Rock Hill Diabase

Hazard statements (CLP)

H314, H318, H335, H350

Code

Statements

H314

Causes severe skin burns and eye damage

SECTION 2: Hazards identification

GHS Classification GHS Classification CARCINOGENICITY – Category 1A; H350 SPECIFIC TARGET ORGAN TOXICITY (REPEATED EXPOSURE) – Category 2; H335 SKIN CORROSION/IRRITATION – Category 1C; H314 SERIOUS EYE DAMAGE/EYE IRRITATION – Category 1; H318

Signal word

Danger

Hazard statements

May cause cancer May cause damage to organs (lung) through prolonged or repeated exposure Causes skin irritation Causes serious eye irritation

Prevention

Obtain special instructions before use. Do not handle until all safety precautions have been read and understood. Wash any exposed body parts. Wear protective gloves/protective clothing/eye protection/face protection. Avoid breathing dusts or mists. Avoid creating dusts

Response

when handling. If exposed or concerned Get medical advice/attention. If on skin Wash with plenty of water Take off contaminated clothing and wash it before reuse. If in eyes: Rinse continuously with

Storage

water for several minutes. Remove contact lenses, if present and easy to do. Restrict or control access to stockpile areas (store locked up). Engulfment hazard: To prevent burial or suffocation, do not enter a confined space, such as a silo, bulk truck or other storage container or vessel that stores or contains aggregates without an effective procedure for

Disposal

assuring safety. Dispose of contents/container in accordance with local/regional/national/international

2.3 Other hazards

regulations. None known

2.1 Classification of the substance or mixture

CARCINOGENICITY – Category 1A; H350 SPECIFIC TARGET ORGAN TOXICITY (REPEATED EXPOSURE) – Category 2; H335 SKIN CORROSION/IRRITATION – Category 1C; H314 SERIOUS EYE DAMAGE/EYE IRRITATION – Category 1; H318 GHS label elements Hazard pictograms: Signal word: Danger Hazard statements: May cause cancer May cause damage to organs (lung) through prolonged or repeated exposure Causes skin irritation Causes serious eye irritation Precautionary statements: Prevention: Obtain special instructions before use. Do not handle until all safety precautions have been read and understood. Wash any exposed body parts. Wear protective gloves/protective clothing/eye protection/face protection. Avoid breathing dusts or mists. Avoid creating dusts Response: when handling. If exposed or concerned: Get medical advice/attention. If on skin: Wash with plenty of water. Take off contaminated clothing and wash it before reuse. If in eyes: Rinse continuously with Storage: water for several minutes. Remove contact lenses, if present and easy to do. Restrict or control access to stockpile areas (store locked up). Engulfment hazard: To prevent burial or suffocation, do not enter a confined space, such as a silo, bulk truck or other storage container or vessel that stores or contains aggregates without an effective procedure for Disposal: assuring safety. Dispose of contents/container in accordance with local/regional/national/international Hazards not otherwise classified regulations. (HNOC): None known Section 3. Composition/information on ingredients CAS number/othe r identifiers Substance/mixture: Diabase Ingredient name % CAS number Diabase > 90 None Crystalline Silica (Quartz) 20-55 14808-60-7 Actinolite, Asbestiform* 0-0.5 1332-21-4 *Individual composition of minerals and hazardous constituents of diabase vary naturally. There are no additional ingredients present which, within the current knowledge of the supplier and in the concentrations applicable, are classified as hazardous to health or the environment and hence require reporting in this section. These materials are mined from the earth. Trace amounts of naturally occurring elements might be detected during chemical analysis of these materials. Occupational exposure limits, if available, are listed in Section 8. Section 4. First aid measures Description of necessary first aid measures Eye Contact: Dust: Immediately flush with plenty of water for at least 15 minutes. Hold eyelids apart. Remove contacts is present and easy to do. Occasionally lift the eyelid(s) to ensure thorough rinsing. Beyond flushing, do not attempt to remove material from the eye(s). Get medical attention if irritation develops or persists. Inhalation: Dust: Move to fresh air. Call a physician if symptoms develop or persist. Skin Contact: Dust: Wash off with soap and water. Get medical attention if irritation develops or persists. Ingestion: Dust: Rinse mouth and drink plenty of water. Never give anything by mouth to an unconscious person. Get medical attention. Most important symptoms/effects, acute and delayed Inhaling dust may cause discomfort in the chest, shortness of breath, and coughing. Prolonged inhalation may cause chronic health effects. This product contains crystalline silica. Prolonged or repeated inhalation of respirable crystalline silica liberated from this product can cause silicosis and may cause lung cancer. This product may contain trace amounts of actinolite, asbestiform. Prolonged or repeated inhalation of actinolite, asbestiform can cause asbestosis, and may cause lung cancer and mesothelioma. Indication of immediate medical attention and special treatment needed, if necessary Notes to physician: Provide general supportive measures and treat symptomatically. Keep victim under observation. Symptoms may be delayed. Specific treatments: Not Applicable Protection of first-aiders: Ensure that medical personnel are aware of the material(s) involved, and take precautions to protect themselves. General information: Pre-existing medical conditions that may be aggravated by exposure include disorders of the eye, skin and lung (including asthma and other breathing disorders). If addicted to tobacco, smoking will impair the ability of the lungs to clear themselves of dust. See toxicological information (Section 11) Section 5. Fire-fighting measures Extinguishing media Suitable extinguishing media: Not flammable. Use fire-extinguishing media appropriate for surrounding materials. Unsuitable extinguishing media: None known. Specific hazards arising from the No unusual fire or explosion hazards noted. Not a combustible dust. chemical: Hazardous thermal decomposition Products: None known Special protective equipment for fire- fighters: Use protective equipment appropriate for surrounding materials. No specific precautions. General fire hazards: Contact with powerful oxidizing agents may cause fire and/or explosions (see section 10 of SDS). No unusual fire or explosion hazards. Section 6. Accidental release measures Personal precautions, protective equipment and emergency procedures Wear appropriate protective equipment and clothing during clean-up of materials that contain or may liberate dust. Methods and materials for containment, cleaning up and Environmental precautions Spilled material, where dust is generated, may overexpose cleanup personnel to dust. Do not dry sweep or use compressed air for clean-up. Wetting of spilled material and/or use of respiratory protective equipment may be necessary. Avoid discharge of fine particulate matter into drains or water sources. Section 7. Handling and storage Precautions for safe handling Protective measures: Do not handle until all safety precautions have been read and understood. Keep formation of airborne dusts to a minimum. Provide appropriate exhaust ventilation at places where dust is formed. Do not breathe dust. Avoid prolonged exposure. Provide adequate ventilation. Wear appropriate personal protective equipment. Advice on general occupational hygiene: Observe good industrial hygiene practices. Promptly remove dusty clothing and launder before reuse. Conditions for safe storage, including any incompatibilities: Avoid dust formation or accumulation. Section 8. Exposure controls/personal protection Ingredient name Exposure limits Particulates not otherwise classified ACGIH TLV (United States, Canada) (CAS SEQ250) TWA: 3 mg/mᵌ. Form: Respirable particles TWA: 10 mg/mᵌ. Form: Inhalable particles OSHA PEL (United States) PEL: 5 mg/mᵌ. Form: Respirable fraction PEL: 15 mg/mᵌ. Form: Total dust MSHA PEL (United States) PEL: 5 mg/mᵌ. Form: Respirable fraction PEL: 10 mg/mᵌ. Form: Total dust Crystalline Silica (Quartz) (CAS 14808-60-7) ACGIH TLV (United States) TWA: 0.025 mg/mᵌ. Form: Respirable fraction OSHA PEL (United States) TWA: 0.05 mg/mᵌ. Form: Respirable MSHA PEL (United States) TWA: 10/(%SiO2 + 2) in mg/m3 Provincial Exposure Limits (Canada, various) § Alberta (OHS Code) 0.025 mg/mᵌ 8 hour TWA § British Columbia (WorkSafeBC OHS Regulation) 0.025 mg/mᵌ 8 hour TWA § British Columbia (Health, Safety & Reclamation Code, Mines Act) 0.1 mg/mᵌ 8 hour TWA § Manitoba (Workplace Safety and Health Regulation) 0.025 mg/mᵌ 8 hour TWA § New Brunswick 0.025 mg/mᵌ 8 hour TWA § Newfoundland 0.025 mg/mᵌ 8 hour TWA § Nova Scotia 0.025 mg/mᵌ 8 hour TWA § Ontario (O. Reg 490/09; and O. Reg. 833) 0.1 mg/mᵌ 8 hour TWA § Prince Edward Island 0.025 mg/mᵌ 8 hour TWA § Quebec (Regulation Respecting OHS, Chapter S-2.1, r. 13) 0.1 mg/mᵌ 8 hour TWA § Saskatchewan (OHS Regulations) 0.05 mg/mᵌ 8 hour TWA Actinolite, Asbestiform (CAS 1332-21-4) ACGIH TLV (United States, Canada) 0.1 f/cc OSHA/MSHA PEL (United States) 0.1 f/cc Appropriate engineering controls: Good general ventilation (typically 10 air changes per hour indoors) should be used. Ventilation rates should be matched to conditions. If applicable, use process enclosures, local exhaust ventilation, or other engineering controls to maintain airborne levels below recommended exposure limits. If exposure limits have not been established, maintain airborne levels to an acceptable level. Exposure guidelines: OSHA PELs, MSHA PELs, and ACGIH TLVs are 8-hr TWA values. Occupational exposure to nuisance dust (total and respirable), respirable crystalline silica, and actinolite asbestos should be monitored and controlled. Terms including “Particulates Not Otherwise Classified,” “Particulates Not Otherwise Regulated,” Particulates Not Otherwise Specified,” and “Inert or Nuisance Due” are often used interchangeably; however, the user should review each agency’s terminology for differences in meanings. Biological limit values: No biological exposure limits noted for the ingredient(s) Individual protection measures Hygiene measures: Always observe good personal hygiene measures, such as washing after handling the material and before eating, drinking, and/or smoking. Routinely wash work clothing and protective equipment to remove contaminants. Eye/face protection: Wear safety glasses with side shields (or goggles). Hand protection: Use personal protective equipment as required. Body protection: Use personal protective equipment as required. Other skin protection: Use personal protective equipment as required. Respiratory protection: When handling or performing work that produces dust in excess of applicable exposure limits, wear a NIOSH-approved respirator that is properly fitted and is in good condition. Respirators must be used in accordance with all applicable workplace regulations. Thermal hazards: Not anticipated. Wear appropriate thermal protective clothing if necessary. Section 9. Physical and chemical properties Appearance Physical State: Solid, particles of granular Lower and Upper explosive flammable Not applicable mixture limits Color: Various colors, grey or red Vapor pressure: Not applicable Odor: Not applicable Vapor density: Not applicable Odor threshold: Not applicable Relative density: Not available pH: Not available Solubility: Not available Melting point: Not applicable Solubility in water: Insoluble Boiling point: Not applicable Partition coefficient: n-octanol/water: Not applicable Flash point: Non-combustible Auto-ignition temperature: Not applicable Burning time: Not applicable Decomposition temperature: Not applicable Burning rate: Not applicable SADT: Not available Evaporation Rate: Not applicable Viscosity: Not applicable Flammability (solid, gas): Not applicable Section 10. Stability and reactivity Reactivity: The product is stable and non-reactive under normal conditions of use, storage and transport. Chemical Stability: Material is stable under normal conditions Possibility of hazardous reactions: No dangerous reaction known under conditions of normal use. Conditions to avoid: Avoid contact with strong oxidizing agents. Incompatible materials: Crystalline silica may react violently with strong oxidizing agents, causing fire and explosions. Hazardous decomposition Silica dissolves in hydrofluoric acid producing a corrosive gas-silicon tetrafluoride. products: Section 11. Toxicological information Information on toxicological effects Acute toxicity: Not expected to be acutely toxic. Irritation/Corrosion: Skin: Dust: May cause irritation through mechanical abrasion. This product is not expected to be a skin hazard. Eyes: Direct contact with eyes may cause temporary irritation through mechanical abrasion. Inhalation: Repeated inhalation of respirable crystalline silica (quartz) may cause silicosis, a fibrosis (scarring) of the lungs. Silicosis is irreversible and may be fatal. Silicosis increases the risk of contracting pulmonary tuberculosis. Some studies suggest that repeated inhalation of respirable crystalline silica may cause other adverse health effects including lung and kidney cancer. Repeated inhalation of actinolite, asbestiform fibers may lead to a characteristic pneumoconiosis termed asbestos, a diffuse interstitial lung fibrosis. Individuals with fully developed asbestosis will experience dyspnea, which is often accompanied by rales or cough and deficits in pulmonary function variables ad cardiovascular effects may occur. Besides asbestosis, chronic asbestos exposure may cause lung cancer, mesothelioma (primarily of the pleura, but also of the peritoneum), pleural disease, and pleural plaques. Tobacco smokers exposed to respirable crystalline silica (quartz) and asbestos fibers are at greater risk for lung cancer than nonsmokers. Ingestion: Not likely due to product form. However accidental ingestion may cause discomfort. Sensitization: Respiratory sensitization: No respiratory sensitizing effects known. Skin sensitization: Not known to be a dermal irritant or sensitizer. Mutagenicity: No data available to indicate product or any components present at greater than 0.1% are mutagenic or genotoxic. Aspiration Hazard: Not expected to be an aspiration hazard. Reproductive toxicity: Not expected to be a reproductive hazard. Symptoms related to physical, chemical and toxicological characteristics: Dust: discomfort in the chest. Shortness of breath. Coughing. Carcinogenicity: Respirable crystalline silica and actinolite, asbestiform have been classified by IARC and NTP as known human carcinogens. ACGIH classifies respirable crystalline silica as a suspected human carcinogen and actinolite, asbestiform as a known human carcinogen. Product/ingredient name OSHA ACGIH NTP Crystalline Silica (Quartz) (CAS 14808-60-7) Listed A2 Known to be human Carcinogen Actinolite, Asbestiform (CAS 1332-21-4) Listed A1 Known to be human Carcinogen Specific target organ toxicity (acute exposure) Name Category Route of Exposure Target Organs Crystalline Silica (Quartz) CAS 14808-60-7) - Inhalation Not reported to have effects Actinolite, Asbestiform (CAS 1332-21-4) Specific target organ toxicity (chronic exposure) Name Category Route of Exposure Target Organs Crystalline Silica (Quartz) CAS 14808-60-7) - Inhalation May cause damage to organs (lung through Actinolite, Asbestiform (CAS 1332-21-4) prolonged or repeated inhalation exposure). Actinolite asbestos may cause mesothelioma. Section 12. Ecological Information Ecotoxicity Not expected to be harmful to aquatic organisms. Discharging diabase and fines into waters may increase total suspended particulate (TSP) levels that can be harmful to certain aquatic organisms. Persistence and degradability: Not applicable. Bioaccumulative potential: Not applicable. Mobility in soil: Not applicable. Other adverse effects: No other adverse environmental effects (e.g., ozone depletion, photochemical ozone creation potential, global warming potential) are expected from this component. Section 13. Disposal considerations Disposal methods: Do not allow fine particulate matter to drain into sewers/water supplies. Do not contaminate ponds, waterways or ditches with fine particulates. Dispose of contents in accordance with local/regional/national/international regulations. Hazardous waste code: Not regulated. Waste from residues/unused products: Dispose of in accordance with local regulations. Empty containers or liners may retain some product residues. This material and its container must be disposed of in a safe manner. Contaminated packaging: Since emptied containers may retain product residue, follow label warnings even after container is emptied. Empty packaging materials should be recycled or disposed of in accordance with applicable regulations and practices. Section 14. Transportation information DOT Classification IMDG IATA UN number Not regulated. Not regulated. UN proper shipping name - Transport hazard class(es) - Packing group - Environmental hazards - Canada TDG - Additional Information - Transport in bulk according to Annex II of MARPOL 73/78 and the IBC Code Section 15. Regulatory Information U.S. Federal regulations: OSHA Hazard Communication This product is a “Hazardous Chemical” as defined by the OSHA Hazard Communication Standard, 29 CFR 1910.1200 TSCA Section 12(b) Export Notification (40 CFR 707, Subpart. D): Not regulated OSHA Specifically Regulated Substances (29 CFR 1910.1001-1050): Crystalline Silica: Listed / Actinolite, Asbestiform: Listed CERCLA Hazardous Substance List (40 CFR 302.4): Crystalline Silica: Not listed / Actinolite, Asbestiform: Listed Clean Air Act Section 112 (b): Hazardous Air Pollutants (HAPs): Crystalline Silica: Not listed / Actinolite, Asbestiform: Listed Clean Air Act Section 112 (r) Accidental Release Prevention (40 CFR 68.130): Crystalline Silica: Not listed / Actinolite, Asbestiform: Listed Safe Drinking Water Act (SDWA): Crystalline Silica: Not listed / Actinolite, Asbestiform: Listed Canada Federal regulations: Listed on DSL or exempt NSNR Status: SARA 311/312 Classification: Delayed (chronic) health hazard Composition/information on ingredients Name % Fire Sudden Reactive Immediate Delayed (chronic) health hazard Hazard release of (acute) health pressure hazard Crystalline Silica (Quartz) CAS >1 No Yes 14808-60-7 Actinolite, Asbestiform (CAS 1332- 0-0.5 No Yes 21-4) SARA 313 (TRI) Product name CAS number % Form R-Report requirements Crystalline Silica (Quartz) 14808-60-7 Not regulated Actinolite, Asbestos 1332-21-4 Regulated State regulations Massachusetts RTK: The following components are listed: Crystalline Silica (Quartz) (CAS 14808-60-7), Respirable Tridymite and Cristobalite (other forms of crystalline silica) (CAS Mixture); Asbestos (CAS 1332- 21-4) New Jersey RTK: The following components are listed: Crystalline Silica (Quartz) (CAS 14808-60-7), Respirable Tridymite and Cristobalite (other forms of crystalline silica) (CAS mixture) ; Asbestos (CAS 1332- 21-4) Pennsylvania RTK: The following components are listed: Crystalline Silica (Quartz) (CAS 14808-60-7), Respirable Tridymite and Cristobalite (other forms of crystalline silica) (CAS Mixture) ; Asbestos (CAS 1332- 21-4) Rhode Island RTK: Asbestos (CAS 1332-21-4) California Prop. 65 WARNING: This product contains crystalline silica and may contain other trace substances (actinolite asbestiform) known to the State of California to cause cancer. Ingredient name Cancer Reproductive No significant risk level Maximum acceptable dosage level Crystalline Silica (Quartz) CAS 14808-60-7 Yes No Actinolite, Asbestiform (CAS 1332-21-4) Yes No International regulations Ingredient name CAS # TSCA Canada WHMIS EEC Crystalline Silica (Quartz) 14808-60-7 Yes DSL D2A EINECS Actinolite, Asbestiform 1332-21-4 Yes DSL D2A EINECS WHMIS Classification: D2A “Materials Causing Other Toxic Effects” Section 16. Other Information Date of issue: 12/01/2021 Version: Rev 01 Notice to reader While the information provided in this safety data sheet is believed to provide a useful summary of the hazards of diabase as it is commonly used, the sheet cannot anticipate and provide all of the information that might be needed in every situation. Inexperienced product users should obtain proper training before using this product. In particular, the data furnished in this sheet do not address hazards that may be posed by other materials mixed with diabase to produce diabase products. Users should review other relevant material safety data sheets before working with this diabase or working on diabase products. SELLER MAKES NO WARRANTY, EXPRESS OR IMPLIED, CONCERNING THE PRODUCT OR THE MERCHANTABILITY OR FITNESS THEREOF FOR ANY PURPOSE OR CONCERNING THE ACCURACY OF ANY INFORMATION PROVIDED BY Lehigh Hanson, except that the product shall conform to contracted specifications. The information provided herein was believed by the Lehigh Hanson to be accurate at the time of preparation or prepared from sources believed to be reliable, but it is the responsibility of the user to investigate and understand other pertinent sources of information to comply with all laws and procedures applicable to the safe handling and use of product and to determine the suitability of the product for its intended use. Buyer’s exclusive remedy shall be for damages and no claim of any kind, whether as to product delivered or for non-delivery of product, and whether based on contract, breach of warranty, negligence, or otherwise shall be greater in amount than the purchase price of the quantity of product in respect of which damages are claimed. In no event shall Seller be liable for incidental or consequential damages, whether Buyer’s claim is based on contract, breach of warranty, negligence or otherwise. Abbreviations ACGIH — American Conference of Governmental Industrial Hygienists CAS — Chemical Abstract Service CERCLA — Comprehensive Emergency Response and Comprehensive Liability Act CFR — Code of Federal Regulations DOT — Department of Transportation GHS — Globally Harmonized System HEPA — High Efficiency Particulate Air IATA — International Air Transport Association IARC — International Agency for Research on Cancer IMDG — International Maritime Dangerous Goods NIOSH — National Institute of Occupational Safety and Health NOEC — No Observed Effect Concentration NTP — National Toxicology Program OSHA — Occupational Safety and Health Administration PEL — Permissible Exposure Limit REL — Recommended Exposure Limit RQ — Reportable Quantity SARA — Superfund Amendments and Reauthorization Act SDS — Safety Data Sheet TLV — Threshold Limit Value TPQ — Threshold Planning Quantity TSCA — Toxic Substances Control Act TWA — Time-Weighted Average UN — United Nations ATTACHMENT B LIMITED ACTIVITY EVENTS SAMPLING PLAN Introduction The Pennsylvania Department of Environmental Protection (DEP) has requested that Hanson Aggregates Pennsylvania LLC (“Hanson”) propose an activity-based sampling plan that simulates low-levels of activity at the Rock Hill Quarry (the “Quarry”). Hanson plans to conduct limited activities at the Rock Hill Quarry. The limited activities outlined below reflect Hanson’s annual removal of 500 tons of stone at the Quarry. This document proposes the sequence of operations performed, the emission controls employed, and the air monitoring to be conducted. Please note, this activity does not include crushing, processing, drilling, or blasting activities. These activities and other future activities would require approval from the DEP before construction. Applicable emission controls and monitoring, if necessary and different than those proposed herein, will be proposed at that time. Limited Activity Events The following limited activity events are proposed: 1. Equipment delivery (i.e., rubber-tire loader and water truck). Water truck will arrive first to wet roads. The rubber-tire loader will be delivered on a flat-bed trailer and unloaded. Other passenger vehicle traffic will occur on the site that day, obeying the maximum speed limit of 15 miles per hour (mph). Water used from the existing site ponds for dust prevention will be filtered before use in the water truck or sprays. The water truck will remain on-site throughout the 500-ton event and will continue to be used as needed. 2. Material transfer from pile to tri-axle trucks via rubber-tire loader for removal from the site. Approximately 23 tri-axle truck will accomplish the 500-ton minimum removal. Equipment demobilization will be included in this event. 3. Site Maintenance Activities – Clearing of brush and road maintenance, as needed. Hanson has included this optional limited activity event since it is likely that refurbishment of site roads or clearing of brush at the site will be needed at some point in the near future. Emission Controls for Sources: Before the activity, Hanson or its representatives will inspect the site for road dust and relative conditions. The inspection will dictate the necessary actions to control emissions before any activity. Also, as part of Hanson’s required pre-task tailgate meetings, discussion points of dust control, visible emissions, asbestos, and procedure for internal notifications and corrective actions in the event that emission controls are not adequate will be discussed with all workers. As stated in Hanson’s Asbestos Monitoring and Mitigation Plan (AMMP) dated July 6, 2021, submitted to DEP, the control measures to be employed are as follows: 1. Hanson will use a state-of-the-art street sweeper to clean paved roads before other equipment arrives at the Quarry during and after each limited activity, if deemed necessary. 1 ATTACHMENT B LIMITED ACTIVITY EVENTS SAMPLING PLAN 2. All internal site roadways to be used during the limited activity will be adequately wetted using a water truck before any vehicle traffic, including delivery of the equipment (i.e., rubber-tire loader). 3. The storage pile(s) will be adequately wetted in the area where the material will be removed during the loading activity. 4. The material will be loaded into the truck and the minimum drop height possible. 5. Via the water truck or equivalent methods, additional water application will be completed as necessary if the newly exposed aggregate shows signs of dryness. 6. Tri-axle truck wheels will be washed off using the water truck spray or other equivalent method before exiting the site. 7. Tri-axle truck loads will be properly tarped before exiting the site. 8. Water will be applied to control dust by increasing the moisture content of the material. Increasing the moisture content will prevent dust from becoming airborne instead of suppression, which involves knocking down dust already airborne. Sequence of Air Monitoring During Limited Activity Events Hanson or its representatives will follow the air monitoring plan outlined in the AMMP. Before any activity starts, monitors will be set up at the same eight (8) locations identified in Hanson’s AMMP, which were used previously in the five (5) background sampling events conducted in 2021. Air sampling will be initiated before any activity starts in order to obtain the necessary air volume to obtain the required accuracy. Air monitoring will occur during the three (3) proposed limited activity events: during (1) site-staging, (2) the 500-ton removal event, and (3) maintenance activities. Wind Direction and Speed will be periodically recorded during all air monitoring events using a handheld instrument onsite and from the nearby Pennridge Airport. 1. Site Staging Air monitoring will be conducted when equipment is delivered to the Quarry and for the remainder of the day to obtain the necessary sample volume. No other activities will be conducted at the site until the results of the first monitoring event are received and submitted to DEP. After the results are reviewed and verified not to exceed the proposed corrective action thresholds, air monitors will be placed and started before removing the 500 tons of crushed aggregate from the site. 2. 500-ton Removal Event Following site staging monitoring and assessment, Hanson will remove 500-tons from existing stockpiles at the Quarry, which is expected to take one (1) day. Hanson anticipates that activities and sampling during this stage will occur 10-14 days following site-staging activities and related lab analysis. Site activities during this limited activity operations event will include the following: • Street Sweeper • Driving equipment at Quarry (rubber-tired loader, tri-axle trucks, water truck) • Use of equipment (i.e., material transfer from rubber-wheeled loader to tri-axle trucks) • Use of water truck to wet aggregate piles, site roads and wash off tri-axle tires 2 ATTACHMENT B LIMITED ACTIVITY EVENTS SAMPLING PLAN • Loading the rubber-tire loader onto the flat-bed trailer and demobilizing from the site. The rubber-tire loader will be washed off prior to loading and all truck tires will be washed off prior to leaving the site As noted above, unless required and approved in advance by DEP, Hanson’s activities will not include the crushing or processing of any aggregate materials, any blasting activities, or the use of drilling machinery. During removal of the 500 tons of material, an observer trained in the visible emissions method will monitor site work to determine if any visible emissions are generated during any of the activities. If visible emissions are noted, the operations will be temporarily halted, and additional control measures will be implemented as appropriate. Once the control measures are considered adequate, the operations will resume. 3. Site Maintenance An additional limited activity event that may need to occur consists of site maintenance work on quarry roadways or vegetation clearing. A full round of air monitoring would be completed during this limited activity event. Hanson will apply water to site roads and materials (i.e. crushed aggregate) as needed to prevent potential dust from becoming airborne in areas where maintenance activities are occurring. Hanson anticipates utilizing small skid-steer equipment to accomplish site maintenance. Note: If the results of air monitoring during any of the three (3) above-referenced limited activity events indicate an exceedance of the corrective action thresholds, the cause(s) will be investigated and corrective measures taken before subsequent activity commences at the Quarry. 3