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Project X REPORT S230929B Corrosion Engineering Page 2 Corrosion Control – Soil, Water, Metallurgy Testing Lab 29990 Technology Dr., Suite 13, Murrieta, CA 92563 Tel: 213-928-7213 Fax: 951-226-1720 www.projectxcorrosion.com Soil Analysis Lab Results Client: Geotechnical Professionals Inc. Job Name: Mater Dei Dance Client Job Number: 3204.I Project X Job Number: S230929B October 2, 2023 Method ASTM G51 ASTM G200 SM 4500-D ASTM D4327 ASTM D6919 ASTM D6919 ASTM D6919 ASTM D6919 ASTM D6919 ASTM D6919 ASTM D4327 ASTM D4327 Bore# / Description Depth pH Redox Sulfide S2- Nitrate NO3- Ammonium NH4+ Lithium Li+ Sodium Na+ Potassium K+ Magnesium Mg2+ Calcium Ca2+ Fluoride F2-- Phosphate PO43- (ft)(mg/kg) (wt%) (mg/kg) (wt%) (Ohm-cm) (Ohm-cm)(mV) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) B-1 0-5 354.4 0.0354 13.5 0.0014 938 804 7.8 188 ND 6.9 2.8 ND 49.7 5.5 46.5 172.0 9.5 80.4 ASTM G187 ASTM D4327 ASTM D4327 Resistivity As Rec'd | Minimum Sulfates SO42- Chlorides Cl- Cations and Anions, except Sulfide and Bicarbonate, tested with Ion Chromatography mg/kg = milligrams per kilogram (parts per million) of dry soil weight ND = 0 = Not Detected | NT = Not Tested | Unk = Unknown Chemical Analysis performed on 1:3 Soil-To-Water extract PPM = mg/kg (soil) = mg/L (Liquid) Note: Sometimes a bad sulfate hit is a contaminated spot. Typical fertilizers are Potassium chloride, ammonium sulfate or ammonium sulfate nitrate (ASN). So this is another reason why testing full corrosion series is good because we then have the data to see if those other ingredients are present meaning the soil sample is just fertilizer-contaminated soil. This can happen often when the soil samples collected are simply surface scoops which is why it's best to dig in a foot, throw away the top and test the deeper stuff. Dairy farms are also notorious for these items. Table 1 1202 W Edinger Ave10/3/2024