Exhibit 96.1

CEMENTOS PACASMAYO S.A.A.

Technical Report Summary (TRS)

Tembladera Quarry

and

Pacasmayo Cement Plant

20-F 229.601 (Item 601)

January 2025

Index

Index of tables

Index of figures

Cementos Pacasmayo S.A.A (CPSAA) is a Peruvian company, whose corporate purpose is the production of cement and other products associated with the construction sector. This Technical Report Summary summarizes a Pre-feasibility study of the Tembladera quarry located in the Cajamarca Region and the cement plant located in La Libertad Regional, both owned by CPSAA. Cementos Pacasmayo’s qualified persons (QPs) prepared this Report to support disclosure of limestone Resources and Reserves.

The Tembladera quarry contains limestone, which is the main raw material for cement production. This quarry is located in the Yonan district of Contumaza province in Cajamarca Region. There is an access road to this quarry from Lima to Trujillo. The Cementos Pacasmayo plant is located at Kilometer 666 of the Panamericana Norte highway in the district and province of Pacasmayo in the region of La Libertad. The cement manufacturing plant is located 60 kilometers away from the Tembladera Quarry and 120 kilometers from the city of Trujillo.

The quarry is in the semi-arid climate of the region of the Andean lower level of northern Peru. Precipitation ranges from minimum values of 0 mm from June to September, to a maximum value of 26.3 mm in March. Temperatures throughout the year vary between 20°C from July to August, and 25°C in March. The maximum temperature is 27°C on average, but it can go up to 29°C (January - April). Minimum temperatures are around 15-17°C (July - September).

In the cement plant in Pacasmayo, the annual average temperature varies between 16.5 and 25.0°C. The monthly average temperature varies between 19 and 25°C. The annual relative humidity averages 85%.

Tembladera quarry is a limestone deposit, which is used to produce different types of cement for construction. The deposit is owned by Cementos Pacasmayo S.A.A.

In 2002, the National Institute of Cadastre and Mining Claims gave to Cementos Pacasmayo S.A.A., the title of non-metallic concession called “Acumulación Tembladera”, which goes back in time to the date of the oldest claim “North N° 1” granted by the Mining Regional Office of Cajamarca by Ministerial Resolution N° 267, dated June 30, 1950, in favor of Cementos Portland del Norte S.A., starting operations as Cementos Pacasmayo S.A.A. from 1957 to 2013.

The Calizas del Norte S.A.C. company (CALNOR) operated the mine from January 2014 to May 2016. The Tembladera quarry did not operate from June to September 2016. Afterwards, Cementos Pacasmayo hired San Martin Contratistas Generales S.A. to operate the mine, which they have done since October 2016.

CPSAA conducted a major exploration project in March 2007, which consisted of a drilling campaign. MINTEC, a consulting company, was hired to create the 3D model of the deposit and estimate Mineral Resources.

In 2019, another campaign of eight diamond drill holes was carried out, to confirm the Mineral Resources and the Reserves in the eastern part of the deposit. Interpretation of the information obtained was used to prepare a new geological model. Cementos Pacasmayo oversaw the interpretation.

In December 2022, Cementos Pacasmayo started a diamond drilling campaign of eight (8) drill holes to confirm Mineral Resources and Reserves. Drilling activities continue during the first month of 2023.

The deposit is contained within the so-called Cajamarca Formation, which belongs to the Upper Cretaceous (Turonian floor, around 90 MA). This formation overlies the Quilquiñan Group and underlies the Celendín Formation.

Sedimentary rocks corresponding to the Cajamarca Formation and the Upper Cretaceous Celendín Formation outcrop in the area.

On the other hand, the Cajamarca Formation is composed of thin limestones, well stratified, in strata of thin layers, with a coloration that goes from dark to light gray. It has a thickness of 230 meters.

Exploration activities at the Tembladera quarry were carried out in 2007 and 2019. The first diamond drilling campaign, in 2007, drilled 31 drill holes. In 2007, DCR Ingenieros S.R. Ltd determined the geotechnical guidelines of the Tembladera quarry and grouped them into seven (7) geotechnical zones. In 2019, the second diamond drilling campaign was carried out with eight (8) drill holes. In the same year, Walsh Peru S.A. carried out a hydrogeological study of the Tembladera quarry.

During 2021, Cementos Pacasmayo update of Hydrogeological studies in the Tembladera quarry was made; however, the works were office work. Likewise, the update of geotechnical studies on the stability of the pit slope and the waste disposal in the quarry. Those works involved sample collection and sample analysis to determine the rock strength, density, and other properties.

From December 2022 to early 2023, Cementos Pacasmayo drilled eight (8) more holes at the Tembladera quarry in order to confirm the Mineral Reserves.

Cementos Pacasmayo has implemented procedures for sample preparation, tests and security of the information on its operations. The cement plants and operations have been complying with ISO 9001 standards since 2015. The certification under this standard is renewed annually by means of an external audit.

With respect to the geology, CPSAA uses XRF characterization and other analytical methods to analyze the main chemical components in the limestone. In the cement plant, the raw materials for the production of clinker and cement are analyzed using methods specified in the ASTM. and Peruvian Technical Standards for cement testing. The laboratory in the cement plant has properly calibrated equipment and a periodic maintenance plan.

At the Pacasmayo plant, the sampling and data verification plan applies to the processes of receiving raw materials, crushing of raw materials, coal grinding, crude grinding, clinkerization and cement grinding. Additionally, it is applied to the lime production, lime grinding and lime dispatch.

Cementos Pacasmayo S.A.A. had implemented quality assurance, quality control (QAQC) protocols for the development of the exploration and production activities in the Tembladera quarry and in the Pacasmayo plant to ensure the quality of the information that is used in the estimation of Mineral Resources and Reserves.

Concerning geological activities, CPSAA has a data verification unit for the geological database. This unit has as its main function, the verification of data to be used in the estimation of Mineral Resources and Reserves. For the appropriate administration of information, internal protocols have been implemented that are subject to internal audits. The geologic data verification activities include data collection, administration and validation received from internal and external laboratories, data tracking through the confirmation of custody chains and finally, validation of data in the database. CPSAA staff use verified data in developing the Mineral Resources and Reserves model.

The qualified persons followed the defined processes for information flows to support Mineral Resource and Reserve estimation. The qualified person followed the same process as a means of verifying and validating the geologic data. They found that the validated information is congruent in the interpretations of the same, with which the fundamental base geological models were generated for the estimation of the Mineral Resources.

No findings have been found that could invalidate the estimation of the Resources and Reserves of the deposit.

For data verification activities at the cement plant, uses the Plan, Do, Check and Act (PDCA) methodology. This is applied to the technical information received from the company’s internal and external customers. The quality control laboratory compares the results with national and international laboratories as part of the verification procedures.

In the author’s opinion, the methodologies used for collecting and processing data at the cement plant are accurate and free of important errors. The information can be used within the models’ construction and estimates for cement production. Considering that the analyses of the main chemical components and physical properties of the raw materials and final products are made in external laboratories, the quality of the information is adequate for preparing mineral Resource and Reserve Estimates.

Cementos Pacasmayo has procedures for the development of products at the laboratory level and its scaling at the industrial level, as well as its own procedures for the preparation, review, issuance and control of laboratory test reports. Cementos Pacasmayo has a research and development laboratory located in the Pacasmayo plant to evaluate technical aspects of cement plant and quarry operations.

To have a representative sample of its raw materials and cement at the Pacasmayo plant, Cementos Pacasmayo performs the analysis of its samples in its internal Research and Development Laboratory located at the plant.

A significant percentage of Research and Development activities are focused on evaluating different ratios between clinker-mineral additions providing the best functional characteristics to our products and at the same time balancing the benefits generated for the company. Another objective is to identify other additions that can substitute for clinker: slag, pozzolana, fly ash, calcined clays, etc., to reduce its environmental footprint and the cost of cement production. Based on this work, the laboratory has determined (and confirmed with production estimates) that 1 tonne of limestone yields 0.76 tonnes of clinker and the clinker/cement factor of the main cements with additions is 0.71.

The Research Laboratory issues technical reports to the operations department following international standards. The operations department evaluates the convenience of implementing the tests industrially and validates what is reported at the laboratory level.

Qualified person (QP) has estimated limestone Resources and Reserves contained in this technical report summary (TRS). The evaluation uses, the information from exploration activities from previous years has been used, and is the database for the Resources and Reserves model.

The limestone Resources are presented in Table 1. The Resource estimation considered the quality restrictions of limestone received in Pacasmayo cement plant, limits of the concessions, accessibility to the Resources and legal restrictions of the mining concessions, and economic factors and modifying factors.

The minimum quality accepted is 48.6% CaO to be used as raw material for production and considering the sale prices of cement at the Pacasmayo plant, the economic evaluation used for Reserve evaluation is shown in Chapter 19 and considers the same criteria used for the estimation of Reserves.

Table 1 Mineral Resources (exclusive of Reserves) of Tembladera quarry

For Reserve estimation, the Mineral Resources and the quality criteria, modifying factors and limestone production costs were considered. The mining method used is open pit. The economic results are shown in Chapter 19.

Table 2 Mineral Reserves of Tembladera quarry

Cementos Pacasmayo S.A.A. is the current owner of the Tembladera quarry, which has outsourced its production to a specialized contractor. The limestone mining at the Tembladera quarry includes drilling, blasting, loading, hauling, and crushing.

Figure 1 Tembladera quarry mining sequence

The major equipment used for the production of limestone at the Tembladera quarry is a track drill, primary crusher, secondary crusher, excavator, tractor, front loader, and dump truck. Also, auxiliary equipment is necessary, including pickups, lubricator trucks, ambulance, and other equipment.

The mining plan of the Tembladera quarry considers an average annual production of 2.6 million tonnes of limestone for the next 30 years and a stripping rate of 0.20.

Based on the plant requirements and sales projection for the next 30 years, the pit design parameters for the Tembladera quarry are inter-ramp slope angle, bench slope, bench height, safety bench, width of ramps, safety berm height and ramp gradient.

Cement production considers the stages of raw material extraction, grinding and homogenization, clinkerization, cement grinding, silo storage and packaging, loading and transportation. Cement is moved through conveyor belts to packing systems to be packed in bags and then loaded onto trucks operated by third parties for distribution.

Figure 2 Pacasmayo plant process block diagram

The raw materials and additions are considered for cement production at Pacasmayo plant. The raw materials for cement production are limestone, sand, iron, clay and coal. The mixture of these raw materials is crude which is fed to the calcination kiln to produce clinker. The limestone represents 80% by weight of the raw material.

Clinker and additional materials are used to produce cement. The additions used in cement production are slag, pozzolana, gypsum and limestone. Currently, the cement plant in Pacasmayo has a Clinker/Cement factor of 0.71.

The Pacasmayo plant has an electrical substation with a capacity of 105 MVA, the electric power is supplied from the national grid.

Cementos Pacasmayo has implemented a preventive and corrective maintenance plan to keep cement production uninterrupted.

Cementos Pacasmayo maintains operational efficiency to control costs and operating margins, and makes efforts to diversify energy sources and ensure supply when possible.

The Peruvian Cement Market is geographically segmented by regions: northern, central and southern region and every region is served by different companies, most of which are cement producers.

The main companies that supply the cement market in Peru are Cementos Pacasmayo S.A.A., UNACEM, Cemento Yura, and Cementos Selva S.A.C. There are also companies that import cement or clinker, such as Cemento Inka, Cemento Nacional, and Cemex, among others.

The companies that commercialized cement in Peru follow the Peruvian Technical Standards associated with - technical specifications for cement.

Portland Cement is subdivided into Type I and Type V. Portland Cement is subdivided into Type ICO, Type IL, Type 1P and Type 1 (PM); and finally, Hydraulic Cements specified by performance are Type GU, Type MS (MH), Type HS, Type HE, Type MH and Type LH.

Cementos Pacasmayo, being the leading company in the production and sale of cement in the Northern Region, has a market share in the following cities: Cajamarca, Chiclayo, Chimbote, Jaen, Pacasmayo, Piura, Rioja, Tarapoto, Trujillo, Tumbes, Yurimaguas and Iquitos. Cementos Pacasmayo also has a Market Share above 92.1% in the northern region of the country.

Annual cement shipments at the national scale for the year 2024 reached a total of 12.0 million tonnes, while total cement shipments at the Pacasmayo plant for 2024 were 1,674.9 thousand tonnes. Pacasmayo plant meets almost 54.4% of the cement demand in the Northern Region of the country and its cement shipments represent 59.1% of the three cement plant’s overall shipments.

Table 3 shows the projected demand and price per ton of cement for the next 30 years.

Table 3 Projection of demand and price for the next 30 years

This document presents the cash flow analysis and an economic evaluation of the project based on the current operating costs of the cement plant in Pacasmayo and using limestone production information for the Tembladera quarry. For the Mineral Reserves evaluation, the general and macroeconomic assumptions used for the projection of the free/economic cash flows and for the valuation are:

The economic analysis uses the economic assumptions listed in Chapter 19. The main variables considered in the economic model for the sensitivity analysis were cement price, production cost and CapEx.

For the economic analysis of Reserves, the free cash flow is constructed, which does not incorporate the financing structure, since the latter is considered in the weighted average cost of capital of the company (WACC) for discounting future cash flows. The following financial parameters were calculated:

The cash flow of the project is presented in Table 4 below. The NPV at a discount rate of 10.79% is 2,268 million Soles.

Table 4 Free Cash Flow and valuation

Figures 3 and 4 show the sensitivity analysis, which shows the influence of changes in prices, OpEx, CapEx on NPV and EBITDA, respectively.

Figure 3 Graph of slopes of the variables on the Economic Value (expressed as %)

Figure 4 Sensitivity of EBITDA (expressed as %)

The Acumulación Tembladera property shares borders with private properties. No mining activities are being performed on these properties. The mining concession (EAGLE 1) overlaps with the Acumulación Tembladera property by 46.43 hectares; however, Cementos Pacasmayo owns the surface property; consequently, this concession does not restrict the Cementos Pacasmayo’s activities in the current exploitation areas. Eagle 1 does not interfere with Cementos Pacasmayo S.A.A.’s operations, Resources or Reserve estimates. Also Julissa A concession does not interfere with the area of the mining rights in the Cementos Pacasmayo S.A.A. concession.

Table 5 Resource Categorization (exclusive of Reserves) at the Tembladera quarry

Table 6 Mineral Reserves expressed in millions of tonnes

This Technical Summary Report (TRS) was prepared for Cementos Pacasmayo by qualified persons (QPs) who work for Cementos Pacasmayo, who according to their qualifications and experience developed the chapters based on their expertise. Likewise, the aforementioned QPs used the Company’s information sources, information validated and approved by the competent authorities in Peru and public information sources. Table 7 indicates the qualified persons who prepared this document as well as the chapters and information under their responsibility.

Marco Carrasco, who holds the position of Project Manager of Cementos Pacasmayo and is certified by the Mining and Metallurgical Society of America (MMSA) of the United States as a QP, served as the supervising QP. He acted as Project Manager, whose primary role was to compile the information received from the QPs of each chapter to have an integrated document. Each QP is responsible for the section they wrote.

This technical report summary was prepared as an exhibit to support disclosure of Mineral Resources and Reserves by Cementos Pacasmayo. This report summarizes the results of the Prefeasibility study of the “Acumulación Tembladera” property for the production of limestone using open pit mining methods. The report is effective December 31, 2024.

The limestone extracted from the Acumulación Tembladera property supplies raw material for the Pacasmayo plant where cement is produced. The annual limestone production is 2.6 million tonnes per year (Mtpy). Actual operating costs have been considered for the estimates and used as a basis for economic projections within the economic analysis. This technical report summary estimates Mineral Resources and Reserves according to the regulations published in Securities Exchange Commission (SEC) Form 20-F and under subpart 1300 of Regulation S-K.

The report was prepared by the qualified persons listed in Table 7 using available studies and, in some cases (see Chapter 25), relying on information provided by Cementos Pacasmayo, the registrant.

Table 7 List of Cementos Pacasmayo S.A.A. QPs

Unless otherwise indicated in the report, all currencies are in soles and all measurements and units are in the metric system. The Tembladera Accumulation property is represented by Universal Transverse Mercator (UTM) coordinates. All coordinates referenced in this report and in the accompanying figures, tables, maps and sections are provided in the WGS84 coordinate system, UTM 17S zone, unless otherwise indicated.

The information used is sufficient to allow this TRS to be completed with the level of detail required by Regulation S-K subpart 1300. The information used included exploration results from all the drilling campaigns, actual information from Cementos Pacasmayo’s operations, information submitted to and approved by the corresponding authorities and public information in organizations specialized in the cement industry. The list of sources of information is presented in Chapter 24 of this report.

The QPs who developed this document visited the Tembladera quarry and Pacasmayo plant as part of their activities for 2024.

Table 8 QP’s field visit

This Technical Report Summary (TRS) updates the previously filed technical report summary for the property. The previously filed TRS is the “Technical Report Summary (TRS), Tembladera Quarry and Pacasmayo Cement Plant 20-F 229.601”, which was filed as Exhibit 96.1 of the CPSAA’s Annual Report on Form 20-F filed with the SEC on April 29, 2024 (File No. 001-35401).

We refer to the non-metallic mining concession called Acumulación Tembladera. The mentioned mining property is located in the area of Tembladera, in the district of Yonan, province of Contumaza, Cajamarca region.

The quarry is located 60 km from the Pacasmayo district, Pacasmayo province, La Libertad region, where the cement plant is located. Consider the UTM coordinate of the center of the circle of the Acumulación Tembladera as follows:

Table 9 Central coordinates of the Acumulación Tembladera property

The area of the property is 3,390.97 hectares and is shown in Figure 5. The mining rights (the mining concession title) are granted by INGEMMET (Geological Mining and Metallurgic Institute) of the Energy and Quarries Sector by means of a Presidential Resolution. In the particular case of the Acumulación Tembladera, the Director’s Resolution N° 01989-2002-INACC/J the State Organization that granted that title was the National Institute of Concessions and Mining Cadastre (Instituto Nacional de Concesiones y Catastro). Cementos Pacasmayo S.A.A has surface rights for the operation area in the Tembladera quarry.

The mineral rights were issued based on the General Mining Law (DS-014-92-EM) and its Regulation D.L 020-2020-EM.

The property is in the name of Cementos Pacasmayo S.A.A., is also registered with the name Acumulación Tembladera, and with type of substance NON-METALLIC.

Cementos Pacasmayo S.A.A. pays the right of validity for the concession of Acumulación Tembladera with unique code 010001801L. These payments must be made from the first business day of January to June 30 of every year. Cementos Pacasmayo S.A.A. pays royalties to the State according to regulations established by the Authority in Law N° 28258 and its amendment N° 29788, for the property called Acumulación Tembladera.

Figure 5 Acumulación Tembladera Concession

The cement plant property is located in the Pacasmayo District, Pacasmayo Province, La Libertad Region. It is located at Kilometer 666 of the Panamericana Norte.

The property is shown in the Figure 6 and Table 10 shows the UTM coordinates of the center of the circle of the Pacasmayo plant:

Table 10 Central coordinates of the Pacasmayo cement plant

The area of the property is 86.7 hectares. The property is registered in the National Superintendence of Public Registries (Superintendencia Nacional de los Registros Públicos – SUNARP) under the registration number 11004542 in registry zone No. V TRUJILLO, Registry Office San Pedro de Lloc.

Cementos Pacasmayo S.A.A. pays taxes to the State according to that established by the Municipal Authority, for the Pacasmayo plant.

Figure 6 Pacasmayo Industrial Plant map

This chapter describes the accessibility, climate, local resources and infrastructure for the Tembladera quarry and Pacasmayo plant. The chapter uses information obtained from technical and environmental studies prepared by specialized companies and approved by the authorities.

Topography

Tembladera is located between 500 and 1000 masl. The topography shows steep surfaces and abrupt slopes. Drainage is dendritic and controlled by structural features; all the streams are tributaries of the Jequetepeque River.

Access

The main access is by land. The journey from the city of Lima to the Tembladera quarry is as follows: Lima – Pacasmayo (666 km), Pacasmayo – Ciudad de Dios (14.3 km), Ciudad de Dios – Tembladera (50 km) and Tembladera – Checkpoint (0.8 km), for a total of 747.1 km.

By air route is as follows: Lima – Trujillo in 1 hour flight, and from Trujillo to Tembladera quarry by land route for a journey of 2 hours.

Another alternative by air route is as follows: Lima – Chiclayo, in approx. 1:15 hrs flight, and from Chiclayo to Tembladera by land route with a journey of 2.5 hrs.

Climate

The Tembladera quarry is located in the western slope of the Andes Mountains range of the Cajamarca Region. The climate is characteristic of semi-arid areas of the lower Andean floor of northern Peru.

Meteorological information is administered by the National Service of Meteorology and Hydrology, SENAMHI. The precipitation data from the Monte Grande Meteorological Station has minimum values 0 mm from June to September and maximum values of 26.3 mm in March, corresponding to the dry and wet periods of the year. The total annual precipitation averages 64.6 mm.

Temperature

The average monthly temperature fluctuates from 20 °C in July and August to 25 °C in March. The monthly thermal amplitude is less than 4 °C. The maximum average temperatures range from 27 °C to 29 °C (January – April), and the minimum temperatures range from 15 – 17 °C (July - September).

Physiography

The quarry area is located in northern Peru between the transition of the coast and the mountain range, a region characterized by hilly mountainous relief, cut by rivers and streams creating cultivated valleys and watercourses, where the current morpho-dynamic processes show a moderate to low activity, except during periods of the El Niño Phenomenon. The property groups physiographic units into three morphological classes: plains, mountains and hills and one class originated by human activity.

Local resources and infrastructure

The personnel of the quarry are divided into Cementos Pacasmayo S.A.A. and contractor personnel. Additionally, the quarry is located 5 kilometers from the Tembladera town, where there are local resources for a population such as housing, schools, hotels, electrical infrastructure, water supply, internet access, etc. The contractor accesses the Tembladera quarry by pickup trucks and buses.

The national electricity grid is the source of energy for the Tembladera quarry. A water channel supplies the Tembladera quarry with water, which is authorized by the National Water Authority (ANA).

Topography

The area is located in the alluvial pampas, with elevations between 25 and 100 masl., consisting of extensive variety of conglomerate material that represent ancient dejection cones of the Cupisnique, Jequetepeque, Las Viejas, Zaña and Reque rivers. In general, these pampas are desert-like and are practically free of crops; they are equal to the high terraces created by the rivers in the area.

The continuity of these pampas is interrupted by the trenches eroded by the modern rivers. It is common to find minor terraces on the flanks of the valleys, especially in the inland sectors, such as the Jequetepeque valley.

The coastal morphology consists of an almost continuous line of ravines, interrupted only by the narrow valleys of the main rivers. The ravines are 20 to 50 meters high, almost vertical, consisting of conglomerate material belonging to the ancient dejection cones. The beaches are very narrow.

Access

The main access is by land. The journey from the city of Lima to Pacasmayo (682km). By air route is as follows. Lima – Trujillo, 1 hour flight, and by land route 1.5 hours from Trujillo to Pacasmayo. Another alternative by air route is Lima – Chiclayo, 1 hour flight and from Chiclayo to Pacasmayo 1.5 hours by land route.

Climate

Temperature: This coastal zone has average annual temperatures between 16.5 and 25.0 ºC. The average monthly temperature ranges from 19 to 25 °C, based on data from the Meteorological Station of Cementos Pacasmayo S.A.A.

Precipitation: The area has very low precipitation for the most of the year, having an annual average of less than 10 mm.

The annual average Relative Humidity is 85%.

Atmospheric Pressure: The atmospheric pressure fluctuates from 1017 hPa to 1013 hPa in the period of November 2006, with a daily average of 1009 hPa. These pressure values are related to the influence of the South Pacific Anticyclone.

Sunshine is high at midday in summer, with an average of 7 hours of solar rays per day. In the winter, the sunshine decreases to 3.5 hours of solar rays, although it is worth noting that there are clouds that allow the diffuse radiation to pass through.

Local resources and infrastructure

The personnel of the plant are divided into Cementos Pacasmayo S.A.A. and contractor personnel. The cement plant is located next to Pacasmayo town where most of the personnel live. They are taken from Pacasmayo to the cement plant in buses provided by Cementos Pacasmayo.

Electricity is supplied by the national grid and there is a contract with Electro Perú, which supplies energy through a 60 KV transmission line.

Water supply at the Pacasmayo plant is provided by a groundwater well.

Tembladera quarry is a limestone quarry mining limestone that is suitable for different types of cement. The quarry and deposit are owned by Cementos Pacasmayo S.A.A. By means of Director’s Resolution No. 01989-2002-INACC/J dated on November 4, 2002, the National Institute of Cadastre and Mining Concessions granted to Cementos Pacasmayo S.A.A., the title of the non-metallic accumulation concession called “Acumulación Tembladera” with code No. 01-00018-01-L, whose antiquity goes back to the date of its oldest integral concession: “Norte No. 1” granted by the Regional Mining Headquarters of Cajamarca by Ministerial Resolution No. 267 of June 30, 1950, in favor of Cementos Portland del Norte S.A., starting operations as Cementos Pacasmayo S.A. from 1957 to 2013, the year in which Calizas del Norte S.AC.(CALNOR) was constituted. CALNOR started activities from January 2014 to May 2016. San Martin Contratistas Generales S.A. started activities from October 2016 to the present.

In March 2007, MINTEC Consulting Company was hired by Cementos Pacasmayo to perform the 3D modeling of the deposit and a preliminary estimation of the Mineral Resources. The geological information was obtained from 31 diamond drill holes. The samples obtained were analyzed in internal and external laboratories to obtain the content of CaO, MgO, Al₂O₃, SiO₂, Fe₂O₃, SO₃, Cl and CO₃.

With the information generated, the geological interpretation was made and the structures which control or dominate the deposit were defined. The geological model was completed by Cementos Pacasmayo’s QPs in the MineSight software from vertical sections.

In 2019, a campaign of eight (8) diamond drill holes was carried out to confirm the Mineral Resources and Reserves of the east area of the deposit. With the interpretation of information obtained, a new geological model was prepared. Cementos Pacasmayo oversaw the interpretation and the geologic modeling.

In December 2022, Cementos Pacasmayo started a diamond drilling campaign of eight (8) additional drill holes to confirm Mineral Resources and Reserves. Drilling activities continued during the first month of 2023.

In 1957, Compañia Cementos Pacasmayo S.A. began operations in the Pacasmayo plant by installing the first clinker line, which had an installed production capacity of approximately 110,000 metric tons per year.

In 1966, CPSAA added a second clinker line of 150,000 metric tons per year, increasing the installed clinker production capacity.

In 1974, Cementos Norte Pacasmayo S.A. (CNP) was created to transfer gradually the shares to the Peruvian State.

In 1976, a third clinker line was added, increasing the installed clinker production capacity to 540,000 metric tons per year.

In 1994, CPSAA installed a new computerized process control and optimization system in the Pacasmayo plant, and the Management approved the expansion of the practical clinker production capacity from 540,000 metric tons per year to 690,000 metric tons per year. In 1995, CNP upgraded the third kiln technologically, allowing it to increase its capacity to 840,000 metric tons per year of clinker.

On December 10, 1998, a significant milestone was reached in our company’s history. Cementos Pacasmayo S.A.A. was born due to the merger between Cementos Norte Pacasmayo, Cementos Selva (formerly Cementos Rioja), and Cordasa. This strategic move not only solidified our position in the market but also paved the way for our continued growth and success.

In 2023, we completed a significant investment in a more efficient kiln for our Pacasmayo plant. This strategic move underscores our unwavering belief in our country’s future growth and, more importantly, our steadfast commitment to environmental sustainability. The new kiln, designed to significantly lower our emissions, is a testament to our dedication to carbon neutrality.

The strata of the district of Yonan, province of Contumaza, Cajamarca region consists of Cretaceous Age sedimentary strata of the Quilquiñan Group, Cajamarca Formation, Celendín Formation, and Recent Quaternary Deposits (Table 11).

Table 11 Regional stratigraphic column

Quilquiñán Group (Ks-q).

The Quilquiñán Group is composed of the Romirón and Coñor formations which together are represented by 100 to 200 m. of shales and marls with some calcareous intercalations.

The Quilquiñán Group overlies the Pulluicana Group and underlies the Cajamarca Formation. Both contacts are concordant. It varies from a thickness of 120 m., in the Chongoyape quadrangle, to a known maximum of 281 m. in the Tembladera area (Cerro de Chepen).  The group consists of dark gray friable shales and bluish marls in thin layers weathering to dark brown or reddish brown. The Quilquiñán Group is fossiliferous and contains a varied fauna of ammonites, lamellibranchs and echinoidea. BENAVIDES V., (1956) dated it to the Late Cenomanian-Early Turonian interval because of its ammonite content.

Cajamarca Formation (Ks-c).

The Cajamarca Formation is composed of 100 to 400 m. of limestone whose main outcrops are located in the Cutervo, Chota and Celendín quadrangles. The Cajamarca Formation is characterized by regular and uniform stratification and grayish or whitish colors.

The formation is limited by concordant contacts with the Celendín Formation in the upper part and with the Quilquiñán Group at the base. In both cases these are sharp contacts with abrupt lithology changes. The Cajamarca Formation has a fairly uniform lithology throughout the region. It consists of a thin, pure, light brown limestone weathering to whitish or light gray. The limestone is well stratified in thin to medium layers.

A nearly complete section at Tembladera (Cerro de Chepén) is 111 m thick. (BENAVIDES V., 1956). The Cajamarca Formation is characterized by the content of Coilopoceras newelli BENAVIDES, from the late Turonian (BENAVIDES, V. 1956); therefore it correlates with the upper part of the Jumasha Formation, from other parts of northern and central Peru.

Celendín Formation (Ks-ce).

The Celendín Formation outcrops only in the Cutervo, Chota and Celendín quadrangles generating a relief of hollows and low terrains characterized by yellowish and brownish tones produced by weathering. The formation concordantly overlies the Cajamarca Formation. The Celendín Formation is composed of thin layers of clayey nodular limestone, intercalated with marls and shales. In general, the marls and shales predominate over the limestones. The ammonites contained in the Celendín Formation indicate that the unit belongs to the Coniacian and early Santonian (BENAVIDES, B. 1956). The Celendín Formation correlates with other outcrops of the same unit in the north and center of the country and with the top of the Chota Formation in the Selva region.

Recent Quaternary Deposits.

Along the coastal strip and the Andean foothills, there are abundant alluvial and fluvial deposits made up of conglomerates, gravels, sands, silts, etc. forming the floors of the valleys and ravines located between San Pedro de Lloc, and Motupe, where the main population centers and farming areas of the area are located. (Source: Bulletin No. 38 Series A. National Geological Chart by John Wilson - 1,984).

The Tembladera quarry hosts a limestone deposit with a grade suitable for cement production. The deposit is contained within the so-called Cajamarca Formation, belonging to the Upper Cretaceous (Turonian floor, around 90 MA). This formation overlies the Quilquiñan Group and underlies the Celendín Formation.

Sedimentary rocks corresponding to the Cajamarca Formation and the Upper Cretaceous Celendín Formation outcrop in the area as described below. This formation overlies the Quilquiñan Group, and underlies the Celendín Formation.

Mesozoic

Quilquiñán Group (Ks-q).

Composed by a thin stratification of marly shales, thin layers of marly limestones, and marl nodules in thin layers, dark brown in color, it is not mineable. This formation is the limit of the Cajamarca Fm. limestones. Which represents the oldest rocks in the area, they are found outcropping in the northern part of the area of the quarry.

Cajamarca formation (Ks-c)

Composed of thin limestones, well stratified, in strata of thin layers, with a color ranging from dark to light gray, these limestones are mined for cement production because they meet quality standards. This formation lies concordant with the Quilquiñan group. The average strike of these strata is N 75° W and dip varies from sub-horizontal to 50º. It has a thickness or power of 230 meters.

Celendín formation (Ks-ce)

It presents an interstratification of thin layers of light gray limestones, cream to dark brown nodular marly limestones and shales. This formation outcrops on the south-central side of the quarry, in a reduced area, with a thickness of 35 meters, which underlies concordant to the Cajamarca Fm. These types of limestones were considered as waste rock for not complying with the quality standards.

Cenozoic

In the quarry, intrusions of andesitic dikes of plutonic formation can be found, which intrude longitudinally in very localized areas of the limestone deposit rock mass. These dykes present aphanitic to porphyritic texture, with some plagioclase crystals visible in greenish gray to whitish matrix, showing moderate to high alteration, moderate poly directional fracturing degree.

Quaternary Deposits

Along the Andean foothills there are abundant alluvial and fluvial deposits made up of conglomerates, gravels, silty sands, etc. In the Tembladera quarry area, these deposits are restricted to the Jequetepeque riverbeds, stream mouths and some terraces.

Table 12 Local stratigraphic column of the Tembladera quarry

Table 13 shows the main characteristics of the deposit.

Table 13 Characteristics of the Tembladera deposit

Figure 7 Geological Section of the Tembladera quarry

Cementos Pascamayo’s exploration activities at the Tembladera quarry property involve diamond drilling to adequately characterize the geology. The holes range in depth from 80 to 150, with an average depth of 120.

Table 14 Drilling campaigns in Tembladera quarry

In 2024, Cementos Pacasmayo did not conduct further hydrogeological studies. The last hydrogeological studies were conducted in 2021 and the information was presented in the previously filed TRS titled “Technical Report Summary (TRS), Tembladera Quarry and Pacasmayo Cement Plant 20-F 229.601”, which was filed as Exhibit 96.1 of the CPSAA’s Annual Report on Form 20-F filed with the SEC on April 28, 2022 (File No. 001-35401).

As stated in the previous TRS, Cementos Pacasmayo hired Magma Consulting S.A.C. in 2021 to update its previous hydrogeological surveys. The hydrogeological study included the evaluation of 5 piezometers. Magma Consulting S.A.C. concluded that the groundwater is 300 m above the current topographic elevation. Figure 8 shows the water table relative to ground surface (Magma Consulting S.A.C. 2021).

Figure 8 Water level at the Tembladera quarry

As per the previous TRS, CPSAA hired Walsh Perú S.A. to define the hydrogeological characteristics of the quarry. Their study (Walsh Perú S.A., 2009), which included evaluation of EC, TDS, S, pH, and T from 13 monitoring points. The evaluation concluded there is no water contamination from the current mining practices.

Cementos Pacasmayo did not conduct further geotechnical studies in 2024. The update studies were conducted in 2021 and the information was presented in the previously filed TRS titled “Technical Report Summary (TRS), Tembladera Quarry and Pacasmayo Cement Plant 20-F 229.601”, which was filed as Exhibit 96.1 of the CPSAA’s Annual Report on Form 20-F filed with the SEC on April 28, 2022 (File No. 001-35401).

As per the previously filed TRS, the geotechnical studies concluded, based on the geotechnical test work that the current slopes at the Tembladera quarry are stable for static and pseudo-static loading conditions, with safety factors above the minimum recommended for operating conditions. The studies also recommended geotechnical design criteria including a single bench height of 10 m, inter-ramp angles between 35° and 45°, with berm widths ranging from 5.04 m to 6.40 m. The recommended bank angles is between 47° and 70° and bench angles is between 47° and 70°.

This Chapter describes the preparation, analysis and security of the samples used for the geology, quarry and cement plant operations.

Cementos Pacasmayo S.A.A. has implemented international standards in all its operations such as quarries and plants. The ISO 9001 standard has been implemented and certified since 2015. The certification is renewed annually through an external audit.

The SSOMASIG department (Security, Occupational Health, Environment and Management Systems), is part of the team that determines and gives the necessary support for the maintenance of the ISO 9001 (Quality) and the scope is in all the company’s activities.

The Geology department has protocols for the activities of sample preparation methods, quality control procedures, security and other activities.

Samples obtained from the drill holes are placed in holders to be duly coded, cut, bagged and sent to the laboratory at the Pacasmayo plant and are occasionally sent to an external laboratory following the company’s procedures.

Certimin S.A. is used as an external laboratory for chemical analysis. Certimin S.A. is a Peruvian laboratory that is certified in ISO 9001, ISO 14001, ISO 45001, NTP-ISO/IEC 17025 Accreditation and has a membership in ASTM. This laboratory has modern facilities for the development of mining services associated with the cement industry and technical support in the geochemical field for national and international companies.

For the limestone samples, the laboratory analyses evaluate CaO, MgO, Al₂O₃, SiO₂, Fe₂O₃, SO₃ and Cl. Once received in the laboratory, the properties of the limestone to be used in cement production are analyzed.

Cementos Pacasmayo S.A.A. has developed quality assurance procedures, which guarantees the accuracy of the results in the sampling, in the preparation and analysis of the samples.

Cementos Pacasmayo S.A.A. has implemented QAQC protocols for the development of exploration and production activities in the Tembladera quarry to ensure the quality of the information that allows the estimation of Mineral Resources and Reserves of the deposit.

Based on the information and samples from the 2019 drilling campaign where limestone samples were obtained, Cementos Pacasmayo S.A.A. performed an audit for the validation of results as part of the quality assurance and quality control (QAQC) activities. For this purpose, it hired the Wiracocha Mining Services S.R.L., who conducted a re-sampling of a group of drill holes executed in Tembladera quarry in the past. Also, the work included the revision of the QAQC program. The samples and controls of this program were analyzed at Certimin S.A., an external laboratory.

The analysis of the results obtained for the different samples and controls inserted show a confidence level, with an acceptable bias that are within the standards of the sampling theory, which guarantees the accuracy of the results in the initial sampling, so it is concluded that both the preparation and analysis of the samples obtained initially in the laboratory of Cementos Pacasmayo S.A.A., has reliable processes and procedures.

The quality plan implemented by Cementos Pacasmayo for the quarries includes the insertion of blanks, duplicates and standards, in order to control the precision, accuracy and contamination in the samples (Table 15).

Table 15 Quality Plan of the Tembladera quarry

Cementos Pacasmayo S.A.A. has implemented QAQC protocols for the development of exploration and production activities in the Tembladera quarry in order to ensure the quality of the information that allows the estimation of Resources and Reserves of the deposit.

Cementos Pacasmayo S.A.A has a specific area for the storage of the samples obtained during the drilling campaigns; the samples are properly stored to preserve their quality.

The necessary materials for storage and transport of the samples were implemented. Sampling cards were also implemented with information on the name of the project, name of the borehole to be sampled, date of sampling, sampling interval, sampling manager, sampling and type of sample or control sample.

All samples were labeled, and a photographic record is available. The photographic record of each sampling bag is made together with the weighing of the sample.

Cementos Pacasmayo has implemented actions to ensure the physical security of samples, data, and associated records. The traceability of the sample from its generation to its analysis and subsequent conservation of rejects and pulps. At the Tembladera quarry, core samples are duly stored in the coreshack.

In the author’s opinion, Cementos Pacasmayo has been complying with the international standards of ISO-9001 (Quality) since 2015 and implemented Quality Assurance and Quality Control (QAQC). Cementos Pacasmayo S.A.A. has used a QAQC check program comprising blank, standard and duplicate samples. The QAQC shipping rate used complies with accepted industry standards for insertion rates, as well; the actual sample storage areas and procedures are consistent with industry standards.

Protocols in the different exploration and production processes are strictly complied with. There is information on sample preparation methods, quality control measures, sample security, and these results are accurate and free of significant error. The information in this report is adequate for use in the construction of the Geological Model, Resource Estimation and Reserve Estimation.

Cementos Pacasmayo S.A.A. has a quality control plan for each of its operations that is part of the quality system.

As part of the quality control plan (P-CC-D-03 VE 05 Quality control - cement and lime), samples of raw materials such as limestone, sand, clay and iron are evaluated in the laboratory at the Pacasmayo plant, where they are analyzed to determine the chemical composition of each material for cement production.

The procedures applied are the chemical analysis of raw materials and raw meal, sampling of clinker, slag and pozzolana, physical testing of cement, chemical analysis by wet route for clinker and cement, preparation of coal samples, physical testing for additions, analyses and operating procedures in the X-ray area, which are based on ASTM, NTP (Peruvian Technical Standard) and ISO standards.

For preparation of samples, it is considered the collection and preparation of samples procedure, which consists of primary and secondary crushing, and reduction of the sample by the quartering method, then the sample is pulverized in the ring mill.

The laboratory at Pacasmayo plant has implemented the ISO 9001 standard; also, it has calibrated equipment, with a calibration and maintenance program established by the laboratory area. The main equipment in the laboratory at Pacasmayo plant are the XRF fluorcence equipment and the compressive strength press, which are maintained annually.

The tests for air content, fineness, autoclave expansion, compressive strength and setting time and vicat are made for all types of cements. The autoclave contraction, 14-days mortar expansion, 6-months sulfates expansion, SO₃, MgO, loss on ignition, insoluble residue and C₃A and 2 C₃A+ C₄AF tests only apply to some specific cements.

Table 16 describes the sampling plan and frequency of tests and data verification (P-CC-D-04 VE 09) for the processes of raw material reception, raw material crushing, coal milling, raw meal milling, clinkerization, cement milling, lime production, lime milling and lime dispatch.

Table 16 Tests and frequency for each stage of the process

The quality plan implemented by Cementos Pacasmayo for the cement plants includes the insertion of blanks, duplicates and standards, in order to control the precision, accuracy and pollution in the samples. Table 17 shows the QAQC plan for the Pacasmayo plant.

Table 17 Quality Plan of Pacasmayo cement plant

In 2024, CPSAA evaluated 03 blank samples, 1261 duplicate samples, and 20 standard samples in the Pacasmayo Plant. The results show the precision and accuracy are below the error limits. As part of the quality plan, the laboratory evaluates its performance through external interlaboratory; in this sense, the laboratory participates in 02 interlaboratory:

Likewise, quality assurance procedures include control of finished products, control of non-conforming products, validation of silos, density analysis, QAQC program, quality plan and Quality control parameters for raw materials received at the Pacasmayo plant.

Cementos Pacasmayo S.A.A. has implemented QAQC protocols for the development of cement production activities at the Pacasmayo plant, to ensure the quality of the information that allows the estimation of the Mineral Resources and Reserves of the deposit.

Sample preparation methods are sample collection and preparation, clinker, slag and pozzolana sampling and coal sample preparation.

The testing procedures are: Chemical analysis of raw meal and raw materials, analysis by X-ray equipment, X-ray laboratory operation, physical tests for additions, physical chemical analysis for coal samples, physical tests for cement, wet testing of clinker and cement and quality plan.

Likewise, the control parameters are raw material parameters, pozzolana, slag, mineral reception parameters, clinker production parameters, raw material parameters for raw meal, raw meal feed parameters, raw meal milling parameters, coal milling parameters and cement milling parameters.

Cementos Pacasmayo S.A.A. has a Quality Assurance, Research and Development area that ensures compliance with the requirements for finished products specified in Peruvian Technical Standards, which are traceable to the standards of the American Society for Testing and Materials (ASTM).

For quality assurance, the control parameters have been defined from the raw materials, products in process and finished products. Compliance with the requirements based on indicators of the quality assurance management system for the 2024 period is 0% of nonconforming products in the market. This is evaluated under the specification of Standards NTP 334.009, NTP 334.090, and NTP 334.082 (similar to ASTM C150 and ASTM C1157). Likewise, the level of customer satisfaction (D-COM-P-01 VE10 Customer satisfaction) is 91.97%.

In this sense, in the author’s opinion, the quality assurance system at the Pacasmayo plant, which includes preparation methods, procedures, analysis and security, complies with the best practices in the industry, thus ensuring that the final customer has confidence in the quality level of the products marketed by Cementos Pacasmayo. The QAQC is adequate for Mineral Reserves estimation.

This Chapter shows the data verification activities for the geology, quarry and cement plant areas.

CPSAA has a unit specialized in the compilation, standardization and verification of information to be loaded into the geological database. Its main function is the administration and validation of the data to be used in the estimation of mineral Resources and Reserves. For the proper management of the information of the database, internal protocols have been implemented, which are subject to internal audits.

The data collection applies to exploration activities and quarry operations.

For diamond drilling, the process flow for planning and executing drilling, survey methods for reporting drill collars and ddh / verification of the quality of information and recovery process of the core information. In addition, for geological sampling activities, the processes flowsheet, validation and consistency of sample information, sample preparation and testing, density, registration process and digital photographic storage are used.

For quarry operations, it applies to the sampling of detritus from the blast holes and rock chips.

The stages for management and validation of database are the recovery, processing and storage of the database. The database validation includes database development process flow, information standardization and integration process, information storage strategy, appropriate database technology, structure and practicality of the database system that allows a fast and flexible access and input of information and validation of chemical results, which includes the QAQC report.

The consistency between the database records and the original registry was verified by the QPs in 2024. No differences were detected between the database and the log files. A digital copy of all records is kept as a pdf file. Digital certificates support the chemical analysis data.

The collection of the information considered the following: drill collars, survey, lithology, photographic record, samples and assays.

Collar, Survey, Lithology and chemical analysis data were imported and processed with MX-Deposit software (By Seequent).

The results indicated that the database had adequate integrity for Resource estimation. This software verifies that the data entered from each sample or reported by the external laboratory is correct for input into the Resource model.

The team followed the defined processes for information flows to support Resource and Reserve estimation. The qualified person followed the same process as a means of verifying and validating. It has been found that the validated information is congruent in the interpretations of the same, with which the fundamental base geological models were generated for the estimation of the Resources.

No findings have been found that could invalidate the estimation of the Resources and Reserves of the unit.

Data for each hole was individually checked in the database to confirm accuracy.

The reviews included:

Typical errors may impact reserve and resource estimation related to discrepancies in original data entry. These errors may include:

Data validation follows the field operational procedures that collect information from the source (collar, survey, lithology, samples, and assays).

Finally, when the information is transmitted and uploaded to the mining software for geological modeling and estimation, it is double-checked to eliminate any additional errors.

The qualified persons followed the defined processes for information flows to support Resource and Reserve estimation. The qualified person followed the same process as a means of verifying and validating the geologic data. They found that the validated information is congruent in the interpretations of the same, with which the fundamental base geological models were generated for the estimation of the Resources.

No findings have been found that could invalidate the estimation of the Resources and Reserves of the unit.

The Quality Control Plan consists of the following: PDCA cycle, customer, person in charge, activities, risks, control methods, monitoring, measurement, analysis, evaluation and documentary evidence.

The PDCA cycle is:

The XRF analysis, chemical analysis and physical analysis are made to verify the results of the samples, as part of the Quality Control Plan.

The data resulting from these three types of analysis are recorded and evaluated - to determine whether or not they comply with the technical specifications.

Data verification procedures include internal audits, check lists, statistical tables, reports, validation of data, certificates, interlaboratory test reports and compliance with quality protocols.

Cementos Pacasmayo S.A.A. through its quality assurance and control unit participates in evaluations with international laboratories such as CCRL/ASTM (Concrete and Cement Reference Laboratory), which is an international reference laboratory for construction materials, and Xamtec of Colombia, an international interlaboratory, in order to report reliable data.

The Quality Control laboratories endorse their analysis methods by participating in interlaboratory analysis programs, which compare the results with national and foreign laboratories. The methods of analysis compared are X-ray fluorescence (XRF) and the physical cement tests, which are the methods used to control cement quality. In all the results of these interlaboratory programs, the companies always obtain the best results for each test.

In the author’s opinion, the methodologies used for collecting and processing data at the cement plant are accurate and free of important errors. The information can be used within the models’ construction and estimates for cement production. Considering that the analyses of the main chemical components and physical properties of the raw materials and final products are made in external laboratories, the quality of the information is adequate for preparing mineral Resource and Reserve Estimates.

Cementos Pacasmayo S.A.A. has a Quality Assurance and Research and Development department. The objective of the department is to develop, evaluate and research procedures for the development of products at laboratory level and their scaling up to industrial level. Another objective is to identify supplementary cementitious materials (SCM) that can substitute for clinker: slag, pozzolana, fly ash, calcined clays, etc., to reduce their environmental footprint and the cost of cement production.

They have also implemented their own procedures for the preparation, review, issuance and control of test reports associated with cement production.

Cementos Pacasmayo has implemented the ISO 9001 standard since 2015. The Research and Development laboratory, located at the Pacasmayo plant, is responsible for technical aspects of cement plant and quarry operations.

Cementos Pacasmayo applies the procedures:

A permanent control is carried out with other laboratories to give greater reliability to the results. Likewise, interlaboratory reports are obtained from external laboratories such as CCRL (Cement and Concrete Reference Laboratory), which is an international reference laboratory for construction materials, and Xamtec from Colombia, an internal interlaboratory.

Cementos Pacasmayo S.A.A. has also obtained the certification that certifies compliance with Supreme Decree No. 001-2022, which validates compliance with the Technical Regulation on Hydraulic Cement used in Buildings and General Construction.

Cementos Pacasmayo SAA opted for the highest and most rigorous certification model (Type 5) granted by ICONTEC, which has extensive experience in the certification of products and services.

A significant percentage of Research and Development activities are focused on evaluating different ratios between clinker-mineral additions that provide the best functional characteristics to our products and at the same time keep balance with the benefits generated for the company. Whether it is a requirement or an internal initiative oriented to supply any previously identified need, the laboratory tests are developed with the objective to generate an operational advantage to the company. Based on this work, the laboratory has determined (and confirmed with production estimates) that 1 tonne of limestone yields 0.76 tonnes of clinker and the clinker/cement factor with
additions is 0.71.

The R&D Laboratory located at the Pacasmayo plant provides analysis and research services to all of the company’s cement plants.

At the Pacasmayo plant, the studies conducted in the Research and Development Laboratory and the Quality Control department include: reduction of the clinker/cement factor, substitution of slag for pozzolan, and substitution of fossil fuels for rice husks, the latter at the Rioja plant. The clinker/cement factor of the main cements with additions is 0.71.

The substitution of slag from blast furnace by natural pozzolanic materials was also analyzed, with the objective of improving the company’s carbon footprint and reducing operating costs. The main test was the analysis of pozzolanic activity at laboratory level and subsequently at industrial level. By 2025, the objective is to further reduce slag consumption and further reduce CO₂.

The Research Laboratory issues technical reports following international standards for the operations area, identifying the correct data, defining the requirements that may vary but include accuracy, consistency and validity through an evaluation of the data and implementation of solutions, and finally, validating the adequacy of the data.

The operations area then evaluates the convenience of industrially implementing the tests and validating what is reported at the laboratory level. The integrity and adequacy of the data reported by the area is based on the technical competencies of the collaborators as well as the high scores obtained in the external interlaboratory of recognized entities such as XAMTEC and CCRL in their different programs.

The geological model was developed and structured using Leapfrog software. The model solids were generated considering the lithology of the deposit based on the geological characteristics and its quality.

Due to the nature of the deposit and its stratified nature and occurrence, the geological model was interpreted with the help of 56 E-W cross sections and 82 N-S sections, spaced every 20 meters.

Additionally, in the interpretation with the sectioning, a structural analysis has been considered defining a main NE-SW fault system whose effect on the terrain has been reflected in the displacement of blocks related to fault jumps of normal and inverse nature.

The geochemical analysis of the samples from the diamond drilling campaigns was performed by the geologists of Cementos Pacasmayo S.A.A., which has allowed grouping the calcareous stratigraphic sequence into 15 lithological groups or domains, establishing the following sequence to be considered in the geological modeling.

The lithological units have been grouped by assigning a numerical code to each, in the mining software, to simplify the modeling. Table 18 shows the lithological units with their respective Mine Sight code and numerical code.

Table 18 Lithologic units of the Tembladera quarry geological model

The main criteria used for geological modeling are the lithological and quality aspects.

The lithological criteria are based on the macroscopic physical characteristics, such as color, texture, hardness, etc., of the calcareous rocks.

In relation to the quality criteria, the main reference is the content of calcium oxide (CaO) as the main oxide, and of economic interest, as well as the concentration of oxides and secondary elements and/or contaminants were also considered in classifying the type of rocks oriented to the final product.

In the Tembladera quarry, the reference cut off of the content of oxides that determine the classification of the final products of calcareous rock is shown in Table 19.

Table 19 Pacasmayo plant material restrictions

The block model was configured based on the dimensions and spatial distribution of the bodies containing the material of economic interest. Table 20 shows the extents of and dimensions of blocks in the block model (coordinates in UTM units).

Table 20 Characteristics of the block model

A total of 890 samples from 47 diamond drill holes were used for the Resource estimation.

The data is managed in a database. From there, it is extracted and loaded into MineSight (by Hexagon) and used for resource estimation.

The density data for the estimation of the limestone Resources of the Tembladera quarry as of December 2023, were taken from the historical data of sampling results carried out in the first drilling campaigns, the density varies between 2.69 and 2.72 t/m³.

In general, each geological unit is estimated from the information of the composites belonging to that unit, the composites should not cross “hard” boundaries between different geological units, and in this case units were established according to the quality.

The objective of compositing is to have uniform grades in each initial core, to reconstitute the grade profile of each drill hole. This means that when compositing we must be careful that the composites preserve the original nature of the sample. The calculated values considered in the compositing were for the SiO₂, Al₂O₃, CaO, MgO and SO₃.

Composites were made at different lengths to determine the optimum compositing size. The optimum value was 10 m. This size, which best fits the nature of the original sample, was included in the resource estimation process.

In addition, the length of the composites is considered based on an exact multiple of the height of the blocks used to model the deposit and is also matched to the bench height to be processed.

Table 21 shows the results of the basic statistics of the main oxides as CaO, SiO₂, MgO, Al₂O₃ and SO₃ content for the original data and for the composited data. The statistical analysis was performed for each defined body with the interpretation of deposit quality, which were also taken as criteria for modeling and estimation.

Table 21 shows the statistics for “Limestone Cal” as this is the one of greatest economic interest due to its CaO content and the main one in the estimation of Resources and Reserves.

Table 21 Limestone Cal statistics

Extreme values are those analysis results that are not representative of the unit being studied and are those that are above the mean plus twice the standard deviation.

In the analysis of the extreme values from the laboratory results for the calcareous lithologic units being estimated, no significant deviations were found that would alter the estimation results; the results are consistent and representative considering the geological nature of the horizons to which they correspond.

The variographic analysis considered the composited data for each level corresponding to each body of economic interest of the Tembladera quarry; the variographic structures found indicate preferential directions in the correlation of the results, which allows us to analyze the spatial behavior of the variables, mainly of the CaO variable.

This has allowed us to obtain resulting experimental variographic structures that reflect the maximum distance or maximum range and the way in which one point has influence on another point at different distances.

Table 22 Variogram modeling parameters

The Ordinary Kriging Interpolation (OK) method was used for the main CaO variable, of Inverse Distance (ID2) for the secondary variables (Oxides, see Table 25) and Nearest Neighbor (NN) for validations, defining parameters for each estimator. Tables 23 and 24 show the main parameters used to define the interpolations of the main CaO variable of the CAL limestone layer and of the secondary variables, respectively.

The interpolations were performed in 3 consecutive processes.

Regarding the number of composites, we used a minimum of 2 per block and 5 as maximum, for the first interpolation and a minimum of 1 per block for the second and third pass with 3 and 5 as maximum, respectively.

Additionally, a maximum of 02 composites were considered for each borehole taken in the interpolation.

Table 23 Estimation Parameters Secondary Variables

Table 24 Estimation Parameters CaO

The geological modeling of the limestone deposit of the Tembladera quarry has been modeled considering the quality and geological characteristics of the calcareous horizons, such interpretation was made based on the diamond drill holes carried out in the drilling campaigns, the relationship between the information and the geological model is consistent.

Mineral Resource estimates are effective December 31, 2024. The point of reference for all Mineral Resources estimates is as quantities at [delivered to the] cement plant. For the estimation of Mineral Resources, the content of CaO was considered, in addition to the content of impurities. The impurities are restrictions determined by the cement production plant. Table 25 shows the quantity of Resources and the average values of their quality.

Table 25 Resource estimates (exclusive of Reserves) at the Tembladera quarry

For the determination of Resources, the costs of extraction, transportation, cement processing and cement dispatch were considered to determine the Resources. The cost estimate considers the increase in distances, which vary from 5.6 kilometers to 5.9 kilometers from the quarry to the plant and operating costs in the open pit during the 30 years of evaluation. Since the stripping or overburdens is 0.2 and is consider in the economic model.

The costs are based on real sources of current operations of Cementos Pacasmayo S.A.A. and the selling price of cement during 2025 (479.5 S/. x t). Chapter 18 and 19 shows the costs and prices for the determination of Mineral Resources. The main factor for the determination of Resources is quality. The Tembladera quarry is a sedimentary deposit in that sense the model for the estimation of Resources has considered the Tembladera quarry as a unit, whose limestone production is carried out by 10 m banks.

The evaluation of mineral resources has considered other modifying factors such as limestone production costs, cement sales prices and the environmental and social viability of our operations.

From an environmental and social point of view, Cementos Pacasmayo has been carrying out activities in Peru for more than 60 years and is recognized as a Peruvian company with a high reputation. Therefore, environmental and social viability is expected to continue.

The inclusion of a new diamond drilling campaign in the eastern part of the pit (in production) is allowing us to identify the resources, understand the geology of the deposit associated with the andesitic dike structures and has also allowed us to reclassify the Indicated Resources to Measured Resources and the Inferred Resources found in that area of the deposit to resources of greater certainty.

It is important to complete the geological evaluation of the deposit in order to define the resources globally.

The parameters for Resource classification used by Cementos Pacasmayo S.A.A. were obtained from the experience of calculating the optimum drilling grid for sampling by geostatistical methods. Additionally, the variographic analysis was considered taking as reference the variogram range. After considering all these, resource classification was based on the following criteria:

From this basic configuration, several configurations have been defined, taking into account the number of holes and the average search distance. Other factors used for Mineral Resource estimation are the maximum number of composites used per block and the number of drill holes for each block, as shown in Table 23.

The geological modeling of the limestone deposit at the Tembladera quarry has been based on the quality and geological characteristics of the calcareous horizons. This interpretation was carried out based on the diamond drilling carried out during the drilling campaigns. The relationship between the information and the geological data of the model is consistent.

The revision of the model for this report has been based on the geological update of the calcareous horizons modeled considering the last drilling campaign, which has generated modifications of the solids due to the better sizing of the andesitic dikes. Data related to the progress of production and the update of the new topographic production base are also taken into account.

No fundamental changes have been considered in the estimation plans or strategies, such as interpolation ranges or distances that could considerably modify the resource model.

The resource estimate of the Tembladera quarry has been developed following the best standards and modeling and estimation techniques of the mining industry.

The total estimated Mineral Reserves in the Tembladera quarry are 80.2 M tonnes which are detailed in Table 26 in their different classes.

In the periodic update of the Reserves of the Tembladera quarry, the Reserves produced within the update of the Resources and Reserves models are taken into account, along with any changes to assumptions about “modifying factors” or the change and entry of any new information if it had been generated.

The quality metric used in the Mineral Resources and Reserves estimation is the calcium oxide (CaO) content. It is a stable variable in the deposit, which develops in specific ranges depending on the lithological domain, and are characterized according to the strata or horizons as they were deposited, with varying degrees of concentration.

Based on the revised Mineral Resources model, the Mineral Reserves model was also updated with which the new design of the production pit was made and elaborated.

The Mineral Reserves estimated in the limestone deposit was 75.3 M of proven Reserves with 49.85% of CaO and 4.9 M of probable Reserves with 50.59% of CaO for a total of 80.2 M of Reserves that support the mining plans for its production and the supply to Cementos Pacasmayo S.A.A. plants.

A LOM of 30 years has been calculated for the quarry. This based on the estimated Reserves and the plant’s limestone consumption projection for the following years, provided by the management and financial control area, and is incremental until 2044 and fixed consumption thereafter.

The criteria used for the determination of Mineral Reserves are described below.

ROM is all material produced in the quarry that complies with the specifications and will be sent to the plant for cement production. For determining ROM tonnage, dilution is considered negligible. The recovery in the quarry was assumed to be 100%.

The limestone received at the Pacasmayo plant is properly stored and then mixed with other raw materials to obtain the raw meal feed (kiln feed). The use of limestone in the formulation of the raw meal is an average of 80%. After the crude is obtained, it is fed to the calcination kiln to obtain clinker. Finally, the clinker is mixed with additions to obtain cement.

For the determination of the Mineral Reserves, the costs of extraction, transportation and cement processing, including the quality restrictions of the raw material, were considered. The costs are based on actual sources from the current operations of Cementos Pacasmayo S.A.A. in Tembladera quarry and Pacasmayo plant. Chapter 18 shows the costs to determine the Mineral Reserves.

The quality restrictions for limestone at the Pacasmayo cement plant are Al₂O₃, CaO, MgO, SO₃ and SiO₂. These restrictions are used for Limestone Type I, Limestone Type V, Limestone Type Cal and Limestone Type Adición.

From the quality point of view, the cut-off grade for limestone is 48.6% CaO and from the economic point of view, the results are shown in Chapter 19.

The economic analysis for the estimation of Mineral Resources and Reserves is presented in Chapter 19. Reserves are expressed in millions of tonnes and are shown in Table 26.

Table 26 Mineral Reserves expressed in millions of tonnes

The Reserves calculated for the quarry from the Mineral Resources consider the risk factors and modifying factors within which the quality factors are considered as the most sensitive ones that by their nature can affect the Reserves. Although the main variable is CaO, which is very stable in the deposit, there are others that determine the quality of the Reserves and could even affect the process if they are not adequately controlled, such as the SO₃ content.

In the process of calculating Reserves, and in the quarry production plans, these variables have been adequately considered in the mining plan; properly sequenced, and with blending processes.

In addition to quality factors, ore reserves could change from operating performance-controlled production costs, allowing for maximization of the use of resources in the extractive processes for the use of resources in the extractive processes for the industrialists, guaranteeing the LOM of the quarry.

Cementos Pacasmayo S.A.A. is the current owner of the Tembladera quarry. The production of the quarry has been outsourced to a specialized contractor, San Martin Contratistas Generales S.A., who conducts limestone mining activities. Cementos Pacasmayo S.A.A. supervises the quarry to verify the activities and production according to the requirements of the Cement plant.

The mining method is open pit mining, which consists of mining in a series of benches with pit expansion possible both vertically and laterally. At Tembladera, mining generally proceeds top-down with a bench height of 10 meters and no more than 3 working benches open simultaneously. The materials are loaded by 3 excavators and transported to the primary crusher or waste dump by 10 trucks.

The transported material passes through the primary crusher, which reduces the fragments to a size of less than 4”. The crushed limestone is accumulated in 2 piles to separate the products and/or ease the following secondary crushing operation, which is generally carried out for limestone lime-type, bringing the granulometry of that limestone to less than 45 mm.

The secondary crusher only processes limestone destined for lime production, after which the product is screened using meshes of size 24 mm, 12 mm and 8 mm. The two coarse products are used for lime and the fine product is used as raw material for Type V cement. As a request of Pacasmayo cement plant, the secondary crusher is processing Type I limestone (Size <1/2”).

Figure 9 Tembladera quarry mining sequence

The mining of limestone at the Tembladera quarry includes the following unit operations:

Drilling is mainly done with 1 hydraulic drill. The work is done in two 12-hour shifts with 20 effective hours and 4.0 hours of operational and non-operational delays.

The Blasting fragments the rock to a suitable size for efficient loading, hauling and crushing operations. The operation mainly uses ANFO and Booster as the blasting agent, and non-electric detonators are used to mitigate vibration and sound.

After blasting, the Quality Control staff delimits the zones according to the results of blast hole sampling to define the material destinations. The excavators then load the material into trucks, which transport it to the assigned destination (waste dump or crusher).

The purpose of crushing is to reduce the size of the rock as a result of blasting to the size required by the plant. The quarry has 2 types of crushers:

Primary Crusher

The Primary crusher, which is an Allis Chalmers 7”, is used to reduce the ROM limestone to sizes less than 4” at an average crushing rate of 700 tonnes/hour. After the primary crushing, the material is separated in two hoppers depending on the type of material and its granulometry.

Secondary Crusher

The secondary crusher, which is a Symons 5 1/2, reduces limestone sizes further to less than 45 mm at an average of 130 tonnes per hour. The limestone then passes through screens and is classified into 3 sizes of 45mm-25mm, 25mm-12.5mm and 12.5mm-8mm. As a request of Pacasmayo cement plant, the secondary crusher is processing Type I limestone (Size <1/2”).

The main equipment used to carry out mining activities at the Tembladera quarry are shown in Table 27 and Table 28 shows the auxiliary equipment.

Table 27 Main equipment of the Tembladera quarry

Table 28 Auxiliary equipment of the Tembladera quarry

The stability study prepared by DCR Ingenieros S.R. Ltd in 2007 was used until 2020. The slope stability study established 10 zones within the deposit. For the period from 2021 and onwards, the update made by Magma Consulting S.A.C. shown in Tables 29 and 30 will be applied.

Table 29 Parameters of design according to geotechnical zonification

It is recommended to have a bench for each 150 m of slope, this bench should be at least 10.5m wide and for blocks 1, 2, 3 and 4 it should be at 602 m above sea level.

Table 30 Reviewed Safety Factor 2021

In 2021 the hydrogeological study was conducted by Magma Consulting S.A. and based on the hydrogeological interpretation, basin morphology, lithology, piezometric levels, recharge and discharge zones, and piezometry, groundwater is at a depth of 300 m with respect to the topographic elevation of the Tembladera quarry.

The limestone production achieved as of December 2024 is 1,722,804 tonnes and 196,352 tonnes of waste rock was removed, which gives a stripping ratio of 0.11. Based on the plant requirements and sales projection for the next 30 years, the pit design parameters for the Tembladera quarry are presented in Table 31.

Table 31 Summary of Tembladera quarry design parameters

Considering that the cement plant demands an average annual production of 2.7 million tonnes per year of limestone, the plan for the following 30 years is shown in Table 32.

The proposed mining plan for the next 30 years is presented in Table 32.

Table 32 Mining plan for the next years