Exhibit 96.3

CEMENTOS SELVA S.A.C.

Technical Report Summary (TRS)

Tioyacu Quarry

and

Rioja Cement Plant

20-F 229.601 (Item 601)

Exhibit 96

Cementos Selva S.A.C. (CSSAC), a wholly-owned subsidiary of Cementos Pacasmayo S. A.A., 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 the Pre-feasibility study of the Tioyacu quarry located in the San Martin Region and the Rioja plant located in the same region, both owned by CSAAC. Qualified persons (QPs) from Cementos Pacasmayo have prepared the report to support the Resources and Reserves Estimates.

The Tioyacu quarry contains limestone, a non-metallic mineral that is primarily used as raw material in cement production. This quarry is located in the district of Elías Soplin Vargas, Rioja Province, San Martin Region. The access route to this quarry is by land through the Fernando Belaunde Terry highway. The cement plant located in the city of Rioja is adjacent to the Tioyacu quarry.

The vegetation is evergreen with lianas and vines, many of which are covered by epiphytes of the Bromeliaceae family. The forests have a very heterogeneous floristic composition.

The climate in this Amazon region in northern Peru is mainly influenced by the following factors: the Intertropical Convergence Zone (ITCZ), the presence of the Eastern Cordillera of the Andes and the Extratropical Fronts.

On February 6, 1998, the public auction of the Rioja Cement Plant was held, and Consorcio Pacasmayo was awarded the contract. To comply with the terms of the auction, Consorcio incorporated and subsequently transferred ownership of the plant to Cementos Rioja S.A. The award mentioned above included, by public deed dated April 8, 1998, the non-metallic mining concession “Calizas Tioyacu.” The Tioyacu quarry began operations as Cementos Rioja S.A. in 2000.

As historical information about the quarry, a campaign of 460 meters of drilling was carried out in 05 drill holes located in the eastern flank of the “Tioyacu” limestone-dolomitic massif executed by the company Andes Diamantina S.R.L., at the end of 1982 into early 1983. The objective was to determine the feasibility of a new portland cement plant in the region of San Martin. The exploration study identified significant limestone material suitable for cement manufacturing.

In 2015, Cementos Selva S.A. commissioned Geosym Consultores S.A.C. to carry out prospecting work through drilling. A total of 6 mixed drill holes were drilled, conveniently located and distributed along the Tioyacu quarry: 2 drill holes in the southern sector, 03 drill holes in the central area, and 1 drill hole in the northern sector, to geologically evaluate the deposit and know its conditions at depth. These 6 drill holes drilled during that campaign in conjunction with blast hole information and geological evaluation work allowed the CSSAC to update its Mineral Resources and Reserves.

From 2018 to the present, Cementos Selva S.A., with the help and support of mining software such as Leapfrog and Minesight, has developed the updated estimates of its Mineral Resources and Reserves at the Tioyacu quarry.

On March 1, 2022, Cementos Selva S.A. changed its corporate name to Cementos Selva S.A.C. (CSSAC).

From October to November, 2023, the Rioja plant stopped its operations because of a general power outage in the area.

In December 2023, Cementos Selva started a diamond drilling campaign of 6 drill holes to confirm Resources and Reserves.

On 2024, no blasting activities were carried out from May to September in the Tioyacu quarry due to delays from the authority for permits. In November 2024 CSSAC carried out diamond drilling at the Tioyacu quarry in order to update the quarry’s mineral resources and reserves.

The strata of the district of Elias Soplin Vargas, province of Rioja, San Martin region consists of Paleozoic/Mesozoic Age sedimentary formations of the Mitu Group, Pucara Group, Chambara Formation, Celendín Formation, Aramachay Formation, Condorsinga Formation, Ipururo Formation, and Quaternary Deposits.

Cementos Selva S.A.C. did not carry out any exploration activities at the Tioyacu quarry during the current year. The exploration activities described in section 1.3 describe the exploration work at the Tioyacu quarry till date.

In 2024, Cementos Selva carried out a drilling campaign at the Tioyacu quarry in order to confirm Mineral Resources and Reserves.

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

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

Cementos Selva S.A.C. has implemented QAQC protocols to develop exploration and production activities in the Tioyacu quarry and Rioja plant to ensure the quality of the information used for estimation of limestone Resources and Reserves.

With respect to the geology, CSSAC 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.

On the other hand, the Rioja plant, through its Quality Assurance and Control department, has implemented a sampling and data verification plan, which applies to the processes of receiving minerals, crushing of materials, drying of raw materials, grinding of raw meal, clinkerization, grinding of cement and cement packaging

Concerning geological activities, CPSAA has a data verification department for the geological database. The main function of this department is 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 (and CCSAC) staff use verified data in developing the Mineral Resources and Reserves model.

For data verification activities at the cement plant, CCSAC 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.

Cementos Pacasmayo has procedures for developing products at the laboratory level and scaling at the industrial level (including at Cementos Selva S.A.C. operations). It has guidelines for preparing, reviewing, insurance, and controlling laboratory test reports. Cemento Pacasmayo has a research and development laboratory located in the Pacasmayo plant to evaluate the technical aspects of cement plants and quarry operations.

At the Pacasmayo plant, the studies conducted in the Research and Development laboratory and the Quality Control department include the substitution of fossil fuels for rice husks at the Rioja plant. The main objective of the substitution of fossil fuels is the reduction of CO₂ or greenhouse gas emissions. In 2024, CSSAC used 3,272 t of alternative fuel (measured as coal equivalent) in the Rioja plant. This result represented 7.10% of the 8,853 t of CO₂.

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 0.77 tonnes of clinker and the clinker/cement factor of the main cements with additions is 0.74.

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.

Cementos Pacasmayo’s QPs developed the estimates of limestone Resources and Reserves contained in this technical report summary (TRS). The evaluation uses information from exploration activities carried out until 2023.

Table 1 shows the limestone Resources. The result of the estimation of Resources considered the quality restrictions of limestone received at Rioja plant, accessibility to the Resources and legal limits inherent to the mining concessions, and relevant economic and technical factors.

The minimum quality accepted is 51% CaO to be used as raw material for production. Considering the selling prices of cement at the Rioja plant, the economic evaluation used for the estimates of Resources and Reserves is shown in Chapter 19.

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

The Reserves calculation considered the Mineral Resource estimates and the quality criteria, relevant modifying factors, and limestone extraction costs.

The mining method used is open pit mining. The financial results are shown in Chapter 19. Table 2 presents the Mineral Reserve estimates.

Table 2 Mineral Reserves of Tioyacu quarry

Cementos Selva S.A.C., a wholly-owned subsidiary of Cementos Pacasmayo S.A.A, is the current owner of the Tioyacu quarry. Cementos Selva S.A.C. carries out the planning, production, supervision and quality control of the quarry to verify the activities and production according to the requirements of Rioja plant.

Figure 1 Tioyacu quarry mining sequence

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

The mining plan of the Tioyacu quarry considers an average annual production of 0.4 million tonnes of limestone for the next 26 years.

Based on the plant requirements and sales projection for the next 26 years, the pit design parameters for the Tioyacu quarry are inter-ramp bench slope angle, bench height, safety bench and width of ramps.

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

The raw materials for cement production are Limestone, Sand, Iron, Clay, Coal. The mixture of these raw materials is raw meal and is fed to the calcination kiln to produce clinker.

Limestone represents 74% by weight of the raw meal. Anthracite coal is also used as part of the raw material for the production of clinker. Clinker and additions are used to produce cement. The additions used in cement production are slag, pozzolana, and gypsum. Currently, the cement plant in Rioja has a clinker/cement factor of 0.74.

The Rioja plant has an electrical substation with a capacity of 12 MVA. Rioja plant uses electric power, which is supplied from the national grid.

Cementos Selva has implemented a preventive and corrective maintenance plan for equipment to prevent interruptions to cement production. Additionally, operating efficiency controls costs and operating margins.

The Peruvian cement market is geographically segmented by regions: north region, central region and south region. Diverse companies supply each region.

The main companies that comprise the cement market in Peru are: Cementos Pacasmayo S.A.A., UNION Andina de Cementos S.A.A., Yura S.A. and Cementos Selva S.A.C. Additionally, there are companies that import cement or clinker, such as Caliza Cemento Inca S.A., Distribuidora Cemento Nacional S.A.C., CEMEX Perú S.A., and Cal & Cemento Sur S.A., amongst others.

Companies that market cement in Peru follow the Peruvian Technical Standards associated with cement technical specifications.

The types of cement produced by the main cement companies of the country are Type I, Type V, Type ICO, Type IL, Type GU, Type MS (MH), Type HS, Type HE, Type MH.

Cementos Pacasmayo, a leading company in the production and sales of cement in the North Region, has market presence in the following cities: Cajamarca, Chiclayo, Chimbote, Jaén, Pacasmayo, Piura, Rioja, Tarapoto, Trujillo, Tumbes, Yurimaguas and Iquitos. The company has a Market share of over 92.1% in the north region of the country.

For Cementos Selva S.A.C. the overall shipments of the Rioja plant for 2024 were 318 thousand tonnes. It supplied 10.3% of the country’s North Region cement demand, and its cement sales represented 11.2% of the three cement plant’s overall shipments.

Table 3 shows the projected demand and price per ton of cement for the next 26 years.

Table 3 Projection of demand and price for the next 26 years

This document presents the cash flow analysis and an economic evaluation of the project based on the current operating costs of the Rioja plant and using limestone production information for the Tioyacu 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 considers the same evaluation criteria for estimating Resources and Reserves, considering that the Tioyacu quarry is one location using the same infrastructure and mining methods. The main variables considered in the economic model for the sensitivity analysis were cement price, production cost, and CAPEX. The free cash flow is constructed for the economic analysis, which does not incorporate the financing structure. The latter is considered in the weighted average cost of capital of the company (WACC) to discount future cash flows. The following financial parameters were calculated:

Table 4 presents the cash flow of the project. The NPV at a discount rate of 10.79%, is 525 million soles.

Table 4 Free Cash Flow and valuation

Figures 2 and 3 show the sensitivity analysis, which shows the influence of changes in prices, operating costs, and capital costs on NPV and EBITDA, respectively.

Figure 2 Sensitivity of Net Present Value (expressed as %)

Figure 3 Sensitivity of EBITDA (expressed as %)

The Calizas Tioyacu borders to the north of the Cementos Selva S.A.C concession is the Rioja 2 concession owned by Cementos Selva S.A.C; to the east of the mining concession is the Rioja 4 concession owned by Cementos Selva S.A.C, to the southwest is the Rioja 3 concession owned by Cementos Selva S.A.C

Table 5 Mineral Resources (exclusive of Reserves) of Tioyacu quarry

Table 6 Mineral Reserves of Tioyacu quarry

This Technical Summary Report (TRS) was prepared for Cementos Selva by qualified persons (QP’s) who work for Cementos Selva and 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 shows 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 Selva, a wholly-owned subsidiary of Cementos Pacasmayo SAA. This report summarizes the results of the Pre-feasibility study of the “Calizas Tioyacu” property for the production of limestone using open pit mining methods. The report is effective December 31, 2024.

The limestone produced from the Calizas Tioyacu property supplies raw material for the Rioja plant, located in the city of the same name, Cementos Selva produces cement. The annual limestone production is 0.4 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 Tioyacu quarry is located within the boundaries of the WGS84 two-dimensional geographic coordinate reference system, in the UTM 18S (Universal Transverse Mercator) zone. All coordinates referenced in this report and in the accompanying figures, tables, maps and sections are provided in the WGS84 coordinate system, UTM 18S 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 the various drilling campaigns with the exception of the 2024 campaign, actual information from Cementos Selva’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 QP’s who developed this document visited the Tioyacu quarry and the Rioja 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), Tioyacu Quarry and Rioja Cement Plant 20-F 229.601”, which was filed as Exhibit 96.3 of the CPSAA’s Annual Report on Form 20-F filed with the SEC on April 29, 2024 (File No. 001-35401).

The quarry is located in Elías Soplin Vargas District, Rioja Province, San Martin Region close to the Rioja plant.

The Peruvian State granted the mining right to Cementos Selva S.A.C. to carry out exploration and production activities that allow non-metallic minerals found in the subsurface through the granting of mining concessions. The mining rights registered with the authority, Instituto Geológico Minero y Metalúrgico (INGEMMET) are as follows Moyobamba 98, Pajonal 2, Rioja 1, Rioja 2, Rioja 3, Rioja 5, Rioja 6, Rioja 7, Rioja 8, Rioja 9, Calizas Tioyacu, Arcillas el Pajonal, Pajonal 3 and Pajonal 4. The area of the mining property is 9,600 hectares.

The mining rights (the mining concession title) are granted by INGEMMET of the Energy and Mines Sector through a Presidential Resolution. It is determined to include the mining rights in the Rioja Economic-Administrative Unit (UEA).

On March 15, 2016, by Presidential Resolution No. 0140-2016-INGEMMET/PCD/PM, the competent authority granted to Cementos Selva S.A.C the Rioja Economic-Administrative Unit (UEA), with code No. 01-00005-04-U of Cementos Selva S.A.C. These mining rights included 15 mining concessions.

Table 9 UEA Rioja Concessions

On February 09, 2022, by Report No. 1003-2022-INGEMMET/DCM/UTM, the competent authority has notified the exclusion of the Rioja 4 concession with code 10158296 from the Rioja UEA with code No. 01-00005-04-U.

The UEA Rioja is conformed by the following concessions:

Table 10 UEA Rioja Concessions

Table 11 shows the UTM central coordinates of the Rioja Economic Administrative Unit (UEA).

Table 11 Central coordinates of the UEA Rioja property

In accordance with this, the Rioja UEA includes fourteen (14) non-metallic mining rights covering 9,600.00 hectares, in favor of Cementos Selva S.A.C., owner of said rights; located in the Districts of Rioja / Awajun / Elias Soplin Vargas / Nueva Cajamarca / Posic, Province of Rioja and department of San Martin.

Cementos Selva S.A.C. complies annually with the payments for the rights to the UEA Rioja concessions. These payments must be made from the first business day of January to June 30 of each year, CSSAC provides the financial entities in charge of receiving the payments with the SINGLE CODE (see Table 10) of its mining rights, to comply with its obligation.

In the case of Rioja concessions, the payment is equivalent to US$3 per hectare. Likewise, Cementos Selva S.A.C. pays royalties to the State as established by the Authority in Law N° 28258 and its amendment N° 29788.

Figure 4 UEA Rioja map

The Rioja plant is located in the district of Elías Soplin Vargas, province of Rioja, San Martin region; on land owned by the Company that occupies a total area of 28.16 hectares, duly registered in File No. 4273, Electronic Record No. 05004085 of the Land Registry of Moyobamba, Registry Zone No. III, Moyobamba Headquarters. Table 12 shows the UTM coordinate of the centroid of the Rioja plant.

Table 12 Central coordinates of the Rioja plant

According to the Organic Law of Municipalities (Law 27972), Cementos Selva S.A.C. must pay the annual property tax for the property described above.

Figure 5 Rioja plant map

Cementos Selva S.A.C. is an industrial company dedicated to the production of cement. Its Tioyacu quarry provides limestone as raw material for cement production.

The Tioyacu quarry is geographically located in the district of Elías Soplín Vargas, province of Rioja, department of San Martín, approximately 14.46 km from the city of Rioja.

Topography

The study area consists mainly of hillsides with slopes ranging from 25% to more than 75%, terraces of alluvial origin, with slopes of less than 8% and slightly undulating, and small hillsides. The Tioyacu quarry has an average altitude of 900 meters above sea level.

Vegetation

The vegetation is evergreen with lianas and vines, many of which are covered by epiphytes of the Bromeliaceae family. The forests present a very heterogeneous flora composition.

Access

By air is from Lima – Tarapoto in a 1.5 hour flight, and by land from Tarapoto to Tioyacu quarry for a journey of 3 hours.

Access to the Tioyacu quarry is via the Fernando Belaunde Terry highway, which crosses the district of Elías Soplin Vargas from south to north.

Climate

The climate in this Amazon region in northern Peru is mainly influenced by the following factors: the Intertropical Convergence Zone (ITCZ), the presence of the Eastern Cordillera of the Andes and the Extratropical Fronts.

Physiography

The study area has landforms that have been generally classified as large plains landscape and mountainous landscape (mountain slopes).

Local Resources

The Tioyacu quarry is operated by Cementos Selva S.A.C personnel. The quarry is located 13.7 kilometers from the town of Rioja, which has the resources of a city.

Power is supplied by the 60 kV Rioja - Nueva Cajamarca transmission line owned by Electro Oriente.

The company has a water use license for industrial purposes, with its water catchment point located in the Tioyacu River. The National Water Authority issued the authorization R.A. Nº 100-2010-ANA-ALA ALTOMAYO.

On February 6, 1998, the public auction of the Rioja plant was held, and Consorcio Pacasmayo was awarded the contract. To comply with the terms of the auction, Consorcio incorporated and subsequently transferred ownership of the plant to Cementos Rioja S.A. The award mentioned above included, by public deed dated April 8, 1998, the non-metallic mining concession “Calizas Tioyacu.” The Tioyacu quarry began operations as Cementos Rioja S.A. in 2000.

At the end of 1982 and beginning of 1983 a campaign of 460 meters of drilling was carried out in 05 drill holes located in the eastern flank of the “Tioyacu” limestone-dolomitic massif executed by Andes Diamantina S.R.L. The objective was to determine the feasibility of a new portland cement plant in the department of San Martin. The exploration study identified limestone suitable for cement manufacturing.

In 2015, Cementos Selva S.A.C. commissioned Geosym Consultores S.A.C. to carry out prospecting work through drilling. A total of 06 drill holes were drilled, conveniently located and distributed along the Tioyacu quarry (02 holes in the southern sector, 03 holes in the central area, and 01 hole in the northern sector) to geologically evaluate the deposit and know its characteristics at depth. These 06 drillings together with blast holes information and geological evaluation work allowed Cementos Pacasmayo to update the inventory of Mineral Resources and Reserves.

From 2018 to the present, Cementos Selva S.A.C., with the help and support of mining software such as Leapfrog and Minesight has updated its Resources and Reserves at the Tioyacu quarry. On March 1, 2022, Cementos Selva S.A. changed its corporate name to Cementos Selva S.A.C. (CSSAC).

From October to November 2023, the Rioja plant stopped operations because there was general power outage in the area. During 2023, Cementos Selva performed a drilling campaign in the Tioyacu quarry in order to confirm Mineral Reserves. In 2024, no blasting activities were carried out from May to September in the Tioyacu quarry due to delays from the authority for permits. During the month of November diamond drilling was carried out at the Tioyacu quarry in order to update the quarry’s Mineral Resources and Reserves.

The strata of the district of Elias Soplin Vargas, province of Rioja, San Martin region consists of Paleozoic/Mesozoic Age sedimentary strata of the Mitu Group, Pucara Group, Chambara Formation, Celendín Formation, Aramachay Formation, Condorsinga Formation, Ipururo Formation, and Quaternary Deposits.

Figure 6 Regional stratigraphic column

A lithological series of continental marine facies of limestones, marls, and dolomites have been identified in the quarry area. The classification of carbonate rocks based on the percentage of magnesium carbonate and clays, proposed by J.R.V Brooks (1896) and modified by J.A. Martinez-Alvarez, was used.

In the Tioyacu quarry, ten types of rocks were classified, corresponding to a sequence of limestones, magnesian limestones, dolomitic limestones, dolomitic marly limestones, marly limestones, marls, calcareous marls, clayey marls, dolomites, and calcareous dolomites. Overlying this formation are recent Quaternary deposits, consisting mainly of alluvial deposits comprised of colluvium and terraces with blocks and gravels in a sandy clay matrix.

Figure 7 Local stratigraphic column of the Tioyacu quarry.

Table 13 shows the main characteristics of the deposit.

Table 13 Characteristics of Tioyacu quarry

Figure 8 Geological Section of the Tioyacu quarry

Cementos Selva’s exploration activities at the Tioyacu quarry property involve drilling to characterize the geology adequately.

Table 14 Drilling campaigns in Tioyacu quarry

In 2024, Cementos Selva did not conduct further hydrogeological studies. The last hydrogeological studies were conducted in 2015 and the information was presented in the previously filed TRS titled “Technical Report Summary (TRS), Tioyacu Quarry and Rioja Cement Plant 20-F 229.601”, which was filed as Exhibit 96.3 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 Selva hired Geosym Consultores S.A.C (2015) to conduct hydrogeological investigations through 04 borings with piezometers, 19 Lefranc and Lugeon permeability tests, 01 Slug Test, and 02 Air Lift tests, physical-chemical parameter readings, gauging with use of current meter and groundwater sampling. The hydrogeological study included the evaluation of 04 piezometers. Geosym Consultores S.A.C concluded that the groundwater is above the current topographic elevation. The results of the hydrogeological study conducted in 2015 and the information was presented in the previously filed TRS titled “Technical Report Summary (TRS), Tioyacu Quarry and Rioja Cement Plant 20-F 229.601”, which was filed as Exhibit 96.3 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 previous TRS, CSSAC hired Consultora Minera Minconsult S.R.L to define the hydrogeological characteristics of the quarry.

Cementos Pacasmayo did not conduct further geotechnical studies in 2024. The last geotechnical studies were conducted in 2015 and the information was presented in the previously filed TRS titled “Technical Report Summary (TRS), Tioyacu Quarry and Rioja Cement Plant 20-F 229.601”, which was filed as Exhibit 96.3 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 Tioyacu 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 between 4 and 6 m, inter-ramp angles between 35° and 44°. The recommended bank angles and bench angles are 65°.

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

Cementos Selva S.A.C. 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 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 Rioja 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 Selva S.A.C has developed quality assurance procedures, which guarantee the accuracy of the results in the sampling, in the preparation and analysis of the samples.

Cementos Selva S.A.C. has implemented QAQC protocols for the development of exploration and production activities in the Tioyacu quarry in order to ensure the quality of the information used in the estimation of Resources and Reserves.

Based on the information and samples from the 2015 drilling campaign were re-analyzed to re-evaluate the deposit. The quality plan implemented by Cementos Selva 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 Tioyacu quarry

As part of the procedure, twin and duplicate samples were inserted at an insertion rate of 5.16% and 10.32%, respectively. Calcium (CaO), which is the main component of the limestone for cement production, was analyzed. The quality control (CaO) results showed that the Twin samples had an error of 3.08%, which is within the acceptable range (30%). The percentage of good samples was 100%. On the other hand, the quality control results of the duplicate samples showed an error of 0.94% (Coarse Duplicate) and 1.72% (Fine Duplicate), which is below the allowable error of 20%. The percentage of acceptable samples was 100%.

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

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

The necessary materials for storage and transport of the samples were provided. 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 management, 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 Selva S.A.C 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 Tioyacu quarry, core samples are duly stored in the Coreshack.

In the authors’ opinion, Cementos Selva S.A.C. has been complying with the international standards of ISO-9001 since 2015 and implemented Quality Assurance and Quality Control (QAQC). Cementos Selva S.A.C. 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 as 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 Selva S.A.C. has a quality plan for each of its operations, part of the corporate quality system.

Within the quality plan (S-CC-D-05 - Quality Plan), samples of raw materials such as limestone, clay, iron and coal are evaluated in the Rioja plant laboratory, where they are analyzed to determine the chemical composition of each material for the production of cement.

The procedures applied are wet chemical analysis of clinker and cement, wet physical and chemical analysis of raw meal and raw materials, general XRF procedures, physical-chemical analysis for coal samples, and physical tests for cements based on ASTM, NTP (Peruvian Technical Standard) and ISO standards.

For preparation of samples, staff follow the sample collection and preparation procedure, which consists of primary and secondary crushing, and reduction of the sample size by coning and quartering followed by pulverizing the sample in a ring mill.

The laboratory at Rioja 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 Rioja plant are the XRF fluorescence equipment and the compressive strength press, which are maintained annually and have inter-daily verification.

The tests for air content, fineness, autoclave expansion, compressive strength and setting time, and Vicat are made for all types of cements. The autoclave expansion, 14-day mortar 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, frequency of tests and data verification for the processes for receiving raw materials, crushing of materials, drying of raw materials, grinding of raw materials, clinkerization, grinding of cement and packaging of cement.

Table 16 Tests and frequency for each stage of the process

The quality plan implemented by Cementos Selva 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 Rioja plant.

Table 17 Quality Plan of Rioja plant

In 2024, CSSAC evaluated 50 blank samples, 250 duplicate samples, and 16 standard samples. 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 procedures include control of finished products, control on non-conforming products, validation of silos, density analysis, QAQC program, quality plan and quality control parameters for raw materials received at the Rioja Plant.

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

Sample preparation methods are sampling and preparation of raw meal, clinker, and cement samples, sampling and preparation of raw material samples, and preparation of coal samples for laboratory analysis.

The testing procedures are wet chemical analysis of clinker and cement, general XRF procedures, wet physical and chemical analysis of raw meal and raw materials, physical-chemical analysis for coal samples, physical tests for cements and quality plan.

Likewise, the control parameters are for raw material input, raw meal production, clinker production, cement grinding, sampling plan, frequency of tests for raw materials and sampling plan and frequency of tests for cement.

Cementos Selva S.A.C. has a Quality Assurance unit, which ensures compliance with the requirements for finished products specified in the technical product standards, based on Peruvian technical standards and traceable to the American Society for Testing and Materials (ASTM).

In the author’s opinion, the quality assurance system at the Rioja 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 Selva S.A.C. The QAQC is adequate for Mineral Reserves estimation.

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

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

The Data collection applies to exploration activities. For diamond drilling, the process flow for planning and execution of drillings, 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.

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 2024. No differences were detected between the database and the log files. A digital copy of all records is kept as pdf files. Digital certificates support the chemical analysis data.

The collection of the information considered the following: drill collars, survey, lithology, 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 in order 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. (Included Cementos Selva S.A.C.) through its quality assurance and control area 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 collection and processing data at the cement plant are accurate and free of significant errors. The information can be used for model 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 completed by external laboratories, the quality of the information is adequate for preparing Mineral Resource and Reserve estimates.

Cementos Pacasmayo S.A.A. (including Cementos Selva S.A.C) has Quality Assurance, Research and Development department. The objective of these departments is to develop, evaluate and research procedures for the development of products at laboratory scale and their scaling up to industrial scale. Another objective is to identify evaluations of fuel substitutes to reduce energy costs.

Cementos Pacasmayo S.A.A has also implemented their own procedures for the preparation, review, issuance and control of test reports associated with cement production.

The laboratory at Pacasmayo plant 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 (including Tioyacu quarry and Rioja Plant).

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 R&D activities are focused on the evaluation of alternative fuels such as rice husks. Laboratory tests are developed to continuously generate operational advantage for the company. Based on this work, the laboratory has determined (and confirmed with production estimates) that 1 tonne of limestone yields 0.78 tonnes of clinker and the clinker/cement factor with additions is 0.74.

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

To determine the cement design, which includes the clinker/cement factor, CPSAA uses the tests outlined in national technical standards such as NTP 334.009, NTP 334.090, and NTP 334.082. The cement design is modified when some of the chemical or physical requirements present a trend that could lead to non-compliance (non-conforming product). For the clinker/cement factor, priority is given to the compressive strength test at all ages (1, 3, 7, and 28 days). If the compressive strength shows a negative trend, even after modifying the operating variables to correct it, the clinker/cement factor is modified.

At the Pacasmayo plant, the studies conducted in the Research and Development laboratory and the Quality Control units include the substitution of fossil fuels for rice husks at the Rioja plant.

The main objective of the substitution of fossil fuels is the reduction of CO₂ or greenhouse gas emissions.

In 2024, CSSAC used 3,372 t of Alternative Fuel (rice husk measured as coal equivalent) in the Rioja plant. This result represented 7.10% of the total fuels used by the plant for cement production and a reduction in emissions of 8,853 t of 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 solids were generated considering the quality of the lithology based on the results of the analysis of the samples taken.

Because the deposit is a sedimentary one, the qualified persons interpreted the geological model with the help of a set of regularly-spaced sections parallel to and perpendicular to strike of the deposit shape.

According to the lithological characteristics and descriptions, eleven lithological horizons were recognized.

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

Table 18 Lithologic units of the Tioyacu quarry geological model

The main criteria for geological modeling is the quality, such as the content of oxides in limestones.

The lithological criteria is based on the macroscopic physical characteristics of the limestone horizons and the percentage of essential elements in its composition (oxides) that determine the quality of the limestones. Based on the quality and specifications of the cement plant, the qualified persons used a cut off 51% of CaO.

Table 19 shows the reference cut-off of the content of oxides that determine the classification of the final limestone rock products.

Table 19 Rioja plant material restrictions

The qualified persons built a block model based on the dimensions and spatial distribution of the deposits containing the material of economic interest. Table 20 shows the characteristics of the model.

Table 20 Characteristics of the block model

A total of 669 samples from 17 drill holes were used for resource estimation. Additionally, 7,855 blast hole control samples were used to strengthen the variogram analysis of the primary variable CaO.

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

For the bulk density of the rocks, diamond drilling samples were collected at the Tioyacu quarry, from which the bulk densities were determined by the wax method using the ASTM standard. The results of this determination and the bulk densities by lithological domain are shown in Table 21.

Table 21 Limestone density per horizon

The compositing was performed using control of the GEO Item. 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.

For compositing, the QPs assumed each initial core section has uniform grades in order to composite the grade profile of each borehole. During compositing, the goal was to preserve the original nature (variability) of the samples.

The calculated values considered in the compositing were for CaO, MgO, SO₃, SiO₂, Fe₂O₃, Al₂O₃, and K₂O.

Composites were made at different lengths to determine the optimum compositing length. The 4 m composite is the size that best fits the nature of the original sample and so was used in resource estimation.

In addition, the modeling considered the length of the composites based on an exact multiple of the block height, which coincided with the bench height.

Tables 22 and 23 show the results of the basic statistics of the CaO, SiO₂, MgO, SO₃, K₂O, Na₂O, and Cl contents for the original and composite data. The statistical analysis was done separately for each defined orebody (limestone horizon).

Tables 22 and 23 show the statistics of the limestone and marly limestone horizons as these are the main ones for the estimation of the Resources and Reserves.

Table 22 Basic statistics of the limestone horizon data

Table 23 Basic statistics of the data of the marly limestone horizon.

Extreme values are considered to be those analysis results that are not representative of the unit being studied and are defined in this work to be 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.

In the variogram analysis of the composited data, each level corresponded to a body of economic interest at the Tioyacu quarry. From the variogram analysis, it was concluded that acceptable experimental variograms could only be obtained in two lithologies due to the amount of data.

The QPs considered an experimental variogram to be acceptable if the number of pairs used to estimate the semi-variances are greater than or equal to 200. The variogram modeling consisted of fitting the experimental variograms to valid variogram models in MineSight. Of these models, the most representative was the spherical model, present in 85% of the structures, followed by the Gaussian model. Table 24 shows the results of variogram modeling.

Table 24 Variogram modeling parameters

The Ordinary Kriging Interpolation (OK) method was used for the primary CaO variable, Inverse of the Distance (ID2) for the secondary variables (MgO, SO₃, SiO₂, Fe₂O₃, Al₂O₃, and K₂O), and Nearest Neighbor (NN) for validations. Table 25 shows the main parameters used to determine the interpolations of the primary CaO variable of the Limestone and Magnesian Limestone horizons.

During interpolation, a minimum of two and a maximum of 20 composites were used to estimate block qualities. Additionally, the QPs restricted the interpolation to using a maximum of two composites from each drill hole in all the passes.

Table 25 Ordinary Kriging Estimation Parameters CaO

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 CaO content was considered and the impurity content. The impurities are restrictions determined by the cement production plant. Table 26 shows the Resources and the average values of their quality.

Table 26 Resource estimates (exclusive of Reserves) at the Tioyacu quarry

The main factor for the determination of Resources is quality. The costs of production, transportation, cement processing and cement dispatch were considered to determine the Resources. The cost estimate considers the increase in distances, which vary from 0.95 kilometers to 3 kilometers from the quarry to the plant and operating costs in the open pit during the 26 years of evaluation. Since there is no stripping or overburden, the stripping ratio is 0.

The costs are based on real sources of the current operations of Cementos Selva S.A.C. Chapter 19 shows the economic analysis for determining the mineral Resources.

The Mineral Resource evaluation has considered relevant economic and technical factors such as limestone production costs, cement sales prices, environmental and social viability at our operations.

The area associated with the Resource estimate is located at the lower boundary of the mining concession. Complement the geological information towards the S-SW zone of the quarry, considering future production activities. The resource estimate considers the Tioyacu deposit with a thickness of 90 m, defined by its continuity associated with the water table of the deposit.

The material produced in the Tioyacu quarry is blended to be sent to the plant. The quality of this material is analyzed in the Rioja plant laboratory before blending.

The information that supports the estimation of the quarry’s Resources is consistent, supported by diamond drilling campaigns such as the one carried out in 2023, which allows for a robust resource model.

From the environmental and social point of view, Cementos Pacasmayo (included Cementos Selva) has been developing activities in Peru for more than 60 years and is recognized as a Peruvian company with a high reputation, therefore, it is expected that the environmental and social viability will continue.

Cementos Selva S.A.C. obtained the parameters for classifying Resources based on staff´s experience designing the optimal drilling grid for sampling by geostatistical methods. Additionally, the variogram analysis was used as reference. Based on these criteria, Resource classes were defined.

In addition to the variogram distance criteria, the number of composites valued by each block and the number of composites per drillhole were also taken into account for categorization, as shown in Table 27.

Table 27 Criteria for Resource classification

After a detailed review of the technical information, procedures, and methodologies used, the database, primarily from diamond drilling, is considered to have been evaluated and meets appropriate quality control (QA/QC) standards.

No significant deficiencies have been identified that compromise the reliability of the data used. As a producing mine, most of the relevant technical and economic factors have been resolved.

The geological interpretation and block model construction are consistent with the available information; the estimation technique used (OK and ID) is appropriate for the type of deposit and reasonably reflects the distribution of mineralization in the limestone rocks.

The categorization of the resources into Measured, Indicated, and Inferred is considered appropriate based on the geological, geostatistical, and spatial criteria used. No regulatory noncompliance has been identified that would affect the validity of the results. It is recommended that additional studies be completed southward in the areas of greatest uncertainty, primarily related to MgO. Future validation through additional drilling may improve confidence in the estimate and allow for confirmation of the mineral resources.

Based on the review, the mineral resource estimate presented in the report is considered technically sound and reasonably represents the quarry’s mineralized potential. No significant deficiencies have been identified that invalidate the reported results.
 

Total Mineral Reserves estimated at the Tioyacu quarry are 11.2 million tonnes, as detailed in Table 28 in their different classes.

Additionally, the periodic update of the Mineral Reserves of the Tioyacu quarry takes into account the Reserves extracted when updating the Mineral Resources and Reserves models, any new “modifying factors”, or the change and entry of any new data.

The calcium oxide (CaO) content is the primary variable in the Mineral Resources and Reserves estimation. Its specific values depend on the lithological domain, with its concentration higher in some lithologies than in others.

The calculated Reserves in the limestone deposit was 6.3 M mt. of proven Reserves with 51.54% CaO and 4.9 M mt. of probable Reserves with 50.95% CaO for a total of 11.2 M mt. of Reserves with 51.28% CaO that support the mining plans for production and supply to the Cementos Selva S.A.C. plant.

Based on the estimated Reserves and the plant’s projected limestone consumption, the QPs estimate a life of mine of 26 years for the quarry.

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

ROM is considered to be 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 was considered to be negligible. The recovery in the quarry was assumed to be 100%.

The limestone received at the Rioja plant is properly stored and then mixed with other raw materials to obtain the raw meal feed (kiln feed). The raw meal contains 74% limestone. After the raw meal is obtained, it is fed to the calcination kiln to obtain clinker. Finally, the clinker is mixed with additives to obtain cement.

The Mineral Reserve estimation considers the costs of production, transportation, cement processing, and the quality restrictions of the raw material. The costs are based on actual costs from the current operations of Cementos Selva S.A.C. at the Tioyacu quarry and Rioja plant. Chapter 19 shows the economic analysis used to determine the Mineral Reserves.

Table 28 shows the Mineral Reserves at the Tioyacu quarry.

Table 28 Mineral Reserves expressed in millions of tonnes

In the QP’s opinion, the Reserves estimated for the quarry from the Resources consider the relevant risk factors and modifying factors which affect the tonnage and quality estimates. The primary variable is considered to be CaO, which is very stable in the deposit. SiO₂ is viewed as a secondary variable that, without adequate control, can have an inverse effect on the CaO content in the Reserves. MgO is a secondary control variable that is also taken into account to define the reserves, in the current report its average is slightly above the recommended level, which with an efficient mixing process is manageable.

In estimating Reserves and the production plans for the quarry, these variables have been adequately considered with production sequencing and blending processes.

Because Cementos Selva has been operating the Tioyacu quarry for 26 years and the deposit is relatively stable in the main quality metrics, the QP is of the opinion that the risks associated with the Reserve estimate is low.

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 Selva S.A.C., a wholly-owned subsidiary of Cementos Pacasmayo S.A.A, is the current owner of the Tioyacu quarry. Cementos Selva S.A.C. carries out the planning, production, supervision and quality control of the quarry to verify the activities and production according to the requirements of Rioja plant.

The production of the deposit begins with the drilling and blasting. The fragmented material is loaded with an excavator or front loader into dump trucks. The material is transported to the cement plant.

The quarry activities allow the production of fragmented limestone smaller than 15” in diameter, with carbonate grades according to the plant’s needs.

The sequence of limestone extraction is by benches, which are produced sequentially according to the annual requirement of the plant.

Figure 9 Tioyacu quarry mining sequence

Limestone mining at the Tioyacu quarry comprises the following unit operations:

Drilling activities at Tioyacu quarry are carried out with one diesel-powered drilling rig and one as stand-by.

Blasting allows the rock to be fragmented to a size suitable for loading, hauling, and crushing unit operations. Non-electric detonators and connectors are used to avoid vibration and sound.

Loading and transportation is conducted with 04 Volvo dump trucks of 14 m³ capacity, 01 excavator Hyundai and 01 front loader Volvo L150G.

The main equipment used to carry out mining activities at the Tioyacu quarry are shown in Table 29.

Table 29 Equipment of the Tioyacu quarry

In 2022, Cementos Selva SAC hired Magma Consulting S.A.C, to carry out hydrological, hydrogeological, geotechnical and seismic risk of the Tioyacu quarry.

The study determined the maximum and minimum bank slope angles and inter-ramp angles based on stability analysis and kinematic analysis.

As a result of the study, seven structural domains were defined. The Table 30 shows the design criteria in each geotechnical domain of the quarry.

Table 30 Tioyacu quarry design criteria

BFA: Face slope angle

IRA: Inter ramp angle

Magma Consulting S.A.C (2022), performed stability analyses, the results are shown in Table 31.

Table 31 Stability Analysis

In 2021 the hydrogeological study was conducted by Magma Consulting S.A.C. The objectives of the hydrogeological study was to track the installed piezometric levels and evaluate the variations until the end of 2021.

Table 32 2021 piezometric data

The limestone production reached by December 2024 is 267,009 tonnes, and no waste rock was removed. Based on the plant requirements and sales projection for the next 26 years, the pit design parameters for the Tioyacu quarry are presented in Table 33.

Table 33 Summary of Tioyacu quarry design parameters

Considering that the cement plant demands an average of 0.4 million tonnes per year of limestone, the plan for the next 26 years is shown in Table 34.

The proposed mining plan for the next 26 years is presented in Table 34.

Table 34 Mining plan for the next 26 years