Site-Specific Health and Safety Plan (HASP) - Laschools.org

Table 6-2
Practical Quantitation Limits
Los Angeles Unified School District Proposed South Region Highschool #9 and Middle School #4
Method/Analyte a/
PQL c/
Water b/
MCL (Fed.) d/ MCL (CA) e/
PRG f/
Soil
PQL PRG g/
Lead 0.003 NA NA NA 0.3 400
Manganese 0.015 NA 0.05 m/ 0.88 1.5 1800
Molybdenum 0.02 NA NA 0.18 2 390
Nickel 0.05 NA 0.1 0.73 5 1600
Selenium 0.005 0.05 0.05 0.18 0.5 390
Silver 0.01 NA 0.1 m/ 0.18 1 390
Thallium 0.001 0.002 0.002 0.0026 1 5.5
Vanadium 0.05 NA 0.015 l/ 0.26 5 550
Zinc 0.02 NA 0.5 m/ 11 5 2.30E+04
Hexavalent Chromium (SW7199A) (ug/L) (ug/L) (ug/L) (ug/L) (ug/kg) (ug/kg)
Hexavalent Chromium 0.3 w/ NA NA 0.16 40 200
Cold Vapor Atomic Absorption (mg/L) (mg/L) (mg/L) (mg/L) (mg/kg) (mg/kg)
Mercury (SW7470A/7471A) 0.0005 0.002 0.002 0.011 0.25 23
Anions (SW9056) (mg/L) (mg/L) (mg/L) (mg/L) (mg/kg) (mg/kg)
Chloride 1 NA 250 t/ NA 1 NA
Nitrate 1 10 45 NA 1 NA
Sulfate 1 NA 250 t/ NA 1 NA
Methane, Ethane, Ethene (RSK-175SOP) (mg/L) (mg/L) (mg/L) (mg/L) (mg/kg) (mg/kg)
Methane 0.05 NA NA NA NA NA
Ethane 0.05 NA NA NA NA NA
Ethene 0.01 NA NA NA NA NA
Total Organic Carbon (SW9060) 1 NA NA NA 100 NA
a/ Methods: SW - U.S. Environmental Protection Agency (EPA). 1995b. Test Methods for Evaluating Solid Waste:
Physical/Chemical Methods, SW-846, (3rd Edition, including Updates I, II, III and IIIA). USEPA Methods for the Analysis of Water and Wastes (1993)
b/ Water PQLs should meet tap water PRGs as the project threshold value. When PQLs cannot detect down to tap water PRGs, California MCLs (when available) will be used as
the project threshold value. If California MCLs are not available, then federal MCLs become the project threshold.
c/ PQL = Practical Quantiation Limit
d/ MCL (Fed) = Federal Maximum Contaminant Level for drinking water
e/ MCL (CA) = Primary California Maximum Contaminat Level for drinking water (Title 22 CCR)
f/ PRG = Preliminary Remediation Goal for Tap Water (EPA Region 9) (USEPA, 2002)
g/ PRG = Preliminary Remediation Goal for Residential Soil (EPA Region 9) (USEPA, 2002)
h/ µg/L = microgram per Liter
i/ µg/kg = microgram per kilogram
j/ PQL is greater than the tap water PRG but less than MCL. Project DQOs met since MCL is regulatory threshold for potentially triggering further action.
k/ This PQL although above the PRG represents the lowest possible detection limit for this compound and will be used as the project threshold value.
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