Agenda packet — Orange City Council, April 11, 2023 (part 10 of 14)

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ANALYTICAL REPORT FOR SAMPLES
Date Received
AA-1 E804014-01 Vapor 30-Mar-18 03-Apr-18
AA-2 E804014-02 Vapor 30-Mar-18 03-Apr-18
IA-1 E804014-03 Vapor 30-Mar-18 03-Apr-18
IA-2 E804014-04 Vapor 30-Mar-18 03-Apr-18
IA-2 Duplicate E804014-05 Vapor 30-Mar-18 03-Apr-18

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Result Analyte Limit
Reporting
Units
Dilution
MDL Factor Batch Prepared Analyzed Method Notes
AA-1 (E804014-01) Vapor Sampled: 30-Mar-18 Received: 03-Apr-18 J- Report Dichlorodifluoromethane (F12) 1.4 0.10 1.0 ug/m3 1 ED80415 05-Apr-18 05-Apr-18 EPA TO-15 Chloromethane 1.0 0.03 0.21 " " " " " "
Dichlorotetrafluoroethane (F114) 0.07 0.07 0.71 " " " " " " J Vinyl chloride ND 0.03 0.13 " " " " " "
Bromomethane 0.08 0.04 0.39 " " " " " " J
Chloroethane ND 0.05 0.27 " " " " " "
Trichlorofluoromethane (F11) 1.2 0.06 0.56 " " " " " "
1,1-Dichloroethene ND 0.04 0.40 " " " " " "
1,1,2-Trichlorotrifluoroethane (F113) 0.54 0.08 0.77 " " " " " " J Methylene chloride (Dichloromethane) 0.71 0.04 0.35 " " " " " " Carbon disulfide 0.03 0.03 0.32 " " " " " " J
trans-1,2-Dichloroethene ND 0.04 0.40 " " " " " "
1,1-Dichloroethane ND 0.04 0.41 " " " " " "
2-Butanone (MEK) 1.8 0.06 0.60 " " " " " "
cis-1,2-Dichloroethene ND 0.04 0.40 " " " " " "
Chloroform 0.25 0.05 0.25 " " " " " "
1,1,1-Trichloroethane ND 0.06 0.55 " " " " " "
1,2-Dichloroethane (EDC) 0.08 0.04 0.41 " " " " " " J
Benzene 1.1 0.03 0.16 " " " " " "
Carbon tetrachloride 0.45 0.06 0.32 " " " " " "
Trichloroethene ND 0.06 0.55 " " " " " "
1,2-Dichloropropane ND 0.05 0.47 " " " " " "
Bromodichloromethane ND 0.07 0.68 " " " " " "
cis-1,3-Dichloropropene ND 0.05 0.46 " " " " " "
4-Methyl-2-pentanone (MIBK) 0.25 0.08 0.83 " " " " " " J trans-1,3-Dichloropropene ND 0.05 0.46 " " " " " "
Toluene 3.1 0.08 0.76 " " " " " "
1,1,2-Trichloroethane ND 0.06 0.55 " " " " " "
2-Hexanone (MBK) 0.33 0.08 0.83 " " " " " " J
Dibromochloromethane ND 0.09 1.7 " " " " " "
Tetrachloroethene 0.07 0.07 0.69 " " " " " " J
1,2-Dibromoethane (EDB) ND 0.08 0.78 " " " " " "
1,1,1,2-Tetrachloroethane ND 0.07 0.70 " " " " " "
Chlorobenzene ND 0.05 0.47 " " " " " "
Ethylbenzene 0.40 0.04 0.44 " " " " " " J
m,p-Xylene 1.5 0.04 0.44 " " " " " "

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Result Analyte Limit
Reporting
Units
Dilution
MDL Factor Batch Prepared Analyzed Method Notes
AA-1 (E804014-01) Vapor Sampled: 30-Mar-18 Received: 03-Apr-18 J- Report Styrene 0.22 0.04 0.43 ug/m3 1 ED80415 05-Apr-18 05-Apr-18 EPA TO-15 J o-Xylene 0.57 0.04 0.44 " " " " " "
Bromoform ND 0.10 1.0 " " " " " "
1,1,2,2-Tetrachloroethane ND 0.07 0.70 " " " " " "
4-Ethyltoluene 0.20 0.05 0.50 " " " " " " J
1,3,5-Trimethylbenzene 0.15 0.05 0.50 " " " " " " J
1,2,4-Trimethylbenzene 0.60 0.05 0.50 " " " " " "
1,3-Dichlorobenzene ND 0.06 0.61 " " " " " "
1,4-Dichlorobenzene 0.12 0.06 0.61 " " " " " " J
1,2-Dichlorobenzene ND 0.06 0.61 " " " " " "
Naphthalene 0.32 0.05 0.53 " " " " " " B-03, J
1,2,4-Trichlorobenzene 0.15 0.08 1.9 " " " " " " J, B-03 Hexachlorobutadiene 0.21 0.21 2.7 " " " " " " J
Surrogate: 1,2-Dichloroethane-d4 116 % 76-134 " " " "
Surrogate: Toluene-d8 108 % 78-125 " " " "
Surrogate: 4-Bromofluorobenzene 87.7 % 77-127 " " " "
AA-2 (E804014-02) Vapor Sampled: 30-Mar-18 Received: 03-Apr-18 J- Report Dichlorodifluoromethane (F12) 1.3 0.10 1.0 ug/m3 1 ED80415 05-Apr-18 05-Apr-18 EPA TO-15 Chloromethane 1.2 0.03 0.21 " " " " " "
Dichlorotetrafluoroethane (F114) 0.07 0.07 0.71 " " " " " " J Vinyl chloride ND 0.03 0.13 " " " " " "
Bromomethane 0.08 0.04 0.39 " " " " " " J
Chloroethane ND 0.05 0.27 " " " " " "
Trichlorofluoromethane (F11) 0.96 0.06 0.56 " " " " " " 1,1-Dichloroethene ND 0.04 0.40 " " " " " "
1,1,2-Trichlorotrifluoroethane (F113) 0.62 0.08 0.77 " " " " " " J Methylene chloride (Dichloromethane) 0.78 0.04 0.35 " " " " " " Carbon disulfide 0.06 0.03 0.32 " " " " " " J
trans-1,2-Dichloroethene ND 0.04 0.40 " " " " " "
1,1-Dichloroethane ND 0.04 0.41 " " " " " "
2-Butanone (MEK) 1.4 0.06 0.60 " " " " " "
cis-1,2-Dichloroethene ND 0.04 0.40 " " " " " "
Chloroform 0.30 0.05 0.25 " " " " " "
1,1,1-Trichloroethane ND 0.06 0.55 " " " " " "
1,2-Dichloroethane (EDC) 0.12 0.04 0.41 " " " " " " J

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Result Analyte Limit
Reporting
Units
Dilution
MDL Factor Batch Prepared Analyzed Method Notes
AA-2 (E804014-02) Vapor Sampled: 30-Mar-18 Received: 03-Apr-18 J- Report Benzene 1.1 0.03 0.16 ug/m3 1 ED80415 05-Apr-18 05-Apr-18 EPA TO-15 Carbon tetrachloride 0.45 0.06 0.32 " " " " " "
Trichloroethene ND 0.06 0.55 " " " " " "
1,2-Dichloropropane ND 0.05 0.47 " " " " " "
Bromodichloromethane ND 0.07 0.68 " " " " " "
cis-1,3-Dichloropropene ND 0.05 0.46 " " " " " "
4-Methyl-2-pentanone (MIBK) 0.21 0.08 0.83 " " " " " " J trans-1,3-Dichloropropene ND 0.05 0.46 " " " " " "
Toluene 3.4 0.08 0.76 " " " " " "
1,1,2-Trichloroethane ND 0.06 0.55 " " " " " "
2-Hexanone (MBK) ND 0.08 0.83 " " " " " "
Dibromochloromethane ND 0.09 1.7 " " " " " "
Tetrachloroethene 0.14 0.07 0.69 " " " " " " J
1,2-Dibromoethane (EDB) ND 0.08 0.78 " " " " " "
1,1,1,2-Tetrachloroethane ND 0.07 0.70 " " " " " "
Chlorobenzene ND 0.05 0.47 " " " " " "
Ethylbenzene 0.44 0.04 0.44 " " " " " "
m,p-Xylene 1.6 0.04 0.44 " " " " " "
Styrene 0.22 0.04 0.43 " " " " " " J
o-Xylene 0.62 0.04 0.44 " " " " " "
Bromoform ND 0.10 1.0 " " " " " "
1,1,2,2-Tetrachloroethane ND 0.07 0.70 " " " " " "
4-Ethyltoluene 0.15 0.05 0.50 " " " " " " J
1,3,5-Trimethylbenzene 0.20 0.05 0.50 " " " " " " J
1,2,4-Trimethylbenzene 0.60 0.05 0.50 " " " " " "
1,3-Dichlorobenzene ND 0.06 0.61 " " " " " "
1,4-Dichlorobenzene 0.06 0.06 0.61 " " " " " " J
1,2-Dichlorobenzene ND 0.06 0.61 " " " " " "
Naphthalene 0.37 0.05 0.53 " " " " " " B-03, J
1,2,4-Trichlorobenzene 0.08 0.08 1.9 " " " " " " B-03, J Hexachlorobutadiene ND 0.21 2.7 " " " " " "
Surrogate: 1,2-Dichloroethane-d4 114 % 76-134 " " " "
Surrogate: Toluene-d8 109 % 78-125 " " " "
Surrogate: 4-Bromofluorobenzene 85.5 % 77-127 " " " "

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Result Analyte Limit
Reporting
Units
Dilution
MDL Factor Batch Prepared Analyzed Method Notes
IA-1 (E804014-03) Vapor Sampled: 30-Mar-18 Received: 03-Apr-18 J- Report Dichlorodifluoromethane (F12) 1.4 0.10 1.0 ug/m3 1 ED80415 05-Apr-18 05-Apr-18 EPA TO-15 Chloromethane 1.3 0.03 0.21 " " " " " "
Dichlorotetrafluoroethane (F114) 0.07 0.07 0.71 " " " " " " J Vinyl chloride ND 0.03 0.13 " " " " " "
Bromomethane 0.08 0.04 0.39 " " " " " " J
Chloroethane ND 0.05 0.27 " " " " " "
Trichlorofluoromethane (F11) 1.0 0.06 0.56 " " " " " "
1,1-Dichloroethene ND 0.04 0.40 " " " " " "
1,1,2-Trichlorotrifluoroethane (F113) 0.62 0.08 0.77 " " " " " " J Methylene chloride (Dichloromethane) 0.85 0.04 0.35 " " " " " " Carbon disulfide 0.13 0.03 0.32 " " " " " " J
trans-1,2-Dichloroethene ND 0.04 0.40 " " " " " "
1,1-Dichloroethane ND 0.04 0.41 " " " " " "
2-Butanone (MEK) 7.0 0.06 0.60 " " " " " "
cis-1,2-Dichloroethene ND 0.04 0.40 " " " " " "
Chloroform 1.4 0.05 0.25 " " " " " "
1,1,1-Trichloroethane ND 0.06 0.55 " " " " " "
1,2-Dichloroethane (EDC) 0.25 0.04 0.41 " " " " " " J
Benzene 1.3 0.03 0.16 " " " " " "
Carbon tetrachloride 0.51 0.06 0.32 " " " " " "
Trichloroethene ND 0.06 0.55 " " " " " "
1,2-Dichloropropane ND 0.05 0.47 " " " " " "
Bromodichloromethane ND 0.07 0.68 " " " " " "
cis-1,3-Dichloropropene ND 0.05 0.46 " " " " " "
4-Methyl-2-pentanone (MIBK) 0.33 0.08 0.83 " " " " " " J trans-1,3-Dichloropropene ND 0.05 0.46 " " " " " "
Toluene 7.2 0.08 0.76 " " " " " "
1,1,2-Trichloroethane ND 0.06 0.55 " " " " " "
2-Hexanone (MBK) 0.62 0.08 0.83 " " " " " " J
Dibromochloromethane 0.09 0.09 1.7 " " " " " " J
Tetrachloroethene 0.28 0.07 0.69 " " " " " " J
1,2-Dibromoethane (EDB) ND 0.08 0.78 " " " " " "
1,1,1,2-Tetrachloroethane ND 0.07 0.70 " " " " " "
Chlorobenzene ND 0.05 0.47 " " " " " "
Ethylbenzene 0.66 0.04 0.44 " " " " " "
m,p-Xylene 1.9 0.04 0.44 " " " " " "

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Result Analyte Limit
Reporting
Units
Dilution
MDL Factor Batch Prepared Analyzed Method Notes
IA-1 (E804014-03) Vapor Sampled: 30-Mar-18 Received: 03-Apr-18 J- Report Styrene 1.3 0.04 0.43 ug/m3 1 ED80415 05-Apr-18 05-Apr-18 EPA TO-15 o-Xylene 0.70 0.04 0.44 " " " " " "
Bromoform ND 0.10 1.0 " " " " " "
1,1,2,2-Tetrachloroethane ND 0.07 0.70 " " " " " "
4-Ethyltoluene 0.25 0.05 0.50 " " " " " " J
1,3,5-Trimethylbenzene 0.20 0.05 0.50 " " " " " " J
1,2,4-Trimethylbenzene 0.85 0.05 0.50 " " " " " "
1,3-Dichlorobenzene ND 0.06 0.61 " " " " " "
1,4-Dichlorobenzene 0.12 0.06 0.61 " " " " " " J
1,2-Dichlorobenzene ND 0.06 0.61 " " " " " "
Naphthalene 0.48 0.05 0.53 " " " " " " B-03, J
1,2,4-Trichlorobenzene 0.08 0.08 1.9 " " " " " " B-03, J Hexachlorobutadiene 0.54 0.21 2.7 " " " " " " J
Surrogate: 1,2-Dichloroethane-d4 123 % 76-134 " " " "
Surrogate: Toluene-d8 109 % 78-125 " " " "
Surrogate: 4-Bromofluorobenzene 89.2 % 77-127 " " " "
IA-2 (E804014-04) Vapor Sampled: 30-Mar-18 Received: 03-Apr-18 J- Report Dichlorodifluoromethane (F12) 1.4 0.10 1.0 ug/m3 1 ED80415 05-Apr-18 05-Apr-18 EPA TO-15 Chloromethane 1.1 0.03 0.21 " " " " " "
Dichlorotetrafluoroethane (F114) 0.07 0.07 0.71 " " " " " " J Vinyl chloride ND 0.03 0.13 " " " " " "
Bromomethane 0.08 0.04 0.39 " " " " " " J
Chloroethane ND 0.05 0.27 " " " " " "
Trichlorofluoromethane (F11) 0.90 0.06 0.56 " " " " " " 1,1-Dichloroethene ND 0.04 0.40 " " " " " "
1,1,2-Trichlorotrifluoroethane (F113) 0.62 0.08 0.77 " " " " " " J Methylene chloride (Dichloromethane) 0.74 0.04 0.35 " " " " " " Carbon disulfide 0.16 0.03 0.32 " " " " " " J
trans-1,2-Dichloroethene ND 0.04 0.40 " " " " " "
1,1-Dichloroethane ND 0.04 0.41 " " " " " "
2-Butanone (MEK) 3.1 0.06 0.60 " " " " " "
cis-1,2-Dichloroethene ND 0.04 0.40 " " " " " "
Chloroform 0.84 0.05 0.25 " " " " " "
1,1,1-Trichloroethane ND 0.06 0.55 " " " " " "
1,2-Dichloroethane (EDC) 0.16 0.04 0.41 " " " " " " J

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Result Analyte Limit
Reporting
Units
Dilution
MDL Factor Batch Prepared Analyzed Method Notes
IA-2 (E804014-04) Vapor Sampled: 30-Mar-18 Received: 03-Apr-18 J- Report Benzene 1.2 0.03 0.16 ug/m3 1 ED80415 05-Apr-18 05-Apr-18 EPA TO-15 Carbon tetrachloride 0.45 0.06 0.32 " " " " " "
Trichloroethene ND 0.06 0.55 " " " " " "
1,2-Dichloropropane ND 0.05 0.47 " " " " " "
Bromodichloromethane ND 0.07 0.68 " " " " " "
cis-1,3-Dichloropropene ND 0.05 0.46 " " " " " "
4-Methyl-2-pentanone (MIBK) 0.33 0.08 0.83 " " " " " " J trans-1,3-Dichloropropene ND 0.05 0.46 " " " " " "
Toluene 4.5 0.08 0.76 " " " " " "
1,1,2-Trichloroethane ND 0.06 0.55 " " " " " "
2-Hexanone (MBK) 0.33 0.08 0.83 " " " " " " J
Dibromochloromethane ND 0.09 1.7 " " " " " "
Tetrachloroethene 0.14 0.07 0.69 " " " " " " J
1,2-Dibromoethane (EDB) ND 0.08 0.78 " " " " " "
1,1,1,2-Tetrachloroethane ND 0.07 0.70 " " " " " "
Chlorobenzene ND 0.05 0.47 " " " " " "
Ethylbenzene 0.48 0.04 0.44 " " " " " "
m,p-Xylene 1.7 0.04 0.44 " " " " " "
Styrene 0.69 0.04 0.43 " " " " " "
o-Xylene 0.62 0.04 0.44 " " " " " "
Bromoform ND 0.10 1.0 " " " " " "
1,1,2,2-Tetrachloroethane ND 0.07 0.70 " " " " " "
4-Ethyltoluene 0.15 0.05 0.50 " " " " " " J
1,3,5-Trimethylbenzene 0.20 0.05 0.50 " " " " " " J
1,2,4-Trimethylbenzene 0.65 0.05 0.50 " " " " " "
1,3-Dichlorobenzene ND 0.06 0.61 " " " " " "
1,4-Dichlorobenzene 0.06 0.06 0.61 " " " " " " J
1,2-Dichlorobenzene ND 0.06 0.61 " " " " " "
Naphthalene 0.37 0.05 0.53 " " " " " " B-03, J
1,2,4-Trichlorobenzene ND 0.08 1.9 " " " " " " B-03
Hexachlorobutadiene ND 0.21 2.7 " " " " " "
Surrogate: 1,2-Dichloroethane-d4 116 % 76-134 " " " "
Surrogate: Toluene-d8 109 % 78-125 " " " "
Surrogate: 4-Bromofluorobenzene 88.9 % 77-127 " " " "

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Result Analyte Limit
Reporting
Units
Dilution
MDL Factor Batch Prepared Analyzed Method Notes
IA-2 Duplicate (E804014-05) Vapor Sampled: 30-Mar-18 Received: 03-Apr-18 J- Report Dichlorodifluoromethane (F12) 1.3 0.10 1.0 ug/m3 1 ED80415 05-Apr-18 05-Apr-18 EPA TO-15 Chloromethane 1.2 0.03 0.21 " " " " " "
Dichlorotetrafluoroethane (F114) 0.07 0.07 0.71 " " " " " " J Vinyl chloride ND 0.03 0.13 " " " " " "
Bromomethane 0.08 0.04 0.39 " " " " " " J
Chloroethane ND 0.05 0.27 " " " " " "
Trichlorofluoromethane (F11) 0.90 0.06 0.56 " " " " " " 1,1-Dichloroethene ND 0.04 0.40 " " " " " "
1,1,2-Trichlorotrifluoroethane (F113) 0.54 0.08 0.77 " " " " " " J Methylene chloride (Dichloromethane) 0.81 0.04 0.35 " " " " " " Carbon disulfide 0.06 0.03 0.32 " " " " " " J
trans-1,2-Dichloroethene ND 0.04 0.40 " " " " " "
1,1-Dichloroethane ND 0.04 0.41 " " " " " "
2-Butanone (MEK) 3.9 0.06 0.60 " " " " " "
cis-1,2-Dichloroethene ND 0.04 0.40 " " " " " "
Chloroform 0.84 0.05 0.25 " " " " " "
1,1,1-Trichloroethane ND 0.06 0.55 " " " " " "
1,2-Dichloroethane (EDC) 0.16 0.04 0.41 " " " " " " J
Benzene 1.2 0.03 0.16 " " " " " "
Carbon tetrachloride 0.45 0.06 0.32 " " " " " "
Trichloroethene ND 0.06 0.55 " " " " " "
1,2-Dichloropropane ND 0.05 0.47 " " " " " "
Bromodichloromethane ND 0.07 0.68 " " " " " "
cis-1,3-Dichloropropene ND 0.05 0.46 " " " " " "
4-Methyl-2-pentanone (MIBK) 0.46 0.08 0.83 " " " " " " J trans-1,3-Dichloropropene ND 0.05 0.46 " " " " " "
Toluene 4.9 0.08 0.76 " " " " " "
1,1,2-Trichloroethane ND 0.06 0.55 " " " " " "
2-Hexanone (MBK) 0.46 0.08 0.83 " " " " " " J
Dibromochloromethane ND 0.09 1.7 " " " " " "
Tetrachloroethene 0.14 0.07 0.69 " " " " " " J
1,2-Dibromoethane (EDB) ND 0.08 0.78 " " " " " "
1,1,1,2-Tetrachloroethane ND 0.07 0.70 " " " " " "
Chlorobenzene ND 0.05 0.47 " " " " " "
Ethylbenzene 0.48 0.04 0.44 " " " " " "
m,p-Xylene 1.6 0.04 0.44 " " " " " "

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Result Analyte Limit
Reporting
Units
Dilution
MDL Factor Batch Prepared Analyzed Method Notes
IA-2 Duplicate (E804014-05) Vapor Sampled: 30-Mar-18 Received: 03-Apr-18 J- Report Styrene 0.65 0.04 0.43 ug/m3 1 ED80415 05-Apr-18 05-Apr-18 EPA TO-15 o-Xylene 0.62 0.04 0.44 " " " " " "
Bromoform ND 0.10 1.0 " " " " " "
1,1,2,2-Tetrachloroethane ND 0.07 0.70 " " " " " "
4-Ethyltoluene 0.15 0.05 0.50 " " " " " " J
1,3,5-Trimethylbenzene 0.20 0.05 0.50 " " " " " " J
1,2,4-Trimethylbenzene 0.65 0.05 0.50 " " " " " "
1,3-Dichlorobenzene ND 0.06 0.61 " " " " " "
1,4-Dichlorobenzene 0.06 0.06 0.61 " " " " " " J
1,2-Dichlorobenzene ND 0.06 0.61 " " " " " "
Naphthalene 0.27 0.05 0.53 " " " " " " B-03, J
1,2,4-Trichlorobenzene ND 0.08 1.9 " " " " " " B-03
Hexachlorobutadiene ND 0.21 2.7 " " " " " "
Surrogate: 1,2-Dichloroethane-d4 116 % 76-134 " " " "
Surrogate: Toluene-d8 108 % 78-125 " " " "
Surrogate: 4-Bromofluorobenzene 88.1 % 77-127 " " " "

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Reported:

SCS Engineers - Long Beach
3900 Kilroy Airport Way, Suite 100
SCS040318-12
01214273.03/ 840 The City Drive S
Long Beach, CA 90806-6816 Mr. Justin Rauzon 10-Apr-18 16:17 H&P Mobile
Geochemistry Inc.
2470 Impala Drive
Carlsbad, CA 92010
760-804-9678 Phone
760-804-9159 Fax
Result Limit
Reporting
Units Level
Spike
Result
Source
%REC
%REC
Limits RPD
RPD
Analyte Limit Notes
Volatile Organic Compounds by EPA TO-15 - Quality Control H&P Mobile Geochemistry, Inc.

Batch ED80415 - TO-15
Blank (ED80415-BLK1) Prepared & Analyzed: 05-Apr-18
Dichlorodifluoromethane (F12) ND 1.0 ug/m3
Chloromethane ND 0.21 "
Dichlorotetrafluoroethane (F114) ND 0.71 "
Vinyl chloride ND 0.13 "
Bromomethane ND 0.39 "
Chloroethane ND 0.27 "
Trichlorofluoromethane (F11) ND 0.56 "
1,1-Dichloroethene ND 0.40 "
1,1,2-Trichlorotrifluoroethane (F113) ND 0.77 "
Methylene chloride (Dichloromethane) ND 0.35 "
Carbon disulfide ND 0.32 "
trans-1,2-Dichloroethene ND 0.40 "
1,1-Dichloroethane ND 0.41 "
2-Butanone (MEK) ND 0.60 "
cis-1,2-Dichloroethene ND 0.40 "
Chloroform ND 0.25 "
1,1,1-Trichloroethane ND 0.55 "
1,2-Dichloroethane (EDC) ND 0.41 "
Benzene ND 0.16 "
Carbon tetrachloride ND 0.32 "
Trichloroethene ND 0.55 "
1,2-Dichloropropane ND 0.47 "
Bromodichloromethane ND 0.68 "
cis-1,3-Dichloropropene ND 0.46 "
4-Methyl-2-pentanone (MIBK) ND 0.83 "
trans-1,3-Dichloropropene ND 0.46 "
Toluene ND 0.76 "
1,1,2-Trichloroethane ND 0.55 "
2-Hexanone (MBK) ND 0.83 "
Dibromochloromethane ND 1.7 "
Tetrachloroethene ND 0.69 "
1,2-Dibromoethane (EDB) ND 0.78 "
1,1,1,2-Tetrachloroethane ND 0.70 "
Chlorobenzene ND 0.47 "

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Project Number:

Project Manager:

Reported:

Batch ED80415 - TO-15
Blank (ED80415-BLK1) Prepared & Analyzed: 05-Apr-18
Ethylbenzene ND 0.44 ug/m3
m,p-Xylene ND 0.44 "
Styrene ND 0.43 "
o-Xylene ND 0.44 "
Bromoform ND 1.0 "
1,1,2,2-Tetrachloroethane ND 0.70 "
4-Ethyltoluene ND 0.50 "
1,3,5-Trimethylbenzene ND 0.50 "
1,2,4-Trimethylbenzene ND 0.50 "
1,3-Dichlorobenzene ND 0.61 "
1,4-Dichlorobenzene ND 0.61 "
1,2-Dichlorobenzene ND 0.61 "
Naphthalene 0.05 0.53 " B-03, J
1,2,4-Trichlorobenzene 0.08 1.9 " B-03, J
Hexachlorobutadiene ND 2.7 "
Surrogate: 1,2-Dichloroethane-d4 48.1 " 42.9 112 76-134 Surrogate: Toluene-d8 44.7 " 41.4 108 78-125
Surrogate: 4-Bromofluorobenzene 57.5 " 72.9 78.9 77-127 LCS (ED80415-BS1) Prepared & Analyzed: 05-Apr-18
Dichlorodifluoromethane (F12) 17.8 1.0 ug/m3 20.2 88.1 59-128 Vinyl chloride 9.62 0.13 " 10.4 92.5 64-127
Chloroethane 8.45 0.27 " 10.7 78.9 63-127
Trichlorofluoromethane (F11) 20.9 0.56 " 22.6 92.4 62-126 1,1-Dichloroethene 20.0 0.40 " 16.2 123 61-133
1,1,2-Trichlorotrifluoroethane (F113) 32.2 0.77 " 31.0 104 66-126 Methylene chloride (Dichloromethane) 16.2 0.35 " 14.2 114 62-115 trans-1,2-Dichloroethene 18.0 0.40 " 16.2 112 67-124
1,1-Dichloroethane 18.8 0.41 " 16.5 114 68-126
cis-1,2-Dichloroethene 18.4 0.40 " 16.0 115 70-121
Chloroform 20.5 0.25 " 19.8 103 68-123
1,1,1-Trichloroethane 20.2 0.55 " 22.2 91.0 68-125
1,2-Dichloroethane (EDC) 17.4 0.41 " 16.5 106 65-128

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Project:

Project Number:

Project Manager:

Reported:

Batch ED80415 - TO-15
LCS (ED80415-BS1) Prepared & Analyzed: 05-Apr-18
Benzene 14.8 0.16 ug/m3 13.0 114 69-119
Carbon tetrachloride 22.5 0.32 " 25.6 88.1 68-132
Trichloroethene 21.5 0.55 " 21.9 98.2 71-123
Toluene 14.9 0.76 " 15.4 96.9 66-119
1,1,2-Trichloroethane 21.3 0.55 " 22.2 96.0 73-119
Tetrachloroethene 27.4 0.69 " 27.6 99.3 66-124
1,1,1,2-Tetrachloroethane 25.4 0.70 " 28.0 90.8 67-129
Ethylbenzene 15.6 0.44 " 17.7 88.0 70-124
m,p-Xylene 15.8 0.44 " 17.7 89.5 61-134
o-Xylene 14.4 0.44 " 17.7 81.6 67-125
1,1,2,2-Tetrachloroethane 25.6 0.70 " 28.0 91.3 65-127
Surrogate: 1,2-Dichloroethane-d4 48.8 " 42.9 114 76-134 Surrogate: Toluene-d8 43.6 " 41.4 105 78-125
Surrogate: 4-Bromofluorobenzene 64.8 " 72.9 88.9 77-127

Page 13 of 14 ends

Project:

Project Number:

Project Manager:

Reported:

SCS Engineers - Long Beach
3900 Kilroy Airport Way, Suite 100
SCS040318-12
01214273.03/ 840 The City Drive S
Long Beach, CA 90806-6816 Mr. Justin Rauzon 10-Apr-18 16:17 H&P Mobile
Geochemistry Inc.
2470 Impala Drive
Carlsbad, CA 92010
760-804-9678 Phone
760-804-9159 Fax
Notes and Definitions
J- Report This sample is reported to the MDL or LOD determined for this method. All confirmed hits above the listed MDL or LOD value and below the RL/LOQ, will be flagged with a "J" result. If an MDL or LOD is not listed, the analyte is ND at the RL.

J Detected but below the RL/LOQ; therefore, result is an estimated concentration.

B-03 Analyte present in the blank above the reported MDL but below the reporting limit.

Percent Recovery
RPD Relative Percent Difference
%REC
MDL Method Detection Limit
ND Analyte NOT DETECTED at or above the reporting limit LCC Leak Check Compound
Appendix
H&P Mobile Geochemistry, Inc. is approved as an Environmental Testing Laboratory and Mobile Laboratory in accordance with the DoD-ELAP Program and ISO/IEC 17025:2005 programs through PJLA, accreditation number 69070 for EPA Method TO-15, H&P Method TO-15, EPA Method 8260B and H&P 8260SV.

H&P is approved by the State of Arizona as an Environmental Testing Laboratory and Mobile Laboratory, certification numbers AZM758 and AZ0779.

H&P is approved by the State of California as an Environmental Laboratory and Mobile Laboratory in conformance with the Environmental Laboratory Accreditation Program (ELAP) for the category of Volatile and Semi-Volatile Organic Chemistry of Hazardous Waste, certification numbers 2740, 2741, 2743, 2744, 2745, 2754 & 2930.

H&P is approved by the State of Florida Department of Health under the National Environmental Laboratory Accreditation Conference (NELAC) certification number E871100.

The complete list of stationary and mobile laboratory certifications along with the fields of testing (FOTs) and analyte lists are available at www.handpmg.com/about/certifications.

All soil results are reported in wet weight.

Page 14 of 14 ends

Mobile
'Z Geochemistry, Inc.
2470 Impala Drive, Carlsbad, CA 92010
& Field Office - Signal Hill, CA
W handpmg.comE [email protected]
P 760.804.9678 F 760.804.9159
VAPOR I AIR Chain of Custody DATE:3h0izo S
Page _Lof
Lab Client and Project Information
Outside Lab:

Sample Receipt (Lab Use Only)
Lab Client/Consultant: Date Rec'd: 4 131 153. Control #: 1 groag i . 0 I S CS Evi i; etfrer5
Project Name / #: 0 I 2-i 4233,03
H&P Project # SCS•04 03 1 — 12 Lab Client Project Manager: 1.4.4 I ..1/.., e auto..., plitiet Lo4tn:cal._. v,:ve ‘euti.,, 0 r,a lei c ot Lab Work Order #
Eg0401.1-
Lab Client Address: lie° K ; WI Azrforl. 4,4)e., Sie. 100 1 I Report E-Mail(s): 1 .
e t.y. €0 f,5e..,3,..,eers • cc...,
Lab Client City, State, Zip: Le e Sample Intact: Yes • No • See Notes Below , 4 10 130 C,
.3' aki
Phone Number: s - I, i _ 5- sl _ 9.wi Receipt Gauge ID: 7002_0 Temp: i l Reporting Requirements Turnaround Time Sampler Information Receipt Notes/Tracking #:

I 2-1 8 rRolcloG04-11-g 40
12-1STrl,190St°3 I S
_
Lab PM Init als: VP,/
Standard Report ❑ Level III ❑ Level IV K5-7 day Stnd ❑ 24-Hr Rush Sampler(s): J ,,, L
"
• a 1,41-0,1
• Excel EDD ❑Other EDD: ❑ 3-day Rush • Mobile Lab nature: pe ❑ CA Geotracker Global ID: ❑ 48-Hr Rush • Other:

Date:
, , 31301..., c
Additional Instructions to Laboratory: F,,,ik 1;5A- ?er $‘404e. . * Preferred VOC units (please choose one):

CI i.tg/L zi.t g/ rn3 ppbv ppmv h?Ofk- ) --CLCLC/6 vklq 3 l< VOCs Standard Full List
❑
8260SV TO-15
VOCs Short ListI ProjectList
❑
8260SV 0 TO-15
Oxygenates
❑
8260SV 0 TO-15
Naphthalene "r",_ •
❑
8260SV
TPHvasGas
❑
8260SVm0 TO-15m
Aromatic/Aliphatic Fractions
❑
8260SVm0 TO-15m
Leak Check Compound
DEA 0 IPA 0 He
Methane by EPA 8015m Fixed Gases byASTM D1945
CO2 0 02 0N2

SAMPLE NAME

FIELD POINT
NAME
(if applicable)
DATE
mm/dd/yy
TIME
24hr clock

SAMPLE TYPE
Indoor Air (IA), Ambient
Air (AA), Subslab (SS),
Soil Vapor (SV)

CONTAINER

SIZE & TYPE
400mUlLAL Summa,
Tedlar, Tube, etc.

CONTAINER
ID 1( 44)
Lab useonly: •
Receipt Vac
A A -1 03/Wig u0:45 AA ‘ L. 54.,,„,, _3-3G
_ ig- 1 y1
- 3 .32 )c.

A A- 2. 112: 9q A A la' x.04 yt )6
1 A -1 11:08 TA 2.11 -54 A `i'''
to - 2 11:11 'LA 219 -51;4 A Y
L A- 2. (0,41; (-"A-c) II: 12 IA - 3 VI -S93 X --/
Appr /R linqu' ri..., by: Company: Date: Time:
665 4miectii 4114 lif 9:40 AM
Received by: -- ,fy.,1,1apwrtre...m_. Compar ty4t, de:gi 1 ,..c... Time. . ,..- , j 0 r 441
App /Relinquish by: Company: V Date: Time: Received by: Company: ibte: Time:

Approved/Relinquished by: Company: Date: Time: Received by: Company: Dale: Time:
'Approval constitutes as authorization to proceed with analysis and acceptance of conditions on back Appendix 6A1, Rev 5/23/2016, Effective 5/23/2016 2302
Air Sampling into Summa (Indoor, Outdoor, Ambient)
Site Address:

Project Name:

Sample Collector:
`13q0 The C.* 4-1 5...+41 Iocavor CA
FO rw.cf ce4:;I; Cleavier
eatvuel
Date: SI2i1iel
Arrival Time: I not 00
Departure Time: 3/10/2,919 igto0
—
Sample Information Sample Start Sample Check Sample Check Sample End Field Notes
Sample ID Date
\LYY
Summa
ID #
Flow
Controller
ID #
Flow
Rate (hrs
or cc/min)
Start
Time
Initial
Vacuum
(" Hg)
Check
Time
Check
Vacuum
(" Hg)
Check
Time
Check
Vacuum
(" Hg)
End
Time
End
Vacuum
(g) " H
1 14A-1. 3/29 ,33‘ F 119 5.9 14..ys <-3o 14:4S - 5'.o svj Gc.e...re Arc Roo 2 A A -2, jia F 2.22 3.4 tfr:41 <-30 07, '1441.0 R.4 - ..Pea-- 414 ;,.. 3 1A - '1 2.7 9 p isi 3.Y 1-7:01 c -30 n..0 q --7.S 6-Aere:s e roe... (J 4 to - 2 249 Filo If 11:11 <-30 t?: II-6.5 we'r -Cee...ce Or5 TA - I (o4f1;[.)Ve) 317 F ITS s• g 1-7112.<-30 11:12-G 8' 0.416-6....1-e. 6 7
8 9
10 i-f
).1.1c1)
•w e. Llem
Weather Conditions
Weather Summary: 5,010)
%%1 G1o,A1S
Barometric Pressure: 30.oi "143
Ambient Temp Avg: “.

Ambient Temp High/Low:

Indoor Air Temp Avg:

Wind Speed/Direction:

Other:

Potential Outdoor Sources of Pollution
Source
5 kree.i- 444;
Household Products
Ingredient(s)
70T/5‘1°F
(2.S 0.ft./6v1
Location Type
2303
26 November 2018
Enclosed is the analytical report for the above referenced project. The data herein applies to samples as received by H&P Mobile Geochemistry, Inc. on 08-Nov-18 which were analyzed in accordance with the attached Chain of Custody record(s).

The results for all sample analyses and required QA/QC analyses are presented in the following sections and summarized in the documents:
• Sample Summary
• Case Narrative (if applicable)
• Sample Results
• Quality Control Summary
• Notes and Definitions / Appendix
• Chain of Custody
• Sampling Logs (if applicable)
Unless otherwise noted, I certify that all analyses were performed and reviewed in compliance with our Quality Systems Manual and Standard Operating Procedures. This report shall not be reproduced, except in full, without the written approval of H&P Mobile Geochemistry, Inc.

We at H&P Mobile Geochemistry, Inc. sincerely appreciate the opportunity to provide analytical services to you on this project. If you have any questions or concerns regarding this analytical report, please contact me at your convenience at 760-804-9678.

Sincerely,
Client Project: 01214274.03/ The City Dr S
H&P Project: SCS110818-11 Rev
Long Beach, CA 90806-6816
3900 Kilroy Airport Way, Suite 100
SCS Engineers - Long Beach
Mr. Justin Rauzon
Laboratory Director
Janis La Roux
Dear Mr. Justin Rauzon:

Quality. Accuracy. Experience. 2470 Impala Drive, Carlsbad, CA 92010 & Field Office - Signal Hill, CA P 1.800.834.9888 / 760.804.9678 F 760.804.9159 W handpmg.com Mobile
Geochemistry Inc.

H&P Mobile Geochemistry, Inc. is certified under the California ELAP and the National Environmental Laboratory Accreditation Conference (NELAC). H&P is approved as an Environmental Testing Laboratory and Mobile Laboratory in accordance with the DoD-ELAP Program and ISO/IEC 17025:2005 programs, accreditation number 69070 for EPA Method TO-15, H&P Method TO-15, EPA Method 8260B and H&P 8260SV.

Page 1 of 14 ends

2304
Project:

Project Number:

Project Manager:

Reported:

ANALYTICAL REPORT FOR SAMPLES
Date Received
AA1 E811030-01 Vapor 06-Nov-18 08-Nov-18
AA2 E811030-02 Vapor 06-Nov-18 08-Nov-18
IA1 E811030-03 Vapor 06-Nov-18 08-Nov-18
IA2 E811030-04 Vapor 06-Nov-18 08-Nov-18
IA2 Duplicate E811030-05 Vapor 06-Nov-18 08-Nov-18
The values listed in the MDL column for all samples included in this report are a nominal limt of detection (LOD), greater than the method detection limt (MDL) but less than the reporting limit (RL). While MDL sutdies have been performed for the instrument in accordance with H&P's Standard Operating Procedures, the data cannot be evaluated to this level due to the loss of electronic data files.

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Project:

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Reported:

Result Analyte Limit
Reporting
Units
Dilution
MDL Factor Batch Prepared Analyzed Method Notes
AA1 (E811030-01) Vapor Sampled: 06-Nov-18 Received: 08-Nov-18 J-02 Dichlorodifluoromethane (F12) 0.70 0.25 1.0 ug/m3 1 EK80907 12-Nov-18 12-Nov-18 EPA TO-15 J Chloromethane 1.1 0.10 0.21 " " " " " "
Dichlorotetrafluoroethane (F114) ND 0.35 0.71 " " " " " " Vinyl chloride ND 0.13 0.13 " " " " " "
Bromomethane ND 0.20 0.39 " " " " " "
Chloroethane ND 0.13 0.27 " " " " " "
Trichlorofluoromethane (F11) 1.3 0.28 0.56 " " " " " "
1,1-Dichloroethene ND 0.20 0.40 " " " " " "
1,1,2-Trichlorotrifluoroethane (F113) 0.69 0.39 0.77 " " " " " " J Methylene chloride (Dichloromethane) 0.60 0.18 0.35 " " " " " " Carbon disulfide 0.22 0.16 0.32 " " " " " " J
trans-1,2-Dichloroethene ND 0.20 0.40 " " " " " "
1,1-Dichloroethane ND 0.21 0.41 " " " " " "
2-Butanone (MEK) 0.54 0.15 0.60 " " " " " " J
cis-1,2-Dichloroethene ND 0.20 0.40 " " " " " "
Chloroform ND 0.25 0.25 " " " " " "
1,1,1-Trichloroethane ND 0.28 0.55 " " " " " "
1,2-Dichloroethane (EDC) ND 0.21 0.41 " " " " " "
Benzene 0.36 0.16 0.16 " " " " " "
Carbon tetrachloride 0.45 0.32 0.32 " " " " " "
Trichloroethene ND 0.27 0.55 " " " " " "
1,2-Dichloropropane ND 0.23 0.47 " " " " " "
Bromodichloromethane ND 0.34 0.68 " " " " " "
cis-1,3-Dichloropropene ND 0.23 0.46 " " " " " "
4-Methyl-2-pentanone (MIBK) ND 0.21 0.83 " " " " " "
trans-1,3-Dichloropropene ND 0.23 0.46 " " " " " "
Toluene 1.3 0.19 0.76 " " " " " "
1,1,2-Trichloroethane ND 0.28 0.55 " " " " " "
2-Hexanone (MBK) ND 0.21 0.83 " " " " " "
Dibromochloromethane ND 0.43 1.7 " " " " " "
Tetrachloroethene 5.4 0.34 0.69 " " " " " "
1,2-Dibromoethane (EDB) ND 0.39 0.78 " " " " " "
1,1,1,2-Tetrachloroethane ND 0.35 0.70 " " " " " "
Chlorobenzene ND 0.23 0.47 " " " " " "
Ethylbenzene ND 0.22 0.44 " " " " " "
m,p-Xylene 0.44 0.22 0.44 " " " " " "

Page 3 of 14 ends

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Reported:

Result Analyte Limit
Reporting
Units
Dilution
MDL Factor Batch Prepared Analyzed Method Notes
AA1 (E811030-01) Vapor Sampled: 06-Nov-18 Received: 08-Nov-18 J-02 Styrene ND 0.22 0.43 ug/m3 1 EK80907 12-Nov-18 12-Nov-18 EPA TO-15 o-Xylene ND 0.22 0.44 " " " " " "
Bromoform ND 0.52 1.0 " " " " " "
1,1,2,2-Tetrachloroethane ND 0.35 0.70 " " " " " "
4-Ethyltoluene ND 0.25 0.50 " " " " " "
1,3,5-Trimethylbenzene ND 0.25 0.50 " " " " " "
1,2,4-Trimethylbenzene ND 0.25 0.50 " " " " " "
1,3-Dichlorobenzene ND 0.30 0.61 " " " " " "
1,4-Dichlorobenzene ND 0.30 0.61 " " " " " "
1,2-Dichlorobenzene ND 0.30 0.61 " " " " " "
Naphthalene ND 0.27 0.53 " " " " " "
1,2,4-Trichlorobenzene ND 0.38 1.9 " " " " " "
Hexachlorobutadiene ND 0.54 2.7 " " " " " "
Surrogate: 1,2-Dichloroethane-d4 106 % 76-134 " " " "
Surrogate: Toluene-d8 118 % 78-125 " " " "
Surrogate: 4-Bromofluorobenzene 95.6 % 77-127 " " " "
AA2 (E811030-02) Vapor Sampled: 06-Nov-18 Received: 08-Nov-18 J-02 Dichlorodifluoromethane (F12) 0.55 0.25 1.0 ug/m3 1 EK80907 12-Nov-18 12-Nov-18 EPA TO-15 J Chloromethane 1.1 0.10 0.21 " " " " " "
Dichlorotetrafluoroethane (F114) ND 0.35 0.71 " " " " " " Vinyl chloride ND 0.13 0.13 " " " " " "
Bromomethane ND 0.20 0.39 " " " " " "
Chloroethane ND 0.13 0.27 " " " " " "
Trichlorofluoromethane (F11) 1.3 0.28 0.56 " " " " " "
1,1-Dichloroethene ND 0.20 0.40 " " " " " "
1,1,2-Trichlorotrifluoroethane (F113) 0.69 0.39 0.77 " " " " " " J Methylene chloride (Dichloromethane) 0.56 0.18 0.35 " " " " " " Carbon disulfide 0.16 0.16 0.32 " " " " " " J
trans-1,2-Dichloroethene ND 0.20 0.40 " " " " " "
1,1-Dichloroethane ND 0.21 0.41 " " " " " "
2-Butanone (MEK) 0.57 0.15 0.60 " " " " " " J
cis-1,2-Dichloroethene ND 0.20 0.40 " " " " " "
Chloroform ND 0.25 0.25 " " " " " "
1,1,1-Trichloroethane ND 0.28 0.55 " " " " " "
1,2-Dichloroethane (EDC) ND 0.21 0.41 " " " " " "

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Project:

Project Number:

Project Manager:

Reported:

Result Analyte Limit
Reporting
Units
Dilution
MDL Factor Batch Prepared Analyzed Method Notes
AA2 (E811030-02) Vapor Sampled: 06-Nov-18 Received: 08-Nov-18 J-02 Benzene 0.36 0.16 0.16 ug/m3 1 EK80907 12-Nov-18 12-Nov-18 EPA TO-15 Carbon tetrachloride 0.45 0.32 0.32 " " " " " "
Trichloroethene ND 0.27 0.55 " " " " " "
1,2-Dichloropropane ND 0.23 0.47 " " " " " "
Bromodichloromethane ND 0.34 0.68 " " " " " "
cis-1,3-Dichloropropene ND 0.23 0.46 " " " " " "
4-Methyl-2-pentanone (MIBK) ND 0.21 0.83 " " " " " "
trans-1,3-Dichloropropene ND 0.23 0.46 " " " " " "
Toluene 0.92 0.19 0.76 " " " " " "
1,1,2-Trichloroethane ND 0.28 0.55 " " " " " "
2-Hexanone (MBK) ND 0.21 0.83 " " " " " "
Dibromochloromethane ND 0.43 1.7 " " " " " "
Tetrachloroethene ND 0.34 0.69 " " " " " "
1,2-Dibromoethane (EDB) ND 0.39 0.78 " " " " " "
1,1,1,2-Tetrachloroethane ND 0.35 0.70 " " " " " "
Chlorobenzene ND 0.23 0.47 " " " " " "
Ethylbenzene ND 0.22 0.44 " " " " " "
m,p-Xylene 0.40 0.22 0.44 " " " " " " J
Styrene ND 0.22 0.43 " " " " " "
o-Xylene ND 0.22 0.44 " " " " " "
Bromoform ND 0.52 1.0 " " " " " "
1,1,2,2-Tetrachloroethane ND 0.35 0.70 " " " " " "
4-Ethyltoluene ND 0.25 0.50 " " " " " "
1,3,5-Trimethylbenzene ND 0.25 0.50 " " " " " "
1,2,4-Trimethylbenzene ND 0.25 0.50 " " " " " "
1,3-Dichlorobenzene ND 0.30 0.61 " " " " " "
1,4-Dichlorobenzene ND 0.30 0.61 " " " " " "
1,2-Dichlorobenzene ND 0.30 0.61 " " " " " "
Naphthalene ND 0.27 0.53 " " " " " "
1,2,4-Trichlorobenzene ND 0.38 1.9 " " " " " "
Hexachlorobutadiene ND 0.54 2.7 " " " " " "
Surrogate: 1,2-Dichloroethane-d4 105 % 76-134 " " " "
Surrogate: Toluene-d8 109 % 78-125 " " " "
Surrogate: 4-Bromofluorobenzene 94.2 % 77-127 " " " "

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Project Number:

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Reported:

Result Analyte Limit
Reporting
Units
Dilution
MDL Factor Batch Prepared Analyzed Method Notes
IA1 (E811030-03) Vapor Sampled: 06-Nov-18 Received: 08-Nov-18 J-02 Dichlorodifluoromethane (F12) 0.55 0.25 1.0 ug/m3 1 EK80907 12-Nov-18 12-Nov-18 EPA TO-15 J Chloromethane 1.0 0.10 0.21 " " " " " "
Dichlorotetrafluoroethane (F114) ND 0.35 0.71 " " " " " " Vinyl chloride ND 0.13 0.13 " " " " " "
Bromomethane ND 0.20 0.39 " " " " " "
Chloroethane ND 0.13 0.27 " " " " " "
Trichlorofluoromethane (F11) 1.2 0.28 0.56 " " " " " "
1,1-Dichloroethene ND 0.20 0.40 " " " " " "
1,1,2-Trichlorotrifluoroethane (F113) 0.69 0.39 0.77 " " " " " " J Methylene chloride (Dichloromethane) 0.53 0.18 0.35 " " " " " " Carbon disulfide 0.19 0.16 0.32 " " " " " " J
trans-1,2-Dichloroethene ND 0.20 0.40 " " " " " "
1,1-Dichloroethane ND 0.21 0.41 " " " " " "
2-Butanone (MEK) 1.4 0.15 0.60 " " " " " "
cis-1,2-Dichloroethene ND 0.20 0.40 " " " " " "
Chloroform 1.7 0.25 0.25 " " " " " "
1,1,1-Trichloroethane ND 0.28 0.55 " " " " " "
1,2-Dichloroethane (EDC) ND 0.21 0.41 " " " " " "
Benzene 0.49 0.16 0.16 " " " " " "
Carbon tetrachloride 0.45 0.32 0.32 " " " " " "
Trichloroethene ND 0.27 0.55 " " " " " "
1,2-Dichloropropane ND 0.23 0.47 " " " " " "
Bromodichloromethane ND 0.34 0.68 " " " " " "
cis-1,3-Dichloropropene ND 0.23 0.46 " " " " " "
4-Methyl-2-pentanone (MIBK) 0.33 0.21 0.83 " " " " " " J trans-1,3-Dichloropropene ND 0.23 0.46 " " " " " "
Toluene 1.8 0.19 0.76 " " " " " "
1,1,2-Trichloroethane ND 0.28 0.55 " " " " " "
2-Hexanone (MBK) 0.33 0.21 0.83 " " " " " " J
Dibromochloromethane ND 0.43 1.7 " " " " " "
Tetrachloroethene ND 0.34 0.69 " " " " " "
1,2-Dibromoethane (EDB) ND 0.39 0.78 " " " " " "
1,1,1,2-Tetrachloroethane ND 0.35 0.70 " " " " " "
Chlorobenzene ND 0.23 0.47 " " " " " "
Ethylbenzene 0.26 0.22 0.44 " " " " " " J
m,p-Xylene 0.62 0.22 0.44 " " " " " "

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Project:

Project Number:

Project Manager:

Reported:

Result Analyte Limit
Reporting
Units
Dilution
MDL Factor Batch Prepared Analyzed Method Notes
IA1 (E811030-03) Vapor Sampled: 06-Nov-18 Received: 08-Nov-18 J-02 Styrene 0.86 0.22 0.43 ug/m3 1 EK80907 12-Nov-18 12-Nov-18 EPA TO-15 o-Xylene 0.26 0.22 0.44 " " " " " " J
Bromoform ND 0.52 1.0 " " " " " "
1,1,2,2-Tetrachloroethane ND 0.35 0.70 " " " " " "
4-Ethyltoluene ND 0.25 0.50 " " " " " "
1,3,5-Trimethylbenzene ND 0.25 0.50 " " " " " "
1,2,4-Trimethylbenzene 0.40 0.25 0.50 " " " " " " J
1,3-Dichlorobenzene ND 0.30 0.61 " " " " " "
1,4-Dichlorobenzene ND 0.30 0.61 " " " " " "
1,2-Dichlorobenzene ND 0.30 0.61 " " " " " "
Naphthalene 0.32 0.27 0.53 " " " " " " J
1,2,4-Trichlorobenzene ND 0.38 1.9 " " " " " "
Hexachlorobutadiene ND 0.54 2.7 " " " " " "
Surrogate: 1,2-Dichloroethane-d4 103 % 76-134 " " " "
Surrogate: Toluene-d8 111 % 78-125 " " " "
Surrogate: 4-Bromofluorobenzene 91.6 % 77-127 " " " "
IA2 (E811030-04) Vapor Sampled: 06-Nov-18 Received: 08-Nov-18 J-02 Dichlorodifluoromethane (F12) 0.40 0.25 1.0 ug/m3 1 EK80907 12-Nov-18 12-Nov-18 EPA TO-15 J Chloromethane 1.1 0.10 0.21 " " " " " "
Dichlorotetrafluoroethane (F114) ND 0.35 0.71 " " " " " " Vinyl chloride ND 0.13 0.13 " " " " " "
Bromomethane ND 0.20 0.39 " " " " " "
Chloroethane ND 0.13 0.27 " " " " " "
Trichlorofluoromethane (F11) 1.2 0.28 0.56 " " " " " "
1,1-Dichloroethene ND 0.20 0.40 " " " " " "
1,1,2-Trichlorotrifluoroethane (F113) 0.62 0.39 0.77 " " " " " " J Methylene chloride (Dichloromethane) 0.56 0.18 0.35 " " " " " " Carbon disulfide 0.19 0.16 0.32 " " " " " " J
trans-1,2-Dichloroethene ND 0.20 0.40 " " " " " "
1,1-Dichloroethane ND 0.21 0.41 " " " " " "
2-Butanone (MEK) 0.93 0.15 0.60 " " " " " "
cis-1,2-Dichloroethene ND 0.20 0.40 " " " " " "
Chloroform 0.89 0.25 0.25 " " " " " "
1,1,1-Trichloroethane ND 0.28 0.55 " " " " " "
1,2-Dichloroethane (EDC) ND 0.21 0.41 " " " " " "

Page 7 of 14 ends

Project:

Project Number:

Project Manager:

Reported:

Result Analyte Limit
Reporting
Units
Dilution
MDL Factor Batch Prepared Analyzed Method Notes
IA2 (E811030-04) Vapor Sampled: 06-Nov-18 Received: 08-Nov-18 J-02 Benzene 0.42 0.16 0.16 ug/m3 1 EK80907 12-Nov-18 12-Nov-18 EPA TO-15 Carbon tetrachloride 0.45 0.32 0.32 " " " " " "
Trichloroethene ND 0.27 0.55 " " " " " "
1,2-Dichloropropane ND 0.23 0.47 " " " " " "
Bromodichloromethane ND 0.34 0.68 " " " " " "
cis-1,3-Dichloropropene ND 0.23 0.46 " " " " " "
4-Methyl-2-pentanone (MIBK) 0.25 0.21 0.83 " " " " " " J trans-1,3-Dichloropropene ND 0.23 0.46 " " " " " "
Toluene 1.3 0.19 0.76 " " " " " "
1,1,2-Trichloroethane ND 0.28 0.55 " " " " " "
2-Hexanone (MBK) 0.21 0.21 0.83 " " " " " " J
Dibromochloromethane ND 0.43 1.7 " " " " " "
Tetrachloroethene ND 0.34 0.69 " " " " " "
1,2-Dibromoethane (EDB) ND 0.39 0.78 " " " " " "
1,1,1,2-Tetrachloroethane ND 0.35 0.70 " " " " " "
Chlorobenzene ND 0.23 0.47 " " " " " "
Ethylbenzene 0.22 0.22 0.44 " " " " " " J
m,p-Xylene 0.57 0.22 0.44 " " " " " "
Styrene 0.39 0.22 0.43 " " " " " " J
o-Xylene 0.22 0.22 0.44 " " " " " " J
Bromoform ND 0.52 1.0 " " " " " "
1,1,2,2-Tetrachloroethane ND 0.35 0.70 " " " " " "
4-Ethyltoluene ND 0.25 0.50 " " " " " "
1,3,5-Trimethylbenzene ND 0.25 0.50 " " " " " "
1,2,4-Trimethylbenzene 0.30 0.25 0.50 " " " " " " J
1,3-Dichlorobenzene ND 0.30 0.61 " " " " " "
1,4-Dichlorobenzene ND 0.30 0.61 " " " " " "
1,2-Dichlorobenzene ND 0.30 0.61 " " " " " "
Naphthalene 0.90 0.27 0.53 " " " " " "
1,2,4-Trichlorobenzene 0.53 0.38 1.9 " " " " " " J
Hexachlorobutadiene ND 0.54 2.7 " " " " " "
Surrogate: 1,2-Dichloroethane-d4 106 % 76-134 " " " "
Surrogate: Toluene-d8 111 % 78-125 " " " "
Surrogate: 4-Bromofluorobenzene 90.5 % 77-127 " " " "

Page 8 of 14 ends

Project:

Project Number:

Project Manager:

Reported:

Result Analyte Limit
Reporting
Units
Dilution
MDL Factor Batch Prepared Analyzed Method Notes
IA2 Duplicate (E811030-05) Vapor Sampled: 06-Nov-18 Received: 08-Nov-18 J-02 Dichlorodifluoromethane (F12) 0.50 0.25 1.0 ug/m3 1 EK80907 12-Nov-18 12-Nov-18 EPA TO-15 J Chloromethane 1.0 0.10 0.21 " " " " " "
Dichlorotetrafluoroethane (F114) ND 0.35 0.71 " " " " " " Vinyl chloride ND 0.13 0.13 " " " " " "
Bromomethane ND 0.20 0.39 " " " " " "
Chloroethane ND 0.13 0.27 " " " " " "
Trichlorofluoromethane (F11) 1.2 0.28 0.56 " " " " " "
1,1-Dichloroethene ND 0.20 0.40 " " " " " "
1,1,2-Trichlorotrifluoroethane (F113) 0.69 0.39 0.77 " " " " " " J Methylene chloride (Dichloromethane) 0.56 0.18 0.35 " " " " " " Carbon disulfide 0.22 0.16 0.32 " " " " " " J
trans-1,2-Dichloroethene ND 0.20 0.40 " " " " " "
1,1-Dichloroethane ND 0.21 0.41 " " " " " "
2-Butanone (MEK) 0.99 0.15 0.60 " " " " " "
cis-1,2-Dichloroethene ND 0.20 0.40 " " " " " "
Chloroform 0.84 0.25 0.25 " " " " " "
1,1,1-Trichloroethane ND 0.28 0.55 " " " " " "
1,2-Dichloroethane (EDC) ND 0.21 0.41 " " " " " "
Benzene 0.45 0.16 0.16 " " " " " "
Carbon tetrachloride 0.45 0.32 0.32 " " " " " "
Trichloroethene ND 0.27 0.55 " " " " " "
1,2-Dichloropropane ND 0.23 0.47 " " " " " "
Bromodichloromethane ND 0.34 0.68 " " " " " "
cis-1,3-Dichloropropene ND 0.23 0.46 " " " " " "
4-Methyl-2-pentanone (MIBK) 0.21 0.21 0.83 " " " " " " J trans-1,3-Dichloropropene ND 0.23 0.46 " " " " " "
Toluene 1.3 0.19 0.76 " " " " " "
1,1,2-Trichloroethane ND 0.28 0.55 " " " " " "
2-Hexanone (MBK) ND 0.21 0.83 " " " " " "
Dibromochloromethane ND 0.43 1.7 " " " " " "
Tetrachloroethene ND 0.34 0.69 " " " " " "
1,2-Dibromoethane (EDB) ND 0.39 0.78 " " " " " "
1,1,1,2-Tetrachloroethane ND 0.35 0.70 " " " " " "
Chlorobenzene ND 0.23 0.47 " " " " " "
Ethylbenzene 0.22 0.22 0.44 " " " " " " J
m,p-Xylene 0.53 0.22 0.44 " " " " " "

Page 9 of 14 ends

Project:

Project Number:

Project Manager:

Reported:

Result Analyte Limit
Reporting
Units
Dilution
MDL Factor Batch Prepared Analyzed Method Notes
IA2 Duplicate (E811030-05) Vapor Sampled: 06-Nov-18 Received: 08-Nov-18 J-02 Styrene 0.35 0.22 0.43 ug/m3 1 EK80907 12-Nov-18 12-Nov-18 EPA TO-15 J o-Xylene 0.22 0.22 0.44 " " " " " " J
Bromoform ND 0.52 1.0 " " " " " "
1,1,2,2-Tetrachloroethane ND 0.35 0.70 " " " " " "
4-Ethyltoluene ND 0.25 0.50 " " " " " "
1,3,5-Trimethylbenzene ND 0.25 0.50 " " " " " "
1,2,4-Trimethylbenzene 0.25 0.25 0.50 " " " " " " J
1,3-Dichlorobenzene ND 0.30 0.61 " " " " " "
1,4-Dichlorobenzene ND 0.30 0.61 " " " " " "
1,2-Dichlorobenzene ND 0.30 0.61 " " " " " "
Naphthalene ND 0.27 0.53 " " " " " "
1,2,4-Trichlorobenzene ND 0.38 1.9 " " " " " "
Hexachlorobutadiene ND 0.54 2.7 " " " " " "
Surrogate: 1,2-Dichloroethane-d4 105 % 76-134 " " " "
Surrogate: Toluene-d8 109 % 78-125 " " " "
Surrogate: 4-Bromofluorobenzene 89.5 % 77-127 " " " "

Page 10 of 14 ends

Project:

Project Number:

Project Manager:

Reported:

SCS Engineers - Long Beach
3900 Kilroy Airport Way, Suite 100
SCS110818-11 Rev
01214274.03/ The City Dr S
Long Beach, CA 90806-6816 Mr. Justin Rauzon 26-Nov-18 15:44 H&P Mobile
Geochemistry Inc.
2470 Impala Drive
Carlsbad, CA 92010
760-804-9678 Phone
760-804-9159 Fax
Result Limit
Reporting
Units Level
Spike
Result
Source
%REC
%REC
Limits RPD
RPD
Analyte Limit Notes
Volatile Organic Compounds by EPA TO-15 - Quality Control H&P Mobile Geochemistry, Inc.

Batch EK80907 - TO-15
Blank (EK80907-BLK1) Prepared & Analyzed: 12-Nov-18
Dichlorodifluoromethane (F12) ND 1.0 ug/m3
Chloromethane ND 0.21 "
Dichlorotetrafluoroethane (F114) ND 0.71 "
Vinyl chloride ND 0.13 "
Bromomethane ND 0.39 "
Chloroethane ND 0.27 "
Trichlorofluoromethane (F11) ND 0.56 "
1,1-Dichloroethene ND 0.40 "
1,1,2-Trichlorotrifluoroethane (F113) ND 0.77 "
Methylene chloride (Dichloromethane) ND 0.35 "
Carbon disulfide ND 0.32 "
trans-1,2-Dichloroethene ND 0.40 "
1,1-Dichloroethane ND 0.41 "
2-Butanone (MEK) ND 0.60 "
cis-1,2-Dichloroethene ND 0.40 "
Chloroform ND 0.25 "
1,1,1-Trichloroethane ND 0.55 "
1,2-Dichloroethane (EDC) ND 0.41 "
Benzene ND 0.16 "
Carbon tetrachloride ND 0.32 "
Trichloroethene ND 0.55 "
1,2-Dichloropropane ND 0.47 "
Bromodichloromethane ND 0.68 "
cis-1,3-Dichloropropene ND 0.46 "
4-Methyl-2-pentanone (MIBK) ND 0.83 "
trans-1,3-Dichloropropene ND 0.46 "
Toluene ND 0.76 "
1,1,2-Trichloroethane ND 0.55 "
2-Hexanone (MBK) ND 0.83 "
Dibromochloromethane ND 1.7 "
Tetrachloroethene ND 0.69 "
1,2-Dibromoethane (EDB) ND 0.78 "
1,1,1,2-Tetrachloroethane ND 0.70 "
Chlorobenzene ND 0.47 "

Page 11 of 14 ends

Project:

Project Number:

Project Manager:

Reported:

Batch EK80907 - TO-15
Blank (EK80907-BLK1) Prepared & Analyzed: 12-Nov-18
Ethylbenzene ND 0.44 ug/m3
m,p-Xylene ND 0.44 "
Styrene ND 0.43 "
o-Xylene ND 0.44 "
Bromoform ND 1.0 "
1,1,2,2-Tetrachloroethane ND 0.70 "
4-Ethyltoluene ND 0.50 "
1,3,5-Trimethylbenzene ND 0.50 "
1,2,4-Trimethylbenzene ND 0.50 "
1,3-Dichlorobenzene ND 0.61 "
1,4-Dichlorobenzene ND 0.61 "
1,2-Dichlorobenzene ND 0.61 "
Naphthalene ND 0.53 "
1,2,4-Trichlorobenzene ND 1.9 "
Hexachlorobutadiene ND 2.7 "
Surrogate: 1,2-Dichloroethane-d4 229 " 214 107 76-134
Surrogate: Toluene-d8 225 " 207 108 78-125
Surrogate: 4-Bromofluorobenzene 299 " 364 82.1 77-127
LCS (EK80907-BS1) Prepared & Analyzed: 12-Nov-18
Dichlorodifluoromethane (F12) 95.9 1.0 ug/m3 101 95.1 59-128 Vinyl chloride 46.5 0.13 " 52.0 89.5 64-127
Chloroethane 51.0 0.27 " 53.6 95.2 63-127
Trichlorofluoromethane (F11) 99.4 0.56 " 113 87.8 62-126 1,1-Dichloroethene 66.8 0.40 " 80.8 82.7 61-133
1,1,2-Trichlorotrifluoroethane (F113) 141 0.77 " 155 91.1 66-126 Methylene chloride (Dichloromethane) 60.9 0.35 " 70.8 86.0 62-115 trans-1,2-Dichloroethene 68.4 0.40 " 80.8 84.7 67-124
1,1-Dichloroethane 71.9 0.41 " 82.4 87.2 68-126
cis-1,2-Dichloroethene 72.6 0.40 " 80.0 90.7 70-121
Chloroform 91.6 0.25 " 99.2 92.3 68-123
1,1,1-Trichloroethane 100 0.55 " 111 90.1 68-125
1,2-Dichloroethane (EDC) 81.4 0.41 " 82.4 98.8 65-128

Page 12 of 14 ends

Project:

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Reported:

Batch EK80907 - TO-15
LCS (EK80907-BS1) Prepared & Analyzed: 12-Nov-18
Benzene 64.1 0.16 ug/m3 64.8 98.9 69-119
Carbon tetrachloride 124 0.32 " 128 97.1 68-132
Trichloroethene 108 0.55 " 110 98.1 71-123
Toluene 74.0 0.76 " 76.8 96.3 66-119
1,1,2-Trichloroethane 108 0.55 " 111 97.0 73-119
Tetrachloroethene 131 0.69 " 138 94.9 66-124
1,1,1,2-Tetrachloroethane 133 0.70 " 140 95.3 67-129
Ethylbenzene 95.9 0.44 " 88.4 109 70-124
m,p-Xylene 85.9 0.44 " 88.4 97.2 61-134
o-Xylene 87.6 0.44 " 88.4 99.1 67-125
1,1,2,2-Tetrachloroethane 121 0.70 " 140 86.8 65-127
Surrogate: 1,2-Dichloroethane-d4 237 " 214 111 76-134
Surrogate: Toluene-d8 219 " 207 106 78-125
Surrogate: 4-Bromofluorobenzene 334 " 364 91.5 77-127

Page 13 of 14 ends

Project:

Project Number:

Project Manager:

Reported:

SCS Engineers - Long Beach
3900 Kilroy Airport Way, Suite 100
SCS110818-11 Rev
01214274.03/ The City Dr S
Long Beach, CA 90806-6816 Mr. Justin Rauzon 26-Nov-18 15:44 H&P Mobile
Geochemistry Inc.
2470 Impala Drive
Carlsbad, CA 92010
760-804-9678 Phone
760-804-9159 Fax
Notes and Definitions
J-02 The MDL listed for this analyte is a nominal limit of detection, greater than the MDL but less than the RL. All confirmed hits above this listed MDL value and below the RL, will be flagged with a "J" result.

J Detected but below the RL/LOQ; therefore, result is an estimated concentration.

H&P is approved by the State of Arizona as an Environmental Testing Laboratory, certification number AZ0779.

H&P is approved by the State of Louisiana Department of Environmental Quality under the National Environmental Laboratory Accreditation Conference (NELAC) certification number 04138.

The complete list of stationary and mobile laboratory certifications along with the fields of testing (FOTs) and analyte lists are available at www.handpmg.com/about/certifications.

All soil results are reported in wet weight.

Page 14 of 14 ends

:p Mobile
7 Geochemistry, Inc.
2470 Impala Drive, Carlsbad, CA 92010
& Field Office - Signal Hill, CA
W handpmg.com E [email protected]
P 760.804.9678 F 760.804.9159
VAPOR I AIR Chain of Custody DATE: 0'4 24:1 -
Page
Lab Client and Project Information Sample Receipt (Lab Use Only) Lab Client/Consultant: .
c evvi ,,AeerS Project Name / #: pv7.142.7,4.0 Date Recd:igi 1 t i, Control #: ic< -- Lig D! Lab Client Project Manager:..,,, n
-.1 . K.3,,,,,z.,-.,
Project Location:
qi-v The CA -1 pr:ve. ;.,,,4-1- H&P Project # SOS I I
. pg i I J
Lab Client Address: 1100 i(i Ir../ Pt;_t Lrt-- Lo-y 4i-c • ILA' Report E-Mail(s):
- ,_ J. a,,,,2v .-1 el-,... s e.,...,:.),.. v.e...e.-s . ,. •frl Lab Work Order # F 5, 110,0
Lab Client City, State, Zip: I i .
(-OA a G :aa--1.1 LA go '&06 Sample Intact: A Yes • No • See Notes Below Phone Number: 5L, 2, -Li 2 -1 5-i '-i ' Receipt Gauge ID: ritjp,q 0 Temp:ki Reporting Requirements Turnaround Time Sampler Information Outside Lab:

X Standard Report ❑ Level Ill ❑ Level IV
❑ Excel EDD ❑ Other EDD:
) 5-7 day Stnd
❑ 3-day Rush
❑ 48-Hr Rush
❑ 24-Hr Rush
❑ Mobile Lab
❑ Other:

Sampler(s):
4 ..., ....,
• 447.4-0 el
Receipt
(
Notes/Tracking
q&TV01.6?
#:
01-1C(5(DODZI,
eli 4 2.2
Lab PM Ini als: tte)
Signature: p .

Date:
(yak_
❑ CA Geotracker Global ID:

I 2,-G3-Fr44iq
I- b.-2c.i 3
Additional Instructions to Laboratory:
* referred VOC units (please choose one):
pig/L Mkg/m3 ❑ ppbv ❑ ppmv
VOCs Standard Full List
❑
8260SV igj TO-15
VOCs Short List I Project List
E 8260SV 0 TO-15
Oxygenates
❑
8260SV E TO-15
Naphthalene
❑
8260SV 'gj TO-15
TPHvas Gas
E
8260SVm0 TO-15m I
Aromatic/Aliphatic Fractions
❑
8260SVm0 TO- 15m
Leak Check Compound
DFA ❑ IPA E He
Methane by EPA 8015m Fixed Gases byASTM D1945
CO2 El 02 E] N2

SAMPLE NAME

FIELD POINT
NAME
(if applicable)
DATE
mm/dd/yy
TIME
24hr clock

SAMPLE TYPE
Indoor Air (IA), Ambient
Air (AA), Subslab (SS),
soil Vapor (SV)

CONTAINER

SIZE & TYPE
400mLilLJ6L Summa,
Tedlar, Tu14_etc.
sisklii r

CONTAINER
ID 44) (
Lab use only:

ReceiptVac
AA 1 11/0/i3 it,:r, AA (P A L 5.i.,,,,; 1-1 S'Ci -7Y7 X X A A -2- (7:01 A 4 I' -6)..?9 )(
T-A 1- 11,ol IA 41; --4.g ')( 'A.
_ : • 17:04 A 4-33 4 • )(
1:-. A 2 - Dae 663 ve ._ i7 c s i A t-IT i 11, )k A
Appr ved/Reli ui>d by: Company: Date: Time:
ie,5 i I/ 7/4 I c,; PO
Recei ed ,
01 1 .'°A-- -1-jr 1 1 iq la- at)
pp ved/Relinquis d by: Company: gate: Time: -- Rec- ,ed .y: MP Company: Date: Time:

Approved/Relinquished by: Company: Dale: Time: Received by Company: Date: Time:
*Approval constitutes as authorization to proceed with analysis and acceptance of conditions on back Appendix 6A1, Rev 5/23/2016, Effective 5/23/2016 2318 Air Sampling into Summa (Indoor, Outdoor, Ambient)
Site Address:

Project Name:

Sample Collector:
43"-lo Yom. Lii1 Dc..ba eA
leLiNst 5
1147 az,e,c2.6et
Date:itil; -
Arrival Time:

Departure Time:

Sample Information Sample Start Sample Check Sample Check Sample End Field Notes
Sample ID Date
Summa
ID #
Flow
Controller
ID #
Flow
Rate (hrs
or cc/min)
Start
Time
Initial
Vacuum
(" Hg)
Check
Time
Check
Vacuum
(" Hg)
Check
Time
Check
Vacuum
(" Hg)
End
Time
End
Vacuum
(" Hg)
1 AA- 1 i V51 it '-- b env 19 hr 1:"(ii-,,, -30 f itICI,.. -4" ,,.../ ,:..,-.,,,- g,,,c 2 AA - 2 49.? F(55 ,3':O2t,.._ ;,',/ C:ot py - 9" C.,,:.c wv.am- Atc 1,(.0- 3 lA - I 9.35 c VW 51-1, v
4 TA _ / Lii3 it'i 5 e(:)f.,4 - '3.'
II

5.0 1,10. ." g
1 „,
r'eqPr. R..,1,- pi. 4".);4,,
5 "1” A - 2. 62.4/A.",...)kc) 9/I P1.02 c:07p.
. if
-1)-.) S': 0 8 r•4
If
- 9
1 r
6 7
8 9
10 Weather Conditions
Weather Summary:4W „v4 U1 3,f
Potential Outdoor
Source
Sources of Pollution Household
Location Type
Products
Ingredient(s)
Barometric Pressure: s 141
Ambient Temp Avg: 1/4,
[L `
Ambient Temp High/Low: lipEicg17
Indoor Air Temp Avg:

Wind Speed/Direction: 3 ,..01 5
Other:
2319

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2320
F-4: Indoor Air Quality Investigation Report
2321

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2322
Indoor Air Quality Assessment – 840 The City Drive South

INDOOR AIR QUALITY ASSESSMENT
FORMER CECILIA’S CLEANERS SITE
840 THE CITY DRIVE SOUTH
ORANGE, CALIFORNIA 92868
(SITE CODE: #401801)
Prepared for:

GPI-OCS, LLC
c/o Mr. John J. Allen
Allen Matkins Leck Gamble Mallory & Natsis LLP
865 South Figueroa Street, Suite 2800
Los Angeles, California 90017-2543
(213) 955-5548
Prepared by:

SCS ENGINEERS
3900 Kilroy Airport Way, Suite 100
Long Beach, California 90806
(562) 426-9544
January 16, 2019
(Revised February 2019)
File No. 01214274.03
2323
Indoor Air Quality Assessment – 840 The City Drive South i i
This Indoor Air Quality Assessment dated January 16, 2019 (revised February 2019) for the former Cecilia’s Cleaners site located at 840 The City Drive South, Orange, California, was prepared and reviewed by the following:

Justin Rauzon, REPA
Project Manager

SCS ENGINEERS
Kevin W. Green, PG
Project Director

SCS ENGINEERS
John Henkelman
Project Toxicologist

SCS ENGINEERS
2324
Indoor Air Quality Assessment – 840 The City Drive South i
Table of Contents
Section Page
DISCLAIMER........................................................................................................................................................ ii 1 INTRODUCTION .....................................................................................................................................1 2 BACKGROUND, BUILDING DESCRIPTION, AND STATUS ..............................................................1 3 INDOOR AIR QUALITY ASSESSMENT ................................................................................................3 IAQ ANALYTICAL RESULTS AND REGULATORY LIMITS............................................................4 IAQ Analytical Results ................................................................................................................4 Regulatory Limits .........................................................................................................................5 4 Health Risk Assessment ..........................................................................................................................6 Uncertainty Analysis ........................................................................................................................9 5 SOIL AND GROUNDWATER DISCUSSION.................................................................................... 10 6 CONCLUSIONS AND RECOMMENDATIONS ................................................................................ 12 7 REFERENCES ......................................................................................................................................... 13 List of Figures, Tables & Appendices
Figures
1 Site Location Map
2 Site Map Showing Sample Locations
3 Soil Vapor, Subslab and Air Sampling Locations Showing Tetrachloroethene Concentrations and Cross Section A-A’
4 Cross Section A-A’ Showing Contours of Tetrachloroethene in Soil Vapor Tables
1 Summary of Analytical Results for Indoor Air Survey
2 Summary of Lithology Information and Attenuation Factor Calculations for Tetrachloroethene (PCE)
Appendices
A Site Photographs
B Air Sampling Summary Log
C H&P Laboratory Report – Indoor Air
2325
Indoor Air Quality Assessment – 840 The City Drive South i i

DISCLAIMER
This report has been prepared specifically for GPI-OCS, LLC, with specific application to an indoor air quality investigation at the former Cecilia’s Cleaners site located at 840 The City Drive South, Orange, California. The report has been prepared in accordance with the care and skill generally exercised by reputable professionals, under similar circumstances, in this or similar localities. No other warranty, express or implied, is made as to the professional opinions presented herein. No other party, known or unknown to SCS, is intended as a beneficiary of this work product, its content or information embedded therein. Third parties use this report at their own risk.

Changes in site conditions may occur due to variation in rainfall, temperature, water usage, or other factors. Additional information that was not available to the consultant at the time of this investigation or changes that may occur on the site or in the surrounding area may result in modification to the site that would impact the summary and recommendations presented herein.

This report is not a legal opinion.
2326
Indoor Air Quality Assessment – 840 The City Drive South 1 1 INTRODUCTION
SCS Engineers (SCS) was retained by GPI-OCS, LLC to conduct indoor air quality (IAQ) assessments at the former Cecilia’s Cleaners located at 840 The City Drive South, Orange, California (the “Property”). These assessments were conducted as part of the voluntary cleanup agreement (VCA) between the GCI-OCS, LLC and the California Department of Toxic Substances Control (DTSC) executed on November 29, 2017 (Site Code: 401801). The purpose of this sampling was to assess the potential for vapor intrusion of the dry cleaning solvent tetrachloroethene (PCE) or its degradation products into the building from soil vapor. A map showing the location of the Property is provided in Figure 1.

The IAQ assessments were conducted in accordance with SCS’s Indoor Air Quality Workplan (the “Workplan”) dated March 12, 2018, approved by DTSC in its letter dated March 21, 2018 and in an email dated October 11, 2018. The results of an initial IAQ assessment were presented in a report dated June 18, 2018. DTSC comments to the initial IAQ Assessment Report were provided in a Memo dated September 18, 2018. Among the comments was DTSC’s recommendation to conduct a second round of IAQ assessment during the winter season.

This report provides the results of the second round of IAQ assessment, incorporates comments and suggested changes as outlined in DTSC’s September 18, 2018 Memo, and updates and replaces the previous IAQ Assessment report by SCS.
2 BACKGROUND, BUILDING DESCRIPTION, AND
STATUS
The structure on the Property consists of a one-story slab-on-grade building occupied by a fitness center for use by employees working in the surrounding office business park, smoothie café, nail salon, restaurant, and coffee shop (Figure 2). The tenant space currently occupied by the fitness center was occupied by Cecilia’s Cleaners from at least 1991 through 2000. The facility used PCE from at least 1991 through 1999. After 2000, PCE use ceased and this cleaners was reportedly a drop-off and wet laundry facility only.

A 1999 soils investigation by Dames and Moore of the Property detected 15 micrograms per kilogram (µg/kg) of PCE in one of 13 soil samples collected from the area of the dry cleaning machine (URS, May 24, 2007). This sample was from 0.5 feet below ground surface (bgs) and adjacent to the dry cleaning machine. None of the deeper or surrounding samples contained detectable soil concentrations of PCE. Based on this information, further investigation was not recommended.

In July 2014, URS Corporation (URS) conducted a soil vapor survey that included the former dry cleaner space. Based on evolving regulatory concerns since the 1999 investigation, URS noted that the former dry cleaning operation may represent a potential vapor intrusion concern.

A total of eight soil vapor samples were collected from 3 feet bgs in the fitness center space.

PCE was detected in all eight vapor samples at concentrations ranging from 0.77 to 2.66 micrograms per liter (µg/L), as further discussed below. The URS investigation did not fully characterize the lateral extent of the PCE contamination in soil vapor.

2327
Indoor Air Quality Assessment – 840 The City Drive South 2 In March 2015, SCS conducted additional subsurface soil vapor investigation at the Property, consisting of co-located subslab and 5-foot bgs vapor samples at seven locations. The objective of this additional investigation was to further characterize the extent of any volatile organic compound (VOC) releases from the former dry cleaning facility and evaluate the vapor intrusion risk at the Property. Based on the results of this and previous investigations, SCS concluded the following:
• PCE is the only VOC of concern at the Property.
• The nature and extent of PCE in the vapor phase has been defined with:
o PCE was detected at a depth of 5 feet bgs at concentrations ranging from 0.16 to

0.98 µg/L. Using an attenuation factor of 0.001, the PCE concentrations at five feet bgs were below the commercial/industrial DTSC-screening level (SL) of 2 µg/L at all locations, except samples SV-5 and SV-10 collected by URS in 2014.

Using an attenuation factor of 0.03, the PCE concentrations at 5 feet bgs were all above the commercial/industrial DTSC-SL of 0.067 µg/L, with the possible exception of two “non-detect” samples with a detection limit of 0.10 µg/L. o PCE was also detected in sub-slab soil vapor samples at concentrations ranging from 0.04 to 0.26 µg/L. Using a slab attenuation factor of 0.05, sub-slab PCE concentrations were at or above the commercial/industrial DTSC-SL of 0.04 µg/L in 5 of 7 samples. Using a slab attenuation factor of 0.03, sub-slab PCE concentrations were above the commercial/industrial DTSC-SL of 0.067 µg/L in only 2 of 7 samples (SCS4 and SCS6).
• PCE concentrations had significantly decreased within the nine month period since the prior URS soil gas survey – from a high of 2.66 µg/L in July 2014 to a high of 0.98 µg/L during the March 2015 investigation – and, given the fact that the PCE source (the dry cleaning business) is no longer present at the Property, PCE concentrations and any associated risk should continue to decrease with time.
• Based on data from the 5-foot samples, PCE does not pose a significant risk at the Property. Assuming a commercial land use exposure scenario, a vapor sample depth of 3 feet bgs, the actual ceiling height of 9’ 10” at the current tenant space, and loamy sandy soils, the results of the vapor intrusion screening model showed a calculated incremental carcinogenic risk for PCE of 6.7 x 10-7 (equal to 0.67 in one million) and the Hazard quotient (non-carcinogenic risk) of 9.1 x 10-3 (equal to 0.0091). These values are below the generally-accepted regulatory risk levels of 1 x 10-6 and 1, respectively.

Based on the sub-slab data, the incremental carcinogenic risk from PCE at its highest detected concentration during the 2015 sampling at the Property is 6.25 x 10-6 , which
exceeds DTSC’s commonly used “point of departure” for human health risk of 1.0 x 10-6 (equal to one in one million). The maximum Hazard Quotient (non-carcinogenic risk) is

0.085. Given that the area with sub-slab PCE vapor concentrations in excess of the DTSC human health risk level is almost entirely within the fitness center, which is only sporadically occupied by individuals for short periods of time (no employees regularly work in the space), the calculated incremental carcinogenic risk is very conservative. 2328
Indoor Air Quality Assessment – 840 The City Drive South 3 Following its review, DTSC requested that an IAQ Assessment be conducted to further assess the potential for vapor intrusion, as discussed below.
3 INDOOR AIR QUALITY ASSESSMENT
An inspection of the fitness center was conducted by Omo Patrick of DTSC, Jason Purvis of Granite Properties, and Justin Rauzon and Kevin Green of SCS on January 30, 2018. Mr. Patrick requested the first IAQ assessment during the site meeting. As previously discussed, SCS subsequently prepared and submitted the Workplan that was approved by DTSC. SCS conducted the first IAQ assessment on March 29 to 30, 2018. Following review of the initial IAQ report, a second round of IAQ assessment was requested and conducted on November 5 to 6, 2018.

Both IAQ assessments were conducted in accordance with the Workplan and the DTSC Guidance for the Evaluation and Mitigation of Subsurface Vapor Intrusion to Indoor Air (October 2011). Prior to beginning each assessment, SCS conducted a review of janitorial chemical products used and stored in the fitness center facility; no known or suspected sources of PCE were identified. Site conditions during each sampling event were as follows:
• March 2018: At the time the canisters were placed for sampling on the afternoon of March 29, 2018, the weather was sunny with passing clouds and an ambient air temperature of 66 degrees Fahrenheit. There was a reported wind speed of 6.8 miles per hour from the southwest. Indoor air temperature was controlled at approximately 71 degrees Fahrenheit.
• November 2018: At the time the canisters were placed for sampling on the afternoon of November 5, 2018, the weather was sunny and clear with an ambient air temperature of 66 degrees Fahrenheit (ambient high of 71 degrees and low of 58 degrees). There was a reported wind speed of 3 miles per hour from the south. Indoor air temperature was controlled at approximately 71 degrees Fahrenheit.

Both assessments followed the same procedures and protocols. Each sampling event consisted of collecting two indoor air samples and two outdoor “ambient” air samples for background purposes. A Google Earth aerial image showing the sampling locations is provided as Figure 2.

Each sample location was photo documented as provided in Appendix A.

The indoor air samples were collected from representative locations within the building as agreed upon by SCS and DTSC staff. One indoor location (IA-1) was located inside a fitness classroom bounded by glass walls in the northern portion of the fitness center. The second indoor location (IA-2) was located near the location of the former dry cleaning equipment, in the southern portion of the fitness center. A duplicate air sample was also collected at location IA-2 for laboratory quality assurance/quality control purposes. Indoor air samples were collected within the breathing zone (approximately 3 to 5 feet above the floor level).

The outdoor ambient air samples were collected from the roof towards the upwind side of the building based on a prevailing wind direction from the west-northwest. Sample AA-1 was located near the HVAC intake situated above the southern portion of the fitness center tenant space. Sample AA-2 was collected from the upwind, southwestern corner of the building. 2329
Indoor Air Quality Assessment – 840 The City Drive South 4 The indoor and ambient air samples were collected over an approximately 24-hour period in individually-certified clean six liter SUMMA-brand passivated stainless steel canisters. Each SUMMA canister was equipped with a critical orifice (flow controller), prepared by the laboratory, for a 24-hour sample collection period. The critical orifice provided a constant flow rate into the SUMMA canister over the sample duration. Sampling parameters were recorded for each SUMMA canister on an Air Sample Summary Log (Appendix B), including:
• Sample Number
• Sample Location
• SUMMA Canister Serial Number
• Critical Orifice Serial Number
• Pressure
• Start Time
• End Time
Once sampling was completed, the critical orifice was closed and the canisters were labeled and packaged into cardboard boxes for transport to H&P Mobile Geochemistry, Inc. (H&P) of Carlsbad, California, a state-certified laboratory. Samples were tracked from the point of collection through the laboratory using proper chain-of-custody protocol. All samples were analyzed for VOCs at H&P’s fixed laboratory using EPA Method TO-15.

IAQ ANALYTICAL RESULTS AND REGULATORY LIMITS
IAQ Analytical Results
The H&P laboratory report, chain-of-custody documentation, and quality assurance/control (QA/QC) data are provided in Appendix C. Analytical results of IAQ vapor samples from both the March and November 2018 events are summarized in Table 1.

As shown, 29 VOC species were detected in air samples, including PCE, Freon 11, Freon 12, Freon 113, Freon 114, chloromethane, bromomethane, methylene chloride, carbon disulfide, 2- butanone, chloroform, 1,2-dichloroethane, benzene, carbon tetrachloride, 4-methyl-2-pentanone (MIBK), toluene, 2-hexanone, dibromochloromethane, ethylbenzene, m,p-xylene, o-xylene, styrene, 4-ethyltoluene, 1,3,5-trimethylbenzene, 1,2,4-trimethylbenzene, 1,4-dichlorobenzene, naphthalene, 1,2,4-trichlorobenzene, and/or hexachlorobutadiene. Note that PCE concentrations in Table 1 are reported as less than the Laboratory Reporting Limit, and this concentration is greater that the residential DTSC-recommended indoor air screening level of 0.46 ug/m3 . Some
of the VOC results were detected at concentrations above the laboratory method detection limit, but below the laboratory’s practical reporting limit. These concentrations are flagged in the laboratory report with a “J” and are described herein as “estimated concentrations.” Due to a laboratory computer processing issue, the method detection limits are slightly higher for the November 2018 data relative to the March 2018 data, but in both sets of data, the method detection limit for PCE was below both the relevant residential and commercial/industrial screening levels.

For VOC results at or above the laboratory reporting limit in both the primary and duplicate IA-2 samples, the relative percent difference (RPD) was less than 10 percent. The laboratory results for the primary and duplicate samples demonstrated acceptable quality assurance. 2330
Indoor Air Quality Assessment – 840 The City Drive South 5 The VOCs detected in the indoor air samples were also detected in ambient air samples at similar concentrations for most VOC species, with the following exceptions:
• During the second monitoring event, chloroform was not detected (<0.25 micrograms per cubic meter [µg/m3]) in ambient air, but was detected in indoor air at concentrations between 0.87 and 1.7 µg/m3
. Chloroform has not been detected in subsurface samples.

However, chloroform is a common constituent in indoor air and predominantly derived from chlorinated tap water, showering and cleaning solutions, which is likely the case for this site.
• During the second monitoring event, the detection limits for MIBK, 2-hexanone, ethylbenzene, styrene, o-xylene, 1,2,4-trimethylbenzene, naphthalene, and 1,2,4- trichlorobenzene in ambient air were greater than the estimated concentrations (“J”- flagged) concentrations in indoor air.
• Styrene concentrations in sample IA-1 were elevated with respect to other samples during both monitoring events.
• The IA-2 sample during the second monitoring event contained a higher naphthalene concentration (0.90 µg/m3
) than other samples, including the duplicate sample. Further, naphthalene was detected in the method blank during the first monitoring event. This information indicates that the IA-2 result of 0.90 µg/m3 naphthalene may not be representative of actual conditions at the Property. A possible source for the higher naphthalene concentrations may be due to “carry-over” in the SUMMA canister from a previous sampling event.

PCE, the primary COPC detected in the subsurface soil vapor at the Property, was detected in all samples (indoor and ambient) during the first monitoring event at “J”-flagged levels between

0.07J and 0.28J µg/m3.

During the second monitoring event, PCE not detected in the three IA samples at concentrations above the method detection limit or practical quantification limit. However, PCE was detected in one ambient air sample, AA-1, at a concentration of 5.4 µg/m3. The source for PCE detected in the ambient air sample during the second monitoring event is unknown. Although no obvious sources such as dry cleaners, machine shops, or other metal manufacturing operations were identified within a 0.5 mile radius of the Property, there are scattered industrial businesses in the area that may, at least on occasion, use chlorinated solvents such as PCE.

Note that trichloroethene (TCE) and other PCE breakdown products were not detected in indoor air samples or ambient air samples during either monitoring event.

Regulatory Limits
The DTSC Human and Ecological Risk Office (HERO) has issued the Human Health Risk Assessment Note Number 3 (Note No. 3), most recently revised in June 2018. Note No. 3 makes recommendations regarding the methodology and use of the EPA Regional Screening Levels (RSLs; most recently updated in November 2018), as well as, levels modified by HERO for use in setting risk-based detection limits for contaminants of potential concern (COPCs) and evaluating whether a site may warrant no further action or investigation. 2331
Indoor Air Quality Assessment – 840 The City Drive South 6 RSLs have been developed for the evaluation of exposure to approximately 800 elements.

HERO has developed DTSC-modified screening levels (DTSC-SLs) to be used in conjunction with the RSLs to evaluate chemical concentrations in environmental media at California sites and facilities. Both the DTSC-SLs and US EPA RSLs are derived at a target risk level of 1x10-6 and a hazard quotient value of 1. DTSC-SLs are derived for 174 unique elements, compounds, and mixtures listed in the RSL tables. Since DTSC-SLs are more stringent, where one exists for screening COPC concentrations in ambient air, it is used as the screening level in this assessment. Where a DTSC-SL has not been developed for a particular VOC, the RSL screening levels for air are used. Whether DTSC-SL or RSL, the screening levels in this report are referred to as “DTSC-Recommended SLs.” DTSC-Recommended SLs have been developed for both residential and industrial/commercial land use scenarios.

The results are compared to the DTSC-Recommended SLs on Table 1. As shown on the table, PCE was not detected in IA samples at concentrations exceeding either its residential or commercial/industrial DTSC-Recommended SL. Of the 21 analytes detected during the monitoring event, five (benzene, chloroform, carbon tetrachloride, naphthalene, 1,2,4- trichlorobenzene) were detected at concentrations exceeding either their residential and/or commercial/industrial DTSC-Recommended SLs in the IA samples. Benzene and carbon tetrachloride were also detected in AA samples at concentrations exceeding the DTSCRecommended SLs, indicating that the Property is not the source of these VOCs in indoor air.

Chloroform, naphthalene, and 1,2,4-trichlorobenzene were detected at concentrations above their DTSC-Recommended SLs during the March 2018 monitoring event. These compounds were not detected in subsurface soils during previous soil vapor investigations, nor would these compounds be associated with the former dry cleaners.
4 HEALTH RISK ASSESSMENT
PCE is the primary VOC of concern at the Property, and the only VOC detected in subsurface soils at the Property. All other VOCs are either 1) present in ambient air at levels similar to indoor air, or 2) unrelated to the past PCE release and not constituents of concern in subsurface soils. Therefore, this health risk assessment appropriately evaluates PCE only. Health risk assessments were conducted for the commercial worker, gym goer/exerciser, and residential scenarios, as follows.

Commercial: To assess health risks from PCE concentrations in the indoor air samples, the risk from PCE was calculated using the maximum detected concentration of PCE from the March 2018 and November 2018 sampling events. Carcinogenic risk was calculated with Equation 1.

Equation 1: 𝑅𝑅𝑅𝑅𝑅𝑅𝑅𝑅 = 𝑈𝑈𝑈𝑈𝑈𝑈×𝐸𝐸𝐸𝐸×𝐸𝐸 ×𝐸𝐸𝐸𝐸×𝐸𝐸𝐸𝐸𝐸𝐸
(24×365×𝐴𝐴 )
Where:

Risk is the cancer risk,
URF is the Unit Risk Factor,
ET is the exposure time,
EF is the exposure frequency,
ED is the exposure duration,
EPC is the exposure point concentration, and;
2332
Indoor Air Quality Assessment – 840 The City Drive South 7 AT is the averaging time.

For the highest detected concentration and a commercial worker, Equation 1 becomes:

Equation 1 (worker): 1.39 × 10−7 = 0.0000061 �µ𝑔𝑔
𝑚𝑚3�
−1
×8
ℎ𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑜
𝑑𝑑𝑑𝑑𝑑𝑑 ×250𝑑𝑑𝑑𝑑𝑑𝑑𝑦𝑦 ×25 𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦×0.28 µ𝑔𝑔
𝑚𝑚3
(
24 ℎ𝑜𝑜𝑜𝑜𝑜𝑜
𝑑𝑑𝑑𝑑𝑑𝑑 ×365 𝑑𝑑𝑑𝑑𝑑𝑑𝑦𝑦 ×70 𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦)
The chronic hazard quotient are calculated with Equation 2.

Equation 2: 𝐻𝐻𝐻𝐻 = 𝐸𝐸𝐸𝐸×𝐸𝐸 ×𝐸𝐸𝐸𝐸×𝐸𝐸𝐸𝐸𝐸𝐸
( 𝑅𝑅 ×24×365×𝐴𝐴 ×1000)
Where:

HQ is the hazard quotient,
ET is the exposure time,
EF is the exposure frequency,
ED is the exposure duration,
EPC is the exposure point concentration, and;
RfC is the reference concentration,
AT is the averaging time.

For the highest detected concentration and a commercial worker, Equation 2 becomes:

Equation 2 (worker): 0.0018 = 8
ℎ𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑜
𝑑𝑑𝑑𝑑𝑑𝑑 ×250𝑑𝑑𝑑𝑑𝑑𝑑𝑦𝑦 ×25 𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦×0.28 µ𝑔𝑔
𝑚𝑚3
(0.035 𝑚𝑚
𝑚𝑚3 × 24 ℎ𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑜
𝑑𝑑𝑑𝑑𝑑𝑑 ×365 𝑑𝑑𝑑𝑑𝑑𝑑𝑦𝑦 ×25 𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦×1000µ𝑔𝑔
𝑚𝑚3)
The calculated incremental carcinogenic risk from PCE is 1.35 x 10-7 (equal to 0.139 in one million). The Hazard Quotient (non-carcinogenic risk) is 0.0018. The incremental carcinogenic risk from PCE is less than the DTSC point of departure of 1.0 x 10-6 (equal to one in one million). The HQ is far less one (1). An HQ value greater than 1 indicates that the chemical exposure exceeds the level considered safe for long-term exposure by USEPA or DTSC. Given that the area with subsurface soil vapor PCE concentrations in excess of the DTSC human health risk level is almost entirely within the fitness center, which is only sporadically occupied by individuals for short periods of time (no employees regularly work in the space), actual carcinogenic risk is likely to be lower.

Gym Goer/Exerciser: DTSC requested an evaluation of the potential cancer risk and non-cancer hazard from chemicals detected in the indoor air samples based on a gym goer/exerciser as a sensitive use receptor, since this person may be exercising and exerting excessive activity with potential increased breath and heart rates. Exposure parameters for a typical gym goer/exerciser were obtained from the EPA Exposure Factor Handbook (EFH) (EPA 2011). The inhalation rate of 3.9 cubic meters per hour (m3
/hr) was obtained from EFH Table 6-28. Exercise was classified as heavy activity. The exposure time of one (1) hour per day of heavy exercise was derived from the total heavy activity time of 0.22 hours of heavy exercise shown in EFH Table 6-30 and rounded up to one hour. As a conservative assumption, it was assumed that an exerciser worked out in the gym 365 days a year. An exposure duration of five years was used based on the suggestion in an October 11, 2018 DTSC email from Ms. Kimberly Gettmann to Mr. Omo Patrick. Equations 1 and 2 do not have parameters for the higher breathing rate of an exerciser, 2333
Indoor Air Quality Assessment – 840 The City Drive South 8 so they were modified to account for the different breathing rates as shown in Equations 1A and 2A.

Equation 1A: 𝑅𝑅𝑅𝑅𝑅𝑅𝑅𝑅 = 𝑈𝑈𝑈𝑈𝑈𝑈×𝐸𝐸𝐸𝐸×𝐸𝐸 ×𝐸𝐸𝐸𝐸×𝐸𝐸𝐸𝐸𝐸𝐸×
𝐼𝐼𝐼𝐼ℎ𝐸𝐸𝐸𝐸
𝐼𝐼𝐼𝐼ℎ𝐶𝐶𝐶𝐶
(24×365×𝐴𝐴 )
Equation 2A: 𝐻𝐻𝐻𝐻 = 𝐸𝐸𝐸𝐸×𝐸𝐸 ×𝐸𝐸𝐸𝐸×𝐸𝐸𝐸𝐸𝐸𝐸×
𝐼𝐼𝐼𝐼ℎ𝐸𝐸𝐸𝐸
𝐼𝐼𝐼𝐼ℎ𝐶𝐶𝐶𝐶
( 𝑅𝑅 ×24×365×𝐴𝐴 ×1000)
Where InhEx is the inhalation rate for an exerciser and InhCW is the inhalation rate for a commercial worker. With the exerciser-specific exposure factors, the cancer risk and chronic health hazard calculations for the exerciser are shown using Equations 1A and 2A, respectively.

Equation 1A (exerciser): 2.38 × 10−8 =

0.0000061 �
µ𝑔𝑔
𝑚𝑚3�
−1
×1 ℎ𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑜
𝑑𝑑𝑑𝑑𝑑𝑑 ×365 𝑑𝑑𝑑𝑑𝑑𝑑𝑦𝑦 ×5 𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦×0.28 µ𝑔𝑔
𝑚𝑚3 × 3.9𝑚𝑚3
ℎ

0.83𝑚𝑚3
ℎ
(
24 ℎ𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑜
𝑑𝑑𝑑𝑑𝑑𝑑 ×365 𝑑𝑑𝑑𝑑𝑑𝑑𝑦𝑦 ×70 𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦)
Equation 2A (exerciser): 0.0002 =
1 ℎ𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑜
𝑑𝑑𝑑𝑑𝑑𝑑 ×365 𝑑𝑑𝑑𝑑𝑑𝑑𝑦𝑦 ×5 𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦×0.28 µ𝑔𝑔
𝑚𝑚3 × 3.9
𝑚𝑚3
ℎ𝑟𝑟

0.83𝑚𝑚3
ℎ𝑟𝑟
(0.035 𝑚𝑚
𝑚𝑚3 × 24 ℎ𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑜
𝑑𝑑𝑑𝑑𝑑𝑑 ×365 𝑑𝑑𝑑𝑑𝑑𝑑𝑦𝑦 ×25 𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦×1000µ𝑔𝑔
𝑚𝑚3)
The calculated cancer risk for the exerciser is 2.38 X10-8, well below 1x10-6. The HQ was calculated to be 0.0002, which is well below one (1). The health risks for an exerciser are less than the health risk for a commercial worker.

Residential: To assess risk for residential receptors, exposure was broken into exposure as a child and an adult. Adapting Equation 1 from the Indoor Air Quality Assessment Report for residential receptors results in the following equations:

Equation 1: 𝑅𝑅𝑅𝑅 = 𝑈𝑈𝑈𝑈𝑈𝑈×𝐸𝐸𝐸𝐸×𝐸𝐸 ×𝐸𝐸𝐸𝐸×𝐸𝐸𝐸𝐸𝐸𝐸
(24×365×𝐴𝐴 )
Equation 1 (child resident): 𝑅𝑅𝑅𝑅𝑅𝑅𝑅𝑅 = 𝑈𝑈𝑈𝑈𝑈𝑈×𝐸𝐸𝐸𝐸×𝐸𝐸 ×𝐸𝐸𝐸𝐸×𝐸𝐸𝐸𝐸𝐸𝐸× 𝐼𝐼𝐼𝐼ℎ𝐶𝐶ℎ𝑖𝑖𝑖𝑖
𝐼𝐼𝐼𝐼ℎ𝐴𝐴 𝐴𝐴
(24×365×𝐴𝐴 )
Where:

Risk is the cancer risk,
URF is the Unit Risk Factor,
ET is the exposure time,
EF is the exposure frequency,
ED is the exposure duration,
EPC is the exposure point concentration
InhChild is the inhalation rate of a child resident,
InhAdult is the inhalation rate of an adult resident, and; AT is the averaging time.

All exposure parameters are taken from the Human Health Risk Assessment (HHRA) Note 1 (HERO 2014) Table 1. For the highest detected concentration and a residential receptor, Equation 1 becomes:
2334
Indoor Air Quality Assessment – 840 The City Drive South 9 Equation 1 (resident child): 7.02 × 10−8 =

0.0000061 �µ𝑔𝑔
𝑚𝑚3�
−1
×24ℎ𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑜
𝑑𝑑𝑑𝑑 ×350𝑑𝑑𝑑𝑑𝑑𝑑𝑦𝑦 ×6 𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦×0.28 µ𝑔𝑔
𝑚𝑚3 ×
10𝑚𝑚3
𝑑𝑑𝑑𝑑𝑑𝑑
20𝑚𝑚3
𝑑𝑑𝑑𝑑𝑑𝑑
(
24 ℎ𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑜
𝑑𝑑𝑑𝑑𝑑𝑑 ×365 𝑑𝑑𝑑𝑑𝑑𝑑𝑦𝑦 ×70 𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦)
Equation 1 (resident adult): 4.70 × 10−7 = 0.0000061 �µ𝑔𝑔 𝑚𝑚3�
−1
×24ℎ𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑜
𝑑𝑑𝑑𝑑𝑑𝑑 ×350𝑑𝑑𝑑𝑑𝑑𝑑𝑦𝑦 ×20 𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦×0.28 µ𝑔𝑔
𝑚𝑚3
(
24 ℎ𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑜
𝑑𝑑𝑑𝑑𝑑𝑑 ×365 𝑑𝑑𝑑𝑑𝑑𝑑𝑦𝑦 ×70 𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦)
For the combined child and adult residential exposure, the cancer risk is 5.38x10-7 .

For the residential chronic hazard is calculated using Equation 2, modified for a child receptor.

Equation 2: 𝐻𝐻 = 𝐸𝐸𝐸𝐸×𝐸𝐸 ×𝐸𝐸𝐸𝐸×𝐸𝐸𝐸𝐸𝐸𝐸×
𝐼𝐼𝐼𝐼ℎ𝐸𝐸𝐸𝐸
𝐼𝐼𝐼𝐼ℎ𝐶𝐶𝐶𝐶
( 𝑅𝑅 ×24×365×𝐴𝐴 ×1000)
Equation 2 (child): 0.004 =
24 ℎ𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑜
𝑑𝑑𝑑𝑑𝑑𝑑 ×365 𝑑𝑑𝑑𝑑𝑑𝑑𝑦𝑦 ×6 𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦×0.28 µ𝑔𝑔
𝑚𝑚3 ×
10𝑚𝑚3
𝑑𝑑𝑑𝑑𝑑𝑑
20𝑚𝑚3
𝑑𝑑𝑑𝑑𝑑𝑑
(0.035 𝑚𝑚
𝑚𝑚3 × 24 ℎ𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑜
𝑑𝑑𝑑𝑑𝑑𝑑 ×365 𝑑𝑑𝑑𝑑𝑑𝑑𝑦𝑦 ×6 𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦𝑦×1000µ𝑔𝑔
𝑚𝑚3)

UNCERTAINTY ANALYSIS
Due to limitations of available scientific data and in the amount and type of site investigation data collected, every risk assessment will have uncertainties associated with it. The primary sources of uncertainty for the present risk assessment include:
• uncertainties in exposure parameter assumptions
• uncertainties in toxicity criteria
• uncertainties in the characterization and evaluation of the vapor intrusion pathway Uncertainties in exposure parameter assumptions are related to the general lack of quantitative studies describing important aspects of human behavior such as length of time spent at one residence or employer, time spent outdoors, etc. In general, this uncertainty has been dealt with by erring on the conservative side and using upper-bound exposure assumptions that will tend to overestimate the exposure occurring to most individuals. This approach to exposure parameter uncertainty is the basis for the Reasonable Maximum Exposure (RME) scenario concept (USEPA, 1989), and will tend to result in an overestimation of health risks.

Important uncertainties in toxicity criteria include: 1) the lack of an adequate toxicological basis for some toxicity criteria, and 2) the uncertainty associated with extrapolating oral route toxicity criteria to the inhalation/dermal route (or vice versa). The lack of toxicity criteria based on a solid database of underlying toxicological data results in a reduced ability to accurately quantify both non-cancer and cancer risks. This may result in both under- and over-estimation of health risks.

Regarding uncertainties in site characterization, two phases of soil vapor studies (URS in 2014 and SCS in 2015) were conducted, including 5-foot vapor probes and subslab sampling. These vapor studies show results that are consistent with one another in terms of VOC species (PCE 2335
Indoor Air Quality Assessment – 840 The City Drive South 10 only) and distribution (centered in the area of the former dry cleaning machine). In addition, two rounds of indoor air monitoring were conducted (as outlined in this report) with similar results.

These four phases of investigation indicate that the Property has been adequately characterized with minimal uncertainties. Note that the southern extent of the PCE soil vapor plume, outside and to the south of the building, has not been completely defined. However, the area south of the building consists of grass landscaped strip between the building and sidewalk, with no access from within the building. The likelihood of any solvent releases south of the building is considered minimal. Further, the distribution of the PCE soil vapor plume is consistent with the location of the former dry cleaning machine.

The most significant source of uncertainty in the present HRA is considered to be the evaluation of the vapor intrusion/indoor air exposure pathway using vapor intrusion modeling. Indoor air risks based on soil gas (at 5 feet bgs) were evaluated using a complex environmental fate and transport (vapor intrusion) model that includes numerous physical and chemical parameters regarding the expected behavior of soil vapors. These parameters have very high degrees of uncertainty associated with them. They are also highly dependent on site-specific conditions (e.g. soil type, soil temperature, soil water content, slab attenuation) which may or may not be accurately known or characterized, and which may vary greatly across the site and over time.

These uncertainties may result in either under or over-estimation of actual exposure. However, because the most permeable soil type was assumed for the vapor intrusion modeling (sand) based on site-specific data the likelihood of risk underestimation is minimized. Further, the default modeling parameters are selected to be highly conservative, that is, they will tend overestimate the potential for vapor intrusion.

Another source of uncertainty are the elevated method detection limits in the November 2018 samples due to a laboratory computer processing issue. However, as discussed above, in both the April and November 2018 data sets the method detection limits for PCE (0.07 and 0.34 ug/L, respectively) were below both the relevant residential and commercial/industrial screening levels (0.46 and 2.0 ug/L, respectively). In summary, the results of soil vapor modeling likely overestimated the potential for vapor intrusion and cancer and non-cancer health risks. This conclusion regarding the overestimation of vapor intrusion risks is confirmed by the results of the indoor air monitoring which show no significant PCE concentrations, if any, in indoor air. 5 SOIL AND GROUNDWATER DISCUSSION
As discussed above, in 1999, PCE was detected in one 0.5-foot soil sample collected near the former dry cleaning machine at a concentration of 15 µg/l (Dames & Moore, June 7, 1999). PCE was not detected above the laboratory reporting limit in the 5-foot sample from the same boring, or in four other borings to depths of 5 or 10 feet bgs, suggesting that the lateral and vertical extent of PCE in soil was limited to the area near the former dry cleaning machine. These data are consistent with the results of subsequent soil vapor surveys that showed trace concentrations of PCE (up to a maximum of 2.66 µg/L).

The Los Angeles Regional Water Quality Control Board (LARWQCB) has established cleanup guidelines to calculate site-specific screening levels (SSLs) for assessing the potential for groundwater contamination from VOCs in soil (LARWQCB, 1996). The LARWQCB cleanup guidelines provide a methodology utilizing attenuation factors (AFs) for calculating vadose zone screening/cleanup levels for VOC contaminants. With the AF method, contaminant 2336
Indoor Air Quality Assessment – 840 The City Drive South 11 concentrations in the vadose zone are assumed to attenuate with depth and lithology.

Screening/cleanup levels calculated with the AF method are maximally protective of groundwater quality. In SCS’ experience, the Santa Ana Regional Water Quality Control Board (SARWQCB) has accepted the LARWQCB’s guidance for use within the area of its jurisdiction.

SCS calculated site- and depth-specific SSLs for PCE using the LARWQCB methodology, conservatively assuming that the lithology between the surface and anticipated depth of groundwater (44 to 50 feet bgs) consisted of sandy sediments (no silt or clay, the presence of which would only increase the AFs and SSL). The AF and SSL calculations for PCE in soil are provided in the attached Table 2. As shown in the table, the site-specific SSL for PCE in soils between 0 and 5 feet bgs under a sandy soil scenario is 51.4 µg/L. The concentration of PCE detected at 0.5 feet bgs in 1999 (15 µg/L) was well below this conservatively-calculated, sitespecific SSL and therefore likely did not represent a risk to groundwater. This conclusion is supported by the fact that PCE was not detected in the 5-foot sample from the same boring, or in other soil samples from other borings at the Property, and is consistent with the results of soil vapor investigations showing trace levels of PCE (up to a maximum of 2.66 µg/L). Note that Table 2, in addition to the SSLs for soil, includes equivalent soil vapor concentrations, calculated using the LARWQCB methodology. All PCE soil vapor concentrations are also below the SSLs.

Since the source of the PCE (the dry cleaning machine) was removed in 1999, and no new sources of PCE have operated at the Property, it is reasonable to assume that concentrations in soil beneath the Property have further decreased over the subsequent 18+ years.

Figure 3 shows the soil vapor sampling locations and sub-slab soil vapor data from SCS’ March 2015 investigation. It also depicts the location of the cross-section shown in Figure 4. Figure 4 is a cross-section showing the one previous soil boring with detectable PCE (D&M, 1999) and soil vapor data from SCS’ March 2015 investigation, the former location of the dry cleaning machine, PCE iso-concentration contours for soil vapor, and depth-specific SSLs for soil and equivalent soil vapor concentrations. As shown, all PCE data – both soil and soil vapor – are far less than their respective SSLs. Figure 4 shows only traces of PCE, and no evidence of any significant subsurface mass of PCE. Therefore, no significant impact to groundwater (at a depth of 45 feet bgs) is anticipated.

To further evaluate impacts to groundwater, SCS reviewed information from the GeoTracker and EnviroStor websites. SCS identified one site within 0.5 miles of the Property where a past release of chlorinated solvents occurred. The Bristol Plaza site (GeoTracker ID: SL208443899), located approximately 0.49 miles to the east-northeast (cross-gradient) of the Property (on the opposite side of the Santa Ana River) reported a chlorinated solvent release that affected soil and soil vapor in the mid-1990s. The site was issued a “No Further Action” (NFA) letter by the SARWQCB in 2005, with VOCs still present in groundwater at concentrations above the California Maximum Contaminant Levels (MCLs) for drinking water. The Thrifty Oil #015 site (GeoTracker ID: T0605902120) is a leaking underground fuel tank site located approximately

1.05 miles to the south (downgradient) of the Property. Chlorinated VOCs were not detected in groundwater at more than a dozen monitoring wells sampled between 2012 and 2017. Other sites on GeoTracker and EnviroStor located within a mile of the Property include leaking underground fuel sites at which sampling for chlorinated VOCs is either not performed (because only fuel-related VOCs are analyzed) or not publically reported (because the case file is closed or laboratory reports are not available online).
2337
Indoor Air Quality Assessment – 840 The City Drive South 12 6 CONCLUSIONS AND RECOMMENDATIONS
SCS conducted two indoor air quality assessments – on March 29 to 30, 2018 and November 5 and 6, 2018 – at the former Cecilia’s Cleaners site located at 840 The City Drive South, Orange, California. Each IAQ event included two indoor air samples, one indoor air duplicate sample, and two ambient air (background) samples collected and analyzed for VOCs using EPA Method TO-15. Based on the results of these assessments, SCS has concluded the following:
• PCE, the primary VOC of concern at the Property, is not present in indoor air at concentrations above its residential or commercial/industrial DTSC-Recommended SL.

Health risk assessments conducted for the commercial worker, gym goer/exerciser, and residential scenarios did not identify cancer risk levels greater than 1x10-6 or hazard quotients greater than 1. Note that TCE and other PCE breakdown products were not detected in indoor air samples or ambient air samples during either monitoring event. • Twenty-nine VOCs were detected in indoor air samples, six of which (benzene, chloroform, 1,2-dichloroethane, carbon tetrachloride, naphthalene, and hexachlorobutadiene) were detected at concentrations exceeding either their respective residential or commercial/industrial DTSC-Recommended SLs. Each of these six VOCs was also detected in ambient air (AA) samples also at concentrations exceeding the DTSC-Recommended SLs, indicating that the Property is not a source of these VOCs in indoor air.
• Subsurface soil and soil vapor sampling did not identify PCE at levels that would pose a significant risk to groundwater, and there are no residuals of VOCs under the building that could pose a significant risk of vapor intrusion. Subsurface concentrations of PCE are low, limited in extent, and well defined. Soil vapor VOC concentrations over time show PCE concentrations are decreasing, suggesting that its presence is being removed by natural attenuation or diffusion.

In summary, the multiple lines of evidence discussed above have demonstrated that there is no significant risk to groundwater and the former dry cleaning operation poses no significant risk of vapor intrusion. In light of the available information, further investigation of soil, soil vapor, or groundwater at the Property is not recommended. On behalf of GPI-OCS, LLC, SCS respectfully requests that DTSC issue an NFA letter for the Property for unrestricted land use. 2338
Indoor Air Quality Assessment – 840 The City Drive South 13 7 REFERENCES
California Department of Toxic Substances Control (DTSC) and California Environmental Protection Agency (CalEPA), October 2011. Guidance for the Evaluation and Mitigation of Subsurface Vapor Intrusion to Indoor Air (Vapor Intrusion Guidance).

California Department of Toxic Substances Control (DTSC), October 2011. Guidance for the Evaluation and Mitigation of Subsurface Vapor Intrusion to Indoor Air.

California Department of Toxic Substances Control and Regional Water Quality Control Board, July 2015. Advisory – Active Soil Gas Investigations.

California Department of Toxic Substances Control, Office of Human and Ecological Risk (HERO), January 2018. Human Health Risk Assessment (HHRA) Note Number 3.

California Department of Toxic Substances Control EnviroStor Website:
https://www.envirostor.dtsc.ca.gov/public/.

California Environmental Protection Agency, State Water Resources Control Board Website:
https://geotracker.waterboards.ca.gov/.

California Regional Water Quality Control Board (Los Angeles Region), May 1996. Interim Site Assessment & Cleanup Guidebook.

SCS Engineers, April 2015. Additional Site Characterization Report, Former Cecilia’s Cleaners, 840 The City Drive South, Orange, California 92868.

URS Corporation, May 24, 2007. Phase I Environmental Site Assessment: Orange City Square, 750, 770, 790 and 840 The City Drive South, Orange, Orange County, California 92868.

URS Corporation, August 25, 2014. Soil Vapor Survey Report: Orange City Square, 770 & 840 The City Drive South, Orange, California.
2339
Indoor Air Quality Assessment – 840 The City Drive South FIGURE S 1 THROUGH 4
2340
Copyright:© 2011 National Geographic Society, i-cubed
0 1,000 2,000
Feet
FIGURE
1 3900 KILROY AIRPORT WAY, STE 100
LONG BEACH, CALIFORNIA 90806-6816

S C S E N G I N E E R S
4 SITE:

SITE LOCATION MAP
Job No.: 01214274.03
Title:

PROJECT SITE
840 THE CITY DRIVE SOUTH
ORANGE, CALIFORNIA 92868 2341
PROJ. NO.: DWN. BY:

APP. BY: 01214274.03
J. RAUZON
K. GREEN
CLIENT: SHEET TITLE:

PROJECT TITLE:

DATE:SCALE:FIGURE NO.:

GRANITE PROPERTIES
5601 GRANITE PARKWAY, SUITE 800
PLANO, TEXAS 75024
MARCH AND NOVEMBER 2018
2 FORMER CECILIA’S CLEANERS
840 THE CITY DIRVE SOUTH
ORANGE, CALIFORNIA 92868

GOOGLE EARTH AERIAL IMAGE SHOWING

INDOOR AND AMBIENT AIR SAMPLE LOCATIONS
05 10
Feet
N

SEE FIGURE

FITNESS
CLASS
ROOM

RESTROOMS &

LOCKER ROOMS
CLOSET
LEGEND

INDOOR AIR QUALITY SAMPLE

LOCATION

APPROXIMATE LOCATION

OF FORMER DRY CLEANING MACHINE

FORMER CECILIA CLEANERS SPACE (CURRENTLY

AN EMPLOYEE FITNESS CENTER)

AMBIENT AIR QUALITY SAMPLE

LOCATION
AA1
AA2 IA2/DUPLICATE
IA1
2342
PROJ. NO.: DWN. BY:

APP. BY: 01214274.03
J. RAUZON
K. GREEN
CLIENT: SHEET TITLE:

PROJECT TITLE:

DATE:SCALE:FIGURE NO.:

GRANITE PROPERTIES
5601 GRANITE PARKWAY, SUITE 800
PLANO, TEXAS 75024
JANURARY 2019
3 FORMER CECILIA’S CLEANERS
840 THE CITY DIRVE SOUTH
ORANGE, CALIFORNIA 92868

SOIL VAPOR, SUBSLAB, AND AIR SAMPLING LOCATIONS SHOWING

TETRACHLOROETHENE (PCE) CONCENTRATIONS
AND CROSS SECTION A-A’
0 5 10
Feet
N
1 INCH = 10 FEET
100

FITNESS
CLASS
ROOM

RESTROOMS &

LOCKER ROOMS
CLOSET
LEGEND

TEMPORARY SOIL VAPOR PROBE INSTALLED
BY URS CORPORATION (JULY 2014)

TEMPORARY SOIL VAPOR PROBE INSTALLED
BY SCS ENGINEERS (MARCH 2015)
SV4-3’ - 1,860 BORING ID-PROBE DEPTH (FEET BELOW GROUND SURFACE) -

TETRACHLOROETHENE (PCE) CONCENTRATION IN

MICROGRAMS PER CUBIC METER

SS SUB-SLAB SAMPLE

APPROXIMATE LOCATION

OF FORMER DRY CLEANING MACHINE
A
A’
CROSS SECTION A-A’ DEPICTED ON FIGURE 4
SV1-3’ - 1,460
SV2-3’ - 870
SV3-3’ - 1,600
SV6-3’ - 1,300
SV5-3’ - 2,660
SV10-3’ - 2,510
SCS1-SS - <100/40
SCS1-5’ - 380
SCS4-SS - 100
SCS4-5’ - 370
SV9-3’ - 770
SCS6-SS - 260
SCS6-5’ - 680
SCS7-SS - 40
SCS7-5’ - <100
SCS5-SS - 60
SCS5-5’ - 160
SCS2-SS - <20
SCS2-5’ - 980 SCS3-SS - <20
SCS3-5’ - <100

INDOOR AIR QUALITY SAMPLE
LOCATION (MARCH & NOVEMBER 2018)

AMBIENT AIR QUALITY SAMPLE
LOCATION (MARCH & NOVEMBER 2018)
SV4-3’ - 1,860
AA1 - ON ROOF AT

HVAC INTAKE
AA1 - 0.07J/5.4
AA2 - ON ROOF,
~95 FEET WEST
OF AA1
IA1 - 280J/<690
IA1 - 0.28J/<0.69 INDOOR & AMBIENT AIR SAMPLE ID -

PCE CONCENTRATION IN MICROGRAMS
PER CUBIC METER (MARCH 2018/NOVEMBER 2018)
IA2 - 0.14J/<0.69
IA2-DUPLICATE - 0.14J/<0.69
AA2 - 0.14J/<0.69
2343
2344
Indoor Air Quality Assessment – 840 The City Drive South TABLE S 1 AND 2
2345
Tetrachloroethene 2
Dichlorodifluoromethane
(Freon 12)
Chloromethane
Dichlorotetrafluoroethane
(Freon 114)
Bromomethane
Trichlorofluoromethane
(Freon 11)
1,1,2-Trichlorofluoroethane
(Freon 113)
Methylene Chloride
Carbon disulfide
2-Butanone
Chloroform
1,2-Dichloroethane
Benzene
Carbon Tetrachloride
4-Methyl-2-pentanone
(MIBK)
Toluene
2-Hexanone
Dibromochloromethane
Ethylbenzene
m,p-Xylene
Styrene
o-Xylene
4-Ethyltoluene
1,3,5-Trimethylbenzene
1,2,4-Trimethylbenzene
1,4-Dichlorobenzene
Naphthalene
1 1,2,4-Trichlorobenzene
1 Hexachlorobutadiene
IA-1 0.28 J 1.4 1.3 0.07 J 0.08 J 1.0 0.62 J 0.85 0.13 J 7.0 1.4 0.25 J 1.3 0.51 0.33 J 7.2 0.62 J 0.09 J 0.66 1.9 1.3 0.70 0.25 J 0.20 J 0.85 0.12 J 0.48 J 0.08 J 0.54 J IA-2 0.14 J 1.4 1.1 0.07 J 0.08 J 0.90 0.62 J 0.74 0.16 J 3.1 0.84 0.16 J 1.2 0.45 0.33 J 4.5 0.33 J <1.7 0.48 1.7 0.69 0.62 0.15 J 0.20 J 0.65 0.06 J 0.37 J <1.9 <2.7 IA-2 (Duplicate) 0.14 J 1.3 1.2 0.07 J 0.08 J 0.90 0.54 J 0.81 0.06 J 3.9 0.84 0.16 J 1.2 0.45 0.46 J 4.9 0.46 J <1.7 0.48 1.6 0.65 0.62 0.15 J 0.20 J 0.65 0.06 J 0.27 J <1.9 <2.7 AA-1 0.07 J 1.4 1.0 0.07 J 0.08 J 1.2 0.54 J 0.71 0.03 J 1.8 0.25 0.08 J 1.1 0.45 0.25 J 3.1 J 0.33 J <1.7 0.40 J 1.5 0.22 J 0.57 0.20 J 0.15 J 0.60 0.12 J 0.32 J 0.15 J 0.21 JAA-2 0.14 J 1.3 1.2 0.07 J 0.08 J 0.96 0.62 J 0.78 0.06 J 1.4 0.30 0.12 J 1.1 0.45 0.21 J 3.4 <0.08 <1.7 0.44 1.6 0.22 J 0.62 0.15 J 0.20 J 0.60 0.06 J 0.37 J 0.08 J <0.21 IA-1 <0.69 0.55 J 1.0 <0.71 <0.39 1.2 0.69 J 0.53 0.19 J 1.4 1.7 <0.41 0.49 0.45 0.33 J 1.8 0.33 J <1.7 0.26 J 0.62 0.86 0.26 J <0.50 <0.50 0.40 J <0.61 0.32 J <1.9 <2.7 IA-2 <0.69 0.40 J 1.1 <0.71 <0.39 1.2 0.62 J 0.56 0.19 J 0.93 0.89 <0.41 0.42 0.45 0.25 J 1.3 0.21 J <1.7 0.22 J 0.57 0.39 J 0.22 J <0.50 <0.50 0.30 J <0.61 0.90 0.53 J <2.7 IA-2 (Duplicate) <0.69 0.50 J 1.0 <0.71 <0.39 1.2 0.69 J 0.56 0.22 J 0.99 0.84 <0.41 0.45 0.45 0.21 J 1.3 <0.83 <1.7 0.22 J 0.53 0.35 J 0.22 J <0.50 <0.50 0.25 J <0.61 <0.53 <1.9 <2.7 AA-1 5.4 0.70 J 1.1 <0.71 <0.39 1.3 0.69 J 0.60 0.22 J 0.54 <0.25 <0.41 0.36 0.45 <0.83 1.3 <0.83 <1.7 <0.44 0.44 <0.43 <0.44 <0.50 <0.50 <0.50 <0.61 <0.53 <1.9 <2.7 AA-2 <0.69 0.55 J <0.27 <0.71 <0.39 1.3 0.69 J 0.56 0.16 J 0.57 J <0.25 <0.41 0.36 0.45 <0.83 0.92 <0.83 <1.7 <0.44 0.40 J <0.43 <0.44 <0.50 <0.50 <0.50 <0.61 <0.53 <1.9 <2.7

0.46 100 94 -- 5.2 1,300 -- 1.0 730 5,200 0.12 0.11 0.097 0.067 3,100 310 31 -- 1.1 100 940 100 -- 63 63 0.26 0.083 0.39 0.13

2.0 440 390 -- 22 5,300 -- 12 3,100 22,000 0.53 0.47 0.42 0.29 13,000 1,300 130 -- 4.9 440 3,900 440 -- 260 260 1.1 0.36 1.7 0.56 Notes:

VOCs = Volatile organic compounds - Only analytes detected are listed, refer to analytical report for full list.µg/m3 = micrograms per cubic meterAA = Ambient AirIA = Indoor Air< = Less than Laboratory Reporting LimitJ = VOC detected at concentration above the Laboratory Method Detection Limit, but below its Practical Quantification Limit; therefore, result is an estimated concentration.-- = Not Applicable or Available1 = For March 29-30, 2018 samples, analyte present in blank above the reported method detection limit, but below the reporting limit. 2 = Note, for the November 2018 laboratory results for PCE, the method detection limit (MDL) or nominal limit of detection was 0.34 ug/m3, and both the laboratory reporting limit (RL) and practical quantitation limit (PQL) was 0.69 ug/m3.

March 29-30,
2018
Residential DTSC-Recommended
SL
TABLE 1

SUMMARY OF INDOOR AND AMBIENT AIR SAMPLE RESULTS

FORMER CECILIA'S CLEANERS SITE
840 THE CITY DRIVE SOUTH, ORANGE, CALIFORNIA 92868
Sample ID Sample Date
VOCs (µg/m3)
EPA Method TO-15
micrograms per cubic meter (ug/m3)
Commercial/Industrial DTSCRecommended SL
DTSC-Recommended SL = Screening Levels recommended for Ambient Air in California Department of Toxic Substances Control (DTSC), Office of Human and Ecological Risk (HERO), Human Health Risk Assessment (HHRA) Note No. 3. for residential and commercial/industrial land use (June 2018, Referencing U.S. Environmental Protection Agency Regional Screening Level Reference Table - November 2018).

November 5-6,
2018
SCS Project No. 01214273.03 Page 1 of 1
2346
TABLE 2 SUMMARY OF LITHOLOGY INFORMATION AND ATTENUATION FACTOR CALCULATIONS FOR TETRACHLOROETHENE (PCE)

FORMER CECILIA'S CLEANERS
Depth Lithology Thickness above Groundwater
Interval Gravel Sand Silt Clay %Gravel %Sand %Silt %Clay Depth Depth Attenuation Factors MCL SSL (feet) (feet) above GW AFGR AFSA AFSI AFCL AFD AFT µg/kg µg/L 0-45 0 45 0 0 0.00% 100.00% 0.00% 0.00% 0 45 5 10 21 103 103 10 5 51.4 44.1 5-45 0 40 0 0 0.00% 100.00% 0.00% 0.00% 5 40 4 7 15 73 73 7 5 36.5 31.2 10-45 0 35 0 0 0.00% 100.00% 0.00% 0.00% 10 35 3 6 13 64 64 6 5 32.0 27.5 15-45 0 30 0 0 0.00% 100.00% 0.00% 0.00% 15 30 3 5 11 55 55 5 5 27.5 23.7 20-45 0 25 0 0 0.00% 100.00% 0.00% 0.00% 20 25 2 5 9 46 46 5 5 23.0 19.7 25-45 0 20 0 0 0.00% 100.00% 0.00% 0.00% 25 20 2 4 7 37 37 4 5 18.5 15.8 30-45 0 15 0 0 0.00% 100.00% 0.00% 0.00% 30 15 1 3 6 28 28 3 5 14.0 12.0 35-45 0 10 0 0 0.00% 100.00% 0.00% 0.00% 35 10 1 2 4 19 19 2 5 9.5 8.1 40-45 0 5 0 0 0.00% 100.00% 0.00% 0.00% 40 5 0 1 2 10 10 1 5 5.0 4.2 45 Depth to Groundwater (appx.) 45 0
formulas: Note:

AFT = (TGR/D)*AFGR + (TSA/D)*AFSA + (TSI/D)*AFSI + (TCL/D)*AFCL 1) The AFMAX value of 729 was used for calculation SSL = AFT * MCL of attenuation factors for gravel, sand, silt, AFMAX = 729 and clay. Source: RWQCB Interim
MCL = 5 Site Assessment and Cleanup Guidebook,
May 1996.
where:

TGR = Total thickness of gravel within D AFSA = Attenuation Factor - Sand 2) MCL value (5 ppb) source: Table 2, RWQCB TSA = Total thickness of sand within D AFSI = Attenuation Factor - Silt Interim Site Assessment and Cleanup TSI = Total thickness of silt within D AFCL = Attenuation Factor - Clay Guidebook, May 1996.

TCL = Total thickness of clay within D AFT = Attenuation Factor - Total D = Distance from ground water MCL = Maximum Contaminant Level AFGR = Attenuation Factor - Gravel SSL = Soil Screening Level µg/kg = parts per billion
840 THE CITY DRIVE SOUTH, ORANGE, CALIFORNIA 92868
SSL Equivalent Soil
Gas Concentration
Depth to Groundwater (appx.)
2347
Indoor Air Quality Assessment – 840 The City Drive South

APPENDIX A

SITE PHOTOS
2348
Photo 1 – View showing the location of sample AA1 on the roof above the fitness center tenant space (March 2018).

Photo 2 – View showing the location of sample AA2 on the southwestern corner of the roof of the building (March 2018).
2349
Photo 3 – View showing the meter on the valve of one of the Summa canisters at the time it was deployed (March 2018).

Photo 4 – View showing the location of sample IA1 in the exercise room (March 2018). 2350
Photo 5 – View showing samples IA2 and IA2-Duplicate (March 2018).

Photo 6 – One of the valves at the end of the 24 hour sampling period (March 2018). 2351
Photo 7 – View showing the location of sample AA1 on the roof above the fitness center tenant space (November 2018).

Photo 8 – View showing the location of sample AA2 on the southwestern corner of the roof of the building (November 2018).
2352
Photo 9 – View showing samples IA2 and IA2-Duplicate (November 2018). 2353
Indoor Air Quality Assessment – 840 The City Drive South

APPENDIX B

AIR SAMPLING SUMMARY LOG
2354
2355
2356
Indoor Air Quality Assessment – 840 The City Drive South

APPENDIX C

H&P LABORATORY REPORT -

INDOOR AIR
2357
10 April 2018
Enclosed is the analytical report for the above referenced project. The data herein applies to samples as received by H&P Mobile Geochemistry, Inc. on 03-Apr-18 which were analyzed in accordance with the attached Chain of Custody record(s).

Sincerely,
Client Project: 01214273.03/ 840 The City Drive S
H&P Project: SCS040318-12
Long Beach, CA 90806-6816
3900 Kilroy Airport Way, Suite 100
SCS Engineers - Long Beach
Mr. Justin Rauzon
Laboratory Director
Janis La Roux
Dear Mr. Justin Rauzon:

Quality. Accuracy. Experience. 2470 Impala Drive, Carlsbad, CA 92010 & Field Office - Signal Hill, CA P 1.800.834.9888 / 760.804.9678 F 760.804.9159 W handpmg.com Mobile
Geochemistry Inc.

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Result Analyte Limit
Reporting
Units
Dilution
MDL Factor Batch Prepared Analyzed Method Notes
IA-2 Duplicate (E804014-05) Vapor Sampled: 30-Mar-18 Received: 03-Apr-18 J- Report Styrene 0.65 0.04 0.43 ug/m3 1 ED80415 05-Apr-18 05-Apr-18 EPA TO-15 o-Xylene 0.62 0.04 0.44 " " " " " "
Bromoform ND 0.10 1.0 " " " " " "
1,1,2,2-Tetrachloroethane ND 0.07 0.70 " " " " " "
4-Ethyltoluene 0.15 0.05 0.50 " " " " " " J
1,3,5-Trimethylbenzene 0.20 0.05 0.50 " " " " " " J
1,2,4-Trimethylbenzene 0.65 0.05 0.50 " " " " " "
1,3-Dichlorobenzene ND 0.06 0.61 " " " " " "
1,4-Dichlorobenzene 0.06 0.06 0.61 " " " " " " J
1,2-Dichlorobenzene ND 0.06 0.61 " " " " " "
Naphthalene 0.27 0.05 0.53 " " " " " " B-03, J
1,2,4-Trichlorobenzene ND 0.08 1.9 " " " " " " B-03
Hexachlorobutadiene ND 0.21 2.7 " " " " " "
Surrogate: 1,2-Dichloroethane-d4 116 % 76-134 " " " "
Surrogate: Toluene-d8 108 % 78-125 " " " "
Surrogate: 4-Bromofluorobenzene 88.1 % 77-127 " " " "

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SCS Engineers - Long Beach
3900 Kilroy Airport Way, Suite 100
SCS040318-12
01214273.03/ 840 The City Drive S
Long Beach, CA 90806-6816 Mr. Justin Rauzon 10-Apr-18 16:17 H&P Mobile
Geochemistry Inc.
2470 Impala Drive
Carlsbad, CA 92010
760-804-9678 Phone
760-804-9159 Fax
Notes and Definitions
J- Report This sample is reported to the MDL or LOD determined for this method. All confirmed hits above the listed MDL or LOD value and below the RL/LOQ, will be flagged with a "J" result. If an MDL or LOD is not listed, the analyte is ND at the RL.

J Detected but below the RL/LOQ; therefore, result is an estimated concentration.

B-03 Analyte present in the blank above the reported MDL but below the reporting limit.

H&P is approved by the State of Arizona as an Environmental Testing Laboratory and Mobile Laboratory, certification numbers AZM758 and AZ0779.

H&P is approved by the State of Florida Department of Health under the National Environmental Laboratory Accreditation Conference (NELAC) certification number E871100.

The complete list of stationary and mobile laboratory certifications along with the fields of testing (FOTs) and analyte lists are available at www.handpmg.com/about/certifications.

All soil results are reported in wet weight.

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Date:
, , 31301..., c
Additional Instructions to Laboratory: F,,,ik 1;5A- ?er $‘404e. . * Preferred VOC units (please choose one):

SAMPLE NAME

FIELD POINT
NAME
(if applicable)
DATE
mm/dd/yy
TIME
24hr clock

SAMPLE TYPE
Indoor Air (IA), Ambient
Air (AA), Subslab (SS),
Soil Vapor (SV)

CONTAINER

SIZE & TYPE
400mUlLAL Summa,
Tedlar, Tube, etc.

CONTAINER
ID 1( 44)
Lab useonly: •
Receipt Vac
A A -1 03/Wig u0:45 AA ‘ L. 54.,,„,, _3-3G
_ ig- 1 y1
- 3 .32 )c.

Approved/Relinquished by: Company: Date: Time: Received by: Company: Dale: Time:
'Approval constitutes as authorization to proceed with analysis and acceptance of conditions on back Appendix 6A1, Rev 5/23/2016, Effective 5/23/2016 2372
Air Sampling into Summa (Indoor, Outdoor, Ambient)
Site Address:

Project Name:

Ambient Temp High/Low:

Indoor Air Temp Avg:

Wind Speed/Direction:

Other:

Potential Outdoor Sources of Pollution
Source
5 kree.i- 444;
Household Products
Ingredient(s)
70T/5‘1°F
(2.S 0.ft./6v1
Location Type
2373
26 November 2018
Enclosed is the analytical report for the above referenced project. The data herein applies to samples as received by H&P Mobile Geochemistry, Inc. on 08-Nov-18 which were analyzed in accordance with the attached Chain of Custody record(s).

Quality. Accuracy. Experience. 2470 Impala Drive, Carlsbad, CA 92010 & Field Office - Signal Hill, CA P 1.800.834.9888 / 760.804.9678 F 760.804.9159 W handpmg.com Mobile
Geochemistry Inc.

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SCS Engineers - Long Beach
3900 Kilroy Airport Way, Suite 100
SCS110818-11 Rev
01214274.03/ The City Dr S
Long Beach, CA 90806-6816 Mr. Justin Rauzon 26-Nov-18 15:44 H&P Mobile
Geochemistry Inc.
2470 Impala Drive
Carlsbad, CA 92010
760-804-9678 Phone
760-804-9159 Fax
Notes and Definitions
J-02 The MDL listed for this analyte is a nominal limit of detection, greater than the MDL but less than the RL. All confirmed hits above this listed MDL value and below the RL, will be flagged with a "J" result.

J Detected but below the RL/LOQ; therefore, result is an estimated concentration.

H&P is approved by the State of Arizona as an Environmental Testing Laboratory, certification number AZ0779.

H&P is approved by the State of Louisiana Department of Environmental Quality under the National Environmental Laboratory Accreditation Conference (NELAC) certification number 04138.

The complete list of stationary and mobile laboratory certifications along with the fields of testing (FOTs) and analyte lists are available at www.handpmg.com/about/certifications.

All soil results are reported in wet weight.

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X Standard Report ❑ Level Ill ❑ Level IV
❑ Excel EDD ❑ Other EDD:
) 5-7 day Stnd
❑ 3-day Rush
❑ 48-Hr Rush
❑ 24-Hr Rush
❑ Mobile Lab
❑ Other:

Sampler(s):
4 ..., ....,
• 447.4-0 el
Receipt
(
Notes/Tracking
q&TV01.6?
#:
01-1C(5(DODZI,
eli 4 2.2
Lab PM Ini als: tte)
Signature: p .

Date:
(yak_
❑ CA Geotracker Global ID:

SAMPLE NAME

FIELD POINT
NAME
(if applicable)
DATE
mm/dd/yy
TIME
24hr clock

SAMPLE TYPE
Indoor Air (IA), Ambient
Air (AA), Subslab (SS),
soil Vapor (SV)

CONTAINER

SIZE & TYPE
400mLilLJ6L Summa,
Tedlar, Tu14_etc.
sisklii r

CONTAINER
ID 44) (
Lab use only:

Approved/Relinquished by: Company: Dale: Time: Received by Company: Date: Time:
*Approval constitutes as authorization to proceed with analysis and acceptance of conditions on back Appendix 6A1, Rev 5/23/2016, Effective 5/23/2016 2388 Air Sampling into Summa (Indoor, Outdoor, Ambient)
Site Address:

Project Name:

Sample Collector:
43"-lo Yom. Lii1 Dc..ba eA
leLiNst 5
1147 az,e,c2.6et
Date:itil; -
Arrival Time:

Departure Time:

Wind Speed/Direction: 3 ,..01 5
Other:
2389

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2390
Appendix G:

Hydrology Supporting Information
2391

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2392
G-1: Preliminary Water Quality Management Plan
2393

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2394

PRELIMINARY

WATER QUALITY MANAGEMENTPLAN
(WQMP)

ORANGE APARTMENTS
840 The City Drive
Orange, CA 92868
COORDINATES: 33.774803, -117.890983
APN 231-261-09; 231-261-13; 231-261-15; 231-261-16; 231-261-17 Prepared for:

STREETLIGHTS CREATIVE STUDIO, LLC
2300 N Field St, Ste 800
Dallas, TX 75201
214-922-1182
Prepared by:

Kimley-Horn
1100 W. Town and Country Rd, Suite 700
Orange, CA 92868
714.939.1031
Michael Lepore, PE
Date Prepared: August 30, 2022
Public Works Director Date
City Engineer Date
2395

PREL IMINARY WATER QU AL IT Y MA NA GE ME NT PLA N (WQMP)

ORANGE APARTMENTS
STREETLIGHTSCREATIVESTUDIO,LLC i OWNER’SCERTIFICATION
PROJECT OWNER’S CERTIFICATION
Permit/Application No.: Pending Grading Permit No.: Pending Tract/Parcel Map and
Lot(s)No.: Pending Building PermitNo.: Pending
840 The City Dr, Orange, California 92868
Address of Project Site APN: 231-261-09; 231-261-13; 231-261-15; 231-261-16; 231- and APN: 261-17
COORDINATES: 33.774803, -117.890983
This Preliminary Water Quality Management Plan (WQMP) has been prepared for STREETLIGHTS CREATIVE STUDIO, LLC by Kimley-Horn. The WQMP is intended to comply with the requirements of the City of Orange Site Plan No. Pending requiring the preparation of the plan.

The undersigned, while it owns the subject property, is responsible for the implementation of the provisions of this plan and will ensure that this plan is amended as appropriate to reflect up-to-date conditions on the site consistentwith theCity ofOrange Local Implementation Plan (LIP), andthe intent of NPDES Permit and Waste Discharge Requirements for the City of Orange, County of Orange, Orange County Flood Control District and the incorporated Cities of Orange County within the Santa Ana Region.

This WQMP will be reviewed with the facility operator, facility supervisors, employees, tenants, maintenanceandservicecontractors,oranyotherpartyhavingresponsibilityforimplementingportions of this WQMP. Maintenance requirements within Section V and Appendix D will be adhered to with particular emphasis on maintaining theBMPs describedwithin Sections IV and V. TheOwner’s Annual SelfCertification Statement along with a BMP maintenance implementation table will be submitted by June 30th every year following project completion. At least one copy of the approved WQMP shall be available on the subject property in perpetuity.

Once the undersigned transfers its interest in the property, its successors-in-interest shall bear the aforementioned responsibility to implement and amend the WQMP. TheCity of Orangewill be notified of the change of ownership and the new owner will submit a new certification.

Signature: Date:

Name: Adam Covington
Title: Director of Development
Company: StreetLights Creative Studio, LLC
Address: 4180 La Jolla Village Dr, Ste 125, La Jolla, CA 92037 Email: [email protected]
Telephone #: 858.245.1937
2396

PREL IMINARY WATER QU AL IT Y MA NA GE ME NT PLA N (WQMP)

ORANGE APARTMENTS
STREETLIGHTSCREATIVESTUDIO,LLC ii OWNER’SCERTIFICATION

NOTICE OF TRANSFER OF RESPONSIBILITY
Water Quality Management Plan
WQMP Number – As assigned by the City of Orange: TBD
SubmissionofthisNoticeofTransferofResponsibilityconstitutesnoticetotheCitythatresponsibilityfor the Water Quality Management Plan (WQMP) for the subject property identified below, and implementation of that plan, is being transferred from the Previous Owner (and his/her agent) of the site (or portion thereof) to the New Owner, as further described below.

I. Previous Owner/ Responsible Party Information
Company/ Individual: Contact Person:

StreetAddress: Title:

City State Zip Phone:

II. Information about Site Relevant to WQMP
NameofProject:OrangeApartments
Title of WQMP applicable to site: Orange Apartments
Street Address of the site: 840 The City Dr, Orange, California 92868 DateofTransferofResponsibility:

III. New Owner/ Responsible Party Information
Company/ Individual: Contact Person:

StreetAddress: Title:

City State Zip Phone:
2397

PREL IMINARY WATER QU AL IT Y MA NA GE ME NT PLA N (WQMP) ORANGE APARTMENTS August 30, 2022
STREETLIGHTSCREATIVESTUDIO,LLC iii TABLE OFCONTENTS

TABLE OF CONTENTS
SECTION I DISCRETIONARY PERMITS AND WATER QUALITY CONDITIONS..............................1 SECTION II PROJECT DESCRIPTION...............................................................................................2 III.1 Project Description.................................................................................................................2 III.2 Project Purpose and Activities ...............................................................................................4 III.3 Potential Storm Water Pollutants ...........................................................................................4 III.4 Hydrologic Conditions of Concern ........................................................................................6 III.5 Post Development Drainage Characteristics ........................................................................8 III.6 Residential Projects................................................................................................................8 III.7 Property Ownership/Management.........................................................................................9 SECTION III SITE DESCRIPTION..................................................................................................10 III.1 Physical Setting....................................................................................................................10 III.2 Site Characteristics...............................................................................................................11 III.3 Watershed Description.........................................................................................................15 SECTION IV BEST MANAGEMENT PRACTICES (BMPs).............................................................16 IV.1 Site Design BMPs.................................................................................................................17 IV.2 Source Control BMPs...........................................................................................................19 IV.2.1 Non-Structural Source Control BMPs ..........................................................................19 IV.2.2 Structural Source Control BMPs ..................................................................................21 IV.3 Low Impact Development BMP Selection...........................................................................22 IV.3.1 Hydrologic Source Controls (HSCs)............................................................................23 IV.3.2 Infiltration BMPs............................................................................................................23 IV.3.3 Evapotranspiration & Rainwater Harvesting BMPs .....................................................25 IV.3.4 Biotreatment BMPs.......................................................................................................27 IV.3.5 Hydromodification Control BMPs.................................................................................29 IV.3.6 Regional/Sub-Regional LID BMPs ...............................................................................29 IV.3.7 Treatment Control BMPs ..............................................................................................29 IV.4 Water Quality Credits ...........................................................................................................29 IV.5 Alternative Compliance Plan Information ............................................................................29 IV.6 Vector Control.......................................................................................................................29 IV.7 Drainage Management Areas..............................................................................................30 IV.8 Calculations ..........................................................................................................................31 IV.8.1 85th Percentile Flow Rate ..............................................................................................31 2398

P R E L I M I N A R Y W A T E R Q U A L I T Y M A N A G E M E N T P L A N ( W Q M P ) ORANGE APARTMENTS August 30, 2022
STREETLIGHTS CREATIVE STUDIO, LLC iv TABLE OF CONTENTS
SECTION V IMPLEMENTATION, MAINTENANCE & INSPECTION RESPONSIBILITY FOR BMPs (O&M PLAN) 36
V.1 Frequency Inspection Matrix ............................................................................................ 37 V.2 Regulatory Permits ........................................................................................................... 40 V.3 Funding ........................................................................................................................... 40 V.4 Owner Self-Certification Statement .................................................................................. 41 V.5 BMP Implementation Tracking ......................................................................................... 42 SECTION VI LOCATION MAP, SITE PLAN AND BMP DETAILS .................................................. 44 SECTION VII EDUCATIONAL MATERIALS ...................................................................................... 48 APPENDICES ....................................................................................................................................... 49

APPENDICES
Appendix A ................................................................................. Conditions of Approval (Pending) Appendix B..................................................................................................... Educational Materials Appendix C .......................................................................................... BMP Details & Calculations Appendix D .................................................................................................................. O&M Plan Appendix E .....................................................................Geothechnical Report (For Reference Only) Appendix F ...................................................................................................Infiltration Test Results

LIST OF TABLES
Table 1. Site Design BMPs ........................................................................................................... 18 Table 2. Non-Structural Source Control BMPs .............................................................................. 19 Table 3. Structural Source Control BMPs ...................................................................................... 21 Table 4. Infiltration BMPs .............................................................................................................. 23 Table 5. Evapotranspiration, Rainwater Harvesting ....................................................................... 25 Table 6. Biotreatment BMPs ......................................................................................................... 27 2399

PREL IMINARY WATER QU AL IT Y MA NA GE ME NT PLA N (WQMP) ORANGE APARTMENTS August 30, 2022
STREETLIGHTSCREATIVESTUDIO,LLC 1 DISCRETIONARYPERMITS&WATERQUALITYCONDITIONS

SECTION I DISCRETIONARYPERMITSANDWATERQUALITY

CONDITIONS
WDID # [Pending]

PROJECT INFORMATION
Permit/Application No.: Pending Grading or Building
Permit No.: Pending
AddressofProjectSite
(or Tract Map and Lot
Number if no address)
and APN:
840 The City Dr, Orange, California 92868
APN: 231-261-09; 231-261-13; 231-261-15; 231-261-16; 231- 261-17

WATER QUALITY CONDITIONS OF APPROVAL OR ISSUANCE
Discretionary Permit(s): Pending – to be provided in Final WQMP Water Quality
Conditions of Approval
or Issuance applied to
this project:
(Please list verbatim.)
Pending Issuance - To be provided in Appendix A of the Final WQMP upon issuance by the City of Orange.

Water Quality Conditions of Approval (COA) are copied from full project COAs (Appendix A) and included here in the Final WQMP. 2400

PREL IMINARY WATER QU AL IT Y MA NA GE ME NT PLA N (WQMP) ORANGE APARTMENTS August 30, 2022
STREETLIGHTSCREATIVESTUDIO,LLC 2 PROJECT DESCRIPTION

SECTION II PROJECT DESCRIPTION
II.1 PROJECT DESCRIPTION
The proposed Orange Apartments project site encompasses approximately 3.76 acres in the City of Orange. The site is bounded by Garden Grove Boulevard to the south, and TheCityDrive South to the east. The SR-22 freeway is to the north of the site, and the SR-22 /SR-57/ I-5 interchange is located northeasterly of the site. A Vicinity Map is included in Section VI.

The table below summarizes the proposed project.

DESCRIPTION OF PROPOSED PROJECT
Planning Area/
Community Name: Uptown Orange – Riverview Golf Course
Project Area (ft2): 255,262 ft2 (5.86 acres)
# of Dwelling
Units: 225 Units
SIC Code:
6513 – Apartment Building Operators
4539 – Other Miscellaneous Store Retailers
7521 – Automobile Parking
Narrative Project
Description:

StreetLightsResidentialproposestoconstructone6-levelTypeIIIresidential buildingwith 2-subterranean levels ofparking.Theproposeddevelopment is anticipated to include 225 residential units, along with 9,000 square feet of mixed-use retail construction, 14 surface-level parking spaces, and 293 subterranean-level parking spaces. The proposed dwelling units per acre (du/acre) for this property would be (226 units /1.92 acres=) 117 du/acre.

The proposed development will also include one parking structure area in the southern area of the existing property. This parking structure will add 145 spaces and remove 88 spaces from the current parking lot area.

Overall, the project will add 352 residential parking spaces and 82 retail visitor parking spaces.
2401

PREL IMINARY WATER QU AL IT Y MA NA GE ME NT PLA N (WQMP) ORANGE APARTMENTS August 30, 2022
STREETLIGHTSCREATIVESTUDIO,LLC 3 PROJECT DESCRIPTION

DESCRIPTION OF PROPOSED PROJECT
Drainage Patterns/
Connections:

Under existing conditions, the site sheet flows to the south and east before connecting to a 54” City storm drain line. The City storm drain flows southeasterly before draining to the Santa Ana River. All runoff into Santiago Creek that is not infiltrated discharges to the Santa Ana River and ultimately the Pacific Ocean at Huntington Beach.

Under proposed conditions, runoffwill be conveyed via proposed curb and gutter and storm drain systems. Each of the proposed lots and structureswill be graded to drain towards the proposed private streets. Under final buildout conditions,low-flows and first-flush runoff from the stand-alone parking structure will be intercepted by curb and gutter prior to draining to a proposed Modular Wetland System BMPs. The mixed-use areaswill have low-flows and first- flush runoff go to one of three proposed Modular Wetland System BMPs. The proposed parking structures and the mixed-use area are allwithin three distinct areas of the property and all within different parcels. DMA 1 encompasses the stand along parking structure on the south west side of the site. DMA 2 encompasses the landscape and hardscape on the south side of the proposed mixed-use building, DMA 3 consists of approximately two-thirds of the roof drainage of the mix used building. DMA 4 consists of the remaining third of the roof drainage, and flow from landscape, hardscape, and drive aisle on the west and north side of the mixed-use building. Flow from all DMAs will be treated by flow based Modular Wetland Systems prior to discharging into the public storm drain system. TheseBMPswillbeprivately maintained.Conceptual BMP sizing has been included as part of this WQMP analysis. Flows beyond the capture efficiency volumewill bypass the system anddischarge directly to theSanta Ana River via the proposed private and existing public storm drain system.
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PREL IMINARY WATER QU AL IT Y MA NA GE ME NT PLA N (WQMP) ORANGE APARTMENTS August 30, 2022
STREETLIGHTSCREATIVESTUDIO,LLC 4 PROJECT DESCRIPTION

DESCRIPTION OF PROPOSED PROJECT
Development
Category
(Model WQMP,
Table 7.11-2; or

7.11-3):

6. Parking lots 5,000 square feet or more including associated drive aisle, and potentially exposed to urban stormwater runoff. A parking lot is defined as a land area or facility for the temporary parking or storage of motor vehicles used personally, for business, or for commerce.

8. All significantredevelopment projects,wheresignificantredevelopment is defined as the addition or replacement of 5,000 or more square feet of impervious surfaceon an already developedsite.Redevelopment does not include routine maintenance activities that are conducted to maintain original line and grade, hydraulic capacity, original purpose of the facility, or emergency redevelopment activity required to protect public health and safety.

If the redevelopment results in the addition or replacement of less than 50 percent of the impervious area on-site and the existing development was not subject to WQMP requirement, the numeric sizing criteria discussed in Section 7.II-2.0 only applies to the addition or replacement area. If the addition or replacement accounts for 50 percent or more of the impervious area, the Project WQMP requirements apply to the entire development.

Fortheproposed Orange Apartments project, 5.86 acres withinthe15.10 Acre Overall site will be disturbed as part ofthe project(approximately 40% ofthe parcel areas and 21% ofthe totalproperty).lessthan 50% ofthetotal site will besubjecttoredevelopment and therefore, the numeric sizing criteria apply only tothe redevelopment areas and not the entire property.

II.2 PROJECT PURPOSE AND ACTIVITIES
The purpose of the project is to redevelop the existing property into a podium-style residential developmentwith 225 apartment unitswith 9,000 square feet of mixed-usespace alongwith twolevels of subterranean parking. The project will also include a stand along parking structure (with 1 level of sub-surface parking) to the west of the podium-style development. Activities include all standard residential activities associatedwith attached residential developments aswell as mixed-use activities associated with restaurants and commercial developments. Further details on proposed residential facilities and activities are provided in Section II.6 below.

II.3 POTENTIAL STORM WATER POLLUTANTS
The table below, derived from Table 2.1 of the Countywide Model WQMP Technical Guidance Document (revised December 2013), summarizes the categories of land use or project features of concern and the general pollutant categories associated with them.

Priority Project Categories and/or Features: Attached Residential Development, Commercial/Industrial Development, Restaurants, Parking Lots 2403

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STREETLIGHTSCREATIVESTUDIO,LLC 5 PROJECT DESCRIPTION

POLLUTANTS OF CONCERN
Pollutant
E = Expected to be of
concern
N =Not Expected to
be of concern
Additional Information and Comments
Suspended Solid/
Sediment E
Nutrients E
Heavy Metals E
Pathogens
(Bacteria/Virus)
E
Pesticides E
Oil & Grease E
Toxic Organic
Compounds E
Trash & Debris E
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STREETLIGHTSCREATIVESTUDIO,LLC 6 PROJECT DESCRIPTION
II.4 HYDROLOGIC CONDITIONS OF CONCERN
The purpose of this section is to identify any hydrologic conditions of concern (HCOC) with respect to downstreamflooding,erosionpotentialofnaturalchannelsdownstream,impactsofincreasedflowson natural habitat, etc. As specified in Section 2.3.3 of the 2011 Model WQMP, projects must identify and mitigate any HCOCs. A HCOC is a combination of upland hydrologic conditions and stream biological and physical conditions that presents a condition of concern for physical and/or biological degradation of streams.

In the North Orange County permit area, HCOCs are considered to exist if any streams located downstreamfromtheprojectaredeterminedtobepotentiallysusceptibletohydromodificationimpacts and either of the following conditions exists:
▪ Post-development runoff volume for the 2-yr, 24-hr storm exceeds the pre-development runoff volume for the 2-yr, 24-hr storm by more than 5 percent or
▪ Time of concentration (Tc) of post-development runoff for the 2-yr, 24-hr storm event exceeds the time of concentration of the pre-development condition for the 2-yr, 24-hr storm event by more than 5 percent.

Iftheseconditions donot exist or streams arenot potentially susceptible tohydromodification impacts, an HCOC does not exist and hydromodification does not need to be considered further. In the North Orange County permit area, downstream channels are considered not susceptible to hydromodification, and therefore do not have the potential for a HCOC, if all downstream conveyance channels that will receive runoff from the project are engineered, hardened, and regularly maintained to ensure design flow capacity, and no sensitive habitat areas will be affected.

Is the proposed project potentially susceptible to hydromodification impacts? Yes No (show map)
The project site is not susceptible to hydromodification impacts. Please see attached map below in Figure XVI-3c.
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STREETLIGHTSCREATIVESTUDIO,LLC 7 PROJECT DESCRIPTION
Figure XVI-3c Susceptibility Analysis Santa Ana River

PROJECT SITE
840 THE CITY DR.
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STREETLIGHTSCREATIVESTUDIO,LLC 8 PROJECT DESCRIPTION
II.5 POST DEVELOPMENT DRAINAGE CHARACTERISTICS
Under proposed conditions, new on-site storm drains will be constructed and flows will be routed to proposed modular wetland biofiltration systems across the site. The modular wetland units have a built in internal bypass in which peak flows will bypass treatment and continue into the existing private storm drains and out into public storm drain in Garden Grove Blvd.

The public storm drain system conveys flow easterly into the Santa Ana River (E01) and ultimately discharges into the Pacific Ocean.

II.6 RESIDENTIAL PROJECTS

PROJECT FEATURES
Building
Summary:

Unit Type Count Mix Avg. GSF Area Total GSF Area
Studio 36 16% 643 23,148
1 Bed 102 45% 787 80,303
2 Bed 87 39% 1,203 105.824
Amenities: Leasing/Mail facility,fitness center,pet facility, courtyards andbike storage/repair, and rooftop deck within the mixed-use area.

Landscaped
Areas:

The project site will include landscaping in the form of shrubs, planter areas and turf areas throughout the perimeter areas of all portions of the site as well as within the interior courtyards and along walkways in the mixed-use portion of the site. It is assumed 5% of all portions of the site will be landscaped.

Parking Facilities:

A parking structure (2 levels) will be west of the proposed podium building.

One level of parking will be located at and above grade. The mixed-use building to the southeast will have two levels of subterranean parking.

Other Project
Features:

Trash from the new mixed-use residential portion of the site will be managed indoors by one trash room in the western ground-level floor area. Another indoor trash facility for the commercial and restaurant is located in the northern ground-level floor area. No outdoor trash storage areas are proposed.

The site will not have any outdoor storage areas, loading docks, vehicle/ communitycarwashracks orequipmentwashareas.However,theproposed project may include restaurant uses/food preparation areas.

Outdoor
Activities:

Outdooractivities areanticipatedwithpassiveuses inthecommon landscaped areas surrounding the building and for recreational and open space purposes.

All vehicular parking will be located in the proposed parking structure orwithin the mixed-use building at the perimeter(surface-level) or underneath (2-levels of subterranean). No outdoor storage of materials is anticipated. All other outdoor areas will be used forwalkways, common areas and landscaping, and other passive recreational purposes.
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STREETLIGHTSCREATIVESTUDIO,LLC 9 PROJECT DESCRIPTION

PROJECT FEATURES
Materials Stored:

No outdoor storage of materials is anticipated (materials will be stored indoors). Materials anticipated to be stored on-site include those associated withresidentialandcommercialdevelopments(i.e.cleaningproducts,storage, etc.); however, no hazardous wastes will be stored on-site.

Wastes
Generated:

The project is not anticipated to generate any wastes other than landscape clippings, typical trash, debris and refuse from the tenants. Outdoor trash receptacles will be provided throughout the common areas of the site for the tenants to dispose of their refuse in a proper manner, and these will have lids/covers that prevent storm water entry. Property maintenance will provide trash and waste material removal to maintain a trash-free property. Two indoor trash rooms will be located within the mixed-use building on the first floor. All wastes shall be collected and properly disposed of off-site. No dust/or particulates will be generated from post-construction operational uses.

II.7 PROPERTY OWNERSHIP/MANAGEMENT

PROPERTY OWNERSHIP/MANAGEMENT
Private Streets,
Drive Aisles &
Parking Lots:

Owner (StreetLights Creative Studio, LLC) or HOA/POA
Landscaped Areas: Owner (StreetLights Creative Studio, LLC) or HOA/POA Buildings: Owner (StreetLights Creative Studio, LLC) or HOA/POA Structural BMPs: Owner (StreetLights Creative Studio, LLC) or HOA/POA A Home Owners Association (HOA) as well as a Property Owner’s Association (POA) will be formed upon project completion. The HOA and POA will be responsible for inspecting and maintaining all BMPs prescribed for Orange Apartments. Until a HOA/POA is formally established, StreetLights Creative Studio, LLC shall assume all BMP maintenance and inspection responsibilities for the proposed project. Inspection and maintenance responsibilities are outlined in Section V of this report. 2408

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STREETLIGHTSCREATIVESTUDIO,LLC 10 SITE DESCRIPTION

SECTION III SITE DESCRIPTION
III.1 PHYSICAL SETTING
Address: 840 The City Dr, Orange, California 92868
Project Area Description:

Site is bounded by Garden Grove Boulevard to the south, and The City Drive South to the east. The SR-22 freeway is to the north of the site, and the SR-22 /SR-57/ I-5 interchange is located northeasterly of the site.

Land Use: High-Intensity Retail, Office, and Housing Development Zoning: Urban Mix Use
Predominant Soil Type:

Soil Type A
Impervious Conditions: Existing Impervious: 100%
Proposed Impervious: 90%
Pervious Conditions: Existing Pervious: 0%
Proposed Pervious: 10%
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STREETLIGHTSCREATIVESTUDIO,LLC 11 SITE DESCRIPTION
III.2 SITE CHARACTERISTICS
Precipitation
Zone: 0.80 inches per TGD Figure XVI-1
Site
Description:

The project site currently consists of a strip retail center in the parking lot of a large multi-building office complex owned by Granite Properties. The site is located northwest of the intersection of Garden Grove Boulevard and TheCityDrive South.

The Santa Ana River is located to the east of the site.

Topography: The site is relatively flat with a grade between 1-5% for all of the proposed improvement areas.

Existing
Drainage
Patterns/
Connections:

Thegradient oftheparkinglot is slopedsoutherly,andeasterly,anddischarges from the site via curb-core openings into The City Drive South and Garden Grove Boulevard, and sheet-flows from the driveway into Garden Grove Boulevard. There is an existing 21” storm drain line that runs across the site adjacent to the proposed mixed use building. The site drainage is intercepted via an existing curb-opening catch basin in Garden Grove Boulevard, located westerly of the project site. There is a 54” storm drain line, owned and maintained by City of Orange, in Garden Grove Boulevard. There is no public storm drain main line within The City Drive South. 2410

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ORANGE APARTMENTS August 30, 2022
STREETLIGHTSCREATIVESTUDIO, LLC 12 SITE DESCRIPTION
Soil Type,
Geology, and
Infiltration
Properties:

A field percolation testing was conducted on November 23, 2020 by Leighton Group, where two percolation tests yielded infiltration rates of 0.01 in/hr and 104.9 in/hr. Test sheets for two percolation tests were taken (LP-1 & LP-1a).

Leighton Group had intended to perform one test at a depth of 16 feet, however, subsurface conditions warranted adjustments.

The site surface is underlain by a sand unit 12 ft thick that had favorable infiltration rates (104 in/hr measured). Upon application of a recommended 2.5 factor of safety (FS) value, the resultant design rate in this zone is 42.0 in/hr. Below 12 feet was a clay unit extending to depths greater than 20 feet, which exhibited a very slow infiltration rate (0.01 in/hr measured), or a design rate of 0.004 in/hr upon application of FS value. Because both proposed buildings have sub-surface parking, infiltration tanks would need to be placed in the clay layer at or below the sub-surface pad where infiltration is infeasible.

The original site surfacewas manifest in a gentle south to southwesterly gradient. In theory, Leighton Group assumes contact between the sand and clay should mirror the original surface, and thus, infiltration waters should perch atop the clay and flow in a south-southwesterly direction and gradient similar to the original ground surface.
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STREETLIGHTSCREATIVESTUDIO, LLC 13 SITE DESCRIPTION
Hydrogeologic
(Groundwater)
Conditions:

The field percolation testing conducted on November 23, 2020 by Leighton Group, where two percolation tests were taken (LP-1 & LP-1a), yielded a depth to groundwater at 16 ft below ground surface (bgs).
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STREETLIGHTSCREATIVESTUDIO,LLC 14 SITE DESCRIPTION
Geotechnical
Conditions
(relevant to
infiltration)1:

There are no GeoTracker-listed cleanup sites within the vicinity of the project site.

Off-Site
Drainage:

The sitedoes not receive offsite run-on from adjacent properties or generate runoff that flows to offsite areas.

Utility and
Infrastructure
Information:

Dry and wet utilities will be incorporated into the proposed project and will tie into existing facilities associated with the existing development. Wet and dry utilities within the footprint of the proposed mixed use area will be relocated outside the drainage areas andwill not prevent the implementation of LIDBMPs for the project. 1 (Albus-Keefe & Associates, Inc., 2016)

THERE ARE NO GEOTECHNICAL CONDITIONS OF CONCERN IN THE
GENERAL VICINITY OF THE PROJECT SITE. 2413

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STREETLIGHTSCREATIVESTUDIO,LLC 15 SITE DESCRIPTION
III.3 WATERSHED DESCRIPTION
Watershed: Santa Ana River
Receiving Waters: Santa Ana River (Reach 2)
303(d) Listed
Impairments: Santa Ana River — bacteria (2010 list, delisted in 2016) Applicable TMDLs: None
Hydrologic Conditions of
Concern (HCOCs): Refer to Section II.4 for details.

Watershed Management
Priorities: Not Applicable
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STREETLIGHTSCREATIVESTUDIO,LLC 16 BEST MANAGEMENT PRACTICES SECTION IV BEST MANAGEMENT PRACTICES (BMPs)
Best Management Practices (BMPs) are programs and policies, including structural controls that are implemented to control the discharge of pollutants from the project site. This Section describes site design BMPs, source control BMPs, hydromodification control BMPs and treatment control BMPs.

The proposed LID BMPs discussed in Section IV.3 have been selected for the project based onthe feasibilitycriteria asdefinedin the 2011CountywideModel WQMPandTechnicalGuidanceDocument (TGD)2,3, as well as the project’s Pollutants of Concern, the BMP’s ability to effectively treat those pollutants, specific site conditions (such as presence of low-infiltrating soil layers), setbackrequirements from building foundations, retaining wall footings and utilities.

As identified in Section III.2, the geotechnical engineer, Leighton Group, identified that based on the composition of the lower layers of soil, infiltration is only considered feasible within the upper sand layers within the project site. Since both proposed buildings have proposed sub-surface parking, infiltration tanks would have to be located in the clay layer at or below the sub-surface slab grade, making infiltration infreasible. Since infiltration is infeasible, biolfiltration BMPs are proposed to treat the 85th percentile storm event prior to being conveyed into the public storm drains system.

Consistent with the Model WQMP, the following performance criteria have been applied to the project.

IsthereanapprovedWIHMPorequivalentfortheprojectareathatincludesmorestringentLIDfeasibility criteria or if there are opportunities identified for implementing LID on regional or sub-regional basis? Yes No
2 County of Orange Planning Division. (2011, May 19). Exhibit 7.II Model Water Quality Management Plan (WQMP). 3 County of Orange Planning Division. (2013, December 20). Exhibit 7.III Technical Guidance Document (TGD) for the Preparation of Conceptual/Preliminary and/or Project Water Quality Management Plans (WQMPs). 2415

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STREETLIGHTSCREATIVESTUDIO,LLC 17 BEST MANAGEMENT PRACTICES

PROJECT PERFORMANCE CRITERIA
Hydromodification
Control Performance
Criteria:
(Model WQMP Section

7.II-2.4.2.2)
If a hydrologic condition of concern (HCOC) exists, priority projects shall implement onsite or regional hydromodification controls such that:
▪ Post-development runoff volume forthe two-yearfrequency storm does not exceedthat ofthe predevelopment condition by more than five percent, and
▪ Time of concentration of post-development runoff for the two-year storm event is not less than that forthe predevelopment conditionby more than five percent.

Where theProject WQMPdocuments that excess runoff volume from the two-year runoff event cannot feasibly be retained and where in-stream controls cannot be used to otherwise mitigate HCOCs, the project shall implement on-site or regional hydromodification controls to:
▪ Retain the excess volume from the two-yearrunoff event to theMEP, and
▪ Implement on-siteorregional hydromodificationcontrolssuch that the post-development runoff two-year peak flow rate is no greater than 110 percent of the predevelopment runoff two-year peak flow rate.

LID Performance
Criteria:
(Model WQMP Section

7.II-2.4.3)
Infiltrate, harvest and use, evapotranspire, or biotreat/biofilter, the 85th percentile, 24-hour storm event (Design Capture Volume).

LIDBMPs mustbedesignedtoretain,on-site,(infiltrate, harvest anduse, or evapotranspire) storm water runoff up to 80 percent average annual capture efficiency.

Treatment Control
BMP Performance
Criteria:
(Model WQMP Section

7.II-3.2.2)
If it is not feasible to meet LID performance criteria through retention and/or biotreatment provided on-site or at a sub-regional/regional scale, then treatment control BMPs shall be provided on-site or offsite prior to discharge towaters of theUS.Sizing of treatment control BMP(s) shall be based on either the unmet flow after claiming applicable water quality credits, if appropriate.

LID Design Storm
Capture Volume:

TheSimpleMethodDCV calculation is not applicable since flow based biofiltration BMPS are proposed on site.

Refer to Section IV.7 for specific Drainage Manage Area (DMA) breakdown and Section IV.8 for detailed calculations (Worksheet B).

IV.1 SITE DESIGN BMPS
The following table describes the site design BMPs used in this project and the methods used to incorporate them.
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STREETLIGHTSCREATIVESTUDIO,LLC 18 BEST MANAGEMENT PRACTICES TABLE 1. SITE DESIGN BMPS

TECHNIQUE
INCLUDED?

IF NO, STATE JUSTIFICATION
YES NO
Minimize Directly Connected Impervious
Areas (DCIAs) (C-Factor Reduction)
Create Reduced or “Zero Discharge” Areas
(Runoff Volume Reduction)1
Minimize Impervious Area/Maximize
Permeability (C-Factor Reduction)2
Conserve Natural Areas
(C-Factor Reduction)
Theexistingsitedoes not have
natural areas to protect.

Notes:

1. Detention and retention areas incorporated into landscape design provide areas for retaining and detaining storm water flows, resulting in lower runoff rates and reductions in volume due to limited infiltration and evaporation. Such Site Design BMPs may reduce the size of Treatment Control BMPs.

2. The “C Factor” is a representation of the ability of a surface to produce runoff. Surfaces that produce higher volumes of runoff are represented by higher CFactors. By incorporating more pervious, lowerC Factor surfaces into a development, lower volumes of runoff will be produced. Lower volumes and rates of runoff translate directly to lowering treatment requirements.

Minimize Directly Connected Impervious Areas (DCIAs) (C-Factor Reduction) Landscapingwillbeprovidedadjacenttosidewalksandbetweentheproposedbuilding.Low-flowsand first-flush runoff will drain to biofiltration devices with built in trash capture devices prior to being conveyed offsite into the public storm drain system.

Create Reduced or “Zero Discharge” Areas (Runoff Volume Reduction) The proposed project will incorporate a vegetated swale on the east side of the proposed multi-use building that will collect flow and allow it to infiltrate int the shallow sand layer of soil below.

Minimize Impervious Area/Maximize Permeability (C-Factor Reduction) Impervious surfaces have been minimized by incorporating landscaped areas throughout the site surroundingtheproposedbuilding.Landscaping willbeprovidedthroughoutthesitewithinthecommon areas aswell as aroundtheperimeterandinteriorwalkways ofthemixedusebuildingandtheperimeter oftheparkingstructures.Overall theprojectwilldecreaseimpervious surfaces as comparedtoexisting conditions.
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STREETLIGHTSCREATIVESTUDIO,LLC 19 BEST MANAGEMENT PRACTICES IV.2 SOURCE CONTROL BMPS
IV.2.1 Non-Structural Source Control BMPs
The table below indicates all BMPs to be incorporated in the project. For those designated as not applicable (N/A), a brief explanation why is provided.

TABLE 2. NON-STRUCTURAL SOURCE CONTROL BMPS
ID Name Included? Not
Applicable?
If Not Applicable, Provide
Brief Reason
N1 EducationforPropertyOwners,
Tenants and Occupants
N2 Activity Restrictions
N3 Common Area Landscape
Management
N4 BMP Maintenance
N5 Title 22 CCR Compliance
(Howdevelopmentwillcomply)
Not applicable, residential
development
N6 Local Water Quality Permit
Compliance
The City of Orange does not
issue water quality permits.

N7 Spill Contingency Plan Not applicable, no fueling
on-site
N8 Underground Storage Tank
Compliance
No Underground Storage
tank is proposed
N9 Hazardous Materials
Disclosure Compliance
Nohazardousmaterialsites
are proposed
N10 Uniform Fire Code
Implementation
Not applicable, no
hazardous materials
proposed. However, the
building will be in
compliance with all
applicable fire codes
enforced by OFD.

N11 Common Area Litter Control
N12 Employee Training
N13 Housekeeping of Loading
Docks
No loading docks are
proposed
N14 Common Area Catch Basin
Inspection
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STREETLIGHTSCREATIVESTUDIO,LLC 20 BEST MANAGEMENT PRACTICES TABLE 2. NON-STRUCTURAL SOURCE CONTROL BMPS
ID Name Included? Not
Applicable?
If Not Applicable, Provide
Brief Reason
N15 Street Sweeping Private Streets
and Parking Lots
N16 Retail Gasoline Outlets No retail gasoline outlets are proposed
N1, Education for Property Owners, Tenants and Occupants Educational materials will be provided to tenants, including brochures and restrictions to reduce pollutants from reaching the storm drain system. Examples include tips for pet care, household tips, and proper household hazardouswaste disposal. Tenantswill beprovidedwith these materials by the property management prior to occupancy, and periodically thereafter. Refer to Section VII for a list of materials available and attached to this WQMP. Additional materials are available through the City of Orange Stormwater Program website (http://www.cityoforange.org) and the California Stormwater Quality Association’s (CASQA) BMP Handbooks (http://www.casqa.org/resources/bmp-handbooks).

N2, Activity Restrictions
TheOwner shalldevelopongoing activity restrictions that includethosethat havethepotential tocreate adverse impacts on water quality. Activities include, but are not limited to: handling and disposal of contaminants, fertilizer and pesticide application restrictions, litter control and pick-up, and vehicle or equipmentrepairandmaintenance,washingdownofimpervioussurfaces,aswellasanyotheractivities that may potentially contribute to water pollution. The site shall remain in compliance with the Orange Municipal Code, especially Chapter 7.

N3, Common Area Landscape Management
Management programs will be designed and implemented by the Owner to maintain all the common areas within the project site. These programs will cover how to reduce the potential pollutant sources offertilizerandpesticideuses,utilizationofwater-efficientlandscapingpracticesandproperdisposalof landscape wastes by the owner/developer and/or contractors.

N4, BMP Maintenance
The Owner will be responsible for the implementation and maintenance of each applicable nonstructural BMP, as well as scheduling inspections and maintenance of all applicable structural BMP facilities through its staff, landscape contractor, and/or any other necessary maintenance contractors.

Details on BMP maintenance are provided in Section V of this WQMP, and the O&M Plan is included in Section V and Appendix D.

N11, Common Area Litter Control
The Owner will be responsible for performing trash pickup and sweeping of littered common areas on aweeklybasisormoreoftenwhennecessary. Responsibilitieswillalsoincludenotingimproperdisposal materials by tenants.
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STREETLIGHTSCREATIVESTUDIO,LLC 21 BEST MANAGEMENT PRACTICES N12, Employee Training
Allemployees oftheOwnerandanycontractorswillrequiretrainingtoensurethat employees areaware of activities that may result in pollutants reaching the storm drain. Training will include, but not be limited to, spill cleanup procedures, proper waste disposal, housekeeping practices, etc.

N14, Common Area Catch Basin Inspection
All on-site catch basin inlets and drainage facilities shall be inspected and maintained by the Owner at least once a year, prior to the rainy season, no later than October 1st of each year.

N15, Street Sweeping Private Streets and Parking Lots
TheOwner shallberesponsibleforsweepingall on-sitedriveaislesanduncoveredparkingareaswithin the project on a weekly basis.

IV.2.2 Structural Source Control BMPs
The table below indicates all BMPs to be incorporated in the project. For those designated as not applicable (N/A), a brief explanation why is provided.

TABLE 3. STRUCTURAL SOURCE CONTROL BMPS
ID Name Included? Not
Applicable?
If Not Applicable, Provide
Brief Reason
S1 Provide storm drain system
stenciling and signage
S2
Design and construct outdoor
material storage areas to
reduce pollution introduction
No outdoor storage areas
are proposed.

S3
Designandconstructtrashand
waste storage areas to reduce
pollution introduction
No outdoor waste storage
areas are proposed.

S4
Use efficient irrigation systems
& landscape design, water
conservation, smart controllers,
and source control
S5 Protect slopes and channels
and provide energy dissipation
There are no slopes or
channelson theproject site.

S6 Properly Design: Dock areas No loading docks are
proposed.

S7 Properly Design: Maintenance
bays
No maintenance bays are
proposed.

S8 Properly Design: Vehicle wash
areas
No wash areas are
proposed.
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STREETLIGHTSCREATIVESTUDIO,LLC 22 BEST MANAGEMENT PRACTICES TABLE 3. STRUCTURAL SOURCE CONTROL BMPS
ID Name Included? Not
Applicable?
If Not Applicable, Provide
Brief Reason
S9 Properly Design: Outdoor
processing areas
Noprocessingareasare
proposed.

S10 Properly Design: Equipment
wash areas
No wash areas are
proposed.

S11 Properly Design: Fueling areas No fueling areas are proposed.

S12 Properly Design: Hillside
landscaping
There are no slopes or
channelson theproject site.

S13
Properly Design: Wash water
control for food preparation
areas
S14 Properly Design: Community
car wash racks
No car wash racks are
proposed.

S1, Provide storm drain system stenciling and signage
The phrase “NO DUMPING! DRAINS TO OCEAN” will be stenciled on all major storm drain inlets within the project site to alert the public to the destination of pollutants discharged into storm water.

Stencils shall be in place prior to release of certificate of occupancy. Stencils shall be inspected for legibility on an annual basis and re-stenciled as necessary.

S4, Use efficient irrigation systems & landscape design, water conservation, smart controllers, and source control
The Owner will be responsible for the installation and maintenance of all common landscape areas utilizingsimilarplanting materialswithsimilarwaterrequirementstoreduceexcessirrigation runoff. The Ownerwillberesponsibleforimplementingallefficientirrigationsystemsforcommonarealandscaping including, but not limited to, provisions for water sensors and programmable irrigation cycles. This includes smart timers, rain sensors, and moisture shut-off valves. The irrigation systems shall be in conformance with City water efficiency guidelines. Systems shall be tested twice per year, and water used during testing/flushing shall not be discharged to the storm drain system.

S13, Properly Design: Wash water control for food preparation areas All wash water from food prep areas will be controlled and proper staff training conducted by the site operator. Food preparation facilities shall meet all health and safety, building and safety and any other applicable regulations, codes requirements, including installation of a gravity grease interceptor.

IV.3 LOW IMPACT DEVELOPMENT BMP SELECTION
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Low Impact Development (LID) BMPs are required in addition to site design measures and source controls to reduce pollutants in storm water discharges. LID BMPs are engineered facilities that are designed to retain or biotreat runoff on the project site. The 4 th Term MS4 Storm Water Permit (Order
R8-2009-0030) requires the evaluation and use of LID features using the following hierarchy of treatment: infiltration, evapotranspiration, harvest/reuse, and biotreatment. The following sections summarize the LID BMPs proposed for the project in accordance with the permit hierarchy and performance criteria outlined in Section IV.1.

IV.3.1 Hydrologic Source Controls (HSCs)
Hydrologicsourcecontrols (HSCs)canbeconsideredtobea hybridbetween sitedesignpractices and LIDBMPs. HSCs are distinguished from site design BMPs in that they do not reduce the tributary area orreducethe imperviousness of adrainage area;ratherthey reduce the runoff volumethatwould result from a drainage area with a given imperviousness compared to what would result if HSCs were not used.

HSCs were not incorporated into the project’s design at this stage in the project’s development. Any HSC’s will be accounted for during final design and the cumulative volume of the HSC’s will be subtracted from the required treatment volume in the Final WQMP.

IV.3.2 Infiltration BMPs
Infiltration BMPs are LID BMPs that capture, store and infiltrate storm water runoff. These BMPs are engineered to store a specified volume ofwater and have no design surface discharge (underdrain or outletstructure)untilthisvolumeisexceeded. ExamplesofinfiltrationBMPsincludeinfiltrationtrenches, bioretentionwithoutunderdrains,drywells,permeablepavement,andundergroundinfiltrationgalleries.

TABLE 4. INFILTRATION BMPS
ID Name Included?
INF-3
INF-4
Bioretention Without Underdrains
Rain Gardens
Porous Landscaping
Infiltration Planters
Retention Swales
INF-2 Infiltration Trenches
INF-1 Infiltration Basins
INF-5 Drywells
INF-7 Subsurface Infiltration Galleries
-- French Drains
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PREL IMINARY WATER QU AL IT Y MA NA GE ME NT PLA N (WQMP) ORANGE APARTMENTS August 30, 2022
STREETLIGHTSCREATIVESTUDIO,LLC 24 BEST MANAGEMENT PRACTICES TABLE 4. Biofiltration BMPS
ID Name Included?
INF-6
Permeable Asphalt
Permeable Concrete
Permeable Concrete Pvers
Other:

Infiltration is considered infeasible for the proposed project since both structures have sub surface parking.

Therefore, the infiltration galleries would need to be placed at or below the sub-surface slab grade, which is at the depth of the clay layer of the existing soil that has a very low infiltration rate. 2423

PREL IMINARY WATER QU AL IT Y MA NA GE ME NT PLA N (WQMP) ORANGE APARTMENTS August 30, 2022
STREETLIGHTSCREATIVESTUDIO,LLC 25 BEST MANAGEMENT PRACTICES IV.3.3 Evapotranspiration & Rainwater Harvesting BMPs
TABLE 5. EVAPOTRANSPIRATION, RAINWATER HARVESTING
ID Name Included?
-- HSCs, see Section IV.3.1
-- Surface-based infiltration BMPs
-- Biotreatment BMPs, see Section VI.3.4
HU-1 Above-ground cisterns and basins
HU-2 Underground detention
-- Other:

In order to quantify harvested water demand for the common areas of the project, the Modified Estimated Applied Water Use (EAWU) method was used, consistent with Appendix X of the Model WQMP’s Technical Guidance Document (TGD), dated May 19, 2011.

The Modified EAWU method is modified from the OC Irrigation Code (County Ordinance No. 09-010) to account forthewet season demand and storm events (assuming that no irrigationwould be applied for approximately 30% of the days in the wet season).

The equation used to calculate the Modified EAWU is:

Where:

𝑀𝑜𝑑𝑖𝑓𝑖𝑒𝑑 𝐸𝐴𝑊𝑈 =
(𝐸𝑇𝑜wet × 𝐾L × 𝐿𝐴 × 0.015)
𝐼𝐸
Modified EAWU = estimated daily average water use during wet season ETowet= average reference ET from November through April (inches per month) per Table X.2 of the TGD
KL = landscape coefficient (Table X.4 of the TGD)
LA = landscape area irrigated with harvested water (square feet) IE = irrigation efficiency (assumed at 90%)
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PREL IMINARY WATER QU AL IT Y MA NA GE ME NT PLA N (WQMP) ORANGE APARTMENTS August 30, 2022
STREETLIGHTSCREATIVESTUDIO,LLC 26 BEST MANAGEMENT PRACTICES Note: Intheequation,thecoefficient(0.015) accountsfor unit conversions andshutdown ofirrigation during and for three days following a significant precipitation event.

For a system to be considered “feasible”, the system must be designedwith a storage volume equal to theDCV from the tributary area and achieve more than 40% capture. The system must also be able to drawdown in 30 days to meet the 40% capture value. In addition, Table X.6 of the Technical Guidance Document sets forth the demand thresholds for minimum partial capture.

TABLEX.6: HARVESTEDWATERDEMAND THRESHOLDSFOR

MINIMUM PARTIAL CAPTURE
Design Capture Storm
Depth, inches
Wet Season Demand Required for
Minimum Partial Capture,
gpd per impervious acre

0.60 490

0.65 530

0.70 570

0.75 610

0.80 650

0.85 690

0.90 730

0.95 770

1.00 810
2425

PREL IMINARY WATER QU AL IT Y MA NA GE ME NT PLA N (WQMP) ORANGE APARTMENTS August 30, 2022
STREETLIGHTSCREATIVESTUDIO,LLC 27 BEST MANAGEMENT PRACTICES Since the project does not capture and detain any runoff theproject sitedoes nothavesufficientwater demandduringthewetseasontosupport harvest and reuse. The project does not meet the minimum capture threshold of 650 gallons per day/acre with its Modified EAWU or estimated daily average water usage during the wet season.

IV.3.4 Biotreatment BMPs
TABLE 6. BIOTREATMENT BMPS
ID Name Included?
BIO-1
Bioretention with underdrains
Storm Water planter boxes with underdrains
Rain gardens with underdrains
BIO-5 Constructed wetlands
BIO-2 Vegetated swales
BIO-3 Vegetated filter strips
BIO-7 Proprietary vegetated biotreatment systems
BIO-4 Wet extended detention basin
BIO-6 Dry extended detention basins
-- Other:
2426

PREL IMINARY WATER QU AL IT Y MA NA GE ME NT PLA N (WQMP) ORANGE APARTMENTS August 30, 2022
STREETLIGHTSCREATIVESTUDIO,LLC 28 BEST MANAGEMENT PRACTICES Biotreatment BMPs will be utilized on-site for all Drainage Management Areas. The project will implement four proprietary biotreatment systems for water quality treatment to treat pollutants of concern to a medium to high level of effectiveness. The proposed system is the Modular Wetlands Systems developed by Bio Clean Environmental Services, Inc.

ModularWetlands byModularWetlandsSystems, Inc.areproprietarybiotreatment systems that utilize multi-stagetreatmentprocessesincludingscreeningmediafiltration,settling,andbiofiltration. Thepretreatment chamber contains the first three stages of treatment and includes a catch basin inlet filter to capture trash, debris, gross solids and sediments, a settling chamber for separating out larger solids, and a media filter cartridge for capturing fine TSS, metals, nutrients, and bacteria. Runoff then flows through thewetland chamberwhere treatment is achieved through a variety of physical, chemical, and biological processes. As storm water passes down through the planting soil, pollutants arefiltered, adsorbed, biodegraded and sequestered by the soil and plants, functioning similar to bioretention systems. The discharge chamber at the end of the unit collects treated flows and discharges back into the storm drain system.

This systemwas selectedbasedon its ability totreattheproject’spollutantsofconcerns toa mediumor high effectiveness, in accordance with the Model WQMP and TGD requirements.

Four Modular Wetland System (MWS) units will be installed to treat runoff from the proposed development in DMAs 1-4. Treated low flows and high flows will be piped down to the existing storm drain system and then be collected by City storm drain infrastructure.

In accordance with the Model WQMP and TGD, the bioretention/biotreatment BMPs will be sizedto treat runoff from the Design Capture Storm (85th percentile, 24-hour). Since Modular Wetlands are sized based on flow rate, theywere sized utilizing the methodology for flowbased BMPs (TGD Section III.1.2 and Worksheet D).

MODULAR WETLAND SYSTEM DESIGN SUMMARY
DMA(1) Area (ac) % Imp. Tc (min)
Rainfall
Intensity
(in/hr)
QDesign
(3)
(cfs) Size / Model(4)
Treatment
Capacity (5)
(cfs)
DMA 1 0.49 90% 5 0.26 0.105 MWS-L-4-8 0.115
DMA 2 0.07 90% 5 0.26 0.015 MWS-L-4-4 0.052
DMA 3 1.00 90% 5 0.26 0.215 MWS-L-8-8 0.230
DMA 4 0.96 90% 5 0.26 0.206 MWS-L-8-8 0.230
DMA 5 0.05 10% 5 0.26 - Self-Treating -
Notes:
(1) See also Section IV.2.2.
(2) Refer to WQMP Exhibit in Section VI for locations of each drainage area and BMP. (3) Detailed calculations and worksheets are included in Section IV.8. (4) Unit details and specifications are included in Section VI. (5) Treatment capacities of each unit are based onwetland media design loading rate (controlled by downstream orifice) and perimeter surface area of wetland media provided. Individual unit sizing calculations provided by the manufacturer are included on each cut sheet/detail included in Section VI.
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PREL IMINARY WATER QU AL IT Y MA NA GE ME NT PLA N (WQMP) ORANGE APARTMENTS August 30, 2022
STREETLIGHTSCREATIVESTUDIO,LLC 29 BEST MANAGEMENT PRACTICES Locations and tributary drainage areas are shown on the Preliminary WQMP Exhibit included in Section VI. BMP details and cross sections are included in Section VI as well. Detailed calculations and associated TGD Worksheets are included in Section IV.8 as well as Appendix C. Operation and maintenance details are included in Section V and Appendix D (O&M Plan). Further details on the proposed BMP designs, including final locations, footprints, and inverts will be provided in the Final WQMP.
2428

PREL IMINARY WATER QU AL IT Y MA NA GE ME NT PLA N (WQMP) ORANGE APARTMENTS August 30, 2022
STREETLIGHTSCREATIVESTUDIO,LLC 30 BEST MANAGEMENT PRACTICES IV.3.5 Hydromodification Control BMPs
Not applicable. Refer to Section II.4 for details.

IV.3.6 Regional/Sub-Regional LID BMPs
Not applicable.

IV.3.7 Treatment Control BMPs
Treatment control BMPs can only be considered if the project conformance analysis indicates that it is not feasible to retain the full design capture volume with LID BMPs.

TREATMENT CONTROL BMPs
ID Name Included?
TRT-1 Sand Filters
TRT-2 Cartridge Media Filter
PRE-1 Hydrodynamic Separation Device
PRE-2 Catch Basin Insert
Other:

Not applicable. LID BMPs (Biotreatment) will be utilized for water quality treatment on- site in accordance with the MS4 Permit hierarchy identified at the beginning of this Section.

IV.4 WATER QUALITY CREDITS
Not applicable. Water quality credits will not be applied for the project. LID BMPs will be utilized for water quality treatment on-site in accordancewith the MS4 Permit hierarchy identified at the beginning of this Section.

IV.5 ALTERNATIVE COMPLIANCE PLAN INFORMATION
Not applicable. LIDBMPswillbe utilized forwater quality treatment on-site in accordancewith the MS4 Permit hierarchy identified at the beginning of this Section.

IV.6 VECTOR CONTROL
2429

PREL IMINARY WATER QU AL IT Y MA NA GE ME NT PLA N (WQMP) ORANGE APARTMENTS August 30, 2022
STREETLIGHTSCREATIVESTUDIO,LLC 31 BEST MANAGEMENT PRACTICES Vector control issues are not considered an issue since flow based biofiltration devices do not allow any stagnant water to remain in the unti.

IV.7 DRAINAGE MANAGEMENT AREAS
In accordance with the MS4 permit and the 2011 Model WQMP, the project site has been divided into DrainageManagementAreas (DMAs)tobeutilizedfordefiningdrainageareas andsizingLIDandother treatment control BMPs. DMAs have been delineated based on the proposed site grading patterns, drainage patterns, storm drain and catch basin locations.

All Drainage Management Areas (DMAs) utilize flow based treatment control BMPs.The treatment flow rates (QDesign) for each DMA are summarized in Section IV.3.4 the table below. BMP sizing requirements, including 85
th percentile flow rate, depths, and other design details for the specific BMPs proposed areprovided inSections IV.3.1 and IV.3.4 below. Locations of DMAs and associated LID and treatment BMPs are identified on the exhibits in Section VI. Additional calculations and TGD Worksheets are provided in Section IV.8.
2430

PREL IMINARY WATER QU AL IT Y MA NA GE ME NT PLA N (WQMP) ORANGE APARTMENTS August 30, 2022
STREETLIGHTSCREATIVESTUDIO,LLC 32 BEST MANAGEMENT PRACTICES IV.8 CALCULATIONS
IV.8.1 85th Percentil Treatment Flow Rate
In accordancewith Section III.1.1 and Worksheet Bof the TGD, the projectDCV is calculated as follows:

Q= 𝐶 × i × 𝐴
Where:

𝐶 = (0.75 × 𝑖𝑚𝑝 + 0.15)
Q = treatment flow rate (cfs)
C = runoff coefficient
i = storm intensity
Imp = impervious fraction of drainage area
A = tributary area, in acres
Refer to Worksheet D for calculations for the individual DMAs. 2431
2432

PREL IMINARY WATER QU AL IT Y MA NA GE ME NT PLA N (WQMP) ORANGE APARTMENTS JANUARY 8, 2021
STREETLIGHTSCREATIVESTUDIO,LLC 36 BMPINSPECTION &MAINTENANCE

SECTION V IMPLEMENTATION, MAINTENANCE &
INSPECTION RESPONSIBILITY FOR BMPs
(O&M PLAN)
It has been determined that StreetLights Creative Studio, LLC, shall assume all BMP inspection and maintenance responsibilities for the Orange Apartments project.

Contact Name: Adam Covington, Director of Development
Company: StreetLights Creative Studio, LLC
Address: 4180 La Jolla Village Dr, Ste 125, La Jolla, CA 92037 Phone: 858.245.1937
Email: [email protected]
Should the maintenance responsibility be transferred at any time during the operational life of Orange Apartments, such as when an HOA or POA is formed for a project, a formal notice of transfer shall be submitted to the City of Orange at the time responsibility of the property subject to this WQMP is transferred. The transfer of responsibility shall be incorporated into this WQMP as an amendment.

The StreetLights Creative Studio, LLC shall verify BMP implementation and ongoing maintenance through inspection, self-certification, survey, or other equally effective measure. The certification shall verify that, at a minimum, the inspection and maintenance of all structural BMPs including inspection and performance of any required maintenance in the late summer / early fall, prior to the start of the rainyseason. Aformthatmaybeusedtorecordimplementation,maintenance,andinspectionofBMPs is included in Appendix D.

The City of Orange may conduct verifications to assure that implementation and appropriate maintenance of structural and non-structural BMPs prescribed within this WQMP is taking place at the projectsite. TheStreetLightsCreativeStudio,LLCshallretainoperations,inspectionsandmaintenance records of these BMPs and theywill be made available to theCity orCounty upon request. All records must be maintained for at least five (5) years after the recorded inspection date for the lifetime of the project.
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PREL IMINARY WATER QU AL IT Y MA NA GE ME NT PLA N (WQMP) ORANGE APARTMENTS JANUARY 8, 2021
STREETLIGHTSCREATIVESTUDIO,LLC 37 BMPINSPECTION &MAINTENANCE V.1 FREQUENCY INSPECTION MATRIX
TABLE 8. BMP INSPECTION & MAINTENANCE RESPONSIBILITY MATRIX BMP Inspection/Maintenance Activities Minimum
Frequency
Responsible
Party
NON-STRUCTURAL SOURCE CONTROL BMPs
N1, Education for
Property Owners, Tenants
and Occupants
Educational materialswill be provided to
tenants annually. Materials to be
distributed are found in Appendix B.

Tenantswill beprovidedthese materials
by the Owner prior to new occupancy
and annually thereafter.

At lease
signing &
annually
StreetLights
Creative
Studio,LLCor

HOA/POA
N2, Activity Restrictions
The Owner will prescribe activity
restrictions to protect surface water
quality, through lease terms or other
equally effective measure, for the
property.Restrictionsinclude,butarenot
limited to, prohibiting vehicle
maintenance, vehicle washing, and
washing of impervious areas.

Ongoing
StreetLights
Creative
Studio,LLCor

HOA/POA
N3, Common Area
Landscape Management
Maintenance shall be consistentwithCity
requirements. Fertilizer and/or pesticide
usage shall be consistent with City
Guidelines for Use of Fertilizers (LIP
Exhibit A-5.1V) as well as local
requirements. Maintenance includes
mowing,weeding, and debris removal on
aweekly basis. Trimming,replanting, and
replacement of mulch shall beperformed
on an as-needed basis to prevent
exposure of erodible surfaces. Trimmings,
clippings, and other landscape wastes
shall be properly disposed of in
accordance with local regulations.

Materials temporarily stockpiled during
maintenance activities shall be placed
away from water courses andstorm drain
inlets.

Weekly with
more in-depth
testing
Monthly
StreetLights
Creative
Studio,LLCor

HOA/POA
N4, BMP Maintenance
Maintenance of structural BMPs
implemented at the project site shall be
performedatthefrequencyprescribedin
this WQMP.Records of inspections and
BMP maintenance shall be kept by the
Owner and shall be available forreview
upon request.

Ongoing
StreetLights
Creative
Studio,LLCor

HOA/POA
2434

PREL IMINARY WATER QU AL IT Y MA NA GE ME NT PLA N (WQMP) ORANGE APARTMENTS JANUARY 8, 2021
STREETLIGHTSCREATIVESTUDIO,LLC 38 BMPINSPECTION &MAINTENANCE TABLE 8. BMP INSPECTION & MAINTENANCE RESPONSIBILITY MATRIX BMP Inspection/Maintenance Activities Minimum
Frequency
Responsible
Party
N11, Common Area
Litter Control
Litter patrol, violations investigations,
reporting and other litter control activities
shall be performed on aweekly basis and
in conjunctionwith routine maintenance
activities.

Weekly
StreetLights
Creative
Studio,LLCor

HOA/POA
N12, Employee Training
Educate all new employees/ managers
on storm water pollution prevention,
particularly good housekeeping practices,
prior to the start of the rainy season
(October 1). Refresher courses shall be
conducted on an annual or more often
basis.

Upon Hire
andAnnually
thereafter
StreetLights
Creative
Studio,LLCor

HOA/POA
N14, Common Area
Catch Basin Inspection
Catch basin inlets and other drainage
facilities shall be inspected after each
storm event and once per year. Inlets
and other facilities shall be cleaned prior
to the rainy season, by October 1 each
year.

Annually
StreetLights
Creative
Studio,LLCor

HOA/POA
N15, Street Sweeping
Private Streets and
Parking Lots
Privatestreets,driveaisles&anyexposed
parking areas must be swept at least
weekly, including prior to the start of the
rainy season (October 1).

Weekly
StreetLights
Creative
Studio, LLC or

HOA/POA
STRUCTURAL SOURCE CONTROL BMPs
S1, Provide storm drain
system stenciling and
signage
Stormdrainstencilsshallbeinspectedfor
legibility, at minimum, once prior to the
storm season, no later than October 1
each year. Those determined tobe
illegiblewill be re-stenciled as soon as
possible.

Annually
StreetLights
Creative
Studio,LLCor

HOA/POA
S4, Use efficient irrigation
systems & landscape
design, water
conservation, smart
controllers, and source
control
Inspect, test and adjust irrigation system
to eliminate overspray to hardscape
areas, ensure timing and cycle lengths
are correct.

Weekly Visual
inspection
testing 2x per
year
StreetLights
Creative
Studio,LLCor

HOA/POA
S13, Properly Design:

Wash water control for
food preparation areas
Food preparation areas will be inspected
on a regular basis to ensure proper waste
disposal and water usage procedures.

Any grease interceptors shall be inspected
and maintained in accordance with
manufacturer’s recommendations
(typically quarterly).

Quarterly
StreetLights
Creative
Studio,LLCor

HOA/POA
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PREL IMINARY WATER QU AL IT Y MA NA GE ME NT PLA N (WQMP) ORANGE APARTMENTS JANUARY 8, 2021
STREETLIGHTSCREATIVESTUDIO,LLC 39 BMPINSPECTION &MAINTENANCE TABLE 8. BMP INSPECTION & MAINTENANCE RESPONSIBILITY MATRIX BMP Inspection/Maintenance Activities Minimum
Frequency
Responsible
Party
LOW IMPACT DEVELOPMENT (LID) BMPs
The Modular Wetland units shall be
maintained in accordance with
manufacturer’s specifications. Thesystem
shall be inspected at a minimum of once
every six months, prior to the start of the
rainy season (October 1) each year, and
after major storm events. Typical
maintenance includes:

BIO-7, Proprietary
Biotreatment (Modular
Wetland System)
▪ Removing trash & debris from the
catchbasinscreeningfilter(byhand).
▪ Removal of sediment andsolids in the
settlement chamber(vacuumtruck).
▪ Replacement of the BioMediaGREENTM
filter cartridge and drain-down filter (if
equipped)
▪ Trim plants within the wetland
chamber as needed in conjunction
withroutinelandscapemaintenance
activities. No fertilizer shall beused.
2x per year
StreetLights
Creative
Studio,LLCor

HOA/POA
Wetland chamber should be inspected
during rain events to verify flow through
the system. If little to no flow is observed
from the lower valve or orifice plate, the
wetland media may require replacement.
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PREL IMINARY WATER QU AL IT Y MA NA GE ME NT PLA N (WQMP) ORANGE APARTMENTS JANUARY 8, 2021
STREETLIGHTSCREATIVESTUDIO,LLC 40 BMPINSPECTION &MAINTENANCE Any waste generated from maintenance activities will be disposed of properly. Wash water and other waste from maintenance activities is not to be discharged or disposed of into the storm drain system.

Clippings from landscape maintenance (i.e. prunings) will be collected and disposed of properly offsite, and will not be washed into the streets, local area drains/conveyances, or catch basin inlets.

V.2 REGULATORY PERMITS
None are required.

V.3 FUNDING
Long-term funding for BMP maintenance will be provided by StreetLights Creative Studio, LLC or the HOA through its standard operating budget.
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PREL IMINARY WATER QU AL IT Y MA NA GE ME NT PLA N (WQMP) ORANGE APARTMENTS JANUARY 8, 2021
STREETLIGHTSCREATIVESTUDIO,LLC 41 BMPINSPECTION &MAINTENANCE V.4 OWNER SELF-CERTIFICATION STATEMENT
As the owner representative of the Orange Apartments project forwhich a Water Quality Management Plan (WQMP) was approved by theCity, I hereby certify under penalty of lawthat all Best Management Practices contained within the approved Project WQMP have been maintained and inspected in accordance with the schedule and frequency outlined in the approved WQMP Maintenance Table.

The maintenance activities and inspections conducted are shown in the attached table and have been performed by qualified and knowledgeable individuals. Structural Treatment BMPs have been inspected and certified by a licensed professional engineer.

Tothe best of my knowledge, the information submitted is true andaccurate and complete. I amaware that there are significant penalties for submitting falseinformation, including the possibility of fines and citations for violating water quality regulations.

Signature: Date:

PREL IMINARY WATER QU AL IT Y MA NA GE ME NT PLA N (WQMP) ORANGE APARTMENTS JANUARY 8, 2021
STREETLIGHTSCREATIVESTUDIO,LLC 42 BMPINSPECTION &MAINTENANCE V.5 BMP IMPLEMENTATION TRACKING
This sheet is to be submitted annually with the Owner Self Certification Statement.

BMP IMPLEMENTATION TRACKING TABLE
BMP Activity Completion Dates
or Frequency
Initial

SOURCE CONTROL BMPS (STRUCTURAL AND NON-STRUCTURAL)
N1, Education for Property
Owners,Tenants&Occupants
Provideeducationalmaterials to
tenants.

Prior to occupancy,
annually thereafter
N2, Activity Restrictions
Restrict activities that have the
potentialtocreateadverseimpacts
on water quality
Ongoing
N3, Common Area Landscape
Management
Maintain landscaping, restrict use
of fertilizer & pesticides, properly
dispose landscape wastes.

Monthly
N4, BMP Maintenance MaintainBMPs in accordancewith
Section V and Appendix D.

Completion of
construction,
ongoing thereafter
N11, Common Area Litter Control Litter pick-up and patrol. Weekly N12, Employee Training
Educate all new employees/
managers on storm waterpollution
prevention practices.

Upon hire, annually
thereafter
N14, Common Area Catch Basin
Inspection
Inspectcatchbasininletsandclean
out as necessary.

Annually
N15,StreetSweepingPrivate
Streets and ParkingLots
Sweep exposed parking areas &
drive aisles. Weekly
S1, Provide storm drain system
stenciling and signage
Inspect for legibility and re-stencil if
needed. Annually
S4, Use efficient irrigation systems
& landscape design, water
conservation, smart controllers,
and source control
Inspect,testandadjustirrigation
systemtoeliminateoverspray to
hardscapeareas, ensure timing
and cycle lengths are correct.

Weekly visual
inspection
Testing 2x per year
S13, Properly Design: Wash
water control for food preparation
areas
Inspect food preparation areas
regularly. Inspect any grease
interceptors in accordance with
manufacturer’s recommendations.

Regular visual
inspection
Testing Quarterly
LOW IMPACT DEVELOPMENT AND TREATMENT BMPs*
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PREL IMINARY WATER QU AL IT Y MA NA GE ME NT PLA N (WQMP) ORANGE APARTMENTS JANUARY 8, 2021
STREETLIGHTSCREATIVESTUDIO,LLC 43 BMPINSPECTION &MAINTENANCE

BMP IMPLEMENTATION TRACKING TABLE
BMP Activity Completion Dates
or Frequency
Initial
BIO-7, Proprietary Biotreatment
(Modular Wetland System)
Maintain Modular Wetland units in
accordance with manufacturer’s
specifications. Inspectsystem ata
minimum of once every six months,
prior to the start of the rainy season
(October 1) each year, and after
major storm events. Inspect
Wetland chamber during rain
events to verify flow through the
system.
2x per year
* Structural Treatment BMPs shall be certified by a Licensed Professional Engineer. 2440

PREL IMINARY WATER QU AL IT Y MA NA GE ME NT PLA N (WQMP) ORANGE APARTMENTS JANUARY 8, 2021
STREETLIGHTSCREATIVESTUDIO,LLC 44 SITEPLAN&DRAINAGEPLAN

SECTION VI LOCATION MAP, SITE PLAN AND BMP DETAILS
The exhibits provided in this section are to illustrate the post construction BMPs prescribed within this WQMP. Drainageflowinformationoftheproposedproject,suchasgeneral surfaceflowlines, concrete orothersurfacedrainageconveyances,andstormdrainfacilitiesarealsodepicted. Allstructuralsource control and treatment control BMPs are shown as well.

EXHIBITS
▪ Vicinity Map
▪ Site Plan
▪ Preliminary WQMP Exhibit

BMP DETAILS & FACT SHEETS (INCLUDED IN APPENDIX C)
▪ UndergroundInfiltration (INF-7)
▪ Proprietary Biotreatment (BIO-7)
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PREL IMINARY WATER QU AL IT Y MA NA GE ME NT PLA N (WQMP) ORANGE APARTMENTS JANUARY 8, 2021
STREETLIGHTSCREATIVESTUDIO,LLC 45 SITEPLAN&DRAINAGEPLAN

VICINITY MAP

PROJECT SITE
2442

TECHNICAL GUIDANCE DOCUMENT APPENDICES
III-24 December 20, 2013
Worksheet D: Capture Efficiency Method for Flow-Based BMPs Step 1: Determine the design capture storm depth used for calculating volume 1 Enter the time of concentration, Tc (min) (See Appendix IV.2) Tc= 2 Using Figure III.4, determine the design intensity at which the estimated time of concentration (Tc) achieves 80% capture efficiency, I1
I1= in/hr
3 Enter the effect depth of provided HSCs upstream, dHSC (inches) (Worksheet A)
dHSC= inches
4 Enter capture efficiency corresponding to dHSC, Y2
(Worksheet A)
Y2= %
5 Using Figure III.4, determine the design intensity at which the time of concentration (Tc) achieves the upstream capture efficiency(Y2), I2
I2=
6 Determine the design intensity that must be provided by BMP, Idesign= I1-I2
Idesign=
Step 2: Calculate the design flowrate
1 Enter Project area tributary to BMP (s), A (acres) A= acres 2 Enter Project Imperviousness, imp (unitless) imp=
3 Calculate runoff coefficient, C= (0.75 x imp) + 0.15 C= 4 Calculate design flowrate, Qdesign= (C x idesign x A) Qdesign= cfs Supporting Calculations
Describe system:

Provide time of concentration assumptions:

DMA 1 5

0.26 0
0 0.26 0

0.49 0.90 0.825 0.105
MWS-L-4-8 has sufficient capacity (.115 cfs) to treat the 85the percentile storm event produced by this DMA.
5 minute Tc was assumed.
2443

TECHNICAL GUIDANCE DOCUMENT APPENDICES
III-25 December 20, 2013
Worksheet D: Capture Efficiency Method for Flow-Based BMPs Graphical Operations
Provide supporting graphical operations. See Example III.7.

0.26 2444

Provide time of concentration assumptions:

DMA 2 5

0.26 0
0 0.26 0

0.07 0.90 0.825 0.015
MWS-L-4-4 has sufficient capacity (.052 cfs) to treat the 85the percentile storm event produced by this DMA.
5 minute Tc was assumed.
2445

0.26 2446

Provide time of concentration assumptions:

DMA 3 5

0.26 0
0 0.26 0

1.00 0.90 0.825 0.215
MWS-L-8-8 has sufficient capacity (.230 cfs) to treat the 85the percentile storm event produced by this DMA.
5 minute Tc was assumed.
2447

0.26 2448

Provide time of concentration assumptions:

DMA 4 5

0.26 0
0 0.26 0

0.96 0.90 0.825 0.206
MWS-L-8-8 has sufficient capacity (.230 cfs) to treat the 85the percentile storm event produced by this DMA.
5 minute Tc was assumed.
2449

0.26 2450

PREL IMINARY WATER QU AL IT Y MA NA GE ME NT PLA N (WQMP) ORANGE APARTMENTS JANUARY 8, 2021
STREETLIGHTSCREATIVESTUDIO,LLC 45 SITEPLAN&DRAINAGEPLAN

VICINITY MAP
2451
GARDEN GROVE BLVD.

THE CITY DRIVE SOUTH LOADING ZONE

TRANSFORMERS
FDC

FIRE STAIR
EXIT
ACCESS
STAIR
ACCESS
STAIR
STOOPS

TRANSFORMERS

DIAL TOLL FREE
811 or

AT LEAST TWO DAYS

BEFORE YOU DIG
1-800-422-4133
DRAWN BY: KG
CHECKED BY: ML

PROJECT
NUMBER 194224003

UNDERGROUND SERVICE ALERT(USA) OF SOUTHERN CALIFORNIA
SHEET No.___________OF__________ SCALE: HORIZ.:________________ VERT.:_________________

SEE PLAN

CITY OF ORANGE

OFFICE OF THE CITY ENGINEER

WQMP EXHIBIT
LEGEND
NORTH

NON-STRUCTURAL SOURCE CONTROL
STRUCTURAL SOURCE CONTROL BMPs
2452

P RELIMINARY WATER QUALITY MANAGEMENT PLAN (WQMP)
ORANGE APARTMENTS JANUARY 8, 2021
STREETLIGHTS CREATIVE STUDIO, LLC 48 EDUCATIONAL MATERIALS

SECTION VII EDUCATIONAL MATERIALS
The educational materials included in this WQMP are provided to inform people involved in future uses, activities, or ownership of the site about the potential pitfalls associated with careless storm water management. “The Ocean Begins at Your Front Door” provides users with information about storm water that is/will be generated on site, what happens when water enters a storm drain, and its ultimate fate, discharging into the ocean. Also included are activities guidelines to educate anyone who is or will be associated with activities that have a potential to impact storm water runoff quality, and provide a menu of BMPs to effectively reduce the generation of storm water runoff pollutants from a variety of activities. The educational materials that may be used for the proposed project are included in Appendix B of this WQMP and are listed below.

EDUCATION MATERIALS
Residential Materials
(http://www.ocwatersheds.com)
Check If
Attached
Business Materials
(http://www.ocwatersheds.com)
Check If
Attached
The Ocean Begins at Your Front Door Tips for the Automotive Industry Tips for Car Wash Fund-raisers Tips for Using Concrete and Mortar Tips for the Home Mechanic Tips for the Food Service Industry Homeowners Guide for Sustainable
Water Use
Proper Maintenance Practices for Your
Business
Household Tips Other Materials
(http://www.ocwatersheds.com)
(https://www.casqa.org/resources/b
mp-handbooks)
Check If
Attached Proper Disposal of Household
Hazardous Waste
Recycle at Your Local Used Oil
Collection Center (North County) SD-10 Site Design & Landscape Planning Recycle at Your Local Used Oil
Collection Center (Central County) SD-12 Efficient Irrigation Recycle at Your Local Used Oil
Collection Center (South County) SD-13 Storm Drain Signage Tips for Maintaining Septic Tank Systems
Responsible Pest Control
Sewer Spill
Tips for the Home Improvement Projects
Tips for Horse Care
Tips for Landscaping and Gardening
Tips for Pet Care
Tips for Pool Maintenance
Tips for Residential Pool, Landscape and
Hardscape Drains
Tips for Projects Using Paint
Tips for Protecting Your Watershed
Other: Children’s Brochure
2453

P RELIMINARY WATER QUALITY MANAGEMENT PLAN (WQMP)
ORANGE APARTMENTS JANUARY 8, 2021
STREETLIGHTS CREATIVE STUDIO, LLC 49 APPENDICES

APPENDICES
Appendix A ................................................................................. Conditions of Approval (Pending) Appendix B................................................................................................... Educational Materials Appendix C ..........................................................................................BMP Details & Calculations Appendix D..................................................................................................................O&M Plan Appendix E...................................................................................................Infiltration Test Results 2454

APPENDIX A

CONDITIONS OF APPROVAL (PENDING)
2455

APPENDIX B

EDUCATIONAL MATERIALS
The Ocean Begins at Your Front Door - pg. 57
Homeowners Guide for Sustainable Water Use - pg. 59
Household Tips - pg. 61
Proper Disposal of Household Hazardous Waste - pg. 61
Recycle at Your Local Used Oil Collection Center (Central County) - pg. 65 Responsible Pest Control - pg. 67
Sewer Spill - pg. 69
Tips for Landscaping and Gardening - pg. 71
Tips for Pool Maintenance - pg. 73
Tips for Residential Pool, Landscape and Hardscape Drains - pg. 75 Tips for Protecting Your Watershed - pg. 77
Tips for the Food Service Industry - pg. 79
SD-10 Site Design & Landscape Planning - pg. 81
SD-12 Efficient Irrigation - pg. 85
SD-13 Storm Drain Signage - pg. 87
2456
For More Information
Aliso Viejo (949) 425-2535
Anaheim Public Works Operations (714) 765-6860
Brea Engineering (714) 990-7666
Buena Park Public Works . . . . . . . . . . . . (714) 562-3655 Costa Mesa Public Services (714) 754-5323
Cypress Public Works (714) 229-6740
Dana Point Public Works (949) 248-3584
Fountain Valley Public Works . . . . . . . . . . (714) 593-4441 Fullerton Engineering Dept. (714) 738-6853
Garden Grove Public Works (714) 741-5956
Huntington Beach Public Works . . . . . . . . (714) 536-5431 Irvine Public Works (949) 724-6315
La Habra Public Services (562) 905-9792
La Palma Public Works (714) 690-3310
Laguna Beach Water Quality (949) 497-0378
Laguna Hills Public Services (949) 707-2650
Laguna Niguel Public Works . . . . . . . . . . (949) 362-4337 Laguna Woods Public Works (949) 639-0500
Lake Forest Public Works . . . . . . . . . . . . (949) 461-3480 Los Alamitos Community Dev. (562) 431-3538
Mission Viejo Public Works (949) 470-3056
Newport Beach, Code & Water
Quality Enforcement (949) 644-3215
Orange Public Works (714) 532-6480
Placentia Public Works (714) 993-8245
Rancho Santa Margarita (949) 635-1800
San Clemente Environmental Programs . . . . (949) 361-6143 San Juan Capistrano Engineering (949) 234-4413
Santa Ana Public Works . . . . . . . . . . . . . (714) 647-3380 Seal Beach Engineering . . . . . . . . . . . . .(562) 431-2527 x317 Stanton Public Works (714) 379-9222 x204
Tustin Public Works/Engineering (714) 573-3150
Villa Park Engineering (714) 998-1500
Westminster Public Works/Engineering . . . .(714) 898-3311 x446 Yorba Linda Engineering . . . . . . . . . . . . (714) 961-7138 Orange County Stormwater Program (877) 897-7455
Orange County 24-Hour
Water Pollution Problem Reporting Hotline
1-877-89-SPILL (1-877-897-7455)
On-line Water Pollution Problem Reporting Form
w w w.o c w a t e r s h e d s.c o m
The Ocean Begins
at Your Front Door
California Environmental Protection Agency
www.calepa.ca.gov
• Air Resources Board
www.arb.ca.gov
• Department of Pesticide Regulation
www.cdpr.ca.gov
• Department of Toxic Substances Control
www.dtsc.ca.gov
• Integrated Waste Management Board
www.ciwmb.ca.gov
• Office of Environmental Health Hazard
Assessment
www.oehha.ca.gov
• State Water Resources Control Board
www.waterboards.ca.gov
Earth 911 - Community-Specific Environmental
Information 1-800-cleanup or visit www.1800cleanup.
org
Health Care Agency’s Ocean and Bay Water Closure
and Posting Hotline
(714) 433-6400 or visit www.ocbeachinfo.com
Integrated Waste Management Dept. of Orange
County (714) 834-6752 or visit www.oclandfills.com for
information on household hazardous waste collection
centers, recycling centers and solid waste collection
O.C. Agriculture Commissioner
(714) 447-7100 or visit www.ocagcomm.com
Stormwater Best Management Practice Handbook
Visit www.cabmphandbooks.com
UC Master Gardener Hotline
(714) 708-1646 or visit www.uccemg.com
Did You Know?
Most people believe that the largest source
of water pollution in urban areas comes from
specific sources such as factories and sewage
In fact, the largest source .treatment plants
of water pollution comes from city streets,
neighborhoods, construction sites and parking
This type of pollution is sometimes .lots
.called “non-point source” pollution
There are two types of non-point source
pollution: stormwater and urban runoff
.pollution
.Stormwater runoff results from rainfall
When rainstorms cause large volumes
of water to rinse the urban landscape,
.picking up pollutants along the way
Urban runoff can happen any time of
the year when excessive water use from
irrigation, vehicle washing and other
sources carries trash, lawn clippings and
. urban pollutants into storm drains other
Where Does It Go?
Anything we use outside homes, vehicles and
businesses – like motor oil, paint, pesticides,
fertilizers and cleaners – can be blown or washed
.into storm drains
A little water from a garden hose or rain can also
.send materials into storm drains
Storm drains are separate from our sanitary
sewer systems; unlike water in sanitary sewers
(from sinks or toilets), water in storm drains is
.not treated before entering our waterways
Printed on Recycled Paper
The Orange County Stormwater Program has created
and moderates an electronic mailing list to facilitate
communications, take questions and exchange ideas among its users about issues and topics related to stormwater and urban runoff and the implementation of program elements.

To join the list, please send an email to
[email protected]
Orange County Stormwater Program
Even if you live miles from the Pacific
Ocean, you may be unknowingly
polluting it.

Sources of Non-Point Source Pollution
.Automotive leaks and spills
Improper disposal of used oil and other engine
.fluids
Metals found in vehicle exhaust, weathered paint,
.rust, metal plating and tires
Pesticides and fertilizers from lawns, gardens and
.farms
Improper disposal of cleaners, paint and paint
.removers
Soil erosion and dust debris from landscape and
.construction activities
Litter, lawn clippings, animal waste, and other
.organic matter
.Oil stains on parking lots and paved surfaces
The Effect on the Ocean
Non-point source
pollution can have
a serious impact
on water quality
.in Orange County
Pollutants from the
storm drain system
can harm marine life
They can .as well as coastal and wetland habitats
also degrade recreation areas such as beaches,
.harbors and bays
Stormwater quality management programs have
been developed throughout Orange County to
educate and encourage the public to protect water
quality, monitor runoff in the storm drain system,
investigate illegal dumping and maintain storm
.drains
Support from Orange County residents and
businesses is needed to improve water quality
Proper use .and reduce urban runoff pollution
and disposal of materials will help stop pollution
.before it reaches the storm drain and the ocean
Dumping one quart of motor oil into a
storm drain can contaminate 250,000
gallons of water.
2457
Follow these simple steps to help reduce water
pollution:

Household Activities
Do not rinse spills with water. Use dry cleanup
methods such as applying cat litter or another
absorbent material, sweep and dispose of in
the trash. Take items such as used or excess
batteries, oven cleaners, automotive fluids,
painting products and cathode ray tubes, like
TVs and computer monitors, to a Household
Hazardous Waste Collection Center (HHWCC).

For a HHWCC near you call (714) 834-6752 or
visit www.oclandfills.com.

Do not hose down your driveway, sidewalk or
patio to the street, gutter or storm drain. Sweep
up debris and dispose of it in the trash.

Automotive
Take your vehicle to a commercial car
wash whenever possible. If you wash your
vehicle at home, choose soaps, cleaners, or
detergents labeled non-toxic, phosphate- free
or biodegradable. Vegetable and citrus-based
products are typically safest for the environment.

Do not allow washwater from vehicle washing
to drain into the street, gutter or storm drain.

Excess washwater should be disposed of in the
sanitary sewer (through a sink or toilet) or onto
an absorbent surface like your lawn.

Monitor your vehicles for leaks and place a pan
under leaks. Keep your vehicles well maintained
to stop and prevent leaks.

Never pour oil or antifreeze in the street, gutter
or storm drain. Recycle these substances at a
service station, a waste oil collection center or
used oil recycling center. For the nearest Used
Oil Collection Center call 1-800-CLEANUP or
visit www.1800cleanup.org.

Never allow pollutants to enter the
street, gutter or storm drain!
Lawn and Garden
Pet and animal waste
Pesticides
Clippings, leaves and soil
Fertilizer
Common Pollutants
Automobile
Oil and grease
Radiator fluids and antifreeze
Cleaning chemicals
Brake pad dust
Home Maintenance
Detergents, cleaners and solvents
Oil and latex paint
Swimming pool chemicals
Outdoor trash and litter
The Ocean Begins at Your Front Door
Trash
Place trash and litter that cannot be recycled in
securely covered trash cans.

Whenever possible, buy recycled products.

Remember: Reduce, Reuse, Recycle.

Pet Care
Always pick up after your pet. Flush waste down
the toilet or dispose of it in the trash. Pet waste,
if left outdoors, can wash into the street, gutter
or storm drain.

If possible, bathe your pets indoors. If you must
bathe your pet outside, wash it on your lawn or
another absorbent/permeable surface to keep
the washwater from entering the street, gutter or
storm drain.

Follow directions for use of pet care products
and dispose of any unused products at a
HHWCC.

Pool Maintenance
Pool and spa water must be dechlorinated and free
of excess acid, alkali or color to be allowed in the
street, gutter or storm drain.

When it is not raining, drain dechlorinated pool and
spa water directly into the
sanitary sewer.

Some cities may have ordinances that do not allow
pool water to be disposed of in the storm drain.

Check with your city.

Landscape and Gardening
Do not over-water. Water your lawn and garden by
hand to control the amount of water you use or set
irrigation systems to reflect seasonal water needs.

If water flows off your yard onto your driveway or
sidewalk, your system is over-watering. Periodically
inspect and fix leaks and misdirected sprinklers.

Do not rake or blow leaves, clippings or pruning
waste into the street, gutter or storm drain. Instead,
dispose of waste by composting, hauling it to a
permitted landfill, or as green waste through your
city’s recycling program.

Follow directions on pesticides and fertilizer,
(measure, do not estimate amounts) and do not use
if rain is predicted within 48 hours.

Take unwanted pesticides to a HHWCC to be
recycled. For locations and hours of HHWCC, call
(714) 834-6752 or visit www.oclandfills.com.
2458
Pet Waste
• Pollution: Pet waste carries bacteria through
our watersheds and eventually will be washed
out to the ocean. This can posea health risk to
swimmers and surfers.
• Solution: Pick up after your pets!
Trash and Debris
• Pollution: Trash and debris
can enter waterways by
wind, littering and careless
maintenance of trash
receptacles. Street sweeping
collects some of this trash;
however, much of what isn’t
captured ends up in our storm
drain system where it flows untreated out to the
ocean.
• Solution: Don’t litter and make sure trash
containers are properly covered. It is far more
expensive to clean up the litter and trash that ends
up in our waterways than it is to prevent it in the
first place. Come out to one of Orange County’s
many locations for Coastal and Inner-Coastal
Cleanup Day, which is held in September.

Motor Oil / Vehicle Fluids
• Pollution: Oil and petroleum products from our
vehicles are toxic to people, wildlife and plants.
• Solution: Fix any leaks
from your vehicle and
keep the maintenance
up on your car. Use
absorbent material such
as cat litter on oil spills,
then sweep it up and
dispose of it in the trash.

Recycle used motor oil
ata local Household Hazardous Waste Collection
Center.

Low Impact Development, Water Conservation
& Pollution Prevention
The Ocean Begins at Your Front Door
DID YOU KNOW?
Homeowners Guide
for Sustainable Water Use

A TEAM EFFORT
The Orange County Stormwater Program has teamed with the Municipal Water District of Orange County (MWDOC) and the University of California Cooperative Extension Program (UCCE) to develop this pamphlet.

Low Impact Development (LID) and sustainable water use prevents water pollution and conserves water for drinking and reuse. Reducing your water use and the amount of water flowing from your home protects the environment and saves you money.

Thank you for making water protection
a priority!
For more information,
please visit
www.ocwatersheds.
com/publiced/
www.mwdoc.com
www.uccemg.com
Pesticides and Fertilizer
• Pollution: The same pesticides
that are designed to be toxic to
pests can have an equally lethal
impact on our marine life. The
same fertilizer that promotes plant
growth in lawns and gardens
can also create nuisance algae
blooms, which remove oxygen
from the water and clog waterways
when it decomposes.
• Solution: Never use pesticides or fertilizer within 48 hours of an anticipated rainstorm. Use only as much
as is directed on the label and keep it off driveways and sidewalks.

Dirt and Sediment
• Pollution: Dirt or sediment can impede the flow of the stormwater and negatively impact stream habitat as it
travels through waterways and deposits downstream.

Pollutants can attach to sediment, which can then be
transported through our waterways.
• Solution: Protect dirt stockpiles by covering them with tarps or secure plastic sheets to prevent wind or rain from allowing dirt or sediment to enter the storm drain system.

Metals
• Pollution: Metals and other toxins present in car wash water can harm important plankton, which forms the base of the aquatic food chain.
• Solution: Take your car toa commercial car wash
where the wash water is captured and treated ata local
wastewater treatment plant.

The Pollution Solution
Several residential activities can result in water pollution. Among these activities are car washing and hosing off driveways and sidewalks. Both activities can waste water and result in excess runoff. Water conservation methods described in this pamphlet can prevent considerable amounts of runoff and conserve water. By taking your car toa commercial car wash and by sweeping driveways and sidewalks, you can further prevent the transport of pollutants to Orange County waterways. Here are some of the common pollutants for which you can be part of the solution:

To report a spill, call the Orange County 24-Hour Water Pollution Prevention Reporting Hotline
at 1-877-89-SPILL \ (1-877-897-7455)
Special Thanks to
The City of Los Angeles Stormwater Program for the use of its artwork The Metropolitan Water District of Southern California for the use of the CaliforniaFriendly Plant and Native Habitat photos Did you know that most of the pollution found in our waterways is not from a single source, but from a “nonpoint” source meaning the accumulation of pollution from residents and businesses throughout the community
2459
Options for Rainwater
Harvesting and Reuse
Rainwater harvesting is a great way to save
money, prevent pollution and reduce potable
water use. To harvest your rainwater, simply
redirect the runoff from roofs and downspouts to rain barrels.

Rain gardens are another option; these reduce runoff as well as encourage infiltration.

Downspout
Disconnection/Redirection
Disconnecting downspouts
from pipes running to the gutter
prevents runoff from transporting
pollutants to the storm drain.

Once disconnected, downspouts
can be redirected to rain gardens
or other vegetated areas, or be
connected to a rain barrel.

Rain Barrels
Rain barrels capture rainwater
flow from roofs for reuse in
landscape irrigation. Capacity
of rain barrels needed for your
home will depend on the amount
of roof area and rainfall received.

When purchasing your rain barrel,
make sure it includes a screen, a
spigot to siphon water for use, an
overflow tube to allow for excess
water to run out and a connector if
you wish to connect multiple barrels to add capacity of water storage.

Mosquito growth prevention is very important when installing a rain barrel.The best way to prevent mosquito breeding is to eliminate entry points by ensuring all openings are sealed tightly. If these methods are unsuccessful, products are available to kill mosquito larvae, but that are harmless to animals and humans. Regular application of these products is essential.Please visit the Orange County Vector Control website for more information at
www.ocvcd.org/mosquitoes3.php.

Rain Gardens
Rain gardens allow runoff to be directed from your roof downspout into a landscaped area. Vegetation and rocks in the garden will slow the flow of water to allow for infiltration into the soil. Plants and soil particles will absorb pollutants from the roof runoff. By utilizing a native plant palate, rain gardens can be maintained all year with minimal additional irrigation.

These plants are adapted to the semi-arid climate of Southern California, require less water and can reduce your water bill.

Before modifying your yard to install a rain
garden, please consult your local building and/or
planning departments to ensure your garden plan
follows pertinent building codes and ordinances.

Besides codes and ordinances, some home
owner associations also have guidelines for yard
modifications. If your property is in hill areas
or includes engineered slopes, please seek
professional advice before proceeding
with changes.

R unoff , R ainwater and R euse
For information on how to disconnect a
downspout or to install and maintain a
rain barrel or rain garden at your home,
please see the Los Angeles Rainwater
Harvesting Program, A Homeowner’s
“How-To” Guide, November 2009 at
www.larainwaterharvesting.org/
Water runoff from sprinklers left
on too long will carry pollutants
into our waterways.

Permeable pavement allows water runoff to
infiltrate through the soil and prevents most
pollutants from reaching the storm drain system.

What is Low Impact Development (LID)?
Low Impact Development (LID) is a method of development that seeks to maintain the natural hydrologic character of an area. LID provides a more sustainable and pollution-preventative approach to water management.

New water quality regulations require implementation of LID in larger new developments and encourage implementation of LID and other sustainable practices in existing residential areas.

Implementing modifications to your lawn or garden can reduce pollution in our environment, conserve water and reduce your water bill.

Where Does Water Runoff Go?
Stormwater, or water from rainfall events, and runoff from outdoor water use such as sprinklers and hoses flows from homes directly into catch basins and the storm drain system. After entering the storm drain, the water flows untreated into streams, rivers, bays and ultimately the Pacific Ocean. Runoff can come from lawns, gardens, driveways, sidewalks and roofs. As it flows over hard, impervious surfaces, it picks up pollutants.

Some pollutants carried by the water runoff include trash, pet waste, pesticides, fertilizer, motor oil and more.

Water Conservation
Pollution not only impairs the water quality for habitat and recreation, it can also reduce the water available for reuse. Runoff allowed to soak into the ground is cleaned as it percolates through the soil, replenishing depleted groundwater supplies. Groundwater provides at least 50% of the total water for drinking and other indoor household activities in north and central Orange County. When land is covered with roads, parking lots, homes, etc., there is less land to take in the water and more hard surfaces over which the water can flow.

In Orange County, 60-70% of water used by residents and businesses goes to irrigation and other outdoor uses. Reusing rainwater to irrigate our lawn not only reduces the impact of water pollution from runoff, but it also is a great way to conserve our precious water resources and replenish our groundwater basin.

Permeable pavement allows water
runoff to infiltrate through the soil
and prevents most pollutants from
reaching the storm drain system.

Other Water Conservation and
Pollution Prevention Techniques
Native Vegetation and Maintenance
“California Friendly” plants or native vegetation can significantly reduce water use. These plants often require far less fertilizers and pesticides, which are two significant pollutants found in Orange County waterways. Replacing water “thirsty” plants and grass types with water efficient natives is a great way to save water and reduce the need for potentially harmful pesticides and fertilizer.

Please see the California Friendly Garden Guide produced by the Metropolitan Water District of Southern California and associated Southern California Water Agencies for a catalog of California friendly plants and other garden resources at
www.bewaterwise.com/Gardensoft.

Weed Free Yards
Weeds are water thieves.

They often reproduce quickly
and rob your yard of both
water and nutrients. Weed
your yard by hand if possible.

If you use herbicides to
control the weeds, use only
the amount recommended on
the label and never use it if
rain is forecast within the next
48 hours.

Soil Amendments
Soil amendments such as green waste (e.g. grass clippings, compost, etc.) can be a significant source of nutrients and can help keep the soil near the roots of plants moist. However, they can cause algal booms if they get into our waterways, which reduces the amount of oxygen in the water and impacts most aquatic organisms. It is important to apply soil amendments more than 48 hours prior to predicted rainfall.

IRRIGATE

EFFICIENTLY
Smart Irrigation
Controllers
Smart Irrigation Controllers have
internal clocks as well as sensors
that will turn off the sprinklers
in response to environmental
changes. If it is raining, too windy or too cold, the
smart irrigation control sprinklers will automatically shut off.

Check with your local water agency for available rebates on irrigation controllers and smart timers. • Aim your sprinklers at your lawn, not the sidewalk – By simply adjusting the direction of your sprinklers
you can save water, prevent water pollution from
runoff, keep your lawn healthy and save money.
• Set a timer for your sprinklers – lawns absorb
the water they need to stay healthy within a few
minutes of turning on the sprinklers. Time your
sprinklers; when water begins running off your
lawn, you can turn them off. Your timer can be set
to water your lawn for this duration every time.
• Water at Sunrise – Watering early in the morning
will reduce water loss due to evaporation.

Additionally, winds tend to die down in the early
morning so the water will get to the lawn as
intended.
• Water by hand – Instead of using sprinklers,
consider watering your yard by hand. Handwatering ensures that all plants get the proper amount of water and you will prevent any water
runoff, which wastes water and carries pollutants
into our waterways.
• Fix leaks - Nationwide, households waste one
trillion gallons of water a year to leaks – that is
enough water to serve the entire state of Texas for
a year. If your garden hose is leaking, replace the
nylon or rubber hose washer and ensure a tight
connection. Fix broken sprinklers immediately.
2460
Do your part to prevent water
pollution in our creeks, rivers, bays
and ocean.

Clean beaches and healthy creeks, rivers,
bays, and ocean are important to Orange
County. However, many common household
activities can lead to
water pollution if you’re
not careful.

Litter, oil, chemicals and
other substances that
are left on your yard or
driveway can be blown
or washed into storm
drains that flow to the
ocean. Over-watering
your lawn and washing
your car can also flush
materials into the storm
drains. Unlike water in sanitary sewers
(from sinks and toilets), water in storm
drains is not treated.

You would never pour soap, fertilizers or oil
into the ocean, so don’t let them enter
streets, gutters or storm drains. Follow the
easy tips in this brochure to help prevent
water pollution. GENUINE

RECYCLED
P APER
50% PRE-CONSUMER
AND
15% POST-CONSUMER

REMEMBER THE

WATER IN YOUR

STORM DRAIN

IS NOT TREATED
BEFORE

IT ENTERS OUR

WATERWAYS
The Ocean Begins at Your Front Door
For more information,
please call the
Orange County Stormwater Program
at 1-877-89-SPILL (1-877-897-7455)
or visit
www.ocwatersheds.com
To report a spill,
call the
Orange County 24-Hour
Water Pollution Problem
Reporting Hotline
1-877-89-SPILL (1-877-897-7455).

For emergencies, dial 911.

The tips contained in this brochure provide useful
information to help prevent water pollution while
performing everyday household activities. If you
have other suggestions, please contact your city’s
stormwater representatives or call the Orange
County Stormwater Program.

Help Prevent Ocean Pollution:

Household Tips
2461
Gardening Activities
� Follow directions on pesticides and
fertilizers, (measure, do not estimate
amounts) and do not use if rain is
predicted within 48 hours.
� Water your lawn and garden by hand to
control the amount of water you use. Set
irrigation systems to reflect seasonal
water needs. If water flows off your yard
and onto your driveway or sidewalk,
your system is over-watering.
� Mulch clippings or leave them on the
lawn. If necessary, dispose in a green
waste container.
� Cultivate your garden often to control
weeds.

Washing and Maintaining Your Car
� Take your car to a commercial car wash
whenever possible.
� Choose soaps, cleaners, or detergents
labeled “non-toxic,” “phosphate free” or
“biodegradable.” Vegetable and citrusbased products are typically safest for the environment, but even these should
not be allowed into the storm drain.
� Shake floor mats into a trash can or
vacuum to clean.
� Do not use acid-based wheel cleaners and
“hose off” engine degreasers at home.

They can be used at a commercial facility,
which can properly process the washwater.
� Do not dump washwater onto your
driveway, sidewalk, street, gutter or
storm drain. Excess washwater should
be disposed of in the sanitary sewers
(through a sink, or toilet) or onto an
absorbent surface like your lawn.
� Use a nozzle to turn off water when not
actively washing down automobile.
� Monitor vehicles for leaks and place
pans under leaks. Keep your car well
maintained to stop and prevent leaks.
� Use cat litter or other absorbents and
sweep to remove any materials deposited
by vehicles. Contain sweepings and
dispose of at a HHWCC.
� Perform automobile repair and
maintenance under a covered area and
use drip pans or plastic sheeting to keep
spills and waste material from reaching
storm drains.
� Never pour oil or antifreeze in the
street, gutter or storm drains.

Recycle these substances at a service
station, HHWCC, or used oil recycling
center. For the nearest Used Oil
Collection Center call 1-800-CLEANUP
or visit www.ciwmb.ca.gov/UsedOil.

Pollution Prevention
Household Activities
� Do not rinse spills with water! Sweep
outdoor spills and dispose of in the trash.

For wet spills like oil, apply cat litter or
another absorbent material, then sweep
and bring to a household hazardous waste
collection center (HHWCC).
� Securely cover trash cans.
� Take household hazardous waste to a household hazardous waste collection center. � Store household hazardous waste in closed,
labeled containers inside or under a cover.
� Do not hose down your driveway, sidewalk or
patio. Sweep up debris and dispose of in trash.
� Always pick up after your pet. Flush waste
down the toilet or dispose of in the trash.
� Bathe pets indoors or have them
professionally groomed.

Household Hazardous Wastes include:
� Batteries
� Paint thinners, paint strippers and removers
� Adhesives
� Drain openers
� Oven cleaners
� Wood and metal cleaners and polishes
� Herbicides and pesticides
� Fungicides/wood preservatives
� Automotive fluids and products
� Grease and rust solvents
� Thermometers and other products
containing mercury
� Fluorescent lamps
� Cathode ray tubes, e.g. TVs, computer
monitors
� Pool and spa chemicals
For locations and hours of Household Hazardous Waste Collection Centers in Anaheim, Huntington Beach, Irvine and San Juan Capistrano, call (714)834-6752 or visit www.oclandfills.com. 2462 Ayude a prevenir
la contaminación del océano
Do your part to prevent
water pollution in our
creeks, rivers, bays and ocean.

Clean beaches and healthy
creeks, rivers, bays and ocean
are important to Orange County.

However, not properly disposing
of household hazardous waste can
lead to water pollution. Batteries,
electronics, paint, oil, gardening
chemicals, cleaners and other
hazardous materials cannot be
thrown in the trash. They also must
never be poured or thrown into
yards, sidewalks, driveways, gutters
or streets. Rain or other water could
wash the materials into the storm
drain and
eventually into
our waterways
and the ocean.

In addition,
hazardous
waste must not
be poured in
the sanitary
sewers (sinks
and toilets).

For more information,
please call the
Orange County Stormwater Program
at 1-877-89-SPILL (1-877-897-7455)
or visit
www.ocwatersheds.com
To Report Illegal Dumping of
Household Hazardous Waste
call 1-800-69-TOXIC
To report a spill,
call the
Orange County 24-Hour
Water Pollution Problem
Reporting Hotline
1-877-89-SPILL (1-877-897-7455).

For emergencies, dial 911.

ORANGE COUNTY
Help Prevent Ocean Pollution:

Proper Disposal of Household
Hazardous Waste
The Ocean Begins at
Your Front Door
Printed on Recycled Paper

NEVER DISPOSE

OF HOUSEHOLD

HAZARDOUS

WASTE IN THE

TRASH, STREET,

GUTTER,

STORM DRAIN
OR SEWER.
2463
Pollution Prevention
Leftover household products that contain
corrosive, toxic, ignitable, or reactive
ingredients are
considered to
be “household
hazardous waste”
or “HHW.” HHW
can be found
throughout your
home, including the
bathroom, kitchen,
laundry room and
garage.

Disposal of HHW down the drain, on the
ground, into storm drains, or in the trash
is illegal and unsafe.

Proper disposal of HHW is actually easy.

Simply drop them off at a Household
Hazardous Waste Collection Center
(HHWCC) for free disposal and recycling.

Many materials including anti-freeze, latexbased paint, motor oil and batteries can be recycled. Some centers have a “Stop &
Swap” program that lets you take partially
used home, garden, and automobile
products free of charge. There are four
HHWCCs in Orange County:

Anaheim:..................1071 N. Blue Gum St
Huntington Beach:.........17121 Nichols St
Irvine:............................ 6411 Oak Canyon
San Juan Capistrano:... 32250 La Pata Ave
Centers are open Tuesday-Saturday, 9 a.m.-
3 p.m. Centers are closed on rainy days and
major holidays. For more information, call
(714) 834-6752 or visit www.oclandfills.com.

Common household hazardous
wastes
Batteries
Paint and paint products
Adhesives
Drain openers
Household cleaning products
Wood and metal cleaners and polishes
Pesticides
Fungicides/wood preservatives
Automotive products (antifreeze, motor
oil, fluids)
Grease and rust solvents
Fluorescent lamps
Mercury (thermometers & thermostats)
All forms of electronic waste including
computers and microwaves
Pool & spa chemicals
Cleaners
Medications
Propane (camping & BBQ)
Mercury-containing lamps
Television & monitors (CRTs,
flatscreens)
Tips for household hazardous
waste
Never dispose of HHW in the trash,
street, gutter, storm drain or sewer.

Keep these materials in closed, labeled
containers and store materials indoors
or under a cover.

When possible, use non-hazardous
products.

Reuse products whenever possible or
share with family and friends.

Purchase only as much of a product as
you’ll need. Empty containers may be
disposed of in the trash.

HHW can be harmful to humans,
pets and the environment. Report
emergencies to 911.

WHEN POSSIBLE,
USE

NON-HAZARDOUS
OR

LESS-HAZARDOUS
PRODUCTS.
2464
Help Prevent Ocean Pollution:

Recycle at Your
Local Used Oil
Collection
Center

CENTRAL COUNTY
For more
information, please call the Orange
County Stormwater Program at
1-877-89-SPILL (1-877-897-7455)
or visit www.watersheds.com.

For information about the proper
disposal of household hazardous waste,
call the Household Waste Hotline at
(714) 834-6752
or visit www.oclandfills.com.

For additional information about the
nearest oil recycling center, call the Used
Oil Program at
1-800-CLEANUP
or visit www.cleanup.org.

Did you know that just
one quart of oil can pollute 250,000
gallons of water?
A clean ocean and healthy creeks, rivers,
bays and beaches are important to Orange
County. However, not properly disposing of
used oil can lead to water pollution. If you
pour or drain oil onto driveways, sidewalks
or streets, it can be washed into the storm
drain. Unlike water in sanitary sewers (from
sinks and toilets), water in storm drains is
not treated before entering the ocean. Help
prevent water pollution by taking your used
oil to a used oil collection center.

Included in this brochure is a list of
locations that will accept up to five gallons
of used motor oil at no cost. Many also
accept used oil filters. Please contact the
facility before delivering your used oil. This
listing of companies is for your reference
and does not constitute a recommendation
or endorsement of the company.

Please note that used oil filters may not be
disposed of with regular household trash.

They must be taken to a household
hazardous waste collection or recycling
center in Anaheim, Huntington Beach,
Irvine or San Juan Capistrano. For
information about these centers, visit
www.oclandfills.com.

Please do not mix your oil with other
substances!
The Ocean Begins at Your Front Door
DTP113 Rev 8/03
printed on recycled paper 2465
Used Oil Collection Centers
This information was provided by the County of Orange Integrated Waste Management Department and the California Integrated Waste Management Board (CIWMB).

Balboa
Hill’s Boat Service
814 E Bay Ave., Balboa, CA 92661
(949)675-0740( )
CIWMB#: 30-C-03538
Balboa Island
Island Marine Fuel
406 S Bay Front, Balboa Island, CA 92662
(949)673-1103( )
CIWMB#: 30-C-03728
Corona Del Mar
Corona Del Mar 76
2201 E. Pacific Coast Hwy., Corona Del Mar, CA 92625
(949)673-3320( )
CIWMB#: 30-C-06620
Corona Del Mar Chevron
2546 E. Coast Hwy., Corona Del Mar, CA 92625
(949)495-0774(14)
CIWMB#: 30-C-06424
Mobil (Harbor View)
2500 San Joaquin Hills Rd., Corona Del Mar, CA 92625
(949)640-4759( )
CIWMB#: 30-C-03363
Costa Mesa
AutoZone #5520
744 W. 19th St., Costa Mesa, CA 92627
(901)495-7159( )
CIWMB#: 30-C-05992
Big O Tires #5571
3181 Harbor Blvd., Costa Mesa, CA 92626
(949)443-4155( )
CIWMB#: 30-C-04676
Big O Tires #694
322 E. 17th St., Costa Mesa, CA 92627
(949)642-4131( )
CIWMB#: 30-C-05811
Coast General Performance
2855 Harbor Blvd., Costa Mesa, CA 92626
(714)540-5710( )
CIWMB#: 30-C-05916
Connell Chevrolet
2828 Harbor Blvd., Costa Mesa, CA 92626
(714)546-1200( )
CIWMB#: 30-C-06286
EZ Lube Inc #15
3599 Harbor Blvd., Costa Mesa, CA 92626
(714)966-1647( )
CIWMB#: 30-C-03137
EZ Lube Inc #46
400 E 17th St., Costa Mesa, CA 92627
(714)556-1312( )
CIWMB#: 30-C-05779
EZ Lube Inc. #44
2248 Harbor Blvd., Costa Mesa, CA 92627
(714)556-1312( )
CIWMB#: 30-C-05737
Firestone Store #71T7
475 E 17th St., Costa Mesa, CA 92627
(949)646-2444( )
CIWMB#: 30-C-02120
Jiffy Lube #1969
300 E 17th St., Costa Mesa, CA 92627
(949)548-2505( )
CIWMB#: 30-C-05553
Jiffy Lube #1970
2175 Newport Blvd., Costa Mesa, CA 92627
(949)548-4150( )
CIWMB#: 30-C-05554
Jiffy Lube #607
2255 Fairview Rd., Costa Mesa, CA 92627
(949)650-5823( )
CIWMB#: 30-C-05551
Jiffy Lube #861
375 Bristol St., Costa Mesa, CA 92626
(714)557-5823( )
CIWMB#: 30-C-05552
Kragen Auto Parts #0725
1739 Superior Ave., Costa Mesa, CA 92627
(949)642-3384( )
CIWMB#: 30-C-02624
Kragen Auto Parts #0796
1175 Baker Blvd., Unit E, Costa Mesa, CA 92626
(714)662-2005( )
CIWMB#: 30-C-02664
Nabers Cadillac
2600 Harbor Blvd., Costa Mesa, CA 92626
(714)444-5200( )
CIWMB#: 30-C-05051
Oil Stop Inc.

Oil Stop Inc. Costa Mesa, CA 92626
(714)434-8350( )
CIWMB#: 30-C-06293
Pep Boys #660
2946 Bristol St., Costa Mesa, CA 92626
(714)549-1533( )
CIWMB#: 30-C-03416
Plaza Chevron Service Center
3048 Bristol Costa Mesa, CA 92626
(714)545-4257( )
CIWMB#: 30-C-01123
Scher Tire Inc #15 dba Goodyear Tire
1596 Newport Blvd., Costa Mesa, CA 92627
(949)548-9384( )
CIWMB#: 30-C-03034
Fountain Valley
Firestone Store #7147
17975 Magnolia Ave., Fountain Valley, CA 92708
(714)842-3341( )
CIWMB#: 30-C-01219
Golden Shell
8520 Warner Ave., Fountain Valley, CA 92708
(714)842-7150( )
CIWMB#: 30-P-05002
Kragen Auto Parts #0734
9880 Warner Ave., Fountain Valley, CA 92708
(714)964-6427( )
CIWMB#: 30-C-02609
Kragen Auto Parts #1505
16147 Harbor Blvd., Fountain Valley, CA 92708
(714)531-8525( )
CIWMB#: 30-C-04125
Oil Can Henry's
9525 Warner Ave., Fountain Valley, CA 92708
(714)473-7705( )
CIWMB#: 30-C-05843
Purrfect Auto Service #10
16780 Harbor Blvd., Fountain Valley, CA 92708
(714)839-3899( )
CIWMB#: 30-C-01380
Huntington Beach
AutoZone #5528
6800 Warner Ave., Huntington Beach, CA 92647
(714)891-8211( )
CIWMB#: 30-C-04777
Bella Terra Car Wash
16061 Beach Blvd., Huntington Beach, CA 92647
(714)847-4924( )
CIWMB#: 30-C-06195
Big O Tires #553
19411 Beach Blvd., Huntington Beach, CA 92648
(714)536-7571( )
CIWMB#: 30-C-00970
Econo Lube N' Tune #26
19961 Beach Blvd., Huntington Beach, CA 92648
(714)536-6519( )
CIWMB#: 30-C-06117
Expertec Automotive
7680 Talbert Ave Suite A& B, Huntington Beach, CA92648
(714)848-9222( )
CIWMB#: 30-C-05914
EZ Lube Inc #16
7361 Edinger Ave., Huntington Beach, CA 92647
(714)899-3600( )
CIWMB#: 30-C-03289
EZ Lube Inc. #79
9862 Adams St., Huntington Beach, CA 92647
(714)556-1312( )
CIWMB#: 30-C-06547
Firestone Store #71T5
16171 Beach Blvd., Huntington Beach, CA 92647
(714)847-6081( )
CIWMB#: 30-C-02118
Huntington Beach Car Wash
18971 Beach Blvd., Huntington Beach, CA 92648
(714)847-4924( )
CIWMB#: 30-C-05303
Jiffy Lube #1857
8971 Warner Ave., Huntington Beach, CA 92647
(714)596-7213( )
CIWMB#: 30-C-05053
Kragen Auto Parts #1468
10072 Adams Ave., Huntington Beach, CA 92646
(714)593-6156( )
CIWMB#: 30-C-04284
Kragen Auto Parts #1511
7171 Warner Ave., Huntington Beach, CA 92647
(714)842-4531( )
CIWMB#: 30-C-04129
Kragen Auto Parts #1633
18888 Beach Blvd., Huntington Beach, CA 92648
(714)965-2353( )
CIWMB#: 30-C-02645
Oilmax 10 Minute Lube/Wash
9862 Adams Ave., Huntington Beach, CA 92646
(714)964-7110( )
CIWMB#: 30-C-03219
Pep Boys #799
19122 Brookhurst St., Huntington Beach, CA 92646
(714)964-0777( )
CIWMB#: 30-C-03439
Quik Change Lube & Oil
5841 Warner Ave., Huntington Beach, CA 92649
(714)840-2331( )
CIWMB#: 30-C-03208
R Kids Tire and Service #6
5062 Warner Ave., Huntington Beach, CA 92647
(714)846-1189( )
CIWMB#: 30-C-05691
Saturn of Huntington Beach
18801 Beach Blvd., Huntington Beach, CA 92648
(714)841-5428( )
CIWMB#: 30-C-05221
USA Express Tire & Service Inc
7232 Edinger Ave., Huntington Beach, CA 92647
(714)842-0717( )
CIWMB#: 30-C-04429
Zito's Auto Care
19002 Magnolia St., Huntington Beach, CA 92646
(714)968-8788( )
CIWMB#: 30-C-03251
Irvine
Firestone Store #71W4
51 Auto Center Dr., Irvine, CA 92618
(949)829-8710( )
CIWMB#: 30-C-03689
Irvine City Auto Parts
14427 Culver Dr., Irvine, CA 92604
(949)551-5588( )
CIWMB#: 30-C-02186
Jiffy Lube #1856 Irvine Spectrum
8777 Irvine Center Dr., Irvine, CA 92618
(949)753-0485( )
CIWMB#: 30-C-06094
Jiffy Lube #1988
3080 Main St., Irvine, CA 92614
(714)961-5491(27 )
CIWMB#: 30-C-04450
Kragen Auto Parts #4174
15315 Culver Dr., Ste.#170, Irvine, CA 92604
(602)631-7115( )
CIWMB#: 30-C-06417
Newport Beach
Jiffy Lube #2811
1520 W Coast Hwy., Newport Beach, CA 92663
(949)764-9255( )
CIWMB#: 30-C-05629
Newport Landing Fuel Dock
503 E Edgewater Newport Beach, CA 92661
(949)673-7878( )
CIWMB#: 30-C-03628
Orange
AutoZone #5942
1330 N. Glassell Orange, CA 92867
(714)538-4551( )
CIWMB#: 30-C-04553
Big O Tires #570
1825 E Katella Ave., Orange, CA 92867
(714)538-0016( )
CIWMB#: 30-C-00974
David Wilsons Ford of Orange
1350 W Katella Ave., Orange, CA 92867
(714)633-6731( )
CIWMB#: 30-C-02341
EZ Lube #74
3232 Chapman Ave. #E, Orange, CA 92869
(714)556-1312(106)
CIWMB#: 30-C-06627
Firestone Store #7185
1690 N Tustin Ave., Orange, CA 92867
(714)282-8144( )
CIWMB#: 30-C-0122
Jiffy Lube #1457
433 W. Katella Ave., Orange, CA 92867
(714)720-5757( )
CIWMB#: 30-C-06280
Kragen Auto Parts #1764
910 Tustin St., Orange, CA 92867
(714)771-3000( )
CIWMB#: 30-C-02625
Managed Mobile, Inc.
1030 N Batavia St., #B, Orange, CA 92867
(714)400-0250( )
CIWMB#: 30-C-05776
Pep Boys #806
215 E Katella Ave., Orange, CA 92867
(714)997-1540( )
CIWMB#: 30-C-01759
Santiago Hills Car Care
8544 East Chapman Ave., Orange, CA 92869
(714)919-1060( )
CIWMB#: 30-C-05622
Scher Tire #33
1821 E. Katella Ave., Orange, CA 92867
(909)343-3100( )
CIWMB#: 30-C-06324
Tabassi Shell Service Station
830 E Katella Ave., Orange, CA 92867
(714)771-6990( )
CIWMB#: 30-C-00552
The Tune-up Center
193 S Main St., Orange, CA 92868
(714)633-1876( )
CIWMB#: 30-C-02091
Tony's Fuel and Towing
1650 W La Veta Ave., Orange, CA 92868
(714)953-7676( )
CIWMB#: 30-C-00868
Truck Lubrication Company
143 S. Pixley Orange, CA 92868
(714)997-7730( )
CIWMB#: 30-C-06001
Santa Ana
All Phase Environmental
910 E. Fourth St., Santa Ana, CA 92701
(714)731-5995( )
CIWMB#: 30-C-06116
Archie's Tire & Towing
4518 Westminster Ave., Santa Ana, CA 92703
(714)636-4518( )
CIWMB#: 30-C-02058
AutoZone #3320
2007 S. Main St., Santa Ana, CA 92707
(901)495-7217( )
CIWMB#: 30-C-06508
AutoZone #5232
430 W 17th Santa Ana, CA 92706
(714)547-7003( )
CIWMB#: 30-C-04609
AutoZone #5538
1101 S Bristol Santa Ana, CA 92704
(714)241-0335( )
CIWMB#: 30-C-00829
Big O Tires
1211 W. Warner Ave., Santa Ana, CA 92707
(714)540-8646( )
CIWMB#: 30-C-04679
Big O Tires #712
1302 E. 17th St., Santa Ana, CA 92705
(714)541-6811( )
CIWMB#: 30-C-05813
Firestone Store #7175
3733 S Bristol Santa Ana, CA 92704
(714)549-4015( )
CIWMB#: 30-C-01223
Firestone Store #71TA
101 S Main St., Santa Ana, CA 92701
(714)542-8857( )
CIWMB#: 30-C-02123
Firestone Store #71W6
2005 N Tustin Ave., Ste A, Santa Ana, CA 92705
(714)541-7977( )
CIWMB#: 30-C-03688
Guaranty Chevrolet Motors Inc.
711 E 17th St., Santa Ana, CA 92701
(714)973-1711(277 )
CIWMB#: 30-C-06506
Jiffy Lube #1303
2025 N. Tustin Santa Ana, CA 92701
(714)720-5757( )
CIWMB#: 30-C-06283
John's Mobil
1465 S Main St., Santa Ana, CA 92707
(714)835-3266( )
CIWMB#: 30-C-00578
Kragen Auto Parts #0736
1302 E 17th St., Santa Ana, CA 92705
(714)953-6061( )
CIWMB#: 30-C-02610
Kragen Auto Parts #1253
1400 W Edinger Ave., Santa Ana, CA 92704
(714)754-1432( )
CIWMB#: 30-C-02627
Kragen Auto Parts #1376
521 W 17th St., Santa Ana, CA 92706
(714)543-4492( )
CIWMB#: 30-C-03901
Kragen Auto Parts #1516
2337 S Bristol Ave., Santa Ana, CA 92704
(714)557-0787( )
CIWMB#: 30-C-04106
Kragen Auto Parts #1648
1015 S Main St., Santa Ana, CA 92701
(714)568-1570( )
CIWMB#: 30-C-05664
Pep Boys #609
120 E 1st St., Santa Ana, CA 92701
(714)547-7477( )
CIWMB#: 30-C-01738
Pep Boys #802
1107 S Harbor Blvd., Santa Ana, CA 92704
(714)775-0828( )
CIWMB#: 30-C-01739
Purrfect Auto Service
2519 S Main St., Santa Ana, CA 92707
(714)549-7900( )
CIWMB#: 30-C-02085
Saturn of Santa Ana
1350 Auto Mall Dr., Santa Ana, CA 92705
(714)648-2444( )
CIWMB#: 30-C-05222
Scher Tire #28
1805 N Grand Ave., Santa Ana, CA 92705
(714)558-8644( )
CIWMB#: 30-C-03225
Tustin
Big O Tires #555
131 E 1st St., Tustin, CA 92780
(714)544-9431( )
CIWMB#: 30-C-00972
EZ Lube #42
12972 Newport Ave., Tustin, CA 92780
(714)556-1312( )
CIWMB#: 30-C-06408
Jiffy Lube #1406
3087 Edinger Ave., Tustin, CA 92780
(949)651-8814( )
CIWMB#: 30-C-03778
Kragen Auto Parts #1533
502 B E 1st St., Tustin, CA 92780
(714)544-9249( )
CIWMB#: 30-C-04128
Scher Tire Inc #17 dba Goodyear Tire
14511 Redhill Ave., Tustin, CA 92780
(714)832-6011( )
CIWMB#: 30-C-03035
Villa Park
Phil’s Villa Park 76
17771 Santiago Blvd., Villa Park, CA 92861
(714)637-0854( )
CIWMB#: 30-C-06579
2466
Clean beaches and healthy
creeks, rivers, bays and
ocean are important
to Orange County. However,
many common activities such as
pest control can lead to water
pollution if you’re not careful.

Pesticide treatments must be
planned and applied properly
to ensure that pesticides do
not enter the street, gutter or
storm drain. Unlike water in
sanitary sewers (from sinks and
toilets), water in storm drains is
not treated before entering our
waterways.

You would never dump pesticides
into the ocean, so don’t let it
enter the storm drains. Pesticides
can cause significant damage
to our environment if used
improperly. If you are thinking
of using a pesticide to control a
pest, there are some important
things to consider.

For more information,
please call
University of California Cooperative
Extension Master Gardeners at
(714) 708-1646
or visit these Web sites:
www.uccemg.org
www.ipm.ucdavis.edu
For instructions on collecting a specimen
sample visit the Orange County
Agriculture Commissioner’s website at:
http://www.ocagcomm.com/ser_lab.asp
To report a spill, call the
Orange County 24-Hour
Water Pollution Problem
Reporting Hotline
at 1-877-89-SPILL (1-877-897-7455).

For emergencies, dial 911.

Information From:

Cheryl Wilen, Area IPM Advisor; Darren Haver,
Watershed Management Advisor; Mary
Louise Flint, IPM Education and Publication
Director; Pamela M. Geisel, Environmental
Horticulture Advisor; Carolyn L. Unruh,
University of California Cooperative
Extension staff writer. Photos courtesy of
the UC Statewide IPM Program and
Darren Haver.

Funding for this brochure has been provided in full
or in part through an agreement with the State Water
Resources Control Board (SWRCB) pursuant to the
Costa-Machado Water Act of 2000 (Prop. 13).

Help Prevent Ocean Pollution:

The Ocean Begins
at Your Front Door
Responsible
Pest Control
Printed on Recycled Paper 2467
Key Steps to Follow:

Step 1: Correctly identify the pest (insect,
weed, rodent, or disease) and verify that it is
actually causing the problem.

This is important
because beneficial
insects are often
mistaken for pests
and sprayed with
pesticides needlessly.

Consult with a
Certified Nursery
Professional at a local nursery or garden center
or send a sample of the pest to the Orange
County Agricultural Commissioner’s Office.

Determine if the pest is still present – even
though you see damage, the pest may have left.

Step 2: Determine
how many pests are
present and causing
damage.

Small pest populations
may be controlled
more safely using nonpesticide techniques. These include removing food sources, washing off leaves with a strong
stream of water, blocking entry into the home
using caulking and replacing problem plants
with ones less susceptible to pests.

Step 3: If a pesticide must be used, choose
the least toxic chemical.

Obtain information on the least toxic pesticides
that are effective at controlling the target
pest from the UC Statewide Integrated Pest
Management (IPM) Program’s Web site at
www.ipm.ucdavis.edu.

Seek out the assistance of a Certified Nursery
Professional at a local nursery or garden center
when selecting a pesticide. Purchase the
smallest amount of pesticide available.

Apply the pesticide to the pest during its most
vulnerable life stage. This information can be
found on the pesticide label.

Step 4: Wear appropriate protective clothing.

Follow pesticide labels regarding specific types
of protective equipment you should wear.

Protective clothing should always be washed
separately from other clothing.

Step 5: Continuously monitor external
conditions when applying pesticides such as
weather, irrigation, and the presence of children
and animals.

Never apply pesticides when rain is predicted
within the next 48 hours. Also, do not water
after applying pesticides unless the directions say
it is necessary.

Apply pesticides when the air is still; breezy
conditions may cause the spray or dust to drift
away from your targeted area.

In case of an emergency call 911 and/or the
regional poison control number at
(714) 634-5988 or (800) 544-4404 (CA only).

For general questions you may also visit
www.calpoison.org.

Step 6: In the event of accidental spills,
sweep up or use an absorbent agent to remove
any excess pesticides. Avoid the use of water.

Be prepared. Have a broom, dust pan, or dry
absorbent material, such as cat litter, newspapers
or paper towels, ready to assist in cleaning up
spills.

Contain and clean up the spill right away. Place
contaminated materials in a doubled plastic bag.

All materials used to clean up the spill should
be properly disposed of according to your local
Household Hazardous Waste Disposal site.

Step 7: Properly store and dispose of unused
pesticides.

Purchase Ready-ToUse (RTU) products
to avoid storing
large concentrated
quantities of
pesticides.

Store unused chemicals in a locked cabinet.

Unused pesticide chemicals may be disposed
of at a Household Hazardous Waste Collection
Center.

Empty pesticide containers should be triple
rinsed prior to disposing of them in the trash.

Household Hazardous Waste
Collection Center
(714) 834-6752
www.oclandfills.com
Integrated Pest Management (IPM)
usually combines several least toxic pest
control methods for long-term prevention
and management of pest problems
without harming you, your family,
or the environment.

Three life stages of the common lady
beetle, a beneficial insect.

Tips for Pest Control
2468
Sewage Spill
Regulatory Requirements
This brochure was designed courtesy of the Orange County Sanitation District (OCSD).

For additional information, call (714) 962-2411, or visit their website at www.ocsd.com Your Responsibilities
as a Private Property Owner
Reference Guide
Sewage Spill
Allowing sewage to discharge to a gutter or storm
drain may subject you to penalties and/or out-ofpocket costs to reimburse cities or public agencies for clean-up efforts.

Here are the pertinent codes, fines, and agency
contact information that apply.

Orange County Stormwater Program
24 Hour Water Pollution Reporting Hotline
1-877-89-SPILL (1-877-897-7455)
! County and city water quality ordinances prohibit discharges containing pollutants.

California Health and Safety Code, Sections 5410-5416
! No person shall discharge raw or treated sewage or other waste in a manner that results in contamination, pollution or a nuisance. ! Any person who causes or permits a sewage discharge to any state waters:
• must immediately notify the local health agency of the discharge. • shall reimburse the local health agency for services that protect the public’s health and safety (water-contact receiving waters). • who fails to provide the required notice to the local health agency is guilty of a misdemeanor and shall be punished by a fine (between $500–$1,000) and/or imprisonment for less than one year. ! Requires the prevention, mitigation, response to and reporting of sewage spills.

California Water Code, Article 4, Chapter 4, Sections 13268-13271 California Code of Regulations, Title 23, Division 3, Chapter 9.2, Article 2, Sections 2250-2260
! Any person who causes or permits sewage in excess of 1,000 gallons to be discharged to state waters shall immediately notify the Office of Emergency Services.
! Any person who fails to provide the notice required by this section is guilty of a misdemeanor and shall be punished by a fine (less than $20,000) and/or imprisonment for not more than one year.

Orange County Health Care Agency
Environmental Health
(714) 433-6419
Regional Water Quality Control Board
Santa Ana Region San Diego Region
(951) 782-4130 (858) 467-2952
California Office of Emergency Services
(800) 852-7550
What is a
Sewage Spill?
You Are Responsible for a
Sewage Spill Caused by a Blockage
or Break in Your Sewer Lines!
Grease builds up inside and eventually blocks
sewer pipes. Grease gets into the sewer from food
establishments, household drains, as well as from poorly maintained commercial grease traps and interceptors.

Structure problems caused by tree roots in the lines,
broken/cracked pipes, missing or broken cleanout caps
or undersized sewers can cause blockages.

Infiltration and inflow (I/I) impacts pipe capacity and is caused when groundwater or rainwater enters the
sewer system through pipe defects and illegal
connections.

Time is of the essence in dealing with sewage spills. You are required to immediately:

Control and minimize the spill. Keep spills contained
on private property and out of gutters, storm drains and public waterways by shutting off or not using the water.

Use sandbags, dirt and/or plastic sheeting to
prevent sewage from entering the storm drain system.

Clear the sewer blockage. Always wear gloves and
wash your hands. It is recommended that a plumbing
professional be called for clearing blockages and making necessary repairs.

Always notify your city sewer/public works
department or public sewer district of sewage
spills. If the spill enters the storm drains also notify the Health Care Agency. In addition, if it exceeds 1,000
gallons notify the Office of Emergency Services. Refer to the numbers listed in this brochure.

Caution
Allowing sewage from your home, business or property
to discharge to a gutter or storm drain may subject you to penalties and/or out-of-pocket costs to reimburse cities or public agencies for clean-up and enforcement efforts.

See Regulatory Codes & Fines section for pertinent codes and fines that apply.

What to Look For
You Could Be Liable
Sewage spills can be a very noticeable gushing of water from a manhole or a slow water leak that may take time to be noticed. Don’t dismiss unaccounted-for wet areas.

Look for:
! Drain backups inside the building.
! Wet ground and water leaking around manhole lids
onto your street.
! Leaking water from cleanouts or outside drains.
! Unusual odorous wet areas: sidewalks, external
walls or ground/landscape around a building.

Rev 4/06
printed on recycled paper
Common Causes
of Sewage Spills
Overflowing
cleanout pipe
located on
private property
Keep people and pets away from the affected area.

Untreated sewage has high levels of disease-causing
viruses and bacteria. Call your local health care agency listed on the back for more information.

DTP113
Sewage spills occur when the wastewater being
transported via underground pipes overflows through
a manhole, cleanout or broken pipe. Sewage spills can
cause health hazards, damage to homes and businesses,
and threaten the environment, local waterways and
beaches.

Health Care Agency
Environmental Health
CA
IA
LIFORN

Y OF OR
TA
NN
U
G
O
E
C
If You See a Sewage Spill Occurring,
Notify Your City Sewer/Public Works
Department or Public Sewer District
IMMEDIATELY!
www.ocwatersheds.com

P R O J E C T

P R E V E N T I O N
Residences
Businesses
Homeowner/Condominium Associations
Federal and State Complexes
Military Facilities
Orange County
Sanitation District
2469
How a Sewer
System Works
Orange County
Agency Responsibilites
You Could Be Liable
for Not Protecting
the Environment
Local and state agencies have legal jurisdiction and enforcement authority to ensure that sewage spills are remedied.

They may respond and assist with containment, relieving pipe blockages, and/or clean-up of the sewage spill, especially if
the spill is flowing into storm drains or onto
public property.

A property owner may be charged for
costs incurred by these agencies
responding to spills from private
properties .

How You Can
Prevent Sewage Spills
A property owner's sewer pipes are called
service laterals and are connected to larger
local main and regional trunk lines. Service
laterals run from the connection at the
home to the connection with the public
sewer (including the area under the street).

These laterals are the responsibility of the
property owner and must be maintained
by the property owner. Many city agencies
have adopted ordinances requiring
maintenance of service laterals. Check with
your city sewer/local public works
department for more information.

Operation and maintenance of local and
regional sewer lines are the responsibility of the city sewer/public works departments and public sewer districts.

Preventing
Grease Blockages
The drain is not a dump! Recycle or dispose of grease
properly and never pour grease down the drain.

Homeowners should mix fats, oils and grease with absorbent waste materials such as paper, coffee grounds, or kitty litter and place it in the trash. Wipe food scraps from plates and pans and dump them in the trash.

Restaurants and commercial food service establishments
should always use “Kitchen Best Management Practices.”
These include:
! Collecting all cooking grease and liquid oil from pots, pans and fryers in covered grease containers for recycling.
! Scraping or dry-wiping excess food and grease from
dishes, pots, pans and fryers into the trash.
! Installing drain screens on all kitchen drains.
! Having spill kits readily available for cleaning up spills. ! Properly maintaining grease traps or interceptors by having them serviced regularly. Check your local city codes.
! City Sewer/Public Works Departments—
Responsible for protecting city property
and streets, the local storm drain system, sewage
collection system and other public areas.
! Public Sewer /Sani tat ion Dist r ict—
Responsible for collecting, treating and disposing
of wastewater.
! County of Orange Health Care Agency—
Responsible for protecting public health by closing
ocean/bay waters and may close food-service
businesses if a spill poses a threat to public health.
! Regional Water Quality Control Boards—
Responsible for protecting State waters.
! Orange County Stormwater Program—
Responsible for preventing harmful pollutants from
being discharged or washed by stormwater runoff
into the municipal storm drain system, creeks, bays
and the ocean.
2 3
1 Never put grease down garbage
disposals, drains or toilets.

Perform periodic cleaning to
eliminate grease, debris and roots in
your service laterals.

Repair any structural problems
in your sewer system and eliminate
any rainwater infiltration/inflow
leaks into your service laterals.

Sewage spills can cause
damage to the environment.

Help prevent them!
Regional
Trunk line
Sewer
Wastewater
Treatment
Plant
Cleanout
Cleanout Grease
Trap
Downspout
(rain water goes into
the storm drain system,
not the sewer)

RESIDENCE

BUSINESS
Manhole
Local Main
Sewer Line
Private
Service
Laterals
Manhole
City Sewer/Public Works Departments
Aliso Viejo . . . . . . . . . . . . . . . . . . . . . . . . . (949) 425-2500 Anaheim. . . . . . . . . . . . . . . . . . . . . . . . . . . (714) 765-6860 Brea . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (714) 990-7691 Buena Park . . . . . . . . . . . . . . . . . . . . . . . . (714) 562-3655 Costa Mesa . . . . . . . . . . . . . . . . . . . . . . . . (949) 645-8400 Cypress . . . . . . . . . . . . . . . . . . . . . . . . . . . (714) 229-6760 Dana Point . . . . . . . . . . . . . . . . . . . . . . . . . (949) 248-3562 Fountain Valley . . . . . . . . . . . . . . . . . . . . . (714) 593-4600 Fullerton. . . . . . . . . . . . . . . . . . . . . . . . . . . (714) 738-6897 Garden Grove. . . . . . . . . . . . . . . . . . . . . . . (714) 741-5375 Huntington Beach . . . . . . . . . . . . . . . . . . . (714) 536-5921 Irvine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (949) 453-5300 Laguna Beach . . . . . . . . . . . . . . . . . . . . . . (949) 497-0765 Laguna Hills . . . . . . . . . . . . . . . . . . . . . . . . (949) 707-2650 Laguna Niguel . . . . . . . . . . . . . . . . . . . . . . (949) 362-4337 Laguna Woods . . . . . . . . . . . . . . . . . . . . . . (949) 639-0500 La Habra. . . . . . . . . . . . . . . . . . . . . . . . . . . (562) 905-9792 Lake Forest . . . . . . . . . . . . . . . . . . . . (949) 461-3480 La Palma . . . . . . . . . . . . . . . . . . . . . . . . . . (714) 690-3310 Los Alamitos . . . . . . . . . . . . . . . . . . . . . . . (562) 431-3538 Mission Viejo. . . . . . . . . . . . . . . . . . . . . . . (949) 831-2500 Newport Beach . . . . . . . . . . . . . . . . . . . . . (949) 644-3011 Orange . . . . . . . . . . . . . . . . . . . . . . . . . . . . (714) 532-6480 Orange County . . . . . . . . . . . . . . . . . . . . . . (714) 567-6363 Placentia . . . . . . . . . . . . . . . . . . . . . . . . . . (714) 993-8245 Rancho Santa Margarita. . . . . . . . . . . . (949) 635-1800 San Clemente. . . . . . . . . . . . . . . . . . . . . . . (949) 366-1553 San Juan Capistrano . . . . . . . . . . . . . . . . (949) 443-6363 Santa Ana . . . . . . . . . . . . . . . . . . . . . . . . . (714) 647-3380 Seal Beach. . . . . . . . . . . . . . . . . . . . . . . . . (562) 431-2527 Stanton . . . . . . . . . . . . . . . . . . . . . . . . . . . (714) 379-9222 Tustin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (714) 962-2411 Villa Park . . . . . . . . . . . . . . . . . . . . . . . . . . (714) 998-1500 Westminster . . . . . . . . . . . . . . . . . . . . . . . (714) 893-3553 Yorba Linda . . . . . . . . . . . . . . . . . . . . . . . . (714) 961-7170 Public Sewer/Water Districts
Costa Mesa Sanitary District . . . . . . . . . . (714) 393-4433/ (949) 645-8400
El Toro Water District . . . . . . . . . . . . . . . . (949) 837-0660 Emerald Bay Service District . . . . . . . . . . (949) 494-8571 Garden Grove Sanitary District . . . . . . . . . (714) 741-5375 Irvine Ranch Water District . . . . . . . . . . . . (949) 453-5300 Los Alamitos/Rossmoor Sewer District . . . (562) 431-2223 Midway City Sanitary District (Westminster) (714) 893-3553 Moulton Niguel Water District . . . . . . . . . (949) 831-2500 Orange County Sanitation District. . . . . . . (714) 962-2411 Santa Margarita Water District . . . . . . . . (949) 459-6420 South Coast Water District . . . . . . . . . . . . (949) 499-4555 South Orange County Wastewater Authority (949) 234-5400 Sunset Beach Sanitary District. . . . . . . . . (562) 493-9932 Trabuco Canyon Sanitary District . . . . . . . (949) 858-0277 Yorba Linda Water District . . . . . . . . . . . . (714) 777-3018 Other Agencies
Orange County Health Care Agency . . . . . (714) 433-6419 Office of Emergency Services. . . . . . . . . . (800) 852-7550 Report Sewage Spills!
2470
For more information,
please call the
Orange County Stormwater Program
at 1-877-89-SPILL (1-877-897-7455)
or visit
www.ocwatersheds.com
UCCE Master Gardener Hotline:
(714) 708-1646
To report a spill,
call the
Orange County 24-Hour
Water Pollution Problem
Reporting Hotline
1-877-89-SPILL (1-877-897-7455)
.

For emergencies, dial 911.

The tips contained in this brochure provide useful
information to help prevent water pollution
while landscaping or gardening. If you have other
suggestions, please contact your city’s stormwater
representatives or call the Orange County
Stormwater Program.

C lean beaches
and healthy
creeks, rivers, bays
and ocean are important to
Orange County. However,
many common activities
can lead to water pollution
if you’re not careful.

Fertilizers, pesticides and
other chemicals that are left
on yards or driveways can
be blown or washed into
storm drains that flow to the
ocean. Overwatering lawns
can also send materials into
storm drains. Unlike water
in sanitary sewers (from sinks
and toilets), water in storm
drains is not treated before
entering our waterways.

You would never pour
gardening products into the
ocean, so don’t let them enter
the storm drains. Follow
these easy tips to help prevent
water pollution.

Printed on Recycled Paper 2471
Tips for Landscape and Gardening Tips for Landscape & Gardening Never allow gardening products or
polluted water to enter the street, gutter
or storm drain.

General Landscaping Tips
Protect stockpiles and materials from
wind and rain by storing them under
tarps or secured plastic sheeting.

Prevent erosion of slopes by planting
fast-growing, dense ground covering
plants. These will shield and bind the
soil.

Plant native vegetation
to reduce the amount
of water, fertilizers, and
pesticide applied to the
landscape.

Never apply pesticides
or fertilizers when rain is
predicted within the next 48 hours.

Garden & Lawn Maintenance
Do not overwater. Use irrigation
practices such as drip irrigation,
soaker hoses or micro spray systems.

Periodically inspect and fix leaks and
misdirected sprinklers.

Do not rake or blow
leaves, clippings or
pruning waste into
the street, gutter
or storm drain.

Instead, dispose
of green waste by
composting, hauling
it to a permitted
landfill, or recycling it through your
city’s program.

Use slow-release fertilizers to
minimize leaching, and use organic
fertilizers.

Read labels and use only as directed.

Do not over-apply pesticides or
fertilizers. Apply to spots as needed,
rather than blanketing an entire
area.

Store pesticides, fertilizers and other
chemicals in a dry covered area to
prevent exposure that may result
in the deterioration
of containers and
packaging.

Rinse empty
pesticide containers
and re-use rinse water
as you would use the
product. Do not dump rinse water
down storm drains. Dispose of empty
containers in the trash.

When available, use non-toxic
alternatives to traditional pesticides,
and use pesticides specifically
designed to control the pest you are
targeting. For more information, visit
www.ipm.ucdavis.edu.

If fertilizer is spilled, sweep up the
spill before irrigating. If the spill is
liquid, apply an absorbent material
such as cat litter, and then sweep it up
and dispose of it in the trash.

Take unwanted pesticides to a
Household Hazardous Waste
Collection Center to be recycled.

Locations are provided below.

Household Hazardous Waste
Collection Centers
Anaheim: 1071 N. Blue Gum St.

Huntington Beach: 17121 Nichols St.

Irvine: 6411 Oak Canyon
San Juan Capistrano: 32250 La Pata Ave.

For more information, call (714) 834-6752
or visit www.oclandfills.com
2472
2473
2474
Help Prevent Ocean Pollution:

For more information,
please call the
Orange County Stormwater Program
at 1-877-89-SPILL (1-877-897-7455)
or visit
www.ocwatersheds.com
To report a spill,
call the
Orange County 24-Hour
Water Pollution Problem
Reporting Hotline
at 1-877-89-SPILL (1-877-897-7455).

For emergencies, dial 911.

The tips contained in this brochure provide useful
information to help prevent water pollution. If
you have other suggestions, please contact your
city’s stormwater representatives or call the Orange
County Stormwater Program.

Printed on Recycled Paper
Tips for Residential
Pool, Landscape and
Hardscape Drains
2475
Pool Maintenance
All pool water discharged to the curb, gutter or
permitted pool drain from your property must meet the
following water quality criteria:

The residual chlorine does not exceed

0.1 mg/L (parts per
million).

The pH is between

6.5 and 8.5.

The water is free
of any unusual
coloration.

There is no discharge
of filter media or acid
cleaning wastes.

Some cities have ordinances that do not allow pool
water to be discharged to the storm drain. Check with
your city.

Landscape and
Hardscape Drains
The following recommendations will help reduce or
prevent pollutants from your landscape and hardscape
drains from entering the street, gutter or storm drain.

Unlike water that enters the sewer (from sinks and
toilets), water that enters a landscape or hardscape
drain is not treated before entering our creeks, rivers, bays and ocean.

Household Activities
Do not rinse spills of materials or chemicals to any
drain.

Use dry cleanup methods such as applying cat
litter or another absorbent material, then sweep it
up and dispose of it in the trash. If the material is
hazardous, dispose of it at a Household Hazardous
Waste Collection Center (HHWCC). For locations,
call (714) 834-6752 or visit www.oclandfills.com.

Do not hose down your driveways, sidewalks or
patios to your landscape or hardscape drain.

Sweep up debris and dispose of it in the trash.

Always pick up after your pet. Flush waste down
the toilet or dispose of it in the trash.

Tips for Residential Pool, Landscape and Hardscape Drains Do not store items such as cleaners, batteries,
automotive fluids, paint products, TVs, or
computer monitors uncovered outdoors. Take
them to a HHWCC for disposal.

Yard Maintenance
Do not overwater. Water by hand or set
automated irrigation systems to reflect seasonal
water needs.

Follow directions on
pesticides and fertilizers
(measure, do not estimate
amounts) and do not use
if rain is predicted within
48 hours.

Cultivate your garden
often to control weeds
and reduce the need to
use chemicals.

Vehicle Maintenance
Never pour oil or antifreeze down your
landscape or hardscape drain. Recycle these
substances at a service station, a waste collection
center or used oil recycling center. For
locations, contact the Used Oil Program at 1-800-
CLEANUP or visit www.CLEANUP.org.

Whenever possible, take your vehicle to a
commercial car wash.

If you do wash your vehicle at home, do not
allow the washwater to go down your landscape
or hardscape drain. Instead, dispose of it in
the sanitary sewer (a sink or toilet) or onto an
absorbent surface such as your lawn.

Use a spray nozzle that will shut off the water
when not in use.
2476
Clean beaches and
healthy creeks,
rivers, bays and
ocean are important to Orange
County. However, if we are not
careful, our daily activities can
lead directly to water pollution
problems. Water that drains
through your watershed can pick
up pollutants which are then
transported to our waterways and
beautiful ocean.

You can prevent water pollution
by taking personal action and by
working with members of your
watershed community to prevent
urban runoff from entering your
waterway.

For more information,
please call the
Orange County Stormwater Program
at 1.877.89.SPILL
or visit
www.ocwatersheds.com
To report a spill,
call the
Orange County 24-Hour
Water Pollution Problem
Reporting Hotline
at 1.877.89.SPILL.

For emergencies, dial 911.

The tips contained in this brochure provide useful
information to help protect your watershed. If you
have other suggestions, please contact your city’s
stormwater representatives or call the Orange
County Stormwater Program.

Help Prevent Ocean Pollution:

The Ocean Begins
at Your Front Door
Tips For Protecting
Your Watershed

WHAT STARTS HERE

COULD TRAVEL HERE

AND ENDS UP HERE

WHICH FLOWS

THROUGH HERE
Printed on Recycled Paper 2477
My Watershed. Our Ocean.

Water + shed, noun: A region of land within
which water flows down into a specified water body,
such as a river, lake, sea, or ocean; a drainage basin
or catchment basin.

Orange County is comprised of 11 major
watersheds into which most of our water flows,
connecting all of Orange County to the Pacific
Ocean.

As water from
rain (stormwater)
or sprinklers and
hoses (urban
runoff) runs down
your driveway
and into your
neighborhood
streets, sidewalks
and gutters, it flows into storm drains that
lead to waterways within your watershed. The
waterways from other cities merge as they
make their way through our watersheds until
all the runoff water in Orange County meets
at the Pacific Ocean. The water that reaches
our ocean is not pure. As it flows through the
watershed, it picks up pollutants such as litter,
cigarette butts, fertilizer, pesticides, pet waste,
motor oil and lawn clippings. Unlike water
that enters the sewer (from sinks and toilets),
water that enters the storm drain is not treated
before it flows, ultimately, to the ocean.

Water quality can
be improved by
“Adopting Your
Watershed.”
Through this
effort, we are
challenging
citizens and
organizations to join the Orange County
Stormwater Program and others who are
working to protect and restore our creeks,
rivers, bays and ocean.

There are many opportunities to get involved:
• Appreciate your watershed - explore
the creeks, trails and ocean and make
observations about its conditions. If you see
anything abnormal (such as dead fish, oil
spills, leaking barrels, and other pollution)
contact the Orange County 24-hour water
pollution problem reporting hotline at

1.877.89.SPILL to report the problem.
• Research your watershed. Learn
about what watershed you live in by
visiting www.ocwatersheds.com.
• Find a watershed organization
in your community and
volunteer to help. If there
are no active groups,
consider starting your
own.
• Visit EPA’s Adopt Your
Watershed’s Catalog of
Watershed Groups at
www.epa.gov/adopt to
locate groups in your
community.
• Organize or join in
a creek, river, bay or
ocean cleanup event
such as Coastal & Inner
Coastal Cleanup Day
that takes place the
3rd Saturday of every
September. For more
information visit
www.coast4u.org.

Follow these simple tips to protect the water
quality of your watershed:
• Sweep up debris and dispose of it in the trash. Do not hose down driveways or sidewalks into the street or
gutter.
• Use dry cleanup methods such as cat litter to absorb
spills and sweep up residue.
• Set your irrigation systems to reflect seasonal water needs or use weather-based controllers. Inspect for
runoff regularly.
• Cover trashcans securely.
• Take hazardous waste to a household hazardous waste
collection center. (For example, paint, batteries and
petroleum products)
• Pick up after your pet.
• Follow application and disposal directions for
pesticides and fertilizers.
• If you wash your car at home, wash it on your lawn
or divert the runoff onto a landscaped
area. Consider taking your car to a
commercial car wash, where the
water is reclaimed or recycled.
• Keep your car well
maintained.
• Never pour oil or
antifreeze in the
street, gutter or
storm drain.

P A C I F I C O C E A N
5 405
605
5 5
39 73
55 74
22 22
241
133
133
57 90
91 91
39 1
1 57
261
73 241
1 90
1 55
91 241
1 Brea
Tustin
Orange
Villa Park
Stanton
Cypress
Anaheim
Rossmoor
La Palma
La Habra
Santa Ana
Fullerton Placentia
Seal Beach
Dana Point
Costa Mesa
Buena Park
Yorba Linda
Westminster
Lake Forest
Aliso Viejo
San Clemente
Los Alamitos
Laguna Woods
Laguna Hills
Laguna Beach
Garden Grove
Coto de Caza
Newport Beach
Mission Viejo
Laguna Niguel
Foothill Ranch
Fountain Valley
Tustin Foothills
Huntington Beach
San Juan Capistrano
Rancho Santa Margarita
Irvine
Santa Ana River
Newport Bay
San Juan Creek
San Gabriel - Coyote Creek
Anaheim Bay - Huntington Harbour
San Mateo Creek
San Clemente
Coastal Streams
Laguna
Coastal
Streams
Dana Point Coastal Streams
Elsinore Valley
Middle
Santa Ana
River
Lake
Mathews
Lake
Mathews
Santa Ana River
Newport Bay
San Juan Creek
San Gabriel - Coyote Creek
Anaheim Bay - Huntington Harbour
San Mateo Creek
San Clemente
Coastal Streams
Dana Point Coastal Streams
Elsinore Valley
Middle
Santa Ana
River
Lake
Mathews
Lake
Mathews
Tips for Protecting
Your Watershed
2478
Ayude a prevenir
la contaminación del océano
For more information,
please call the
Orange County Stormwater Program
at 1-877-89-SPILL (1-877-897-7455)
or visit
www.ocwatersheds.com
Report sewage spills and
discharges that are not
contained to your site to the
Orange County 24-Hour
Water Pollution Problem
Reporting Hotline
at 1-877-89-SPILL (1-877-897-7455)
For emergencies, dial 911.

Help Prevent Ocean Pollution:

Tips for the Food
C Service Industry
lean beaches
and healthy
creeks, rivers, bays
and ocean are important to
Orange County. Fats, oils
and grease from restaurants
and food service facilities
can cause sewer line
blockages that may result
in sewage overflow into
your facility and into storm
drains. Unlike water in
sanitary sewers (from sinks
and toilets), water in storm
drains is not treated before
entering our waterways
and should never contain
washwater, trash, grease or
other materials.

You would never dump oil
and trash into the ocean, so
don’t let it enter the storm
drains. Follow these tips to
help prevent water pollution.

The Ocean Begins
at Your Front Door
Printed on Recycled Paper 2479
Best Kitchen Practices
Food Waste Disposal
Scrape food waste off of plates,
utensils, pots, food preparation and
cooking areas and dispose of it in the
trash.

Never put food waste down the drain.

Food scraps often contain grease,
which can clog sewer pipes and result
in sewage backups and overflows.

Grease & Oil Disposal
Never put oil or grease down the
drain. Contain grease and oil
by using covered grease storage
containers or installing a grease
interceptor.

Never overfill your grease storage
container or transport it without a
cover.

Grease control
devices must
be emptied
and cleaned
by permitted
companies.

Keep
maintenance
records on site.

For a list of oil/grease recycling
companies, contact the CIWMB at www.
ciwmb.ca.gov/foodwaste/render.htm or
contact your local sanitation district.

Minor Spill Cleanup
Always use dry cleanup methods, such
as a rag, damp mop or broom.

Never hose a spill into the street, gutter
or storm drain.

Dumpster Cleanup
Pick up all
debris around
the dumpster.

Always keep
the lid on
the dumpster
closed.

Never pour liquids into the dumpster
or hose it out.

Floor Mat Cleaning
Sweep the floor mats
regularly, discarding
the debris into the
trash.

Hose off the mats
in a mop sink, at a
floor drain, or in an
outdoor area that can
contain the water.

Never hose the mats in an area where
the wastewater can flow to the street,
gutter or storm drain.

Washwater Disposal
Dispose of washwater in a mop sink or
an area with a floor drain.

Never dispose of
washwater in the street,
gutter or storm drain.

Major Spill Cleanup
Have spill containment and cleanup kits readily available, and train all employees on how to use them.

Immediately contain and clean the spill
using dry methods.

If the spill leaves your site, call (714)
567-6363.
2480
2481
2482
2483
2484
2485
2486
2487
2488

APPENDIX C

BMP DETAILS & CALCULATIONS
Worksheets include:

Infiltration Feasibility Worksheet
Worksheet H
Worksheet I
Worksheet J 2489
Worksheets from Orange County Technical Guidance Document (5-19-2011) See TGD for instructions and/or examples related to these worksheets www.ocwatersheds.com/WQMP.aspx
Table 2.7: Infiltration BMP Feasibility Worksheet (DMA 1) Infeasibility Criteria Yes No
1 Would Infiltration BMPs pose significant risk for
groundwater related concerns? Refer to Appendix VII
(Worksheet I) for guidance on groundwater-related
infiltration feasibility criteria.

X
Provide basis:

Summarize findings of studies provide reference to studies, calculations, maps, data sources, etc. Provide narrative discussion of study/data source applicability. 2 Would Infiltration BMPs pose significant risk of
increasing risk of geotechnical hazards that cannot
be mitigated to an acceptable level? (Yes if the
answer to any of the following questions is yes, as
established by a geotechnical expert):

The BMP can only be located less than 50 feet away
from slopes steeper than 15 percent
The BMP can only be located less than eight feet from
building foundations or an alternative setback.

A study prepared by a geotechnical professional or an
available watershed study substantiates that stormwater infiltration would potentially result in significantly
increased risks of geotechnical hazards that cannot be
mitigated to an acceptable level.

X
Provide basis:

Summarize findings of studies provide reference to studies, calculations, maps, data sources, etc. Provide narrative discussion of study/data source applicability. 3 Would infiltration of the DCV from drainage area violate downstream water rights?
X
Provide basis:

Summarize findings of studies provide reference to studies, calculations, maps, data sources, etc. Provide narrative discussion of study/data source applicability.

X
Becuase both buildings have sub-surface parking, the BMP would need to be located at or below the sub-surface pad elevation. This would put it in the clay layer of the existing soil which, per the percolation test results, has a very low infiltration rate. 2490 Worksheets from Orange County Technical Guidance Document (5-19-2011) See TGD for instructions and/or examples related to these worksheets www.ocwatersheds.com/WQMP.aspx
Table 2.7: Infiltration BMP Feasibility Worksheet (continued) Partial Infeasibility Criteria Yes No
4 Is proposed infiltration facility located on HSG D soils or the site geotechnical investigation identifies presence of soil characteristics which support categorization as D soils? X
Provide basis:

Summarize findings of studies provide reference to studies, calculations, maps, data sources, etc. Provide narrative discussion of study/data source applicability. 5 Is measured infiltration rate below proposed facility less than 0.3 inches per hour? This calculation shall be based on the methods described in Appendix VII.

X
Provide basis:

Summarize findings of studies provide reference to studies, calculations, maps, data sources, etc. Provide narrative discussion of study/data source applicability. 6 Would reduction of over predeveloped conditions cause impairments to downstream beneficial uses, such as
change of seasonality of ephemeral washes or
increased discharge of contaminated groundwater to
surface waters?
X
Provide citation to applicable study and summarize findings relative to the amount of infiltration that is permissible:

Summarize findings of studies provide reference to studies, calculations, maps, data sources, etc. Provide narrative discussion of study/data source applicability. 7 Would an increase in infiltration over predeveloped
conditions cause impairments to downstream
beneficial uses, such as change of seasonality of
ephemeral washes or increased discharge of
contaminated groundwater to surface waters?
X
Provide citation to applicable study and summarize findings relative to the amount of infiltration that is permissible:

Summarize findings of studies provide reference to studies, calculations, maps, data sources, etc. Provide narrative discussion of study/data source applicability.

X
Becuase both buildings have sub-surface parking, the BMP would need to be located at or below the sub-surface pad elevation. This would put it in the clay layer of the existing soil which, per the percolation test results, has a very low infiltration rate.
2491
Worksheets from Orange County Technical Guidance Document (5-19-2011) See TGD for instructions and/or examples related to these worksheets www.ocwatersheds.com/WQMP.aspx
Table 2.7: Infiltration BMP Feasibility Worksheet (continued) Infiltration Screening Results (check box corresponding to result):
8 Is there substantial evidence that infiltration from the project would result in a significant increase in I&I to the sanitary sewer that cannot be sufficiently mitigated? (See Appendix XVII)
Provide narrative discussion and supporting evidence:

Summarize findings of studies provide reference to studies, calculations, maps, data sources, etc. Provide narrative discussion of study/data source applicability.
9 If any answer from row 1-3 is yes: infiltration of any volume is not feasible within the DMA or equivalent.

Provide basis:

Summarize findings of infeasibility screening
10 If any answer from row 4-7 is yes, infiltration is permissible but is not presumed to be feasible for the entire DCV.

Criteria for designing biotreatment BMPs to achieve the maximum feasible infiltration and ET shall apply.

Provide basis:

Summarize findings of infeasibility screening
11 If all answers to rows 1 through 11 are no, infiltration of the full DCV is potentially feasible, BMPs must be designed to infiltrate the full DCV to the maximum extent practicable.

X
X
X
Becuase both buildings have sub-surface parking, the BMP would need to be located at or below the sub-surface pad elevation. This would put it in the clay layer of the existing soil which, per the percolation test results, has a very low infiltration rate.

Becuase both buildings have sub-surface parking, the BMP would need to be located at or below the sub-surface pad elevation. This would put it in the clay layer of the existing soil which, per the percolation test results, has a very low infiltration rate.
2492
Worksheets from Orange County Technical Guidance Document (5-19-2011) See TGD for instructions and/or examples related to these worksheets www.ocwatersheds.com/WQMP.aspx
Table VIII.1: Recommendations/Requirements for BMP Selection to Minimize Groundwater Quality Impacts
Tributary Area
Risk Category
Narrative Description
of Category
Example Land Use Activities BMP Selection
Requirements
Low Runoff
Contamination
Potential
BMP receives runoff
from a mix of land
covers that are
expected to have
relatively clean runoff;
significant spills in
tributary area are
unlikely.
▪ Rooftops with roofing material
and downspouts free of copper
and zinc
▪ Patios, sidewalks, and other
pedestrian areas
▪ Mixed residential land uses with
applicable source controls
▪ Institutional land uses with
applicable source controls
▪ Driveways and minor streets
▪ Any infiltration BMP
type may be used
▪ Pretreatment for
sediment is strongly
recommended, as
applicable, to mitigate
clogging
Moderate
Runoff
Contamination
Potential
BMP receives runoff
from a mix of land
covers, more than 10
percent of which have
the potential to generate
stormwater pollutants at
levels that could
potentially contaminate
groundwater; there is
potential for minor spills
in the tributary area.
▪ Roadways greater than 5,000
ADT but less than 25,000 ADT
▪ Commercial and institutional
parking lots
▪ Commercial land uses
▪ Light industrial that does not
include usage of chemicals that
▪ are mobile in stormwater and
groundwater
▪ Trash storage areas
▪ Any infiltration BMP
type may be used
▪ Pretreatment shall be
used
▪ The type of
pretreatment shall be
selected to address
potential groundwater
contaminants
potentially found in
stormwater runoff.

High Runoff
Contamination
Potential
BMP receives runoff
from a mix of land
covers, more than 10
percent of which have
significant unavoidable
potential to generate
stormwater pollutants in
quantities that could be
detrimental to
groundwater quality;
and/or there is
significant potential for
major spills that could
drain to BMPs.
▪ Roads greater than 25,000 ADT
▪ Heavy and light industrial
pollutant source areas, including
areas with exposed industrial
activity and high use industrial
truck traffic, and any areas that
cannot be isolated these areas.

Does not include lower risk
source sources areas within
industrial zones (e.g., roofs,
offices, and parking areas) that
are hydrologically isolated from
industrial pollutant source areas
▪ Automotive repair shops
▪ Car washes
▪ Fleet storage areas
▪ Nurseries, agriculture, and
heavily managed landscape
areas with extensive use of
fertilizer
▪ Fueling stations (infiltration
prohibited under all conditions)
Infiltration is prohibited
unless advanced
pretreatment and spill
isolation can be feasibly
used and enhanced
monitoring and
inspection are
implemented.

Large projects* must
evaluate feasibility of
advanced pretreatment
and spill isolation.

Small projects may
consider infiltration to be
infeasible with narrative
discussion
* See Table VII.2 for definition of “Large” and “Small” projects. 2493
Worksheets from Orange County Technical Guidance Document (5-19-2011) See TGD for instructions and/or examples related to these worksheets www.ocwatersheds.com/WQMP.aspx
Table VIII.2: Definition of Project Site Categories
Residential
Commercial,
Institutional Industrial
Small Projects Less than 10 acres
and less than 30 DU
Less than 5 acres and
less than 50,000 SF
Less than 2 acres and
less than 20,000 SF
Large Projects Greater than 10 acres
or greater than 30 DU
Greater than 5 acres or
greater than 50,000 SF
Greater than 2 acres or
greater than 20,000 SF
VIII.2. Depth to Groundwater and Mounding Potential
Minimum separation between the infiltrating surface (bottom of infiltration facility) and seasonally high mounded groundwater shall be observed in the design of infiltration BMPs, depending on BMP type.
• If the depth to unmounded seasonally high groundwater is greater than 15 feet, the depth to groundwater does not constrain infiltration
• If separation to unmounded seasonally high groundwater is greater than 10-feet and the infiltration area is less than 2,000 sq-ft, the depth to groundwater does not constrain infiltration.
• The separation between the infiltrating surface and the seasonally high mounded groundwater table shall not be less than 5 feet for all BMP types. BMPs for which 5-foot minimum separation applies include:
o Rain gardens and dispersion trenches (small, residential applications) o Bioretention and planters
o Permeable Pavement
o Similar BMPs infiltrating over an extensive surface area and providing robust pretreatment or embedded treatment processes.
• Separation to mounded seasonally high groundwater shall be at least 10 feet for infiltration devices that inject water below the subsurface and surface infiltration BMPs with tributary area and land use activities that are considered to pose a more significant risk to groundwater quality. BMPs for which the 10-foot separation applies include:
o Dry wells
o Subsurface infiltration galleries or vaults
o Surface Infiltration Basins
o Infiltration Trenches
o Other functionally similar devices or BMPs.
2494
2495

STANDARD DETAIL

STORMWATER BIOFILTRATION SYSTEM
MWS-L-4-4-4'-9"-V

SITE SPECIFIC DATA
INTERNAL BYPASS DISCLOSURE:

PLAN VIEW

ELEVATION VIEW RIGHT END VIEW

LEFT END VIEW

GENERAL NOTES

INSTALLATION NOTES
LOW INFLOW PIPE DISCLOSURE:
2496
2497

ORANGE COUNTY

RIVERSIDE COUNTY

ORANGE COUNTY

SAN BERNARDINO COUNTY

ORANGE COUNTY

LOS ANGELES COUNTY

ORANGE COUNTY

LOS ANGELES COUNTY

1.05 0.7

0.95 1

0.9 0.85

0.8 0.75

0.7 0.65

0.95 0.7

0.9 0.9

0.75 P:\9526E\6-GIS\Mxds\Reports\InfiltrationFeasability_20110215\9526E_FigureXVI-1_RainfallZones_20110215.mxd FIGURE

JOB TITLE SCALE
1" = 1.8 miles

DESIGNED

DRAWING

CHECKED
BMP
04/22/10 DATE
JOB NO.

TH
TH
9526-E

ORANGE COUNTY

TECHNICAL GUIDANCE

DOCUMENT
ORANGE CO. CA

RAINFALL ZONES

SUBJECT TO FURTHER REVISION
0 3.6 7.2 1.8
Miles
0 6 12 3
Kilometers
LEGEND
Orange County Precipitation Stations24 Hour, 85th Percentile Rainfall (Inches)24 Hour, 85th Percentile Rainfall (Inches) - ExtrapolatedCity Boundaries Rainfall ZonesDesign Capture Storm Depth (inches)

0.65"0.70.750.800.850.900.951.001.10"
Note: Events defined as 24-hour periods (calendar days) with greater than 0.1 inches of rainfall. For areas outside of available data coverage, professional judgment shall be applied.

XVI-1
Project Site
2498

ORANGE COUNTY

RIVERSIDE COUNTY

ORANGE COUNTY

SAN BERNARDINO COUNTY

ORANGE COUNTY

LOS ANGELES COUNTY

ORANGE COUNTY

LOS ANGELES COUNTY
P:\9526E\6-GIS\Mxds\Reports\InfiltrationFeasability_20110215\9526E_FigureXVI-2a_HydroSoils_20110215.mxd FIGURE XVI-2a

JOB TITLE SCALE
1" = 1.8 miles

DESIGNED

DRAWING

CHECKED
BMP
02/09/11 DATE
JOB NO.

TH
TH
9526-E

ORANGE COUNTY

INFILTRATION STUDY
ORANGE CO. CA

NRCS HYDROLOGIC

SOILS GROUPS

SUBJECT TO FURTHER REVISION
Source: Soils: Natural Resources Conservation Service (NRCS)Soil Survey - soil_ca678, Orange County & Western RiversideDate of publication: 2006-02-08 I!
0 3.6 7.2 1.8
Miles
0 5 10 2.5
Kilometers
LEGEND
City Boundaries
Hydrologic Soil Groups
A SoilsB SoilsC SoilsD Soils
http://websoilsurvey.nrcs.usda.gov/app/HomePage.htm
Project Site
2499

ORANGE COUNTY

RIVERSIDE COUNTY

ORANGE COUNTY

SAN BERNARDINO COUNTY

ORANGE COUNTY

LOS ANGELES COUNTY

ORANGE COUNTY

LOS ANGELES COUNTY
10 10
3 5
10 30
10 30
10 20
10 10
5 50
3 30
30 30
30 20
5 10
20 30
50 10
30 20
P:\9526E\6-GIS\Mxds\Reports\InfiltrationFeasability_20110215\9526E_FigureXVI-2d_DepthToGroundwaterOverview_20110215.mxd FIGURE XVI-2d

JOB TITLE SCALE
1" = 1.25 miles

DESIGNED

DRAWING

CHECKED
BMP
02/09/11 DATE
JOB NO.

TH
TH
9526-E

ORANGE COUNTY

INFILTRATION STUDY
ORANGE CO. CA

NORTH ORANGE COUNTY

MAPPED DEPTH TO FIRST

GROUNDWATER

SUBJECT TO FURTHER REVISION
Note: Data are not available for South Orange County at this time.Source:Sprotte, Fuller and Greenwood, 1980.California Division of Mines and Geology;California Geological Survey I!
0 2.5 5 1.25
Miles
048 2
Kilometers
LEGEND
Depth To First Groundwater ContoursCity BoundariesOCWD Groundwater Basin Protection Boundary Project Site
2500

ORANGE COUNTY

RIVERSIDE COUNTY

ORANGE COUNTY

SAN BERNARDINO COUNTY

ORANGE COUNTY

LOS ANGELES COUNTY

ORANGE COUNTY

LOS ANGELES COUNTY
P:\9526E\6-GIS\Mxds\Reports\InfiltrationFeasability_20110215\9526E_FigureXVI-2g_InfiltrationFinal_20110215.mxd FIGURE XVI-2g

JOB TITLE SCALE
1" = 1.8 miles

DESIGNED

DRAWING

CHECKED
BMP
04/22/10 DATE
JOB NO.

TH
TH
9526-E

ORANGE COUNTY

INFILTRATION STUDY
ORANGE CO. CA

INFILTRATION ANALYSIS

OVERLAPPING CONSTRAINT

LOCATIONS

SUBJECT TO FURTHER REVISION
Analysis Layers Included: 1. Hydrologic Soil Group D, 2. LandslideHazard Zone, 3. Groundwater Protection Areas 4. ApproximateSelinium Area, 5. Depth to Groundwater <= 5' Note: Screening datasets are not exhaustive. The applicant shouldalways conduct a review of available site-specific information relative to infiltration constraints as part of assessing the feasibility of stormwater infiltration.Source;Infiltration Constraint Analysis: PACE/Geosyntec 0 3.6 7.2 1.8
Miles
0 5 10 2.5
Kilometers
LEGEND
OCWD Groundwater Basin Protection BoundaryCity Boundaries Infiltration Constraints
1 Constraint2 Overlapping Constraints3 Overlapping Constraints4 Overlapping Constraints Project Site
2501
P:\9526E\6-GIS\Mxds\SuceptabilityMaps_20100505\9526E_SantaAnaRiverSusceptibility_20100430.mxd Cleveland
National Forest
San Bernardino
County
Riverside County
South Orange
County
Newport Bay
Watershed
Stabilized by
Grade Control
Structure
San Gabriel-Coyote Creek
Watershed
Anaheim BayHuntington Harbor
Watershed
Peters
Canyon
Reservoir
Olive
Hills
Kraemer
Basin
Carbon
Canyon
Walnut
Canyon
Reservoir
Irvine
Lake
Anaheim
Lake
Warner
Basin
Miller
Retarding
Basin
Bartlett
Retarding
Basin
Fletcher
Retarding
Basin

SOUTHPARK
PUMP

STATION
Villa
Park Dam
Yorba Linda
Reservoir
Sources: Esri, DeLorme, NAVTEQ, USGS, Intermap, iPC, NRCAN, Esri Japan, METI, Esri China (Hong Kong), Esri (Thailand), TomTom, 2012 FIGURE
3 JOB TITLE SCALE 1" = 12000'

DESIGNEDDRAWINGCHECKED
BMP
04/30/10
DATEJOB NO.

THTH9526-E

ORANGE COUNTY

WATERSHED

MASTER PLANNING
ORANGE CO. CA

SUSCEPTIBILITY ANALYIS

SANTA ANA RIVER
I! 0 12,000 24,000
Feet
Susceptibility
Potential Areas of Erosion, Habitat, &
Physical Structure Susceptibility
Channel Type
Earth (Unstable)
Earth (Stabilized)
Stabilized
Tidel Influence
<= Mean High Water Line (4.28')
Water Body
Basin
Dam
Lake
Reservoir
Forest Areas
Cleveland National Forest
Federal Lands
Amarus Salt Marsh
Sources: Esri, DeLorme, NAVTEQ,
USGS, Intermap, iPC, NRCAN, Esri
Japan, METI, Esri China (Hong
Kong), Esri (Thailand), TomTom,
2012
SUSCEPTIBILITY MAP UPATE (FEB 2013)
Project Site
2502

APPENDIX D

O&M PLAN
2503

OPERATIONS AND MAINTENANCE (O&M) PLAN
Water Quality Management Plan
For
Orange Apartments
840 The City Drive
Orange, CA 92868
Coordinates: 33.774803, -117.890983
APN 231-261-09; 231-261-13; 231-261-15; 231-261-16; 231- 261-17
2504
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2505

OP ERA TIONS AND MA INTENANCE PLAN

Page 3 of 11 ends

Orange City CouncilApril 11, 2023

Orange City Council
April 11, 2023