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Soil borings will be drilled to a maximum depth of 16 feet below ground surface (bgs) or refusal,whichever comes first. During advancement of the borings, each sample will be screened for organic vapors with a photoionization detector (PID) and evaluated for human sensory indications of environmental impact. Soil samples from discrete intervals will be collected directly from the Geoprobe® dedicated, disposable acetate liners. Upon opening the core or exposing the soils, Partner will immediately screen the recovered soil core for the presence of volatile organic vapors of the samples. Soil screening will be completed using a Ray Systems MiniRAE® PID calibrated with a 100-part per million (ppm„„) isobutylene-in-air commercial grade gas standard. Soil samples will be examined for overburden classification, as well as for visual evidence of impacts. Soil type, consistency, and the thickness/depth of the units will be used to develop soil boring logs and to define the subject property's stratigraphy.The Unified Soil Classification System (USCS) will be used to classify the soil type. Soil descriptions will be recorded in a dedicated field log. Soil samples will be collected from the interval that exhibits the greatest evidence of volatile organic compound (VOC) detections observed via the use of the above-referenced PID. If no elevated PID readings or human sensory indications of soil impact are identified, Partner will collect a soil sample based on judgement of the most probable depth at which a release would be detected in soils at a given sample location. Each soil sample will be analyzed for carbon chain total petroleum hydrocarbons (TPH-cc) via EPA Method 8015, VOCs via EPA Method 8260/5035, and polycyclic aromatic hydrocarbons (PAHs) via EPA Method 8270. Groundwater Sampling To evaluate groundwater quality at the subject property, four soil borings will be converted into temporary groundwater sampling points. If necessary, the borings will be advanced to a maximum depth of 20-feet bgs, drilling refusal, or until groundwater is encountered, whichever comes first, in an attempt to reach the water table. The groundwater samples will be collected by installing a 1-inch inside diameter (ID) polyvinyl chloride (PVC)well screen and riser pipe in the annular space of the borings or by using hydropunch-type sampling equipment. If groundwater is encountered, the samples will be collected using a low-flow peristaltic pump or check valve and disposable tubing or by using disposal bailers. Groundwater samples will be analyzed for TPH-cc via EPA Method 8015, VOCs via EPA Method 8260, and PAHs via EPA Method 8270. Field quality assurance/quality control (QA/QC) procedures will be used to ensure that samples collected are representative of the actual conditions and do not contain contaminants introduced either from the field activities or from sample transit. Field QA/QC will include the following procedures: 1) calibration of field equipment; 2) the collection of a trip blank for VOCs; 3) decontamination of down-hole drilling equipment; 4) the use of dedicated and disposable field sampling equipment; and 5) proper sample handling, preservation, and chain-of-custody. Equipment that directly or indirectly comes into contact with sample media will be decontaminated prior to use and between each sample location. Decontamination of sampling equipment will be performed using a distilled water and Alconox® solution wash, followed by a distilled water rinse. Investigative Derived Waste