRIS database. RTK NET is run by OMB Watch and Unison Institute at 1742 Connecticut Ave., NW, Washington DC, 20009 - Phone: 202-234-8494.

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